[PATCH] drivers/input/mouse: convert to dynamic input_dev allocation
[linux-2.6.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, 0);
44 MODULE_PARM_DESC(xres, "Horizontal screen resolution");
45
46 static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y;
47 module_param(yres, uint, 0);
48 MODULE_PARM_DESC(yres, "Vertical screen resolution");
49
50 static unsigned tap_time = 200;
51 module_param(tap_time, uint, 0);
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) size = 256 * 2;
127                 switch (code) {
128                         case ABS_X:
129                                 fx(0) = value;
130                                 if (mousedev->pkt_count >= 2) {
131                                         tmp = ((value - fx(2)) * (256 * FRACTION_DENOM)) / size;
132                                         tmp += mousedev->frac_dx;
133                                         mousedev->packet.dx = tmp / FRACTION_DENOM;
134                                         mousedev->frac_dx = tmp - mousedev->packet.dx * FRACTION_DENOM;
135                                 }
136                                 break;
137
138                         case ABS_Y:
139                                 fy(0) = value;
140                                 if (mousedev->pkt_count >= 2) {
141                                         tmp = -((value - fy(2)) * (256 * FRACTION_DENOM)) / size;
142                                         tmp += mousedev->frac_dy;
143                                         mousedev->packet.dy = tmp / FRACTION_DENOM;
144                                         mousedev->frac_dy = tmp - mousedev->packet.dy * FRACTION_DENOM;
145                                 }
146                                 break;
147                 }
148         }
149 }
150
151 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
152 {
153         int size;
154
155         switch (code) {
156                 case ABS_X:
157                         size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
158                         if (size == 0) size = xres;
159                         if (value > dev->absmax[ABS_X]) value = dev->absmax[ABS_X];
160                         if (value < dev->absmin[ABS_X]) value = dev->absmin[ABS_X];
161                         mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size;
162                         mousedev->packet.abs_event = 1;
163                         break;
164
165                 case ABS_Y:
166                         size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y];
167                         if (size == 0) size = yres;
168                         if (value > dev->absmax[ABS_Y]) value = dev->absmax[ABS_Y];
169                         if (value < dev->absmin[ABS_Y]) value = dev->absmin[ABS_Y];
170                         mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size;
171                         mousedev->packet.abs_event = 1;
172                         break;
173         }
174 }
175
176 static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value)
177 {
178         switch (code) {
179                 case REL_X:     mousedev->packet.dx += value; break;
180                 case REL_Y:     mousedev->packet.dy -= value; break;
181                 case REL_WHEEL: mousedev->packet.dz -= value; break;
182         }
183 }
184
185 static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value)
186 {
187         int index;
188
189         switch (code) {
190                 case BTN_TOUCH:
191                 case BTN_0:
192                 case BTN_FORWARD:
193                 case BTN_LEFT:          index = 0; break;
194                 case BTN_STYLUS:
195                 case BTN_1:
196                 case BTN_RIGHT:         index = 1; break;
197                 case BTN_2:
198                 case BTN_STYLUS2:
199                 case BTN_MIDDLE:        index = 2; break;
200                 case BTN_3:
201                 case BTN_BACK:
202                 case BTN_SIDE:          index = 3; break;
203                 case BTN_4:
204                 case BTN_EXTRA:         index = 4; break;
205                 default:                return;
206         }
207
208         if (value) {
209                 set_bit(index, &mousedev->packet.buttons);
210                 set_bit(index, &mousedev_mix.packet.buttons);
211         } else {
212                 clear_bit(index, &mousedev->packet.buttons);
213                 clear_bit(index, &mousedev_mix.packet.buttons);
214         }
215 }
216
217 static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet)
218 {
219         struct mousedev_list *list;
220         struct mousedev_motion *p;
221         unsigned long flags;
222         int wake_readers = 0;
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                         wake_readers = 1;
261                 }
262         }
263
264         if (wake_readers)
265                 wake_up_interruptible(&mousedev->wait);
266 }
267
268 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
269 {
270         if (!value) {
271                 if (mousedev->touch &&
272                     time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) {
273                         /*
274                          * Toggle left button to emulate tap.
275                          * We rely on the fact that mousedev_mix always has 0
276                          * motion packet so we won't mess current position.
