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[ARM] pxa: update defconfig for Verdex Pro
[linux-2.6/verdex.git] / drivers / input / mouse / psmouse-base.c
blob690aed90543694e0c4d94cf6e8234bbef228843e
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/slab.h>
17 #include <linux/interrupt.h>
18 #include <linux/input.h>
19 #include <linux/serio.h>
20 #include <linux/init.h>
21 #include <linux/libps2.h>
22 #include <linux/mutex.h>
23
24 #include "psmouse.h"
25 #include "synaptics.h"
26 #include "logips2pp.h"
27 #include "alps.h"
28 #include "hgpk.h"
29 #include "lifebook.h"
30 #include "trackpoint.h"
31 #include "touchkit_ps2.h"
32 #include "elantech.h"
33 #include "sentelic.h"
34
35 #define DRIVER_DESC "PS/2 mouse driver"
36
37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
38 MODULE_DESCRIPTION(DRIVER_DESC);
39 MODULE_LICENSE("GPL");
40
41 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
42 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
43 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
44 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
45 #define param_set_proto_abbrev psmouse_set_maxproto
46 #define param_get_proto_abbrev psmouse_get_maxproto
47 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
48 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
49
50 static unsigned int psmouse_resolution = 200;
51 module_param_named(resolution, psmouse_resolution, uint, 0644);
52 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
53
54 static unsigned int psmouse_rate = 100;
55 module_param_named(rate, psmouse_rate, uint, 0644);
56 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
57
58 static unsigned int psmouse_smartscroll = 1;
59 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
60 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
61
62 static unsigned int psmouse_resetafter = 5;
63 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
64 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
65
66 static unsigned int psmouse_resync_time;
67 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
68 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
69
70 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
71 NULL,
72 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
73 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
74 (void *) offsetof(struct psmouse, rate),
75 psmouse_show_int_attr, psmouse_attr_set_rate);
76 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
77 (void *) offsetof(struct psmouse, resolution),
78 psmouse_show_int_attr, psmouse_attr_set_resolution);
79 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
80 (void *) offsetof(struct psmouse, resetafter),
81 psmouse_show_int_attr, psmouse_set_int_attr);
82 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
83 (void *) offsetof(struct psmouse, resync_time),
84 psmouse_show_int_attr, psmouse_set_int_attr);
85
86 static struct attribute *psmouse_attributes[] = {
87 &psmouse_attr_protocol.dattr.attr,
88 &psmouse_attr_rate.dattr.attr,
89 &psmouse_attr_resolution.dattr.attr,
90 &psmouse_attr_resetafter.dattr.attr,
91 &psmouse_attr_resync_time.dattr.attr,
92 NULL
93 };
94
95 static struct attribute_group psmouse_attribute_group = {
96 .attrs = psmouse_attributes,
97 };
98
99 /*
100 * psmouse_mutex protects all operations changing state of mouse
101 * (connecting, disconnecting, changing rate or resolution via
102 * sysfs). We could use a per-device semaphore but since there
103 * rarely more than one PS/2 mouse connected and since semaphore
104 * is taken in "slow" paths it is not worth it.
105 */
106 static DEFINE_MUTEX(psmouse_mutex);
107
108 static struct workqueue_struct *kpsmoused_wq;
109
110 struct psmouse_protocol {
111 enum psmouse_type type;
112 bool maxproto;
113 const char *name;
114 const char *alias;
115 int (*detect)(struct psmouse *, bool);
116 int (*init)(struct psmouse *);
117 };
118
119 /*
120 * psmouse_process_byte() analyzes the PS/2 data stream and reports
121 * relevant events to the input module once full packet has arrived.
122 */
123
124 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
125 {
126 struct input_dev *dev = psmouse->dev;
127 unsigned char *packet = psmouse->packet;
128
129 if (psmouse->pktcnt < psmouse->pktsize)
130 return PSMOUSE_GOOD_DATA;
131
132 /*
133 * Full packet accumulated, process it
134 */
135
136 /*
137 * Scroll wheel on IntelliMice, scroll buttons on NetMice
138 */
139
140 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
141 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
142
143 /*
144 * Scroll wheel and buttons on IntelliMouse Explorer
145 */
146
147 if (psmouse->type == PSMOUSE_IMEX) {
148 switch (packet[3] & 0xC0) {
149 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
150 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
151 break;
152 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
153 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
154 break;
155 case 0x00:
156 case 0xC0:
157 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
158 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
159 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
160 break;
161 }
162 }
163
164 /*
165 * Extra buttons on Genius NewNet 3D
166 */
167
168 if (psmouse->type == PSMOUSE_GENPS) {
169 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
170 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
171 }
172
173 /*
174 * Extra button on ThinkingMouse
175 */
176 if (psmouse->type == PSMOUSE_THINKPS) {
177 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
178 /* Without this bit of weirdness moving up gives wildly high Y changes. */
179 packet[1] |= (packet[0] & 0x40) << 1;
180 }
181
182 /*
183 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first
184 * byte.
185 */
186 if (psmouse->type == PSMOUSE_CORTRON) {
187 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
188 packet[0] |= 0x08;
189 }
190
191 /*
192 * Generic PS/2 Mouse
193 */
194
195 input_report_key(dev, BTN_LEFT, packet[0] & 1);
196 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
197 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
198
199 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
200 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
201
202 input_sync(dev);
203
204 return PSMOUSE_FULL_PACKET;
205 }
206
207 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
208 unsigned long delay)
209 {
210 queue_delayed_work(kpsmoused_wq, work, delay);
211 }
212
213 /*
214 * __psmouse_set_state() sets new psmouse state and resets all flags.
