Linux-2.6.12-rc2
[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 };
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
223         list_for_each_entry(list, &mousedev->list, node) {
224                 spin_lock_irqsave(&list->packet_lock, flags);
225
226                 p = &list->packets[list->head];
227                 if (list->ready && p->buttons != packet->buttons) {
228                         unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN;
229                         if (new_head != list->tail) {
230                                 p = &list->packets[list->head = new_head];
231                                 memset(p, 0, sizeof(struct mousedev_motion));
232                         }
233                 }
234
235                 if (packet->abs_event) {
236                         p->dx += packet->x - list->pos_x;
237                         p->dy += packet->y - list->pos_y;
238                         list->pos_x = packet->x;
239                         list->pos_y = packet->y;
240                 }
241
242                 list->pos_x += packet->dx;
243                 list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x);
244                 list->pos_y += packet->dy;
245                 list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y);
246
247                 p->dx += packet->dx;
248                 p->dy += packet->dy;
249                 p->dz += packet->dz;
250                 p->buttons = mousedev->packet.buttons;
251
252                 list->ready = 1;
253
254                 spin_unlock_irqrestore(&list->packet_lock, flags);
255                 kill_fasync(&list->fasync, SIGIO, POLL_IN);
256         }
257
258         wake_up_interruptible(&mousedev->wait);
259 }
260
261 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
262 {
263         if (!value) {
264                 if (mousedev->touch &&
265                     time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) {
266                         /*
267                          * Toggle left button to emulate tap.
268                          * We rely on the fact that mousedev_mix always has 0
269                          * motion packet so we won't mess current position.
270                          */
271                         set_bit(0, &mousedev->packet.buttons);
272                         set_bit(0, &mousedev_mix.packet.buttons);
273                         mousedev_notify_readers(mousedev, &mousedev_mix.packet);
274                         mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet);
275                         clear_bit(0, &mousedev->packet.buttons);
276                         clear_bit(0, &mousedev_mix.packet.buttons);
277                 }
278                 mousedev->touch = mousedev->pkt_count = 0;
279                 mousedev->frac_dx = 0;
280                 mousedev->frac_dy = 0;
281         }
282         else
283                 if (!mousedev->touch)
284                         mousedev->touch = jiffies;
285 }
286
287 static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
288 {
289         struct mousedev *mousedev = handle->private;
290
291         switch (type) {
292                 case EV_ABS:
293                         /* Ignore joysticks */
294                         if (test_bit(BTN_TRIGGER, handle->dev->keybit))
295                                 return;
296
297                         if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
298                                 mousedev_touchpad_event(handle->dev, mousedev, code, value);
299                         else
300                                 mousedev_abs_event(handle->dev, mousedev, code, value);
301
302                         break;
303
304                 case EV_REL:
305                         mousedev_rel_event(mousedev, code, value);
306                         break;
307
308                 case EV_KEY:
309                         if (value != 2) {
310                                 if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
311                                         mousedev_touchpad_touch(mousedev, value);
312                                 else
313                                         mousedev_key_event(mousedev, code, value);
314                         }
315                         break;
316
317                 case EV_SYN:
318                         if (code == SYN_REPORT) {
319                                 if (mousedev->touch) {
320                                         mousedev->pkt_count++;
321                                         /* Input system eats duplicate events, but we need all of them
322                                          * to do correct averaging so apply present one forward
323                                          */
324                                         fx(0) = fx(1);
325                                         fy(0) = fy(1);
326                                 }
327
328                                 mousedev_notify_readers(mousedev, &mousedev->packet);
329                                 mousedev_notify_readers(&mousedev_mix, &mousedev->packet);
330
331                                 mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0;
332                                 mousedev->packet.abs_event = 0;
333                         }
334                         break;
335         }
336 }
337
338 static int mousedev_fasync(int fd, struct file *file, int on)
339 {
340         int retval;
341         struct mousedev_list *list = file->private_data;
342         retval = fasync_helper(fd, file, on, &list->fasync);
343         return retval < 0 ? retval : 0;
344 }
345