277                          */
278                         set_bit(0, &mousedev->packet.buttons);
279                         set_bit(0, &mousedev_mix.packet.buttons);
280                         mousedev_notify_readers(mousedev, &mousedev_mix.packet);
281                         mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet);
282                         clear_bit(0, &mousedev->packet.buttons);
283                         clear_bit(0, &mousedev_mix.packet.buttons);
284                 }
285                 mousedev->touch = mousedev->pkt_count = 0;
286                 mousedev->frac_dx = 0;
287                 mousedev->frac_dy = 0;
288         }
289         else
290                 if (!mousedev->touch)
291                         mousedev->touch = jiffies;
292 }
293
294 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
295 {
296         struct mousedev *mousedev = handle->private;
297
298         switch (type) {
299                 case EV_ABS:
300                         /* Ignore joysticks */
301                         if (test_bit(BTN_TRIGGER, handle->dev->keybit))
302                                 return;
303
304                         if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
305                                 mousedev_touchpad_event(handle->dev, mousedev, code, value);
306                         else
307                                 mousedev_abs_event(handle->dev, mousedev, code, value);
308
309                         break;
310
311                 case EV_REL:
312                         mousedev_rel_event(mousedev, code, value);
313                         break;
314
315                 case EV_KEY:
316                         if (value != 2) {
317                                 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
318                                         mousedev_touchpad_touch(mousedev, value);
319                                 else
320                                         mousedev_key_event(mousedev, code, value);
321                         }
322                         break;
323
324                 case EV_SYN:
325                         if (code == SYN_REPORT) {
326                                 if (mousedev->touch) {
327                                         mousedev->pkt_count++;
328                                         /* Input system eats duplicate events, but we need all of them
329                                          * to do correct averaging so apply present one forward
330                                          */
331                                         fx(0) = fx(1);
332                                         fy(0) = fy(1);
333                                 }
334
335                                 mousedev_notify_readers(mousedev, &mousedev->packet);
336                                 mousedev_notify_readers(&mousedev_mix, &mousedev->packet);
337
338                                 mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0;
339                                 mousedev->packet.abs_event = 0;
340                         }
341                         break;
342         }
343 }
344
345 static int mousedev_fasync(int fd, struct file *file, int on)
346 {
347         int retval;
348         struct mousedev_list *list = file->private_data;
349         retval = fasync_helper(fd, file, on, &list->fasync);
350         return retval < 0 ? retval : 0;
351 }
352
353 static void mousedev_free(struct mousedev *mousedev)
354 {
355         mousedev_table[mousedev->minor] = NULL;
356         kfree(mousedev);
357 }
358
359 static int mixdev_release(void)
360 {
361         struct input_handle *handle;
362
363         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
364                 struct mousedev *mousedev = handle->private;
365
366                 if (!mousedev->open) {
367                         if (mousedev->exist)
368                                 input_close_device(&mousedev->handle);
369                         else
370                                 mousedev_free(mousedev);
371                 }
372         }
373
374         return 0;
375 }
376
377 static int mousedev_release(struct inode * inode, struct file * file)
378 {
379         struct mousedev_list *list = file->private_data;
380
381         mousedev_fasync(-1, file, 0);
382
383         list_del(&list->node);
384
385         if (!--list->mousedev->open) {
386                 if (list->mousedev->minor == MOUSEDEV_MIX)
387                         return mixdev_release();
388
389                 if (!mousedev_mix.open) {
390                         if (list->mousedev->exist)
391                                 input_close_device(&list->mousedev->handle);
392                         else
393                                 mousedev_free(list->mousedev);
394                 }
395         }
396
397         kfree(list);
398         return 0;
399 }
400
401 static int mousedev_open(struct inode * inode, struct file * file)
402 {
403         struct mousedev_list *list;
404         struct input_handle *handle;
405         struct mousedev *mousedev;
406         int i;
407
408 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
409         if (imajor(inode) == MISC_MAJOR)
410                 i = MOUSEDEV_MIX;
411         else
412 #endif
413                 i = iminor(inode) - MOUSEDEV_MINOR_BASE;
