eb721b11ff3772af9f74fac759903f6a1cdf42ce
[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/config.h>
23 #include <linux/smp_lock.h>
24 #include <linux/random.h>
25 #include <linux/major.h>
26 #include <linux/device.h>
27 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
28 #include <linux/miscdevice.h>
29 #endif
30
31 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
32 MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces");
33 MODULE_LICENSE("GPL");
34
35 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X
36 #define CONFIG_INPUT_MOUSEDEV_SCREEN_X  1024
37 #endif
38 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y
39 #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y  768
40 #endif
41
42 static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X;
43 module_param(xres, uint, 0644);
44 MODULE_PARM_DESC(xres, "Horizontal screen resolution");
45
46 static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y;
47 module_param(yres, uint, 0644);
48 MODULE_PARM_DESC(yres, "Vertical screen resolution");
49
50 static unsigned tap_time = 200;
51 module_param(tap_time, uint, 0644);
52 MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)");
53
54 struct mousedev_hw_data {
55         int dx, dy, dz;
56         int x, y;
57         int abs_event;
58         unsigned long buttons;
59 };
60
61 struct mousedev {
62         int exist;
63         int open;
64         int minor;
65         char name[16];
66         wait_queue_head_t wait;
67         struct list_head list;
68         struct input_handle handle;
69
70         struct mousedev_hw_data packet;
71         unsigned int pkt_count;
72         int old_x[4], old_y[4];
73         int frac_dx, frac_dy;
74         unsigned long touch;
75 };
76
77 enum mousedev_emul {
78         MOUSEDEV_EMUL_PS2,
79         MOUSEDEV_EMUL_IMPS,
80         MOUSEDEV_EMUL_EXPS
81 };
82
83 struct mousedev_motion {
84         int dx, dy, dz;
85         unsigned long buttons;
86 };
87
88 #define PACKET_QUEUE_LEN        16
89 struct mousedev_list {
90         struct fasync_struct *fasync;
91         struct mousedev *mousedev;
92         struct list_head node;
93
94         struct mousedev_motion packets[PACKET_QUEUE_LEN];
95         unsigned int head, tail;
96         spinlock_t packet_lock;
97         int pos_x, pos_y;
98
99         signed char ps2[6];
100         unsigned char ready, buffer, bufsiz;
101         unsigned char imexseq, impsseq;
102         enum mousedev_emul mode;
103         unsigned long last_buttons;
104 };
105
106 #define MOUSEDEV_SEQ_LEN        6
107
108 static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 };
109 static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 };
110
111 static struct input_handler mousedev_handler;
112
113 static struct mousedev *mousedev_table[MOUSEDEV_MINORS];
114 static struct mousedev mousedev_mix;
115
116 #define fx(i)  (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
117 #define fy(i)  (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
118
119 static void mousedev_touchpad_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
120 {
121         int size, tmp;
122         enum { FRACTION_DENOM = 128 };
123
124         if (mousedev->touch) {
125                 size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
126                 if (size == 0)
127                         size = 256 * 2;
128
129                 switch (code) {
130                         case ABS_X:
131                                 fx(0) = value;
132                                 if (mousedev->pkt_count >= 2) {
133                                         tmp = ((value - fx(2)) * (256 * FRACTION_DENOM)) / size;
134                                         tmp += mousedev->frac_dx;
135                                         mousedev->packet.dx = tmp / FRACTION_DENOM;
136                                         mousedev->frac_dx = tmp - mousedev->packet.dx * FRACTION_DENOM;
137                                 }
138                                 break;
139
140                         case ABS_Y:
141                                 fy(0) = value;
142                                 if (mousedev->pkt_count >= 2) {
143                                         tmp = -((value - fy(2)) * (256 * FRACTION_DENOM)) / size;
144                                         tmp += mousedev->frac_dy;
145                                         mousedev->packet.dy = tmp / FRACTION_DENOM;
146                                         mousedev->frac_dy = tmp - mousedev->packet.dy * FRACTION_DENOM;
147                                 }
148                                 break;
149                 }
150         }
151 }
152
153 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
154 {
155         int size;
156
157         switch (code) {
158                 case ABS_X:
159                         size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
160                         if (size == 0)
161                                 size = xres ? : 1;
