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Input: psmouse - do not force stream mode
[linux-2.6/cjktty.git] / drivers / input / mouse / psmouse-base.c
blob33a3251e07668e58c60a6210ce73f7bc053dd84b
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 * Generic PS/2 Mouse
182 */
183
184 input_report_key(dev, BTN_LEFT, packet[0] & 1);
185 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
186 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
187
188 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
189 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
190
191 input_sync(dev);
192
193 return PSMOUSE_FULL_PACKET;
194 }
195
196 /*
197 * __psmouse_set_state() sets new psmouse state and resets all flags.
198 */
199
200 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
201 {
202 psmouse->state = new_state;
203 psmouse->pktcnt = psmouse->out_of_sync = 0;
204 psmouse->ps2dev.flags = 0;
205 psmouse->last = jiffies;
206 }
207
208
209 /*
210 * psmouse_set_state() sets new psmouse state and resets all flags and
211 * counters while holding serio lock so fighting with interrupt handler
212 * is not a concern.
213 */
214
215 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
216 {
217 serio_pause_rx(psmouse->ps2dev.serio);
218 __psmouse_set_state(psmouse, new_state);
219 serio_continue_rx(psmouse->ps2dev.serio);
220 }
221
222 /*
223 * psmouse_handle_byte() processes one byte of the input data stream
224 * by calling corresponding protocol handler.
225 */
226
227 static int psmouse_handle_byte(struct psmouse *psmouse)
228 {
229 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
230
231 switch (rc) {
232 case PSMOUSE_BAD_DATA:
233 if (psmouse->state == PSMOUSE_ACTIVATED) {
234 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
235 psmouse->name, psmouse->phys, psmouse->pktcnt);
236 if (++psmouse->out_of_sync == psmouse->resetafter) {
237 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
238 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
239 serio_reconnect(psmouse->ps2dev.serio);
240 return -1;
241 }
242 }
243 psmouse->pktcnt = 0;
244 break;
245
246 case PSMOUSE_FULL_PACKET:
247 psmouse->pktcnt = 0;
248 if (psmouse->out_of_sync) {
249 psmouse->out_of_sync = 0;
250 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
251 psmouse->name, psmouse->phys);
252 }
253 break;
254
255 case PSMOUSE_GOOD_DATA:
256 break;
257 }
258 return 0;
259 }
260
261 /*
262 * psmouse_interrupt() handles incoming characters, either passing them
263 * for normal processing or gathering them as command response.
264 */
265
266 static irqreturn_t psmouse_interrupt(struct serio *serio,
267 unsigned char data, unsigned int flags)
268 {
269 struct psmouse *psmouse = serio_get_drvdata(serio);
270
271 if (psmouse->state == PSMOUSE_IGNORE)
272 goto out;
273
274 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
275 if (psmouse->state == PSMOUSE_ACTIVATED)
276 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
277 flags & SERIO_TIMEOUT ? " timeout" : "",
278 flags & SERIO_PARITY ? " bad parity" : "");
279 ps2_cmd_aborted(&psmouse->ps2dev);
280 goto out;
281 }
282
283 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
284 if (ps2_handle_ack(&psmouse->ps2dev, data))
285 goto out;
286
287 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
288 if (ps2_handle_response(&psmouse->ps2dev, data))
289 goto out;
290
291 if (psmouse->state <= PSMOUSE_RESYNCING)
292 goto out;
293
294 if (psmouse->state == PSMOUSE_ACTIVATED &&
295 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
296 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
297 psmouse->name, psmouse->phys, psmouse->pktcnt);
298 psmouse->badbyte = psmouse->packet[0];
299 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
300 queue_work(kpsmoused_wq, &psmouse->resync_work);
301 goto out;
302 }
303
304 psmouse->packet[psmouse->pktcnt++] = data;
305 /*
306 * Check if this is a new device announcement (0xAA 0x00)
307 */
308 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
309 if (psmouse->pktcnt == 1) {
310 psmouse->last = jiffies;
311 goto out;
312 }
313
314 if (psmouse->packet[1] == PSMOUSE_RET_ID) {
315 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
316 serio_reconnect(serio);
317 goto out;
318 }
319 /*
320 * Not a new device, try processing first byte normally
321 */
322 psmouse->pktcnt = 1;
323 if (psmouse_handle_byte(psmouse))
324 goto out;
325
326 psmouse->packet[psmouse->pktcnt++] = data;
327 }
328
329 /*
330 * See if we need to force resync because mouse was idle for too long
331 */
332 if (psmouse->state == PSMOUSE_ACTIVATED &&
333 psmouse->pktcnt == 1 && psmouse->resync_time &&
334 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
335 psmouse->badbyte = psmouse->packet[0];
336 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
337 queue_work(kpsmoused_wq, &psmouse->resync_work);
338 goto out;
339 }
340
341 psmouse->last = jiffies;
342 psmouse_handle_byte(psmouse);
343
344 out:
345 return IRQ_HANDLED;
346 }
347
348
349 /*
350 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
351 * using sliced syntax, understood by advanced devices, such as Logitech
352 * or Synaptics touchpads. The command is encoded as:
353 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
354 * is the command.