414
415         if (i >= MOUSEDEV_MINORS || !mousedev_table[i])
416                 return -ENODEV;
417
418         if (!(list = kmalloc(sizeof(struct mousedev_list), GFP_KERNEL)))
419                 return -ENOMEM;
420         memset(list, 0, sizeof(struct mousedev_list));
421
422         spin_lock_init(&list->packet_lock);
423         list->pos_x = xres / 2;
424         list->pos_y = yres / 2;
425         list->mousedev = mousedev_table[i];
426         list_add_tail(&list->node, &mousedev_table[i]->list);
427         file->private_data = list;
428
429         if (!list->mousedev->open++) {
430                 if (list->mousedev->minor == MOUSEDEV_MIX) {
431                         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
432                                 mousedev = handle->private;
433                                 if (!mousedev->open && mousedev->exist)
434                                         input_open_device(handle);
435                         }
436                 } else
437                         if (!mousedev_mix.open && list->mousedev->exist)
438                                 input_open_device(&list->mousedev->handle);
439         }
440
441         return 0;
442 }
443
444 static inline int mousedev_limit_delta(int delta, int limit)
445 {
446         return delta > limit ? limit : (delta < -limit ? -limit : delta);
447 }
448
449 static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
450 {
451         struct mousedev_motion *p;
452         unsigned long flags;
453
454         spin_lock_irqsave(&list->packet_lock, flags);
455         p = &list->packets[list->tail];
456
457         ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
458         ps2_data[1] = mousedev_limit_delta(p->dx, 127);
459         ps2_data[2] = mousedev_limit_delta(p->dy, 127);
460         p->dx -= ps2_data[1];
461         p->dy -= ps2_data[2];
462
463         switch (list->mode) {
464                 case MOUSEDEV_EMUL_EXPS:
465                         ps2_data[3] = mousedev_limit_delta(p->dz, 7);
466                         p->dz -= ps2_data[3];
467                         ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
468                         list->bufsiz = 4;
469                         break;
470
471                 case MOUSEDEV_EMUL_IMPS:
472                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
473                         ps2_data[3] = mousedev_limit_delta(p->dz, 127);
474                         p->dz -= ps2_data[3];
475                         list->bufsiz = 4;
476                         break;
477
478                 case MOUSEDEV_EMUL_PS2:
479                 default:
480                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
481                         p->dz = 0;
482                         list->bufsiz = 3;
483                         break;
484         }
485
486         if (!p->dx && !p->dy && !p->dz) {
487                 if (list->tail == list->head) {
488                         list->ready = 0;
489                         list->last_buttons = p->buttons;
490                 } else
491                         list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
492         }
493
494         spin_unlock_irqrestore(&list->packet_lock, flags);
495 }
496
497
498 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
499 {
500         struct mousedev_list *list = file->private_data;
501         unsigned char c;
502         unsigned int i;
503
504         for (i = 0; i < count; i++) {
505
506                 if (get_user(c, buffer + i))
507                         return -EFAULT;
508
509                 if (c == mousedev_imex_seq[list->imexseq]) {
510                         if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
511                                 list->imexseq = 0;
512                                 list->mode = MOUSEDEV_EMUL_EXPS;
513                         }
514                 } else list->imexseq = 0;
515
516                 if (c == mousedev_imps_seq[list->impsseq]) {
517                         if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
518                                 list->impsseq = 0;
519                                 list->mode = MOUSEDEV_EMUL_IMPS;
520                         }
521                 } else list->impsseq = 0;
522
523                 list->ps2[0] = 0xfa;
524
525                 switch (c) {
526
527                         case 0xeb: /* Poll */
528                                 mousedev_packet(list, &list->ps2[1]);
529                                 list->bufsiz++; /* account for leading ACK */
530                                 break;
531
532                         case 0xf2: /* Get ID */
533                                 switch (list->mode) {
534                                         case MOUSEDEV_EMUL_PS2:  list->ps2[1] = 0; break;
535                                         case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break;
536                                         case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break;
537                                 }
538                                 list->bufsiz = 2;
539                                 break;
540
541                         case 0xe9: /* Get info */
542                                 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200;