162                         if (value > dev->absmax[ABS_X])
163                                 value = dev->absmax[ABS_X];
164                         if (value < dev->absmin[ABS_X])
165                                 value = dev->absmin[ABS_X];
166                         mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size;
167                         mousedev->packet.abs_event = 1;
168                         break;
169
170                 case ABS_Y:
171                         size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y];
172                         if (size == 0)
173                                 size = yres ? : 1;
174                         if (value > dev->absmax[ABS_Y])
175                                 value = dev->absmax[ABS_Y];
176                         if (value < dev->absmin[ABS_Y])
177                                 value = dev->absmin[ABS_Y];
178                         mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size;
179                         mousedev->packet.abs_event = 1;
180                         break;
181         }
182 }
183
184 static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value)
185 {
186         switch (code) {
187                 case REL_X:     mousedev->packet.dx += value; break;
188                 case REL_Y:     mousedev->packet.dy -= value; break;
189                 case REL_WHEEL: mousedev->packet.dz -= value; break;
190         }
191 }
192
193 static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value)
194 {
195         int index;
196
197         switch (code) {
198                 case BTN_TOUCH:
199                 case BTN_0:
200                 case BTN_FORWARD:
201                 case BTN_LEFT:          index = 0; break;
202                 case BTN_STYLUS:
203                 case BTN_1:
204                 case BTN_RIGHT:         index = 1; break;
205                 case BTN_2:
206                 case BTN_STYLUS2:
207                 case BTN_MIDDLE:        index = 2; break;
208                 case BTN_3:
209                 case BTN_BACK:
210                 case BTN_SIDE:          index = 3; break;
211                 case BTN_4:
212                 case BTN_EXTRA:         index = 4; break;
213                 default:                return;
214         }
215
216         if (value) {
217                 set_bit(index, &mousedev->packet.buttons);
218                 set_bit(index, &mousedev_mix.packet.buttons);
219         } else {
220                 clear_bit(index, &mousedev->packet.buttons);
221                 clear_bit(index, &mousedev_mix.packet.buttons);
222         }
223 }
224
225 static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet)
226 {
227         struct mousedev_list *list;
228         struct mousedev_motion *p;
229         unsigned long flags;
230         int wake_readers = 0;
231
232         list_for_each_entry(list, &mousedev->list, node) {
233                 spin_lock_irqsave(&list->packet_lock, flags);
234
235                 p = &list->packets[list->head];
236                 if (list->ready && p->buttons != mousedev->packet.buttons) {
237                         unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN;
238                         if (new_head != list->tail) {
239                                 p = &list->packets[list->head = new_head];
240                                 memset(p, 0, sizeof(struct mousedev_motion));
241                         }
242                 }
243
244                 if (packet->abs_event) {
245                         p->dx += packet->x - list->pos_x;
246                         p->dy += packet->y - list->pos_y;
247                         list->pos_x = packet->x;
248                         list->pos_y = packet->y;
249                 }
250
251                 list->pos_x += packet->dx;
252                 list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x);
253                 list->pos_y += packet->dy;
254                 list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y);
255
256                 p->dx += packet->dx;
257                 p->dy += packet->dy;
258                 p->dz += packet->dz;
259                 p->buttons = mousedev->packet.buttons;
260
261                 if (p->dx || p->dy || p->dz || p->buttons != list->last_buttons)
262                         list->ready = 1;
263
264                 spin_unlock_irqrestore(&list->packet_lock, flags);
265
266                 if (list->ready) {
267                         kill_fasync(&list->fasync, SIGIO, POLL_IN);
268                         wake_readers = 1;
269                 }
270         }
271
272         if (wake_readers)
273                 wake_up_interruptible(&mousedev->wait);
274 }
275
276 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
277 {
278         if (!value) {
279                 if (mousedev->touch &&
280                     time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) {
281                         /*
282                          * Toggle left button to emulate tap.
