Input: mousedev - remap BTN_FORWARD from BTN_LEFT to BTN_MIDDLE
[linux-3.10.git] / drivers / input / mousedev.c
1 /*
2  * Input driver to ExplorerPS/2 device driver module.
3  *
4  * Copyright (c) 1999-2002 Vojtech Pavlik
5  * Copyright (c) 2004      Dmitry Torokhov
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as published by
9  * the Free Software Foundation.
10  */
11
12 #define MOUSEDEV_MINOR_BASE     32
13 #define MOUSEDEV_MINORS         32
14 #define MOUSEDEV_MIX            31
15
16 #include <linux/slab.h>
17 #include <linux/poll.h>
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/init.h>
21 #include <linux/input.h>
22 #include <linux/smp_lock.h>
23 #include <linux/random.h>
24 #include <linux/major.h>
25 #include <linux/device.h>
26 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
27 #include <linux/miscdevice.h>
28 #endif
29
30 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
31 MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces");
32 MODULE_LICENSE("GPL");
33
34 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X
35 #define CONFIG_INPUT_MOUSEDEV_SCREEN_X  1024
36 #endif
37 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y
38 #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y  768
39 #endif
40
41 static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X;
42 module_param(xres, uint, 0644);
43 MODULE_PARM_DESC(xres, "Horizontal screen resolution");
44
45 static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y;
46 module_param(yres, uint, 0644);
47 MODULE_PARM_DESC(yres, "Vertical screen resolution");
48
49 static unsigned tap_time = 200;
50 module_param(tap_time, uint, 0644);
51 MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)");
52
53 struct mousedev_hw_data {
54         int dx, dy, dz;
55         int x, y;
56         int abs_event;
57         unsigned long buttons;
58 };
59
60 struct mousedev {
61         int exist;
62         int open;
63         int minor;
64         char name[16];
65         wait_queue_head_t wait;
66         struct list_head list;
67         struct input_handle handle;
68
69         struct mousedev_hw_data packet;
70         unsigned int pkt_count;
71         int old_x[4], old_y[4];
72         int frac_dx, frac_dy;
73         unsigned long touch;
74 };
75
76 enum mousedev_emul {
77         MOUSEDEV_EMUL_PS2,
78         MOUSEDEV_EMUL_IMPS,
79         MOUSEDEV_EMUL_EXPS
80 };
81
82 struct mousedev_motion {
83         int dx, dy, dz;
84         unsigned long buttons;
85 };
86
87 #define PACKET_QUEUE_LEN        16
88 struct mousedev_list {
89         struct fasync_struct *fasync;
90         struct mousedev *mousedev;
91         struct list_head node;
92
93         struct mousedev_motion packets[PACKET_QUEUE_LEN];
94         unsigned int head, tail;
95         spinlock_t packet_lock;
96         int pos_x, pos_y;
97
98         signed char ps2[6];
99         unsigned char ready, buffer, bufsiz;
100         unsigned char imexseq, impsseq;
101         enum mousedev_emul mode;
102         unsigned long last_buttons;
103 };
104
105 #define MOUSEDEV_SEQ_LEN        6
106
107 static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 };
108 static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 };
109
110 static struct input_handler mousedev_handler;
111
112 static struct mousedev *mousedev_table[MOUSEDEV_MINORS];
113 static struct mousedev mousedev_mix;
114
115 #define fx(i)  (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
116 #define fy(i)  (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
117
118 static void mousedev_touchpad_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
119 {
120         int size, tmp;
121         enum { FRACTION_DENOM = 128 };
122
123         if (mousedev->touch) {
124                 size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
125                 if (size == 0)
126                         size = 256 * 2;
127
128                 switch (code) {
129                         case ABS_X:
130                                 fx(0) = value;
131                                 if (mousedev->pkt_count >= 2) {
132                                         tmp = ((value - fx(2)) * (256 * FRACTION_DENOM)) / size;
133                                         tmp += mousedev->frac_dx;
134                                         mousedev->packet.dx = tmp / FRACTION_DENOM;
135                                         mousedev->frac_dx = tmp - mousedev->packet.dx * FRACTION_DENOM;
136                                 }
137                                 break;
138
139                         case ABS_Y:
140                                 fy(0) = value;
141                                 if (mousedev->pkt_count >= 2) {
142                                         tmp = -((value - fy(2)) * (256 * FRACTION_DENOM)) / size;
143                                         tmp += mousedev->frac_dy;
144                                         mousedev->packet.dy = tmp / FRACTION_DENOM;
145                                         mousedev->frac_dy = tmp - mousedev->packet.dy * FRACTION_DENOM;
146                                 }
147                                 break;
148                 }
149         }
150 }
151
152 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
153 {
154         int size;
155