215 */
216
217 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
218 {
219 psmouse->state = new_state;
220 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
221 psmouse->ps2dev.flags = 0;
222 psmouse->last = jiffies;
223 }
224
225
226 /*
227 * psmouse_set_state() sets new psmouse state and resets all flags and
228 * counters while holding serio lock so fighting with interrupt handler
229 * is not a concern.
230 */
231
232 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
233 {
234 serio_pause_rx(psmouse->ps2dev.serio);
235 __psmouse_set_state(psmouse, new_state);
236 serio_continue_rx(psmouse->ps2dev.serio);
237 }
238
239 /*
240 * psmouse_handle_byte() processes one byte of the input data stream
241 * by calling corresponding protocol handler.
242 */
243
244 static int psmouse_handle_byte(struct psmouse *psmouse)
245 {
246 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
247
248 switch (rc) {
249 case PSMOUSE_BAD_DATA:
250 if (psmouse->state == PSMOUSE_ACTIVATED) {
251 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
252 psmouse->name, psmouse->phys, psmouse->pktcnt);
253 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
254 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
255 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
256 serio_reconnect(psmouse->ps2dev.serio);
257 return -1;
258 }
259 }
260 psmouse->pktcnt = 0;
261 break;
262
263 case PSMOUSE_FULL_PACKET:
264 psmouse->pktcnt = 0;
265 if (psmouse->out_of_sync_cnt) {
266 psmouse->out_of_sync_cnt = 0;
267 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
268 psmouse->name, psmouse->phys);
269 }
270 break;
271
272 case PSMOUSE_GOOD_DATA:
273 break;
274 }
275 return 0;
276 }
277
278 /*
279 * psmouse_interrupt() handles incoming characters, either passing them
280 * for normal processing or gathering them as command response.
281 */
282
283 static irqreturn_t psmouse_interrupt(struct serio *serio,
284 unsigned char data, unsigned int flags)
285 {
286 struct psmouse *psmouse = serio_get_drvdata(serio);
287
288 if (psmouse->state == PSMOUSE_IGNORE)
289 goto out;
290
291 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
292 if (psmouse->state == PSMOUSE_ACTIVATED)
293 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
294 flags & SERIO_TIMEOUT ? " timeout" : "",
295 flags & SERIO_PARITY ? " bad parity" : "");
296 ps2_cmd_aborted(&psmouse->ps2dev);
297 goto out;
298 }
299
300 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
301 if (ps2_handle_ack(&psmouse->ps2dev, data))
302 goto out;
303
304 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
305 if (ps2_handle_response(&psmouse->ps2dev, data))
306 goto out;
307
308 if (psmouse->state <= PSMOUSE_RESYNCING)
309 goto out;
310
311 if (psmouse->state == PSMOUSE_ACTIVATED &&
312 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
313 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
314 psmouse->name, psmouse->phys, psmouse->pktcnt);
315 psmouse->badbyte = psmouse->packet[0];
316 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
317 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
318 goto out;
319 }
320
321 psmouse->packet[psmouse->pktcnt++] = data;
322 /*
323 * Check if this is a new device announcement (0xAA 0x00)
324 */
325 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
326 if (psmouse->pktcnt == 1) {
327 psmouse->last = jiffies;
328 goto out;
329 }
330
331 if (psmouse->packet[1] == PSMOUSE_RET_ID ||
332 (psmouse->type == PSMOUSE_HGPK &&
333 psmouse->packet[1] == PSMOUSE_RET_BAT)) {
334 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
335 serio_reconnect(serio);
336 goto out;
337 }
338 /*
339 * Not a new device, try processing first byte normally
340 */
341 psmouse->pktcnt = 1;
342 if (psmouse_handle_byte(psmouse))
343 goto out;
344
345 psmouse->packet[psmouse->pktcnt++] = data;
346 }
347
348 /*
349 * See if we need to force resync because mouse was idle for too long
350 */
351 if (psmouse->state == PSMOUSE_ACTIVATED &&
352 psmouse->pktcnt == 1 && psmouse->resync_time &&
353 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
354 psmouse->badbyte = psmouse->packet[0];
355 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
356 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
357 goto out;
358 }
359
360 psmouse->last = jiffies;
361 psmouse_handle_byte(psmouse);
362
363 out:
364 return IRQ_HANDLED;
365 }
366
367
368 /*
369 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
370 * using sliced syntax, understood by advanced devices, such as Logitech
371 * or Synaptics touchpads. The command is encoded as:
372 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
373 * is the command.
374 */
375 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
376 {
377 int i;
378
379 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
380 return -1;
381
382 for (i = 6; i >= 0; i -= 2) {
383 unsigned char d = (command >> i) & 3;
384 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
385 return -1;
386 }
387
388 return 0;
389 }
390
391
392 /*
393 * psmouse_reset() resets the mouse into power-on state.
394 */
395 int psmouse_reset(struct psmouse *psmouse)
396 {
397 unsigned char param[2];
398
399 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
400 return -1;
401
402 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
403 return -1;
404
405 return 0;
406 }
407
408
409 /*
410 * Genius NetMouse magic init.
411 */
412 static int genius_detect(struct psmouse *psmouse, bool set_properties)
413 {
414 struct ps2dev *ps2dev = &psmouse->ps2dev;
415 unsigned char param[4];
416
417 param[0] = 3;
418 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
419 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
420 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
421 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
422 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
423
424 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
425 return -1;
426
427 if (set_properties) {
428 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
429 __set_bit(BTN_SIDE, psmouse->dev->keybit);
430 __set_bit(REL_WHEEL, psmouse->dev->relbit);
431
432 psmouse->vendor = "Genius";
433 psmouse->name = "Mouse";
434 psmouse->pktsize = 4;
435 }
436
437 return 0;
438 }
439
440 /*
441 * IntelliMouse magic init.
