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