346 static void mousedev_free(struct mousedev *mousedev)
347 {
348         mousedev_table[mousedev->minor] = NULL;
349         kfree(mousedev);
350 }
351
352 static int mixdev_release(void)
353 {
354         struct input_handle *handle;
355
356         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
357                 struct mousedev *mousedev = handle->private;
358
359                 if (!mousedev->open) {
360                         if (mousedev->exist)
361                                 input_close_device(&mousedev->handle);
362                         else
363                                 mousedev_free(mousedev);
364                 }
365         }
366
367         return 0;
368 }
369
370 static int mousedev_release(struct inode * inode, struct file * file)
371 {
372         struct mousedev_list *list = file->private_data;
373
374         mousedev_fasync(-1, file, 0);
375
376         list_del(&list->node);
377
378         if (!--list->mousedev->open) {
379                 if (list->mousedev->minor == MOUSEDEV_MIX)
380                         return mixdev_release();
381
382                 if (!mousedev_mix.open) {
383                         if (list->mousedev->exist)
384                                 input_close_device(&list->mousedev->handle);
385                         else
386                                 mousedev_free(list->mousedev);
387                 }
388         }
389
390         kfree(list);
391         return 0;
392 }
393
394 static int mousedev_open(struct inode * inode, struct file * file)
395 {
396         struct mousedev_list *list;
397         struct input_handle *handle;
398         struct mousedev *mousedev;
399         int i;
400
401 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
402         if (imajor(inode) == MISC_MAJOR)
403                 i = MOUSEDEV_MIX;
404         else
405 #endif
406                 i = iminor(inode) - MOUSEDEV_MINOR_BASE;
407
408         if (i >= MOUSEDEV_MINORS || !mousedev_table[i])
409                 return -ENODEV;
410
411         if (!(list = kmalloc(sizeof(struct mousedev_list), GFP_KERNEL)))
412                 return -ENOMEM;
413         memset(list, 0, sizeof(struct mousedev_list));
414
415         spin_lock_init(&list->packet_lock);
416         list->pos_x = xres / 2;
417         list->pos_y = yres / 2;
418         list->mousedev = mousedev_table[i];
419         list_add_tail(&list->node, &mousedev_table[i]->list);
420         file->private_data = list;
421
422         if (!list->mousedev->open++) {
423                 if (list->mousedev->minor == MOUSEDEV_MIX) {
424                         list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
425                                 mousedev = handle->private;
426                                 if (!mousedev->open && mousedev->exist)
427                                         input_open_device(handle);
428                         }
429                 } else
430                         if (!mousedev_mix.open && list->mousedev->exist)
431                                 input_open_device(&list->mousedev->handle);
432         }
433
434         return 0;
435 }
436
437 static inline int mousedev_limit_delta(int delta, int limit)
438 {
439         return delta > limit ? limit : (delta < -limit ? -limit : delta);
440 }
441
442 static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
443 {
444         struct mousedev_motion *p;
445         unsigned long flags;
446
447         spin_lock_irqsave(&list->packet_lock, flags);
448         p = &list->packets[list->tail];
449
450         ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
451         ps2_data[1] = mousedev_limit_delta(p->dx, 127);
452         ps2_data[2] = mousedev_limit_delta(p->dy, 127);
453         p->dx -= ps2_data[1];
454         p->dy -= ps2_data[2];
455
456         switch (list->mode) {
457                 case MOUSEDEV_EMUL_EXPS:
458                         ps2_data[3] = mousedev_limit_delta(p->dz, 7);
459                         p->dz -= ps2_data[3];
460                         ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
461                         list->bufsiz = 4;
462                         break;
463
464                 case MOUSEDEV_EMUL_IMPS:
465                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
466                         ps2_data[3] = mousedev_limit_delta(p->dz, 127);
467                         p->dz -= ps2_data[3];
468                         list->bufsiz = 4;
469                         break;
470
471                 case MOUSEDEV_EMUL_PS2:
472                 default:
473                         ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
474                         p->dz = 0;
475                         list->bufsiz = 3;
476                         break;
477         }
478
479         if (!p->dx && !p->dy && !p->dz) {
480                 if (list->tail == list->head)
481                         list->ready = 0;
482                 else
483                         list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
484         }
485
486         spin_unlock_irqrestore(&list->packet_lock, flags);
487 }
488
489
490 static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
491 {
492         struct mousedev_list *list = file->private_data;
493         unsigned char c;
494         unsigned int i;
495
496         for (i = 0; i < count; i++) {
497
498                 if (get_user(c, buffer + i))
499                         return -EFAULT;
500
501                 if (c == mousedev_imex_seq[list->imexseq]) {
502                         if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
503                                 list->imexseq = 0;