283                          * We rely on the fact that mousedev_mix always has 0
284                          * motion packet so we won't mess current position.
285                          */
286                         set_bit(0, &mousedev->packet.buttons);
287                         set_bit(0, &mousedev_mix.packet.buttons);
288                         mousedev_notify_readers(mousedev, &mousedev_mix.packet);
289                         mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet);
290                         clear_bit(0, &mousedev->packet.buttons);
291                         clear_bit(0, &mousedev_mix.packet.buttons);
292                 }
293                 mousedev->touch = mousedev->pkt_count = 0;
294                 mousedev->frac_dx = 0;
295                 mousedev->frac_dy = 0;
296
297         } else if (!mousedev->touch)
298                 mousedev->touch = jiffies;
299 }
300
301 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
302 {
303         struct mousedev *mousedev = handle->private;
304
305         switch (type) {
306                 case EV_ABS:
307                         /* Ignore joysticks */
308                         if (test_bit(BTN_TRIGGER, handle->dev->keybit))
309                                 return;
310
311                         if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
312                                 mousedev_touchpad_event(handle->dev, mousedev, code, value);
313                         else
314                                 mousedev_abs_event(handle->dev, mousedev, code, value);
315
316                         break;
317
318                 case EV_REL:
319                         mousedev_rel_event(mousedev, code, value);
320                         break;
321
322                 case EV_KEY:
323                         if (value != 2) {
324                                 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
325                                         mousedev_touchpad_touch(mousedev, value);
326                                 else
327                                         mousedev_key_event(mousedev, code, value);
328                         }
329                         break;
330
331                 case EV_SYN:
332                         if (code == SYN_REPORT) {
333                                 if (mousedev->touch) {
334                                         mousedev->pkt_count++;
335                                         /* Input system eats duplicate events, but we need all of them
336                                          * to do correct averaging so apply present one forward
337                                          */
338                                         fx(0) = fx(1);
339                                         fy(0) = fy(1);
340                                 }
341
342                                 mousedev_notify_readers(mousedev, &mousedev->packet);
343                                 mousedev_notify_readers(&mousedev_mix, &mousedev->packet);
344
345                                 mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0;
346                                 mousedev->packet.abs_event = 0;
347                         }
348                         break;
349         }
350 }
351
352 static int mousedev_fasync(int fd, struct file *file, int on)
353 {
354         int retval;
355         struct mousedev_list *list = file->private_data;
356
357         retval = fasync_helper(fd, file, on, &list->fasync);
358
359         return retval < 0 ? retval : 0;
360 }
361
362 static void mousedev_free(struct mousedev *mousedev)
363 {
364         mousedev_table[mousedev->minor] = NULL;
365         kfree(mousedev);
366 }
367
368 static void mixdev_release(void)
369 {
370         struct input_handle *handle;
371
372         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
373                 struct mousedev *mousedev = handle->private;
374
375                 if (!mousedev->open) {
376                         if (mousedev->exist)
377                                 input_close_device(&mousedev->handle);
378                         else
379                                 mousedev_free(mousedev);
380                 }
381         }
382 }
383
384 static int mousedev_release(struct inode * inode, struct file * file)
385 {
386         struct mousedev_list *list = file->private_data;
387
388         mousedev_fasync(-1, file, 0);
389
390         list_del(&list->node);
391
392         if (!--list->mousedev->open) {
393                 if (list->mousedev->minor == MOUSEDEV_MIX)
394                         mixdev_release();
395                 else if (!mousedev_mix.open) {
396                         if (list->mousedev->exist)
397                                 input_close_device(&list->mousedev->handle);
398                         else
399                                 mousedev_free(list->mousedev);
400                 }
401         }
402
403         kfree(list);