156         switch (code) {
157                 case ABS_X:
158                         size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
159                         if (size == 0)
160                                 size = xres ? : 1;
161                         if (value > dev->absmax[ABS_X])
162                                 value = dev->absmax[ABS_X];
163                         if (value < dev->absmin[ABS_X])
164                                 value = dev->absmin[ABS_X];
165                         mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size;
166                         mousedev->packet.abs_event = 1;
167                         break;
168
169                 case ABS_Y:
170                         size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y];
171                         if (size == 0)
172                                 size = yres ? : 1;
173                         if (value > dev->absmax[ABS_Y])
174                                 value = dev->absmax[ABS_Y];
175                         if (value < dev->absmin[ABS_Y])
176                                 value = dev->absmin[ABS_Y];
177                         mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size;
178                         mousedev->packet.abs_event = 1;
179                         break;
180         }
181 }
182
183 static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value)
184 {
185         switch (code) {
186                 case REL_X:     mousedev->packet.dx += value; break;
187                 case REL_Y:     mousedev->packet.dy -= value; break;
188                 case REL_WHEEL: mousedev->packet.dz -= value; break;
189         }
190 }
191
192 static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value)
193 {
194         int index;
195
196         switch (code) {
197                 case BTN_TOUCH:
198                 case BTN_0:
199                 case BTN_LEFT:          index = 0; break;
200                 case BTN_STYLUS:
201                 case BTN_1:
202                 case BTN_RIGHT:         index = 1; break;
203                 case BTN_2:
204                 case BTN_FORWARD:
205                 case BTN_STYLUS2:
206                 case BTN_MIDDLE:        index = 2; break;
207                 case BTN_3:
208                 case BTN_BACK:
209                 case BTN_SIDE:          index = 3; break;
210                 case BTN_4:
211                 case BTN_EXTRA:         index = 4; break;
212                 default:                return;
213         }
214
215         if (value) {
216                 set_bit(index, &mousedev->packet.buttons);
217                 set_bit(index, &mousedev_mix.packet.buttons);
218         } else {
219                 clear_bit(index, &mousedev->packet.buttons);
220                 clear_bit(index, &mousedev_mix.packet.buttons);
221         }
222 }
223
224 static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet)
225 {
226         struct mousedev_list *list;
227         struct mousedev_motion *p;
228         unsigned long flags;
229         int wake_readers = 0;
230
231         list_for_each_entry(list, &mousedev->list, node) {
232                 spin_lock_irqsave(&list->packet_lock, flags);
233
234                 p = &list->packets[list->head];
235                 if (list->ready && p->buttons != mousedev->packet.buttons) {
236                         unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN;
237                         if (new_head != list->tail) {
238                                 p = &list->packets[list->head = new_head];
239                                 memset(p, 0, sizeof(struct mousedev_motion));
240                         }
241                 }
242
243                 if (packet->abs_event) {
244                         p->dx += packet->x - list->pos_x;
245                         p->dy += packet->y - list->pos_y;
246                         list->pos_x = packet->x;
247                         list->pos_y = packet->y;
248                 }
249
250                 list->pos_x += packet->dx;
251                 list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x);
252                 list->pos_y += packet->dy;
253                 list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y);
254
255                 p->dx += packet->dx;
256                 p->dy += packet->dy;
257                 p->dz += packet->dz;
258                 p->buttons = mousedev->packet.buttons;
259
260                 if (p->dx || p->dy || p->dz || p->buttons != list->last_buttons)
261                         list->ready = 1;
262
263                 spin_unlock_irqrestore(&list->packet_lock, flags);
264
265                 if (list->ready) {
266                         kill_fasync(&list->fasync, SIGIO, POLL_IN);
267                         wake_readers = 1;
268                 }
269         }
270
271         if (wake_readers)
272                 wake_up_interruptible(&mousedev->wait);
273 }
274
275 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
276 {
277         if (!value) {
278                 if (mousedev->touch &&
279                     time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) {
280                         /*
281                          * Toggle left button to emulate tap.