442 */
443 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
444 {
445 struct ps2dev *ps2dev = &psmouse->ps2dev;
446 unsigned char param[2];
447
448 param[0] = 200;
449 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
450 param[0] = 100;
451 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
452 param[0] = 80;
453 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
454 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
455
456 if (param[0] != 3)
457 return -1;
458
459 if (set_properties) {
460 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
461 __set_bit(REL_WHEEL, psmouse->dev->relbit);
462
463 if (!psmouse->vendor) psmouse->vendor = "Generic";
464 if (!psmouse->name) psmouse->name = "Wheel Mouse";
465 psmouse->pktsize = 4;
466 }
467
468 return 0;
469 }
470
471 /*
472 * Try IntelliMouse/Explorer magic init.
473 */
474 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
475 {
476 struct ps2dev *ps2dev = &psmouse->ps2dev;
477 unsigned char param[2];
478
479 intellimouse_detect(psmouse, 0);
480
481 param[0] = 200;
482 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
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 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
488
489 if (param[0] != 4)
490 return -1;
491
492 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
493 param[0] = 200;
494 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
495 param[0] = 80;
496 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
497 param[0] = 40;
498 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
499
500 if (set_properties) {
501 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
502 __set_bit(REL_WHEEL, psmouse->dev->relbit);
503 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
504 __set_bit(BTN_SIDE, psmouse->dev->keybit);
505 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
506
507 if (!psmouse->vendor) psmouse->vendor = "Generic";
508 if (!psmouse->name) psmouse->name = "Explorer Mouse";
509 psmouse->pktsize = 4;
510 }
511
512 return 0;
513 }
514
515 /*
516 * Kensington ThinkingMouse / ExpertMouse magic init.
517 */
518 static int thinking_detect(struct psmouse *psmouse, bool set_properties)
519 {
520 struct ps2dev *ps2dev = &psmouse->ps2dev;
521 unsigned char param[2];
522 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
523 int i;
524
525 param[0] = 10;
526 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
527 param[0] = 0;
528 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
529 for (i = 0; i < ARRAY_SIZE(seq); i++) {
530 param[0] = seq[i];
531 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
532 }
533 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
534
535 if (param[0] != 2)
536 return -1;
537
538 if (set_properties) {
539 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
540
541 psmouse->vendor = "Kensington";
542 psmouse->name = "ThinkingMouse";
543 }
544
545 return 0;
546 }
547
548 /*
549 * Bare PS/2 protocol "detection". Always succeeds.
550 */
551 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
552 {
553 if (set_properties) {
554 if (!psmouse->vendor) psmouse->vendor = "Generic";
555 if (!psmouse->name) psmouse->name = "Mouse";
556 }
557
558 return 0;
559 }
560
561 /*
562 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
563 * must be forced by sysfs protocol writing.
564 */
565 static int cortron_detect(struct psmouse *psmouse, bool set_properties)
566 {
567 if (set_properties) {
568 psmouse->vendor = "Cortron";
569 psmouse->name = "PS/2 Trackball";
570 __set_bit(BTN_SIDE, psmouse->dev->keybit);
571 }
572
573 return 0;
574 }
575
576 /*
577 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
578 * the mouse may have.
579 */
580
581 static int psmouse_extensions(struct psmouse *psmouse,
582 unsigned int max_proto, bool set_properties)
583 {
584 bool synaptics_hardware = true;
585
586 /*
587 * We always check for lifebook because it does not disturb mouse
588 * (it only checks DMI information).
589 */
590 if (lifebook_detect(psmouse, set_properties) == 0) {
591 if (max_proto > PSMOUSE_IMEX) {
592 if (!set_properties || lifebook_init(psmouse) == 0)
593 return PSMOUSE_LIFEBOOK;
594 }
595 }
596
597 /*
598 * Try Kensington ThinkingMouse (we try first, because synaptics probe
599 * upsets the thinkingmouse).
600 */
601
602 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
603 return PSMOUSE_THINKPS;
604
605 /*
606 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol
607 * support is disabled in config - we need to know if it is synaptics so we
608 * can reset it properly after probing for intellimouse.
609 */
610 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
611 synaptics_hardware = true;
612
613 if (max_proto > PSMOUSE_IMEX) {
614 if (!set_properties || synaptics_init(psmouse) == 0)
615 return PSMOUSE_SYNAPTICS;
616 /*
617 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
618 * Unfortunately Logitech/Genius probes confuse some firmware versions so
619 * we'll have to skip them.
620 */
621 max_proto = PSMOUSE_IMEX;
622 }
623 /*
624 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
625 */
626 synaptics_reset(psmouse);
627 }
628
629 /*
630 * Try ALPS TouchPad
631 */
632 if (max_proto > PSMOUSE_IMEX) {
633 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
634 if (alps_detect(psmouse, set_properties) == 0) {
635 if (!set_properties || alps_init(psmouse) == 0)
636 return PSMOUSE_ALPS;
637 /*
638 * Init failed, try basic relative protocols
639 */
640 max_proto = PSMOUSE_IMEX;
641 }
642 }
643
644 /*
645 * Try OLPC HGPK touchpad.
646 */
647 if (max_proto > PSMOUSE_IMEX &&
648 hgpk_detect(psmouse, set_properties) == 0) {
649 if (!set_properties || hgpk_init(psmouse) == 0)
650 return PSMOUSE_HGPK;
651 /*
652 * Init failed, try basic relative protocols
653 */
654 max_proto = PSMOUSE_IMEX;
655 }
656
657 /*
658 * Try Elantech touchpad.