355 */
356 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
357 {
358 int i;
359
360 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
361 return -1;
362
363 for (i = 6; i >= 0; i -= 2) {
364 unsigned char d = (command >> i) & 3;
365 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
366 return -1;
367 }
368
369 return 0;
370 }
371
372
373 /*
374 * psmouse_reset() resets the mouse into power-on state.
375 */
376 int psmouse_reset(struct psmouse *psmouse)
377 {
378 unsigned char param[2];
379
380 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
381 return -1;
382
383 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
384 return -1;
385
386 return 0;
387 }
388
389
390 /*
391 * Genius NetMouse magic init.
392 */
393 static int genius_detect(struct psmouse *psmouse, int set_properties)
394 {
395 struct ps2dev *ps2dev = &psmouse->ps2dev;
396 unsigned char param[4];
397
398 param[0] = 3;
399 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
400 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
401 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
402 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
403 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
404
405 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
406 return -1;
407
408 if (set_properties) {
409 set_bit(BTN_EXTRA, psmouse->dev->keybit);
410 set_bit(BTN_SIDE, psmouse->dev->keybit);
411 set_bit(REL_WHEEL, psmouse->dev->relbit);
412
413 psmouse->vendor = "Genius";
414 psmouse->name = "Mouse";
415 psmouse->pktsize = 4;
416 }
417
418 return 0;
419 }
420
421 /*
422 * IntelliMouse magic init.
423 */
424 static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
425 {
426 struct ps2dev *ps2dev = &psmouse->ps2dev;
427 unsigned char param[2];
428
429 param[0] = 200;
430 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
431 param[0] = 100;
432 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
433 param[0] = 80;
434 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
435 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
436
437 if (param[0] != 3)
438 return -1;
439
440 if (set_properties) {
441 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
442 set_bit(REL_WHEEL, psmouse->dev->relbit);
443
444 if (!psmouse->vendor) psmouse->vendor = "Generic";
445 if (!psmouse->name) psmouse->name = "Wheel Mouse";
446 psmouse->pktsize = 4;
447 }
448
449 return 0;
450 }
451
452 /*
453 * Try IntelliMouse/Explorer magic init.
454 */
455 static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
456 {
457 struct ps2dev *ps2dev = &psmouse->ps2dev;
458 unsigned char param[2];
459
460 intellimouse_detect(psmouse, 0);
461
462 param[0] = 200;
463 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
464 param[0] = 200;
465 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
466 param[0] = 80;
467 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
468 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
469
470 if (param[0] != 4)
471 return -1;
472
473 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
474 param[0] = 200;
475 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
476 param[0] = 80;
477 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
478 param[0] = 40;
479 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
480
481 if (set_properties) {
482 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
483 set_bit(REL_WHEEL, psmouse->dev->relbit);
484 set_bit(REL_HWHEEL, psmouse->dev->relbit);
485 set_bit(BTN_SIDE, psmouse->dev->keybit);
486 set_bit(BTN_EXTRA, psmouse->dev->keybit);
487
488 if (!psmouse->vendor) psmouse->vendor = "Generic";
489 if (!psmouse->name) psmouse->name = "Explorer Mouse";
490 psmouse->pktsize = 4;
491 }
492
493 return 0;
494 }
495
496 /*
497 * Kensington ThinkingMouse / ExpertMouse magic init.