282                          * We rely on the fact that mousedev_mix always has 0
283                          * motion packet so we won't mess current position.
284                          */
285                         set_bit(0, &mousedev->packet.buttons);
286                         set_bit(0, &mousedev_mix.packet.buttons);
287                         mousedev_notify_readers(mousedev, &mousedev_mix.packet);
288                         mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet);
289                         clear_bit(0, &mousedev->packet.buttons);
290                         clear_bit(0, &mousedev_mix.packet.buttons);
291                 }
292                 mousedev->touch = mousedev->pkt_count = 0;
293                 mousedev->frac_dx = 0;
294                 mousedev->frac_dy = 0;
295
296         } else if (!mousedev->touch)
297                 mousedev->touch = jiffies;
298 }
299
300 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
301 {
302         struct mousedev *mousedev = handle->private;
303
304         switch (type) {
305                 case EV_ABS:
306                         /* Ignore joysticks */
307                         if (test_bit(BTN_TRIGGER, handle->dev->keybit))
308                                 return;
309
310                         if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
311                                 mousedev_touchpad_event(handle->dev, mousedev, code, value);
312                         else
313                                 mousedev_abs_event(handle->dev, mousedev, code, value);
314
315                         break;
316
317                 case EV_REL:
318                         mousedev_rel_event(mousedev, code, value);
319                         break;
320
321                 case EV_KEY:
322                         if (value != 2) {
323                                 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
324                                         mousedev_touchpad_touch(mousedev, value);
325                                 else
326                                         mousedev_key_event(mousedev, code, value);
327                         }
328                         break;
329
330                 case EV_SYN:
331                         if (code == SYN_REPORT) {
332                                 if (mousedev->touch) {
333                                         mousedev->pkt_count++;
334                                         /* Input system eats duplicate events, but we need all of them
335                                          * to do correct averaging so apply present one forward
336                                          */
337                                         fx(0) = fx(1);
338                                         fy(0) = fy(1);
339                                 }
340
341                                 mousedev_notify_readers(mousedev, &mousedev->packet);
342                                 mousedev_notify_readers(&mousedev_mix, &mousedev->packet);
343
344                                 mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0;
345                                 mousedev->packet.abs_event = 0;
346                         }
347                         break;
348         }
349 }
350
351 static int mousedev_fasync(int fd, struct file *file, int on)
352 {
353         int retval;
354         struct mousedev_list *list = file->private_data;
355
356         retval = fasync_helper(fd, file, on, &list->fasync);
357
358         return retval < 0 ? retval : 0;
359 }
360
361 static void mousedev_free(struct mousedev *mousedev)
362 {
363         mousedev_table[mousedev->minor] = NULL;
364         kfree(mousedev);
365 }
366
367 static void mixdev_release(void)
368 {
369         struct input_handle *handle;
370
371         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
372                 struct mousedev *mousedev = handle->private;
373
374                 if (!mousedev->open) {
375                         if (mousedev->exist)
376                                 input_close_device(&mousedev->handle);
377                         else
378                                 mousedev_free(mousedev);
379                 }
380         }
381 }
382
383 static int mousedev_release(struct inode * inode, struct file * file)
384 {
385         struct mousedev_list *list = file->private_data;
386
387         mousedev_fasync(-1, file, 0);
388
389         list_del(&list->node);
390
391         if (!--list->mousedev->open) {
392                 if (list->mousedev->minor == MOUSEDEV_MIX)
393                         mixdev_release();
394                 else if (!mousedev_mix.open) {
395                         if (list->mousedev->exist)
396                                 input_close_device(&list->mousedev->handle);
397                         else
398                                 mousedev_free(list->mousedev);
399                 }
400         }
401
402         kfree(list);