404         return 0;
405 }
406
407 static int mousedev_open(struct inode * inode, struct file * file)
408 {
409         struct mousedev_list *list;
410         struct input_handle *handle;
411         struct mousedev *mousedev;
412         int i;
413
414 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
415         if (imajor(inode) == MISC_MAJOR)
416                 i = MOUSEDEV_MIX;
417         else
418 #endif
419                 i = iminor(inode) - MOUSEDEV_MINOR_BASE;
420
421         if (i >= MOUSEDEV_MINORS || !mousedev_table[i])
422                 return -ENODEV;
423
424         if (!(list = kzalloc(sizeof(struct mousedev_list), GFP_KERNEL)))
425                 return -ENOMEM;
426
427         spin_lock_init(&list->packet_lock);
428         list->pos_x = xres / 2;
429         list->pos_y = yres / 2;
430         list->mousedev = mousedev_table[i];
431         list_add_tail(&list->node, &mousedev_table[i]->list);
432         file->private_data = list;
433
434         if (!list->mousedev->open++) {
435                 if (list->mousedev->minor == MOUSEDEV_MIX) {
436                         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
437                                 mousedev = handle->private;
438                                 if (!mousedev->open && mousedev->exist)
439                                         input_open_device(handle);
440                         }
441                 } else
442                         if (!mousedev_mix.open && list->mousedev->exist)
443                                 input_open_device(&list->mousedev->handle);
444         }
445
446         return 0;
447 }
448
449 static inline int mousedev_limit_delta(int delta, int limit)
450 {
451         return delta > limit ? limit : (delta < -limit ? -limit : delta);
452 }
453
454 static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
455 {
456         struct mousedev_motion *p;
457         unsigned long flags;
458
459         spin_lock_irqsave(&list->packet_lock, flags);
460         p = &list->packets[list->tail];
461
462         ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
463         ps2_data[1] = mousedev_limit_delta(p->dx, 127);
464         ps2_data[2] = mousedev_limit_delta(p->dy, 127);
465         p->dx -= ps2_data[1];
466         p->dy -= ps2_data[2];
467
468         switch (list->mode) {
469                 case MOUSEDEV_EMUL_EXPS:
470                         ps2_data[3] = mousedev_limit_delta(p->dz, 7);
471                         p->dz -= ps2_data[3];
472                         ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
473                         list->bufsiz = 4;
474                         break;
475
476                 case MOUSEDEV_EMUL_IMPS:
477                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
478                         ps2_data[3] = mousedev_limit_delta(p->dz, 127);
479                         p->dz -= ps2_data[3];
480                         list->bufsiz = 4;
481                         break;
482
483                 case MOUSEDEV_EMUL_PS2:
484                 default:
485                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
486                         p->dz = 0;
487                         list->bufsiz = 3;
488                         break;
489         }
490
491         if (!p->dx && !p->dy && !p->dz) {
492                 if (list->tail == list->head) {
493                         list->ready = 0;
494                         list->last_buttons = p->buttons;
495                 } else
496                         list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
497         }
498
499         spin_unlock_irqrestore(&list->packet_lock, flags);
500 }
501
502
503 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
504 {
505         struct mousedev_list *list = file->private_data;
506         unsigned char c;
507         unsigned int i;
508
509         for (i = 0; i < count; i++) {
510
511                 if (get_user(c, buffer + i))
512                         return -EFAULT;
513
514                 if (c == mousedev_imex_seq[list->imexseq]) {
515                         if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
516                                 list->imexseq = 0;
517                                 list->mode = MOUSEDEV_EMUL_EXPS;
518                         }
519                 } else
520                         list->imexseq = 0;
521
522                 if (c == mousedev_imps_seq[list->impsseq]) {
523                         if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
524                                 list->impsseq = 0;
525                                 list->mode = MOUSEDEV_EMUL_IMPS;
526                         }
527                 } else
528                         list->impsseq = 0;
529
530                 list->ps2[0] = 0xfa;
531
532                 switch (c) {
533
534                         case 0xeb: /* Poll */
535                                 mousedev_packet(list, &list->ps2[1]);