498 */
499 static int thinking_detect(struct psmouse *psmouse, int set_properties)
500 {
501 struct ps2dev *ps2dev = &psmouse->ps2dev;
502 unsigned char param[2];
503 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
504 int i;
505
506 param[0] = 10;
507 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
508 param[0] = 0;
509 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
510 for (i = 0; i < ARRAY_SIZE(seq); i++) {
511 param[0] = seq[i];
512 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
513 }
514 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
515
516 if (param[0] != 2)
517 return -1;
518
519 if (set_properties) {
520 set_bit(BTN_EXTRA, psmouse->dev->keybit);
521
522 psmouse->vendor = "Kensington";
523 psmouse->name = "ThinkingMouse";
524 }
525
526 return 0;
527 }
528
529 /*
530 * Bare PS/2 protocol "detection". Always succeeds.
531 */
532 static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
533 {
534 if (set_properties) {
535 if (!psmouse->vendor) psmouse->vendor = "Generic";
536 if (!psmouse->name) psmouse->name = "Mouse";
537 }
538
539 return 0;
540 }
541
542
543 /*
544 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
545 * the mouse may have.
546 */
547
548 static int psmouse_extensions(struct psmouse *psmouse,
549 unsigned int max_proto, int set_properties)
550 {
551 int synaptics_hardware = 0;
552
553 /*
554 * We always check for lifebook because it does not disturb mouse
555 * (it only checks DMI information).
556 */
557 if (lifebook_detect(psmouse, set_properties) == 0) {
558 if (max_proto > PSMOUSE_IMEX) {
559 if (!set_properties || lifebook_init(psmouse) == 0)
560 return PSMOUSE_LIFEBOOK;
561 }
562 }
563
564 /*
565 * Try Kensington ThinkingMouse (we try first, because synaptics probe
566 * upsets the thinkingmouse).
567 */
568
569 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
570 return PSMOUSE_THINKPS;
571
572 /*
573 * Try Synaptics TouchPad
574 */
575 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
576 synaptics_hardware = 1;
577
578 if (max_proto > PSMOUSE_IMEX) {
579 if (!set_properties || synaptics_init(psmouse) == 0)
580 return PSMOUSE_SYNAPTICS;
581 /*
582 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
583 * Unfortunately Logitech/Genius probes confuse some firmware versions so
584 * we'll have to skip them.
585 */
586 max_proto = PSMOUSE_IMEX;
587 }
588 /*
589 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
590 */
591 synaptics_reset(psmouse);
592 }
593
594 /*
595 * Try ALPS TouchPad
596 */
597 if (max_proto > PSMOUSE_IMEX) {
598 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
599 if (alps_detect(psmouse, set_properties) == 0) {
600 if (!set_properties || alps_init(psmouse) == 0)
601 return PSMOUSE_ALPS;
602 /*
603 * Init failed, try basic relative protocols
604 */
605 max_proto = PSMOUSE_IMEX;
606 }
607 }
608
609 if (max_proto > PSMOUSE_IMEX) {
610
611 if (genius_detect(psmouse, set_properties) == 0)
612 return PSMOUSE_GENPS;
613
614 if (ps2pp_init(psmouse, set_properties) == 0)
615 return PSMOUSE_PS2PP;
616
617 if (trackpoint_detect(psmouse, set_properties) == 0)
618 return PSMOUSE_TRACKPOINT;
619
620 if (touchkit_ps2_detect(psmouse, set_properties) == 0)
621 return PSMOUSE_TOUCHKIT_PS2;
622 }
623
624 /*
625 * Reset to defaults in case the device got confused by extended
626 * protocol probes. Note that we do full reset becuase some mice
627 * put themselves to sleep when see PSMOUSE_RESET_DIS.
628 */
629 psmouse_reset(psmouse);
630
631 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
632 return PSMOUSE_IMEX;
633
634 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
635 return PSMOUSE_IMPS;
636
637 /*
638 * Okay, all failed, we have a standard mouse here. The number of the buttons
639 * is still a question, though. We assume 3.
640 */
641 ps2bare_detect(psmouse, set_properties);
642
643 if (synaptics_hardware) {
644 /*
645 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
646 * We need to reset the touchpad because if there is a track point on the
647 * pass through port it could get disabled while probing for protocol
648 * extensions.