659 */
660 if (max_proto > PSMOUSE_IMEX &&
661 elantech_detect(psmouse, set_properties) == 0) {
662 if (!set_properties || elantech_init(psmouse) == 0)
663 return PSMOUSE_ELANTECH;
664 /*
665 * Init failed, try basic relative protocols
666 */
667 max_proto = PSMOUSE_IMEX;
668 }
669
670 /*
671 * Try Finger Sensing Pad
672 */
673 if (max_proto > PSMOUSE_IMEX) {
674 if (fsp_detect(psmouse, set_properties) == 0) {
675 if (!set_properties || fsp_init(psmouse) == 0)
676 return PSMOUSE_FSP;
677 /*
678 * Init failed, try basic relative protocols
679 */
680 max_proto = PSMOUSE_IMEX;
681 }
682 }
683
684 if (max_proto > PSMOUSE_IMEX) {
685 if (genius_detect(psmouse, set_properties) == 0)
686 return PSMOUSE_GENPS;
687
688 if (ps2pp_init(psmouse, set_properties) == 0)
689 return PSMOUSE_PS2PP;
690
691 if (trackpoint_detect(psmouse, set_properties) == 0)
692 return PSMOUSE_TRACKPOINT;
693
694 if (touchkit_ps2_detect(psmouse, set_properties) == 0)
695 return PSMOUSE_TOUCHKIT_PS2;
696 }
697
698 /*
699 * Reset to defaults in case the device got confused by extended
700 * protocol probes. Note that we follow up with full reset because
701 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
702 */
703 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
704 psmouse_reset(psmouse);
705
706 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
707 return PSMOUSE_IMEX;
708
709 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
710 return PSMOUSE_IMPS;
711
712 /*
713 * Okay, all failed, we have a standard mouse here. The number of the buttons
714 * is still a question, though. We assume 3.
715 */
716 ps2bare_detect(psmouse, set_properties);
717
718 if (synaptics_hardware) {
719 /*
720 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
721 * We need to reset the touchpad because if there is a track point on the
722 * pass through port it could get disabled while probing for protocol
723 * extensions.
724 */
725 psmouse_reset(psmouse);
726 }
727
728 return PSMOUSE_PS2;
729 }
730
731 static const struct psmouse_protocol psmouse_protocols[] = {
732 {
733 .type = PSMOUSE_PS2,
734 .name = "PS/2",
735 .alias = "bare",
736 .maxproto = true,
737 .detect = ps2bare_detect,
738 },
739 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
740 {
741 .type = PSMOUSE_PS2PP,
742 .name = "PS2++",
743 .alias = "logitech",
744 .detect = ps2pp_init,
745 },
746 #endif
747 {
748 .type = PSMOUSE_THINKPS,
749 .name = "ThinkPS/2",
750 .alias = "thinkps",
751 .detect = thinking_detect,
752 },
753 {
754 .type = PSMOUSE_GENPS,
755 .name = "GenPS/2",
756 .alias = "genius",
757 .detect = genius_detect,
758 },
759 {
760 .type = PSMOUSE_IMPS,
761 .name = "ImPS/2",
762 .alias = "imps",
763 .maxproto = true,
764 .detect = intellimouse_detect,
765 },
766 {
767 .type = PSMOUSE_IMEX,
768 .name = "ImExPS/2",
769 .alias = "exps",
770 .maxproto = true,
771 .detect = im_explorer_detect,
772 },
773 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
774 {
775 .type = PSMOUSE_SYNAPTICS,
776 .name = "SynPS/2",
777 .alias = "synaptics",
778 .detect = synaptics_detect,
779 .init = synaptics_init,
780 },
781 #endif
782 #ifdef CONFIG_MOUSE_PS2_ALPS
783 {
784 .type = PSMOUSE_ALPS,
785 .name = "AlpsPS/2",
786 .alias = "alps",
787 .detect = alps_detect,
788 .init = alps_init,
789 },
790 #endif
791 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
792 {
793 .type = PSMOUSE_LIFEBOOK,
794 .name = "LBPS/2",
795 .alias = "lifebook",
796 .init = lifebook_init,
797 },
798 #endif
799 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
800 {
801 .type = PSMOUSE_TRACKPOINT,
802 .name = "TPPS/2",
803 .alias = "trackpoint",
804 .detect = trackpoint_detect,
805 },
806 #endif
807 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
808 {
809 .type = PSMOUSE_TOUCHKIT_PS2,
810 .name = "touchkitPS/2",
811 .alias = "touchkit",
812 .detect = touchkit_ps2_detect,
813 },
814 #endif
815 #ifdef CONFIG_MOUSE_PS2_OLPC
816 {
817 .type = PSMOUSE_HGPK,
818 .name = "OLPC HGPK",
819 .alias = "hgpk",
820 .detect = hgpk_detect,
821 },
822 #endif
823 #ifdef CONFIG_MOUSE_PS2_ELANTECH
824 {
825 .type = PSMOUSE_ELANTECH,
826 .name = "ETPS/2",
827 .alias = "elantech",
828 .detect = elantech_detect,
829 .init = elantech_init,
830 },
831 #endif
832 #ifdef CONFIG_MOUSE_PS2_SENTELIC
833 {
834 .type = PSMOUSE_FSP,
835 .name = "FSPPS/2",
836 .alias = "fsp",
837 .detect = fsp_detect,
838 .init = fsp_init,
839 },
840 #endif
841 {
842 .type = PSMOUSE_CORTRON,
843 .name = "CortronPS/2",
844 .alias = "cortps",
845 .detect = cortron_detect,
846 },
847 {
848 .type = PSMOUSE_AUTO,
849 .name = "auto",
850 .alias = "any",
851 .maxproto = true,
852 },
853 };
854
855 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
856 {
857 int i;
858
859 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
860 if (psmouse_protocols[i].type == type)
861 return &psmouse_protocols[i];
862
863 WARN_ON(1);
864 return &psmouse_protocols[0];
865 }
866
867 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
868 {
869 const struct psmouse_protocol *p;
870 int i;
871
872 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
873 p = &psmouse_protocols[i];
874
875 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
876 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
877 return &psmouse_protocols[i];
878 }
879
880 return NULL;
881 }
882
883
884 /*
885 * psmouse_probe() probes for a PS/2 mouse.