403         return 0;
404 }
405
406 static int mousedev_open(struct inode * inode, struct file * file)
407 {
408         struct mousedev_list *list;
409         struct input_handle *handle;
410         struct mousedev *mousedev;
411         int i;
412
413 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
414         if (imajor(inode) == MISC_MAJOR)
415                 i = MOUSEDEV_MIX;
416         else
417 #endif
418                 i = iminor(inode) - MOUSEDEV_MINOR_BASE;
419
420         if (i >= MOUSEDEV_MINORS || !mousedev_table[i])
421                 return -ENODEV;
422
423         if (!(list = kzalloc(sizeof(struct mousedev_list), GFP_KERNEL)))
424                 return -ENOMEM;
425
426         spin_lock_init(&list->packet_lock);
427         list->pos_x = xres / 2;
428         list->pos_y = yres / 2;
429         list->mousedev = mousedev_table[i];
430         list_add_tail(&list->node, &mousedev_table[i]->list);
431         file->private_data = list;
432
433         if (!list->mousedev->open++) {
434                 if (list->mousedev->minor == MOUSEDEV_MIX) {
435                         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
436                                 mousedev = handle->private;
437                                 if (!mousedev->open && mousedev->exist)
438                                         input_open_device(handle);
439                         }
440                 } else
441                         if (!mousedev_mix.open && list->mousedev->exist)
442                                 input_open_device(&list->mousedev->handle);
443         }
444
445         return 0;
446 }
447
448 static inline int mousedev_limit_delta(int delta, int limit)
449 {
450         return delta > limit ? limit : (delta < -limit ? -limit : delta);
451 }
452
453 static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
454 {
455         struct mousedev_motion *p;
456         unsigned long flags;
457
458         spin_lock_irqsave(&list->packet_lock, flags);
459         p = &list->packets[list->tail];
460
461         ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
462         ps2_data[1] = mousedev_limit_delta(p->dx, 127);
463         ps2_data[2] = mousedev_limit_delta(p->dy, 127);
464         p->dx -= ps2_data[1];
465         p->dy -= ps2_data[2];
466
467         switch (list->mode) {
468                 case MOUSEDEV_EMUL_EXPS:
469                         ps2_data[3] = mousedev_limit_delta(p->dz, 7);
470                         p->dz -= ps2_data[3];
471                         ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
472                         list->bufsiz = 4;
473                         break;
474
475                 case MOUSEDEV_EMUL_IMPS:
476                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
477                         ps2_data[3] = mousedev_limit_delta(p->dz, 127);
478                         p->dz -= ps2_data[3];
479                         list->bufsiz = 4;
480                         break;
481
482                 case MOUSEDEV_EMUL_PS2:
483                 default:
484                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
485                         p->dz = 0;
486                         list->bufsiz = 3;
487                         break;
488         }
489
490         if (!p->dx && !p->dy && !p->dz) {
491                 if (list->tail == list->head) {
492                         list->ready = 0;
493                         list->last_buttons = p->buttons;
494                 } else
495                         list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
496         }
497
498         spin_unlock_irqrestore(&list->packet_lock, flags);
499 }
500
501
502 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
503 {
504         struct mousedev_list *list = file->private_data;
505         unsigned char c;
506         unsigned int i;
507
508         for (i = 0; i < count; i++) {
509
510                 if (get_user(c, buffer + i))
511                         return -EFAULT;
512
513                 if (c == mousedev_imex_seq[list->imexseq]) {
514                         if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
515                                 list->imexseq = 0;
516                                 list->mode = MOUSEDEV_EMUL_EXPS;
517                         }
518                 } else
519                         list->imexseq = 0;
520
521                 if (c == mousedev_imps_seq[list->impsseq]) {
522                         if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
523                                 list->impsseq = 0;
524                                 list->mode = MOUSEDEV_EMUL_IMPS;
525                         }
526                 } else
527                         list->impsseq = 0;
528
529                 list->ps2[0] = 0xfa;
530
531                 switch (c) {
532
533                         case 0xeb: /* Poll */
534                                 mousedev_packet(list, &list->ps2[1]);