649 */
650 psmouse_reset(psmouse);
651 }
652
653 return PSMOUSE_PS2;
654 }
655
656 static const struct psmouse_protocol psmouse_protocols[] = {
657 {
658 .type = PSMOUSE_PS2,
659 .name = "PS/2",
660 .alias = "bare",
661 .maxproto = 1,
662 .detect = ps2bare_detect,
663 },
664 {
665 .type = PSMOUSE_PS2PP,
666 .name = "PS2++",
667 .alias = "logitech",
668 .detect = ps2pp_init,
669 },
670 {
671 .type = PSMOUSE_THINKPS,
672 .name = "ThinkPS/2",
673 .alias = "thinkps",
674 .detect = thinking_detect,
675 },
676 {
677 .type = PSMOUSE_GENPS,
678 .name = "GenPS/2",
679 .alias = "genius",
680 .detect = genius_detect,
681 },
682 {
683 .type = PSMOUSE_IMPS,
684 .name = "ImPS/2",
685 .alias = "imps",
686 .maxproto = 1,
687 .detect = intellimouse_detect,
688 },
689 {
690 .type = PSMOUSE_IMEX,
691 .name = "ImExPS/2",
692 .alias = "exps",
693 .maxproto = 1,
694 .detect = im_explorer_detect,
695 },
696 {
697 .type = PSMOUSE_SYNAPTICS,
698 .name = "SynPS/2",
699 .alias = "synaptics",
700 .detect = synaptics_detect,
701 .init = synaptics_init,
702 },
703 {
704 .type = PSMOUSE_ALPS,
705 .name = "AlpsPS/2",
706 .alias = "alps",
707 .detect = alps_detect,
708 .init = alps_init,
709 },
710 {
711 .type = PSMOUSE_LIFEBOOK,
712 .name = "LBPS/2",
713 .alias = "lifebook",
714 .init = lifebook_init,
715 },
716 {
717 .type = PSMOUSE_TRACKPOINT,
718 .name = "TPPS/2",
719 .alias = "trackpoint",
720 .detect = trackpoint_detect,
721 },
722 {
723 .type = PSMOUSE_TOUCHKIT_PS2,
724 .name = "touchkitPS/2",
725 .alias = "touchkit",
726 .detect = touchkit_ps2_detect,
727 },
728 {
729 .type = PSMOUSE_AUTO,
730 .name = "auto",
731 .alias = "any",
732 .maxproto = 1,
733 },
734 };
735
736 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
737 {
738 int i;
739
740 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
741 if (psmouse_protocols[i].type == type)
742 return &psmouse_protocols[i];
743
744 WARN_ON(1);
745 return &psmouse_protocols[0];
746 }
747
748 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
749 {
750 const struct psmouse_protocol *p;
751 int i;
752
753 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
754 p = &psmouse_protocols[i];
755
756 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
757 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
758 return &psmouse_protocols[i];
759 }
760
761 return NULL;
762 }
763
764
765 /*
766 * psmouse_probe() probes for a PS/2 mouse.
767 */
768
769 static int psmouse_probe(struct psmouse *psmouse)
770 {
771 struct ps2dev *ps2dev = &psmouse->ps2dev;
772 unsigned char param[2];
773
774 /*
775 * First, we check if it's a mouse. It should send 0x00 or 0x03
776 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
777 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
778 * ID queries, probably due to a firmware bug.
779 */
780
781 param[0] = 0xa5;
782 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
783 return -1;
784
785 if (param[0] != 0x00 && param[0] != 0x03 &&
786 param[0] != 0x04 && param[0] != 0xff)
787 return -1;
788
789 /*
790 * Then we reset and disable the mouse so that it doesn't generate events.
791 */
792
793 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
794 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
795
796 return 0;
797 }
798
799 /*
800 * Here we set the mouse resolution.
801 */
802
803 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
804 {
805 static const unsigned char params[] = { 0, 1, 2, 2, 3 };
806 unsigned char p;
807
808 if (resolution == 0 || resolution > 200)
809 resolution = 200;
810
811 p = params[resolution / 50];
812 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
813 psmouse->resolution = 25 << p;
814 }
815
816 /*
817 * Here we set the mouse report rate.
818 */
819
820 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
821 {
822 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
823 unsigned char r;
824 int i = 0;
825
826 while (rates[i] > rate) i++;
827 r = rates[i];
828 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
829 psmouse->rate = r;
830 }
831
832 /*
833 * psmouse_initialize() initializes the mouse to a sane state.
834 */
835
836 static void psmouse_initialize(struct psmouse *psmouse)
837 {
838 /*
839 * We set the mouse report rate, resolution and scaling.