886 */
887
888 static int psmouse_probe(struct psmouse *psmouse)
889 {
890 struct ps2dev *ps2dev = &psmouse->ps2dev;
891 unsigned char param[2];
892
893 /*
894 * First, we check if it's a mouse. It should send 0x00 or 0x03
895 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
896 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
897 * ID queries, probably due to a firmware bug.
898 */
899
900 param[0] = 0xa5;
901 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
902 return -1;
903
904 if (param[0] != 0x00 && param[0] != 0x03 &&
905 param[0] != 0x04 && param[0] != 0xff)
906 return -1;
907
908 /*
909 * Then we reset and disable the mouse so that it doesn't generate events.
910 */
911
912 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
913 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
914
915 return 0;
916 }
917
918 /*
919 * Here we set the mouse resolution.
920 */
921
922 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
923 {
924 static const unsigned char params[] = { 0, 1, 2, 2, 3 };
925 unsigned char p;
926
927 if (resolution == 0 || resolution > 200)
928 resolution = 200;
929
930 p = params[resolution / 50];
931 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
932 psmouse->resolution = 25 << p;
933 }
934
935 /*
936 * Here we set the mouse report rate.
937 */
938
939 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
940 {
941 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
942 unsigned char r;
943 int i = 0;
944
945 while (rates[i] > rate) i++;
946 r = rates[i];
947 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
948 psmouse->rate = r;
949 }
950
951 /*
952 * psmouse_initialize() initializes the mouse to a sane state.
953 */
954
955 static void psmouse_initialize(struct psmouse *psmouse)
956 {
957 /*
958 * We set the mouse report rate, resolution and scaling.
959 */
960
961 if (psmouse_max_proto != PSMOUSE_PS2) {
962 psmouse->set_rate(psmouse, psmouse->rate);
963 psmouse->set_resolution(psmouse, psmouse->resolution);
964 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
965 }
966 }
967
968 /*
969 * psmouse_activate() enables the mouse so that we get motion reports from it.
970 */
971
972 static void psmouse_activate(struct psmouse *psmouse)
973 {
974 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
975 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
976 psmouse->ps2dev.serio->phys);
977
978 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
979 }
980
981
982 /*
983 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
984 * reports from it unless we explicitly request it.
985 */
986
987 static void psmouse_deactivate(struct psmouse *psmouse)
988 {
989 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
990 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
991 psmouse->ps2dev.serio->phys);
992
993 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
994 }
995
996 /*
997 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
998 */
999
1000 static int psmouse_poll(struct psmouse *psmouse)
1001 {
1002 return ps2_command(&psmouse->ps2dev, psmouse->packet,
1003 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
1004 }
1005
1006
1007 /*
1008 * psmouse_resync() attempts to re-validate current protocol.
1009 */
1010
1011 static void psmouse_resync(struct work_struct *work)
1012 {
1013 struct psmouse *parent = NULL, *psmouse =
1014 container_of(work, struct psmouse, resync_work.work);
1015 struct serio *serio = psmouse->ps2dev.serio;
1016 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1017 bool failed = false, enabled = false;
1018 int i;
1019
1020 mutex_lock(&psmouse_mutex);
1021
1022 if (psmouse->state != PSMOUSE_RESYNCING)
1023 goto out;
1024
1025 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1026 parent = serio_get_drvdata(serio->parent);
1027 psmouse_deactivate(parent);
1028 }
1029
1030 /*
1031 * Some mice don't ACK commands sent while they are in the middle of
1032 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1033 * instead of ps2_command() which would wait for 200ms for an ACK
1034 * that may never come.
1035 * As an additional quirk ALPS touchpads may not only forget to ACK
1036 * disable command but will stop reporting taps, so if we see that
1037 * mouse at least once ACKs disable we will do full reconnect if ACK
1038 * is missing.
1039 */
1040 psmouse->num_resyncs++;
1041
1042 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1043 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1044 failed = true;
1045 } else
1046 psmouse->acks_disable_command = true;
1047
1048 /*
1049 * Poll the mouse. If it was reset the packet will be shorter than
1050 * psmouse->pktsize and ps2_command will fail. We do not expect and
1051 * do not handle scenario when mouse "upgrades" its protocol while
1052 * disconnected since it would require additional delay. If we ever
1053 * see a mouse that does it we'll adjust the code.
1054 */
1055 if (!failed) {
1056 if (psmouse->poll(psmouse))
1057 failed = true;
1058 else {
1059 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1060 for (i = 0; i < psmouse->pktsize; i++) {
1061 psmouse->pktcnt++;
1062 rc = psmouse->protocol_handler(psmouse);
1063 if (rc != PSMOUSE_GOOD_DATA)
1064 break;
1065 }
1066 if (rc != PSMOUSE_FULL_PACKET)
1067 failed = true;
1068 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1069 }
1070 }
1071 /*
1072 * Now try to enable mouse. We try to do that even if poll failed and also
1073 * repeat our attempts 5 times, otherwise we may be left out with disabled
1074 * mouse.