535                                 list->bufsiz++; /* account for leading ACK */
536                                 break;
537
538                         case 0xf2: /* Get ID */
539                                 switch (list->mode) {
540                                         case MOUSEDEV_EMUL_PS2:  list->ps2[1] = 0; break;
541                                         case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break;
542                                         case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break;
543                                 }
544                                 list->bufsiz = 2;
545                                 break;
546
547                         case 0xe9: /* Get info */
548                                 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200;
549                                 list->bufsiz = 4;
550                                 break;
551
552                         case 0xff: /* Reset */
553                                 list->impsseq = list->imexseq = 0;
554                                 list->mode = MOUSEDEV_EMUL_PS2;
555                                 list->ps2[1] = 0xaa; list->ps2[2] = 0x00;
556                                 list->bufsiz = 3;
557                                 break;
558
559                         default:
560                                 list->bufsiz = 1;
561                                 break;
562                 }
563
564                 list->buffer = list->bufsiz;
565         }
566
567         kill_fasync(&list->fasync, SIGIO, POLL_IN);
568
569         wake_up_interruptible(&list->mousedev->wait);
570
571         return count;
572 }
573
574 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
575 {
576         struct mousedev_list *list = file->private_data;
577         int retval = 0;
578
579         if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
580                 return -EAGAIN;
581
582         retval = wait_event_interruptible(list->mousedev->wait,
583                                           !list->mousedev->exist || list->ready || list->buffer);
584
585         if (retval)
586                 return retval;
587
588         if (!list->mousedev->exist)
589                 return -ENODEV;
590
591         if (!list->buffer && list->ready) {
592                 mousedev_packet(list, list->ps2);
593                 list->buffer = list->bufsiz;
594         }
595
596         if (count > list->buffer)
597                 count = list->buffer;
598
599         list->buffer -= count;
600
601         if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count))
602                 return -EFAULT;
603
604         return count;
605 }
606
607 /* No kernel lock - fine */
608 static unsigned int mousedev_poll(struct file *file, poll_table *wait)
609 {
610         struct mousedev_list *list = file->private_data;
611
612         poll_wait(file, &list->mousedev->wait, wait);
613         return ((list->ready || list->buffer) ? (POLLIN | POLLRDNORM) : 0) |
614                 (list->mousedev->exist ? 0 : (POLLHUP | POLLERR));
615 }
616
617 static const struct file_operations mousedev_fops = {
618         .owner =        THIS_MODULE,
619         .read =         mousedev_read,
620         .write =        mousedev_write,
621         .poll =         mousedev_poll,
622         .open =         mousedev_open,
623         .release =      mousedev_release,
624         .fasync =       mousedev_fasync,
625 };
626
627 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev,
628                                              const struct input_device_id *id)
629 {
630         struct mousedev *mousedev;
631         struct class_device *cdev;
632         int minor = 0;
633
634         for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++);
635         if (minor == MOUSEDEV_MINORS) {
636                 printk(KERN_ERR "mousedev: no more free mousedev devices\n");
637                 return NULL;
638         }
639
640         if (!(mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL)))
641                 return NULL;
642
643         INIT_LIST_HEAD(&mousedev->list);
644         init_waitqueue_head(&mousedev->wait);
645
646         mousedev->minor = minor;
647         mousedev->exist = 1;
648         mousedev->handle.dev = dev;
649         mousedev->handle.name = mousedev->name;
650         mousedev->handle.handler = handler;
651         mousedev->handle.private = mousedev;
652         sprintf(mousedev->name, "mouse%d", minor);
653
654         if (mousedev_mix.open)
655                 input_open_device(&mousedev->handle);
656
657         mousedev_table[minor] = mousedev;
658
659         cdev = class_device_create(&input_class, &dev->cdev,
660                         MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
661                         dev->cdev.dev, mousedev->name);
662
663         /* temporary symlink to keep userspace happy */