840 */
841
842 if (psmouse_max_proto != PSMOUSE_PS2) {
843 psmouse->set_rate(psmouse, psmouse->rate);
844 psmouse->set_resolution(psmouse, psmouse->resolution);
845 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
846 }
847 }
848
849 /*
850 * psmouse_activate() enables the mouse so that we get motion reports from it.
851 */
852
853 static void psmouse_activate(struct psmouse *psmouse)
854 {
855 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
856 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
857 psmouse->ps2dev.serio->phys);
858
859 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
860 }
861
862
863 /*
864 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
865 * reports from it unless we explicitely request it.
866 */
867
868 static void psmouse_deactivate(struct psmouse *psmouse)
869 {
870 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
871 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
872 psmouse->ps2dev.serio->phys);
873
874 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
875 }
876
877 /*
878 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
879 */
880
881 static int psmouse_poll(struct psmouse *psmouse)
882 {
883 return ps2_command(&psmouse->ps2dev, psmouse->packet,
884 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
885 }
886
887
888 /*
889 * psmouse_resync() attempts to re-validate current protocol.
890 */
891
892 static void psmouse_resync(struct work_struct *work)
893 {
894 struct psmouse *parent = NULL, *psmouse =
895 container_of(work, struct psmouse, resync_work);
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);
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 struct psmouse *parent = NULL;
992
993 mutex_lock(&psmouse_mutex);
994
995 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
996 parent = serio_get_drvdata(serio->parent);
997 psmouse_deactivate(parent);
998 }
999
1000 psmouse_deactivate(psmouse);
1001
1002 if (psmouse->cleanup)
1003 psmouse->cleanup(psmouse);
1004
1005 psmouse_reset(psmouse);
1006
1007 /*
1008 * Some boxes, such as HP nx7400, get terribly confused if mouse
1009 * is not fully enabled before suspending/shutting down.
1010 */
1011 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1012
1013 if (parent) {
1014 if (parent->pt_deactivate)
1015 parent->pt_deactivate(parent);
1016
1017 psmouse_activate(parent);
1018 }
1019
1020 mutex_unlock(&psmouse_mutex);
1021 }
1022
1023 /*
1024 * psmouse_disconnect() closes and frees.
1025 */
1026
1027 static void psmouse_disconnect(struct serio *serio)
1028 {
1029 struct psmouse *psmouse, *parent = NULL;
1030
1031 psmouse = serio_get_drvdata(serio);
1032
1033 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1034
1035 mutex_lock(&psmouse_mutex);
1036
1037 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1038
1039 /* make sure we don't have a resync in progress */
1040 mutex_unlock(&psmouse_mutex);
1041 flush_workqueue(kpsmoused_wq);
1042 mutex_lock(&psmouse_mutex);
1043
1044 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1045 parent = serio_get_drvdata(serio->parent);
1046 psmouse_deactivate(parent);
1047 }
1048
1049 if (psmouse->disconnect)
1050 psmouse->disconnect(psmouse);
1051
1052 if (parent && parent->pt_deactivate)
1053 parent->pt_deactivate(parent);
1054
1055 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1056
1057 serio_close(serio);
1058 serio_set_drvdata(serio, NULL);
1059 input_unregister_device(psmouse->dev);
1060 kfree(psmouse);
1061
1062 if (parent)
1063 psmouse_activate(parent);
1064
1065 mutex_unlock(&psmouse_mutex);
1066 }
1067
1068 static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto)
1069 {
1070 struct input_dev *input_dev = psmouse->dev;
1071
1072 input_dev->private = psmouse;
1073 input_dev->cdev.dev = &psmouse->ps2dev.serio->dev;
1074
1075 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
1076 input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
1077 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
1078
1079 psmouse->set_rate = psmouse_set_rate;
1080 psmouse->set_resolution = psmouse_set_resolution;
1081 psmouse->poll = psmouse_poll;
1082 psmouse->protocol_handler = psmouse_process_byte;
1083 psmouse->pktsize = 3;
1084
1085 if (proto && (proto->detect || proto->init)) {
1086 if (proto->detect && proto->detect(psmouse, 1) < 0)
1087 return -1;
1088
1089 if (proto->init && proto->init(psmouse) < 0)
1090 return -1;
1091
1092 psmouse->type = proto->type;
1093 }
1094 else
1095 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
1096
1097 /*
1098 * If mouse's packet size is 3 there is no point in polling the
1099 * device in hopes to detect protocol reset - we won't get less
1100 * than 3 bytes response anyhow.