1075 */
1076 for (i = 0; i < 5; i++) {
1077 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1078 enabled = true;
1079 break;
1080 }
1081 msleep(200);
1082 }
1083
1084 if (!enabled) {
1085 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n",
1086 psmouse->ps2dev.serio->phys);
1087 failed = true;
1088 }
1089
1090 if (failed) {
1091 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1092 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n");
1093 serio_reconnect(serio);
1094 } else
1095 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1096
1097 if (parent)
1098 psmouse_activate(parent);
1099 out:
1100 mutex_unlock(&psmouse_mutex);
1101 }
1102
1103 /*
1104 * psmouse_cleanup() resets the mouse into power-on state.
1105 */
1106
1107 static void psmouse_cleanup(struct serio *serio)
1108 {
1109 struct psmouse *psmouse = serio_get_drvdata(serio);
1110 struct psmouse *parent = NULL;
1111
1112 mutex_lock(&psmouse_mutex);
1113
1114 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1115 parent = serio_get_drvdata(serio->parent);
1116 psmouse_deactivate(parent);
1117 }
1118
1119 psmouse_deactivate(psmouse);
1120
1121 if (psmouse->cleanup)
1122 psmouse->cleanup(psmouse);
1123
1124 psmouse_reset(psmouse);
1125
1126 /*
1127 * Some boxes, such as HP nx7400, get terribly confused if mouse
1128 * is not fully enabled before suspending/shutting down.
1129 */
1130 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1131
1132 if (parent) {
1133 if (parent->pt_deactivate)
1134 parent->pt_deactivate(parent);
1135
1136 psmouse_activate(parent);
1137 }
1138
1139 mutex_unlock(&psmouse_mutex);
1140 }
1141
1142 /*
1143 * psmouse_disconnect() closes and frees.
1144 */
1145
1146 static void psmouse_disconnect(struct serio *serio)
1147 {
1148 struct psmouse *psmouse, *parent = NULL;
1149
1150 psmouse = serio_get_drvdata(serio);
1151
1152 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1153
1154 mutex_lock(&psmouse_mutex);
1155
1156 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1157
1158 /* make sure we don't have a resync in progress */
1159 mutex_unlock(&psmouse_mutex);
1160 flush_workqueue(kpsmoused_wq);
1161 mutex_lock(&psmouse_mutex);
1162
1163 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1164 parent = serio_get_drvdata(serio->parent);
1165 psmouse_deactivate(parent);
1166 }
1167
1168 if (psmouse->disconnect)
1169 psmouse->disconnect(psmouse);
1170
1171 if (parent && parent->pt_deactivate)
1172 parent->pt_deactivate(parent);
1173
1174 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1175
1176 serio_close(serio);
1177 serio_set_drvdata(serio, NULL);
1178 input_unregister_device(psmouse->dev);
1179 kfree(psmouse);
1180
1181 if (parent)
1182 psmouse_activate(parent);
1183
1184 mutex_unlock(&psmouse_mutex);
1185 }
1186
1187 static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto)
1188 {
1189 struct input_dev *input_dev = psmouse->dev;
1190
1191 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1192
1193 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
1194 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
1195 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
1196 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
1197
1198 psmouse->set_rate = psmouse_set_rate;
1199 psmouse->set_resolution = psmouse_set_resolution;
1200 psmouse->poll = psmouse_poll;
1201 psmouse->protocol_handler = psmouse_process_byte;
1202 psmouse->pktsize = 3;
1203
1204 if (proto && (proto->detect || proto->init)) {
1205 if (proto->detect && proto->detect(psmouse, 1) < 0)
1206 return -1;
1207
1208 if (proto->init && proto->init(psmouse) < 0)
1209 return -1;
1210
1211 psmouse->type = proto->type;
1212 }
1213 else
1214 psmouse->type = psmouse_extensions(psmouse,
1215 psmouse_max_proto, true);
1216
1217 /*
1218 * If mouse's packet size is 3 there is no point in polling the
1219 * device in hopes to detect protocol reset - we won't get less
1220 * than 3 bytes response anyhow.
1221 */
1222 if (psmouse->pktsize == 3)
1223 psmouse->resync_time = 0;
1224
1225 /*
1226 * Some smart KVMs fake response to POLL command returning just
1227 * 3 bytes and messing up our resync logic, so if initial poll
1228 * fails we won't try polling the device anymore. Hopefully
1229 * such KVM will maintain initially selected protocol.
1230 */
1231 if (psmouse->resync_time && psmouse->poll(psmouse))
1232 psmouse->resync_time = 0;
1233
1234 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1235 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
1236
1237 input_dev->name = psmouse->devname;
1238 input_dev->phys = psmouse->phys;
1239 input_dev->id.bustype = BUS_I8042;
1240 input_dev->id.vendor = 0x0002;
1241 input_dev->id.product = psmouse->type;
1242 input_dev->id.version = psmouse->model;
1243
1244 return 0;
1245 }
1246
1247 /*
1248 * psmouse_connect() is a callback from the serio module when
1249 * an unhandled serio port is found.