664         sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
665                           mousedev->name);
666
667         return &mousedev->handle;
668 }
669
670 static void mousedev_disconnect(struct input_handle *handle)
671 {
672         struct mousedev *mousedev = handle->private;
673         struct mousedev_list *list;
674
675         sysfs_remove_link(&input_class.subsys.kset.kobj, mousedev->name);
676         class_device_destroy(&input_class,
677                         MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor));
678         mousedev->exist = 0;
679
680         if (mousedev->open) {
681                 input_close_device(handle);
682                 wake_up_interruptible(&mousedev->wait);
683                 list_for_each_entry(list, &mousedev->list, node)
684                         kill_fasync(&list->fasync, SIGIO, POLL_HUP);
685         } else {
686                 if (mousedev_mix.open)
687                         input_close_device(handle);
688                 mousedev_free(mousedev);
689         }
690 }
691
692 static const struct input_device_id mousedev_ids[] = {
693         {
694                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
695                 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
696                 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) },
697                 .relbit = { BIT(REL_X) | BIT(REL_Y) },
698         },      /* A mouse like device, at least one button, two relative axes */
699         {
700                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
701                 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
702                 .relbit = { BIT(REL_WHEEL) },
703         },      /* A separate scrollwheel */
704         {
705                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
706                 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
707                 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
708                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) },
709         },      /* A tablet like device, at least touch detection, two absolute axes */
710         {
711                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
712                 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
713                 .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) },
714                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) },
715         },      /* A touchpad */
716
717         { },    /* Terminating entry */
718 };
719
720 MODULE_DEVICE_TABLE(input, mousedev_ids);
721
722 static struct input_handler mousedev_handler = {
723         .event =        mousedev_event,
724         .connect =      mousedev_connect,
725         .disconnect =   mousedev_disconnect,
726         .fops =         &mousedev_fops,
727         .minor =        MOUSEDEV_MINOR_BASE,
728         .name =         "mousedev",
729         .id_table =     mousedev_ids,
730 };
731
732 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
733 static struct miscdevice psaux_mouse = {
734         PSMOUSE_MINOR, "psaux", &mousedev_fops
735 };
736 static int psaux_registered;
737 #endif
738
739 static int __init mousedev_init(void)
740 {
741         struct class_device *cdev;
742         int error;
743
744         error = input_register_handler(&mousedev_handler);
745         if (error)
746                 return error;
747
748         memset(&mousedev_mix, 0, sizeof(struct mousedev));
749         INIT_LIST_HEAD(&mousedev_mix.list);
750         init_waitqueue_head(&mousedev_mix.wait);
751         mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
752         mousedev_mix.exist = 1;
753         mousedev_mix.minor = MOUSEDEV_MIX;
754
755         cdev = class_device_create(&input_class, NULL,
756                         MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), NULL, "mice");
757         if (IS_ERR(cdev)) {
758                 input_unregister_handler(&mousedev_handler);
759                 return PTR_ERR(cdev);
760         }
761
762 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
763         error = misc_register(&psaux_mouse);
764         if (error)
765                 printk(KERN_WARNING "mice: could not register psaux device, "
766                         "error: %d\n", error);
767         else
768                 psaux_registered = 1;
769 #endif
770
771         printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
772
773         return 0;
774 }
775
776 static void __exit mousedev_exit(void)
777 {
778 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
779         if (psaux_registered)
780                 misc_deregister(&psaux_mouse);
781 #endif
782         class_device_destroy(&input_class,
783                         MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX));
784         input_unregister_handler(&mousedev_handler);
785 }
786
787 module_init(mousedev_init);
788 module_exit(mousedev_exit);