1101 */
1102 if (psmouse->pktsize == 3)
1103 psmouse->resync_time = 0;
1104
1105 /*
1106 * Some smart KVMs fake response to POLL command returning just
1107 * 3 bytes and messing up our resync logic, so if initial poll
1108 * fails we won't try polling the device anymore. Hopefully
1109 * such KVM will maintain initially selected protocol.
1110 */
1111 if (psmouse->resync_time && psmouse->poll(psmouse))
1112 psmouse->resync_time = 0;
1113
1114 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1115 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
1116
1117 input_dev->name = psmouse->devname;
1118 input_dev->phys = psmouse->phys;
1119 input_dev->id.bustype = BUS_I8042;
1120 input_dev->id.vendor = 0x0002;
1121 input_dev->id.product = psmouse->type;
1122 input_dev->id.version = psmouse->model;
1123
1124 return 0;
1125 }
1126
1127 /*
1128 * psmouse_connect() is a callback from the serio module when
1129 * an unhandled serio port is found.
1130 */
1131 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1132 {
1133 struct psmouse *psmouse, *parent = NULL;
1134 struct input_dev *input_dev;
1135 int retval = 0, error = -ENOMEM;
1136
1137 mutex_lock(&psmouse_mutex);
1138
1139 /*
1140 * If this is a pass-through port deactivate parent so the device
1141 * connected to this port can be successfully identified
1142 */
1143 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1144 parent = serio_get_drvdata(serio->parent);
1145 psmouse_deactivate(parent);
1146 }
1147
1148 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1149 input_dev = input_allocate_device();
1150 if (!psmouse || !input_dev)
1151 goto err_free;
1152
1153 ps2_init(&psmouse->ps2dev, serio);
1154 INIT_WORK(&psmouse->resync_work, psmouse_resync);
1155 psmouse->dev = input_dev;
1156 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1157
1158 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1159
1160 serio_set_drvdata(serio, psmouse);
1161
1162 error = serio_open(serio, drv);
1163 if (error)
1164 goto err_clear_drvdata;
1165
1166 if (psmouse_probe(psmouse) < 0) {
1167 error = -ENODEV;
1168 goto err_close_serio;
1169 }
1170
1171 psmouse->rate = psmouse_rate;
1172 psmouse->resolution = psmouse_resolution;
1173 psmouse->resetafter = psmouse_resetafter;
1174 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1175 psmouse->smartscroll = psmouse_smartscroll;
1176
1177 psmouse_switch_protocol(psmouse, NULL);
1178
1179 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1180 psmouse_initialize(psmouse);
1181
1182 error = input_register_device(psmouse->dev);
1183 if (error)
1184 goto err_protocol_disconnect;
1185
1186 if (parent && parent->pt_activate)
1187 parent->pt_activate(parent);
1188
1189 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1190 if (error)
1191 goto err_pt_deactivate;
1192
1193 psmouse_activate(psmouse);
1194
1195 out:
1196 /* If this is a pass-through port the parent needs to be re-activated */
1197 if (parent)
1198 psmouse_activate(parent);
1199
1200 mutex_unlock(&psmouse_mutex);
1201 return retval;
1202
1203 err_pt_deactivate:
1204 if (parent && parent->pt_deactivate)
1205 parent->pt_deactivate(parent);
1206 err_protocol_disconnect:
1207 if (psmouse->disconnect)
1208 psmouse->disconnect(psmouse);
1209 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1210 err_close_serio:
1211 serio_close(serio);
1212 err_clear_drvdata:
1213 serio_set_drvdata(serio, NULL);
1214 err_free:
1215 input_free_device(input_dev);
1216 kfree(psmouse);
1217
1218 retval = error;
1219 goto out;
1220 }
1221
1222
1223 static int psmouse_reconnect(struct serio *serio)
1224 {
1225 struct psmouse *psmouse = serio_get_drvdata(serio);
1226 struct psmouse *parent = NULL;
1227 struct serio_driver *drv = serio->drv;
1228 int rc = -1;
1229
1230 if (!drv || !psmouse) {
1231 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
1232 return -1;
1233 }
1234
1235 mutex_lock(&psmouse_mutex);
1236
1237 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1238 parent = serio_get_drvdata(serio->parent);
1239 psmouse_deactivate(parent);
1240 }
1241
1242 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1243