1250 */
1251 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1252 {
1253 struct psmouse *psmouse, *parent = NULL;
1254 struct input_dev *input_dev;
1255 int retval = 0, error = -ENOMEM;
1256
1257 mutex_lock(&psmouse_mutex);
1258
1259 /*
1260 * If this is a pass-through port deactivate parent so the device
1261 * connected to this port can be successfully identified
1262 */
1263 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1264 parent = serio_get_drvdata(serio->parent);
1265 psmouse_deactivate(parent);
1266 }
1267
1268 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1269 input_dev = input_allocate_device();
1270 if (!psmouse || !input_dev)
1271 goto err_free;
1272
1273 ps2_init(&psmouse->ps2dev, serio);
1274 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1275 psmouse->dev = input_dev;
1276 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1277
1278 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1279
1280 serio_set_drvdata(serio, psmouse);
1281
1282 error = serio_open(serio, drv);
1283 if (error)
1284 goto err_clear_drvdata;
1285
1286 if (psmouse_probe(psmouse) < 0) {
1287 error = -ENODEV;
1288 goto err_close_serio;
1289 }
1290
1291 psmouse->rate = psmouse_rate;
1292 psmouse->resolution = psmouse_resolution;
1293 psmouse->resetafter = psmouse_resetafter;
1294 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1295 psmouse->smartscroll = psmouse_smartscroll;
1296
1297 psmouse_switch_protocol(psmouse, NULL);
1298
1299 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1300 psmouse_initialize(psmouse);
1301
1302 error = input_register_device(psmouse->dev);
1303 if (error)
1304 goto err_protocol_disconnect;
1305
1306 if (parent && parent->pt_activate)
1307 parent->pt_activate(parent);
1308
1309 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1310 if (error)
1311 goto err_pt_deactivate;
1312
1313 psmouse_activate(psmouse);
1314
1315 out:
1316 /* If this is a pass-through port the parent needs to be re-activated */
1317 if (parent)
1318 psmouse_activate(parent);
1319
1320 mutex_unlock(&psmouse_mutex);
1321 return retval;
1322
1323 err_pt_deactivate:
1324 if (parent && parent->pt_deactivate)
1325 parent->pt_deactivate(parent);
1326 input_unregister_device(psmouse->dev);
1327 input_dev = NULL; /* so we don't try to free it below */
1328 err_protocol_disconnect:
1329 if (psmouse->disconnect)
1330 psmouse->disconnect(psmouse);
1331 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1332 err_close_serio:
1333 serio_close(serio);
1334 err_clear_drvdata:
1335 serio_set_drvdata(serio, NULL);
1336 err_free:
1337 input_free_device(input_dev);
1338 kfree(psmouse);
1339
1340 retval = error;
1341 goto out;
1342 }
1343
1344
1345 static int psmouse_reconnect(struct serio *serio)
1346 {
1347 struct psmouse *psmouse = serio_get_drvdata(serio);
1348 struct psmouse *parent = NULL;
1349 struct serio_driver *drv = serio->drv;
1350 int rc = -1;
1351
1352 if (!drv || !psmouse) {
1353 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
1354 return -1;
1355 }
1356
1357 mutex_lock(&psmouse_mutex);
1358
1359 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1360 parent = serio_get_drvdata(serio->parent);
1361 psmouse_deactivate(parent);
1362 }
1363
1364 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1365
1366 if (psmouse->reconnect) {
1367 if (psmouse->reconnect(psmouse))
1368 goto out;
1369 } else if (psmouse_probe(psmouse) < 0 ||
1370 psmouse->type != psmouse_extensions(psmouse,
1371 psmouse_max_proto, false)) {
1372 goto out;
1373 }
1374
1375 /* ok, the device type (and capabilities) match the old one,
1376 * we can continue using it, complete intialization
1377 */
1378 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1379
1380 psmouse_initialize(psmouse);
1381
1382 if (parent && parent->pt_activate)
1383 parent->pt_activate(parent);
1384
1385 psmouse_activate(psmouse);
1386 rc = 0;
1387
1388 out:
1389 /* If this is a pass-through port the parent waits to be activated */
1390 if (parent)
1391 psmouse_activate(parent);
1392
1393 mutex_unlock(&psmouse_mutex);
1394 return rc;
1395 }
1396
1397 static struct serio_device_id psmouse_serio_ids[] = {
1398 {
1399 .type = SERIO_8042,
1400 .proto = SERIO_ANY,
1401 .id = SERIO_ANY,
1402 .extra = SERIO_ANY,
1403 },
1404 {
1405 .type = SERIO_PS_PSTHRU,
1406 .proto = SERIO_ANY,
1407 .id = SERIO_ANY,
1408 .extra = SERIO_ANY,
1409 },
1410 { 0 }
1411 };
1412
1413 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1414
1415 static struct serio_driver psmouse_drv = {
1416 .driver = {
1417 .name = "psmouse",
1418 },
1419 .description = DRIVER_DESC,
1420 .id_table = psmouse_serio_ids,
1421 .interrupt = psmouse_interrupt,
1422 .connect = psmouse_connect,
1423 .reconnect = psmouse_reconnect,
1424 .disconnect = psmouse_disconnect,
1425 .cleanup = psmouse_cleanup,
1426 };
1427
1428 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1429 char *buf)
1430 {
1431 struct serio *serio = to_serio_port(dev);
1432 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1433 struct psmouse *psmouse;
1434 int retval;
1435
1436 retval = serio_pin_driver(serio);
1437 if (retval)
1438 return retval;
1439
1440 if (serio->drv != &psmouse_drv) {
1441 retval = -ENODEV;
1442 goto out;
1443 }
1444
1445 psmouse = serio_get_drvdata(serio);
1446
1447 retval = attr->show(psmouse, attr->data, buf);
1448
1449 out:
1450 serio_unpin_driver(serio);
1451 return retval;
1452 }
1453
1454 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1455 const char *buf, size_t count)
1456 {
1457 struct serio *serio = to_serio_port(dev);
1458 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1459 struct psmouse *psmouse, *parent = NULL;
1460 int retval;
1461
1462 retval = serio_pin_driver(serio);
1463 if (retval)
1464 return retval;
1465
1466 if (serio->drv != &psmouse_drv) {
1467 retval = -ENODEV;