536                                 list->bufsiz++; /* account for leading ACK */
537                                 break;
538
539                         case 0xf2: /* Get ID */
540                                 switch (list->mode) {
541                                         case MOUSEDEV_EMUL_PS2:  list->ps2[1] = 0; break;
542                                         case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break;
543                                         case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break;
544                                 }
545                                 list->bufsiz = 2;
546                                 break;
547
548                         case 0xe9: /* Get info */
549                                 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200;
550                                 list->bufsiz = 4;
551                                 break;
552
553                         case 0xff: /* Reset */
554                                 list->impsseq = list->imexseq = 0;
555                                 list->mode = MOUSEDEV_EMUL_PS2;
556                                 list->ps2[1] = 0xaa; list->ps2[2] = 0x00;
557                                 list->bufsiz = 3;
558                                 break;
559
560                         default:
561                                 list->bufsiz = 1;
562                                 break;
563                 }
564
565                 list->buffer = list->bufsiz;
566         }
567
568         kill_fasync(&list->fasync, SIGIO, POLL_IN);
569
570         wake_up_interruptible(&list->mousedev->wait);
571
572         return count;
573 }
574
575 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
576 {
577         struct mousedev_list *list = file->private_data;
578         int retval = 0;
579
580         if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
581                 return -EAGAIN;
582
583         retval = wait_event_interruptible(list->mousedev->wait,
584                                           !list->mousedev->exist || list->ready || list->buffer);
585
586         if (retval)
587                 return retval;
588
589         if (!list->mousedev->exist)
590                 return -ENODEV;
591
592         if (!list->buffer && list->ready) {
593                 mousedev_packet(list, list->ps2);
594                 list->buffer = list->bufsiz;
595         }
596
597         if (count > list->buffer)
598                 count = list->buffer;
599
600         list->buffer -= count;
601
602         if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count))
603                 return -EFAULT;
604
605         return count;
606 }
607
608 /* No kernel lock - fine */
609 static unsigned int mousedev_poll(struct file *file, poll_table *wait)
610 {
611         struct mousedev_list *list = file->private_data;
612
613         poll_wait(file, &list->mousedev->wait, wait);
614         return ((list->ready || list->buffer) ? (POLLIN | POLLRDNORM) : 0) |
615                 (list->mousedev->exist ? 0 : (POLLHUP | POLLERR));
616 }
617
618 static struct file_operations mousedev_fops = {
619         .owner =        THIS_MODULE,
620         .read =         mousedev_read,
621         .write =        mousedev_write,
622         .poll =         mousedev_poll,
623         .open =         mousedev_open,
624         .release =      mousedev_release,
625         .fasync =       mousedev_fasync,
626 };
627
628 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, 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 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         input_register_handler(&mousedev_handler);
742
743         memset(&mousedev_mix, 0, sizeof(struct mousedev));
744         INIT_LIST_HEAD(&mousedev_mix.list);
745         init_waitqueue_head(&mousedev_mix.wait);
746         mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
747         mousedev_mix.exist = 1;
748         mousedev_mix.minor = MOUSEDEV_MIX;
749
750         class_device_create(&input_class, NULL,
751                         MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), NULL, "mice");
752
753 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
754         if (!(psaux_registered = !misc_register(&psaux_mouse)))
755                 printk(KERN_WARNING "mice: could not misc_register the device\n");
756 #endif
757
758         printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
759
760         return 0;
761 }
762
763 static void __exit mousedev_exit(void)
764 {
765 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
766         if (psaux_registered)
767                 misc_deregister(&psaux_mouse);
768 #endif
769         class_device_destroy(&input_class,
770                         MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX));
771         input_unregister_handler(&mousedev_handler);
772 }
773
774 module_init(mousedev_init);
775 module_exit(mousedev_exit);