1244 if (psmouse->reconnect) {
1245 if (psmouse->reconnect(psmouse))
1246 goto out;
1247 } else if (psmouse_probe(psmouse) < 0 ||
1248 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
1249 goto out;
1250
1251 /* ok, the device type (and capabilities) match the old one,
1252 * we can continue using it, complete intialization
1253 */
1254 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1255
1256 psmouse_initialize(psmouse);
1257
1258 if (parent && parent->pt_activate)
1259 parent->pt_activate(parent);
1260
1261 psmouse_activate(psmouse);
1262 rc = 0;
1263
1264 out:
1265 /* If this is a pass-through port the parent waits to be activated */
1266 if (parent)
1267 psmouse_activate(parent);
1268
1269 mutex_unlock(&psmouse_mutex);
1270 return rc;
1271 }
1272
1273 static struct serio_device_id psmouse_serio_ids[] = {
1274 {
1275 .type = SERIO_8042,
1276 .proto = SERIO_ANY,
1277 .id = SERIO_ANY,
1278 .extra = SERIO_ANY,
1279 },
1280 {
1281 .type = SERIO_PS_PSTHRU,
1282 .proto = SERIO_ANY,
1283 .id = SERIO_ANY,
1284 .extra = SERIO_ANY,
1285 },
1286 { 0 }
1287 };
1288
1289 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1290
1291 static struct serio_driver psmouse_drv = {
1292 .driver = {
1293 .name = "psmouse",
1294 },
1295 .description = DRIVER_DESC,
1296 .id_table = psmouse_serio_ids,
1297 .interrupt = psmouse_interrupt,
1298 .connect = psmouse_connect,
1299 .reconnect = psmouse_reconnect,
1300 .disconnect = psmouse_disconnect,
1301 .cleanup = psmouse_cleanup,
1302 };
1303
1304 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1305 char *buf)
1306 {
1307 struct serio *serio = to_serio_port(dev);
1308 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1309 struct psmouse *psmouse;
1310 int retval;
1311
1312 retval = serio_pin_driver(serio);
1313 if (retval)
1314 return retval;
1315
1316 if (serio->drv != &psmouse_drv) {
1317 retval = -ENODEV;
1318 goto out;
1319 }
1320
1321 psmouse = serio_get_drvdata(serio);
1322
1323 retval = attr->show(psmouse, attr->data, buf);
1324
1325 out:
1326 serio_unpin_driver(serio);
1327 return retval;
1328 }
1329
1330 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1331 const char *buf, size_t count)
1332 {
1333 struct serio *serio = to_serio_port(dev);
1334 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1335 struct psmouse *psmouse, *parent = NULL;
1336 int retval;
1337
1338 retval = serio_pin_driver(serio);
1339 if (retval)
1340 return retval;
1341
1342 if (serio->drv != &psmouse_drv) {
1343 retval = -ENODEV;
1344 goto out_unpin;
1345 }
1346
1347 retval = mutex_lock_interruptible(&psmouse_mutex);
1348 if (retval)
1349 goto out_unpin;
1350
1351 psmouse = serio_get_drvdata(serio);
1352
1353 if (psmouse->state == PSMOUSE_IGNORE) {
1354 retval = -ENODEV;
1355 goto out_unlock;
1356 }
1357
1358 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1359 parent = serio_get_drvdata(serio->parent);
1360 psmouse_deactivate(parent);
1361 }
1362
1363 psmouse_deactivate(psmouse);
1364
1365 retval = attr->set(psmouse, attr->data, buf, count);
1366
1367 if (retval != -ENODEV)
1368 psmouse_activate(psmouse);
1369
1370 if (parent)
1371 psmouse_activate(parent);
1372
1373 out_unlock:
1374 mutex_unlock(&psmouse_mutex);
1375 out_unpin:
1376 serio_unpin_driver(serio);
1377 return retval;
1378 }
1379
1380 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1381 {
1382 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1383
1384 return sprintf(buf, "%u\n", *field);
1385 }
1386
1387 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1388 {
1389 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1390 unsigned long value;
1391 char *rest;
1392
1393 value = simple_strtoul(buf, &rest, 10);
1394 if (*rest)
1395 return -EINVAL;
1396
1397 if ((unsigned int)value != value)
1398 return -EINVAL;
1399
1400 *field = value;
1401
1402 return count;
1403 }
1404
1405 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1406 {
1407 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1408 }
1409
1410 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1411 {
1412 struct serio *serio = psmouse->ps2dev.serio;
1413 struct psmouse *parent = NULL;