1468 goto out_unpin;
1469 }
1470
1471 retval = mutex_lock_interruptible(&psmouse_mutex);
1472 if (retval)
1473 goto out_unpin;
1474
1475 psmouse = serio_get_drvdata(serio);
1476
1477 if (attr->protect) {
1478 if (psmouse->state == PSMOUSE_IGNORE) {
1479 retval = -ENODEV;
1480 goto out_unlock;
1481 }
1482
1483 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1484 parent = serio_get_drvdata(serio->parent);
1485 psmouse_deactivate(parent);
1486 }
1487
1488 psmouse_deactivate(psmouse);
1489 }
1490
1491 retval = attr->set(psmouse, attr->data, buf, count);
1492
1493 if (attr->protect) {
1494 if (retval != -ENODEV)
1495 psmouse_activate(psmouse);
1496
1497 if (parent)
1498 psmouse_activate(parent);
1499 }
1500
1501 out_unlock:
1502 mutex_unlock(&psmouse_mutex);
1503 out_unpin:
1504 serio_unpin_driver(serio);
1505 return retval;
1506 }
1507
1508 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1509 {
1510 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1511
1512 return sprintf(buf, "%u\n", *field);
1513 }
1514
1515 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1516 {
1517 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1518 unsigned long value;
1519
1520 if (strict_strtoul(buf, 10, &value))
1521 return -EINVAL;
1522
1523 if ((unsigned int)value != value)
1524 return -EINVAL;
1525
1526 *field = value;
1527
1528 return count;
1529 }
1530
1531 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1532 {
1533 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1534 }
1535
1536 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1537 {
1538 struct serio *serio = psmouse->ps2dev.serio;
1539 struct psmouse *parent = NULL;
1540 struct input_dev *old_dev, *new_dev;
1541 const struct psmouse_protocol *proto, *old_proto;
1542 int error;
1543 int retry = 0;
1544
1545 proto = psmouse_protocol_by_name(buf, count);
1546 if (!proto)
1547 return -EINVAL;
1548
1549 if (psmouse->type == proto->type)
1550 return count;
1551
1552 new_dev = input_allocate_device();
1553 if (!new_dev)
1554 return -ENOMEM;
1555
1556 while (serio->child) {
1557 if (++retry > 3) {
1558 printk(KERN_WARNING
1559 "psmouse: failed to destroy child port, "
1560 "protocol change aborted.\n");
1561 input_free_device(new_dev);
1562 return -EIO;
1563 }
1564
1565 mutex_unlock(&psmouse_mutex);
1566 serio_unpin_driver(serio);
1567 serio_unregister_child_port(serio);
1568 serio_pin_driver_uninterruptible(serio);
1569 mutex_lock(&psmouse_mutex);
1570
1571 if (serio->drv != &psmouse_drv) {
1572 input_free_device(new_dev);
1573 return -ENODEV;
1574 }
1575
1576 if (psmouse->type == proto->type) {
1577 input_free_device(new_dev);
1578 return count; /* switched by other thread */
1579 }
1580 }
1581
1582 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1583 parent = serio_get_drvdata(serio->parent);
1584 if (parent->pt_deactivate)
1585 parent->pt_deactivate(parent);
1586 }
1587
1588 old_dev = psmouse->dev;
1589 old_proto = psmouse_protocol_by_type(psmouse->type);
1590
1591 if (psmouse->disconnect)
1592 psmouse->disconnect(psmouse);
1593
1594 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1595
1596 psmouse->dev = new_dev;
1597 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1598
1599 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1600 psmouse_reset(psmouse);
1601 /* default to PSMOUSE_PS2 */
1602 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1603 }
1604
1605 psmouse_initialize(psmouse);
1606 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1607
1608 error = input_register_device(psmouse->dev);
1609 if (error) {
1610 if (psmouse->disconnect)
1611 psmouse->disconnect(psmouse);
1612
1613 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1614 input_free_device(new_dev);
1615 psmouse->dev = old_dev;
1616 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1617 psmouse_switch_protocol(psmouse, old_proto);
1618 psmouse_initialize(psmouse);
1619 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1620
1621 return error;
1622 }
1623
1624 input_unregister_device(old_dev);
1625
1626 if (parent && parent->pt_activate)
1627 parent->pt_activate(parent);
1628
1629 return count;
1630 }
1631
1632 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1633 {
1634 unsigned long value;
1635
1636 if (strict_strtoul(buf, 10, &value))
1637 return -EINVAL;
1638
1639 psmouse->set_rate(psmouse, value);
1640 return count;
1641 }
1642
1643 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1644 {
1645 unsigned long value;
1646
1647 if (strict_strtoul(buf, 10, &value))
1648 return -EINVAL;
1649
1650 psmouse->set_resolution(psmouse, value);
1651 return count;
1652 }
1653
1654
1655 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1656 {
1657 const struct psmouse_protocol *proto;
1658
1659 if (!val)
1660 return -EINVAL;
1661
1662 proto = psmouse_protocol_by_name(val, strlen(val));
1663
1664 if (!proto || !proto->maxproto)
1665 return -EINVAL;
1666
1667 *((unsigned int *)kp->arg) = proto->type;
1668
1669 return 0;
1670 }
1671
1672 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1673 {
1674 int type = *((unsigned int *)kp->arg);
1675
1676 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1677 }
1678
1679 static int __init psmouse_init(void)
1680 {
1681 int err;
1682
1683 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1684 if (!kpsmoused_wq) {
1685 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
1686 return -ENOMEM;
1687 }
1688
1689 err = serio_register_driver(&psmouse_drv);
1690 if (err)
1691 destroy_workqueue(kpsmoused_wq);
1692
1693 return err;
1694 }
1695
1696 static void __exit psmouse_exit(void)
1697 {
1698 serio_unregister_driver(&psmouse_drv);
1699 destroy_workqueue(kpsmoused_wq);
1700 }
1701
1702 module_init(psmouse_init);
1703 module_exit(psmouse_exit);
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