543                                 list->bufsiz = 4;
544                                 break;
545
546                         case 0xff: /* Reset */
547                                 list->impsseq = list->imexseq = 0;
548                                 list->mode = MOUSEDEV_EMUL_PS2;
549                                 list->ps2[1] = 0xaa; list->ps2[2] = 0x00;
550                                 list->bufsiz = 3;
551                                 break;
552
553                         default:
554                                 list->bufsiz = 1;
555                                 break;
556                 }
557
558                 list->buffer = list->bufsiz;
559         }
560
561         kill_fasync(&list->fasync, SIGIO, POLL_IN);
562
563         wake_up_interruptible(&list->mousedev->wait);
564
565         return count;
566 }
567
568 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
569 {
570         struct mousedev_list *list = file->private_data;
571         int retval = 0;
572
573         if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
574                 return -EAGAIN;
575
576         retval = wait_event_interruptible(list->mousedev->wait,
577                                           !list->mousedev->exist || list->ready || list->buffer);
578
579         if (retval)
580                 return retval;
581
582         if (!list->mousedev->exist)
583                 return -ENODEV;
584
585         if (!list->buffer && list->ready) {
586                 mousedev_packet(list, list->ps2);
587                 list->buffer = list->bufsiz;
588         }
589
590         if (count > list->buffer)
591                 count = list->buffer;
592
593         list->buffer -= count;
594
595         if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count))
596                 return -EFAULT;
597
598         return count;
599 }
600
601 /* No kernel lock - fine */
602 static unsigned int mousedev_poll(struct file *file, poll_table *wait)
603 {
604         struct mousedev_list *list = file->private_data;
605         poll_wait(file, &list->mousedev->wait, wait);
606         return ((list->ready || list->buffer) ? (POLLIN | POLLRDNORM) : 0) |
607                 (list->mousedev->exist ? 0 : (POLLHUP | POLLERR));
608 }
609
610 static struct file_operations mousedev_fops = {
611         .owner =        THIS_MODULE,
612         .read =         mousedev_read,
613         .write =        mousedev_write,
614         .poll =         mousedev_poll,
615         .open =         mousedev_open,
616         .release =      mousedev_release,
617         .fasync =       mousedev_fasync,
618 };
619
620 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
621 {
622         struct mousedev *mousedev;
623         int minor = 0;
624
625         for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++);
626         if (minor == MOUSEDEV_MINORS) {
627                 printk(KERN_ERR "mousedev: no more free mousedev devices\n");
628                 return NULL;
629         }
630
631         if (!(mousedev = kmalloc(sizeof(struct mousedev), GFP_KERNEL)))
632                 return NULL;
633         memset(mousedev, 0, sizeof(struct mousedev));
634
635         INIT_LIST_HEAD(&mousedev->list);
636         init_waitqueue_head(&mousedev->wait);
637
638         mousedev->minor = minor;
639         mousedev->exist = 1;
640         mousedev->handle.dev = dev;
641         mousedev->handle.name = mousedev->name;
642         mousedev->handle.handler = handler;
643         mousedev->handle.private = mousedev;
644         sprintf(mousedev->name, "mouse%d", minor);
645
646         if (mousedev_mix.open)
647                 input_open_device(&mousedev->handle);
648
649         mousedev_table[minor] = mousedev;
650
651         class_device_create(input_class, NULL,
652                         MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
653                         dev->dev, "mouse%d", minor);
654
655         return &mousedev->handle;
656 }
657
658 static void mousedev_disconnect(struct input_handle *handle)
659 {
660         struct mousedev *mousedev = handle->private;
661         struct mousedev_list *list;
662
663         class_device_destroy(input_class,
664                         MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + 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         class_device_create(input_class, NULL,
738                         MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), NULL, "mice");
739
740 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
741         if (!(psaux_registered = !misc_register(&psaux_mouse)))
742                 printk(KERN_WARNING "mice: could not misc_register the device\n");
743 #endif
744
745         printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
746
747         return 0;
748 }
749
750 static void __exit mousedev_exit(void)
751 {
752 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
753         if (psaux_registered)
754                 misc_deregister(&psaux_mouse);
755 #endif
756         class_device_destroy(input_class,
757                         MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX));
758         input_unregister_handler(&mousedev_handler);
759 }
760
761 module_init(mousedev_init);
762 module_exit(mousedev_exit);