1414 struct input_dev *old_dev, *new_dev;
1415 const struct psmouse_protocol *proto, *old_proto;
1416 int error;
1417 int retry = 0;
1418
1419 proto = psmouse_protocol_by_name(buf, count);
1420 if (!proto)
1421 return -EINVAL;
1422
1423 if (psmouse->type == proto->type)
1424 return count;
1425
1426 new_dev = input_allocate_device();
1427 if (!new_dev)
1428 return -ENOMEM;
1429
1430 while (serio->child) {
1431 if (++retry > 3) {
1432 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n");
1433 input_free_device(new_dev);
1434 return -EIO;
1435 }
1436
1437 mutex_unlock(&psmouse_mutex);
1438 serio_unpin_driver(serio);
1439 serio_unregister_child_port(serio);
1440 serio_pin_driver_uninterruptible(serio);
1441 mutex_lock(&psmouse_mutex);
1442
1443 if (serio->drv != &psmouse_drv) {
1444 input_free_device(new_dev);
1445 return -ENODEV;
1446 }
1447
1448 if (psmouse->type == proto->type) {
1449 input_free_device(new_dev);
1450 return count; /* switched by other thread */
1451 }
1452 }
1453
1454 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1455 parent = serio_get_drvdata(serio->parent);
1456 if (parent->pt_deactivate)
1457 parent->pt_deactivate(parent);
1458 }
1459
1460 old_dev = psmouse->dev;
1461 old_proto = psmouse_protocol_by_type(psmouse->type);
1462
1463 if (psmouse->disconnect)
1464 psmouse->disconnect(psmouse);
1465
1466 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1467
1468 psmouse->dev = new_dev;
1469 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1470
1471 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1472 psmouse_reset(psmouse);
1473 /* default to PSMOUSE_PS2 */
1474 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1475 }
1476
1477 psmouse_initialize(psmouse);
1478 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1479
1480 error = input_register_device(psmouse->dev);
1481 if (error) {
1482 if (psmouse->disconnect)
1483 psmouse->disconnect(psmouse);
1484
1485 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1486 input_free_device(new_dev);
1487 psmouse->dev = old_dev;
1488 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1489 psmouse_switch_protocol(psmouse, old_proto);
1490 psmouse_initialize(psmouse);
1491 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1492
1493 return error;
1494 }
1495
1496 input_unregister_device(old_dev);
1497
1498 if (parent && parent->pt_activate)
1499 parent->pt_activate(parent);
1500
1501 return count;
1502 }
1503
1504 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1505 {
1506 unsigned long value;
1507 char *rest;
1508
1509 value = simple_strtoul(buf, &rest, 10);
1510 if (*rest)
1511 return -EINVAL;
1512
1513 psmouse->set_rate(psmouse, value);
1514 return count;
1515 }
1516
1517 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1518 {
1519 unsigned long value;
1520 char *rest;
1521
1522 value = simple_strtoul(buf, &rest, 10);
1523 if (*rest)
1524 return -EINVAL;
1525
1526 psmouse->set_resolution(psmouse, value);
1527 return count;
1528 }
1529
1530
1531 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1532 {
1533 const struct psmouse_protocol *proto;
1534
1535 if (!val)
1536 return -EINVAL;
1537
1538 proto = psmouse_protocol_by_name(val, strlen(val));
1539
1540 if (!proto || !proto->maxproto)
1541 return -EINVAL;
1542
1543 *((unsigned int *)kp->arg) = proto->type;
1544
1545 return 0;
1546 }
1547
1548 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1549 {
1550 int type = *((unsigned int *)kp->arg);
1551
1552 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1553 }
1554
1555 static int __init psmouse_init(void)
1556 {
1557 int err;
1558
1559 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1560 if (!kpsmoused_wq) {
1561 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
1562 return -ENOMEM;
1563 }
1564
1565 err = serio_register_driver(&psmouse_drv);
1566 if (err)
1567 destroy_workqueue(kpsmoused_wq);
1568
1569 return err;
1570 }
1571
1572 static void __exit psmouse_exit(void)
1573 {
1574 serio_unregister_driver(&psmouse_drv);
1575 destroy_workqueue(kpsmoused_wq);
1576 }
1577
1578 module_init(psmouse_init);
1579 module_exit(psmouse_exit);
CJK support for tty framebuffer vt