504                                 list->mode = MOUSEDEV_EMUL_EXPS;
505                         }
506                 } else list->imexseq = 0;
507
508                 if (c == mousedev_imps_seq[list->impsseq]) {
509                         if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
510                                 list->impsseq = 0;
511                                 list->mode = MOUSEDEV_EMUL_IMPS;
512                         }
513                 } else list->impsseq = 0;
514
515                 list->ps2[0] = 0xfa;
516
517                 switch (c) {
518
519                         case 0xeb: /* Poll */
520                                 mousedev_packet(list, &list->ps2[1]);
521                                 list->bufsiz++; /* account for leading ACK */
522                                 break;
523
524                         case 0xf2: /* Get ID */
525                                 switch (list->mode) {
526                                         case MOUSEDEV_EMUL_PS2:  list->ps2[1] = 0; break;
527                                         case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break;
528                                         case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break;
529                                 }
530                                 list->bufsiz = 2;
531                                 break;
532
533                         case 0xe9: /* Get info */
534                                 list->ps2[1] = 0x60; list->ps2[2] = 3; list->ps2[3] = 200;
535                                 list->bufsiz = 4;
536                                 break;
537
538                         case 0xff: /* Reset */
539                                 list->impsseq = list->imexseq = 0;
540                                 list->mode = MOUSEDEV_EMUL_PS2;
541                                 list->ps2[1] = 0xaa; list->ps2[2] = 0x00;
542                                 list->bufsiz = 3;
543                                 break;
544
545                         default:
546                                 list->bufsiz = 1;
547                                 break;
548                 }
549
550                 list->buffer = list->bufsiz;
551         }
552
553         kill_fasync(&list->fasync, SIGIO, POLL_IN);
554
555         wake_up_interruptible(&list->mousedev->wait);
556
557         return count;
558 }
559
560 static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
561 {
562         struct mousedev_list *list = file->private_data;
563         int retval = 0;
564
565         if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
566                 return -EAGAIN;
567
568         retval = wait_event_interruptible(list->mousedev->wait,
569                                           !list->mousedev->exist || list->ready || list->buffer);
570
571         if (retval)
572                 return retval;
573
574         if (!list->mousedev->exist)
575                 return -ENODEV;
576
577         if (!list->buffer && list->ready) {
578                 mousedev_packet(list, list->ps2);
579                 list->buffer = list->bufsiz;
580         }
581
582         if (count > list->buffer)
583                 count = list->buffer;
584
585         list->buffer -= count;
586
587         if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count))
588                 return -EFAULT;
589
590         return count;
591 }
592
593 /* No kernel lock - fine */
594 static unsigned int mousedev_poll(struct file *file, poll_table *wait)
595 {
596         struct mousedev_list *list = file->private_data;
597         poll_wait(file, &list->mousedev->wait, wait);
598         return ((list->ready || list->buffer) ? (POLLIN | POLLRDNORM) : 0) |
599                 (list->mousedev->exist ? 0 : (POLLHUP | POLLERR));
600 }
601
602 static struct file_operations mousedev_fops = {
603         .owner =        THIS_MODULE,
604         .read =         mousedev_read,
605         .write =        mousedev_write,
606         .poll =         mousedev_poll,
607         .open =         mousedev_open,
608         .release =      mousedev_release,
609         .fasync =       mousedev_fasync,
610 };
611
612 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
613 {
614         struct mousedev *mousedev;
615         int minor = 0;
616
617         for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++);
618         if (minor == MOUSEDEV_MINORS) {
619                 printk(KERN_ERR "mousedev: no more free mousedev devices\n");
620                 return NULL;
621         }
622
623         if (!(mousedev = kmalloc(sizeof(struct mousedev), GFP_KERNEL)))
624                 return NULL;
625         memset(mousedev, 0, sizeof(struct mousedev));
626
627         INIT_LIST_HEAD(&mousedev->list);
628         init_waitqueue_head(&mousedev->wait);
629
630         mousedev->minor = minor;
631         mousedev->exist = 1;
632         mousedev->handle.dev = dev;
633         mousedev->handle.name = mousedev->name;
634         mousedev->handle.handler = handler;
635         mousedev->handle.private = mousedev;
636         sprintf(mousedev->name, "mouse%d", minor);
637
638         if (mousedev_mix.open)
639                 input_open_device(&mousedev->handle);
640
641         mousedev_table[minor] = mousedev;
642
643         devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
644                         S_IFCHR|S_IRUGO|S_IWUSR, "input/mouse%d", minor);
645         class_simple_device_add(input_class,
646                                 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
647                                 dev->dev, "mouse%d", minor);
648
649         return &mousedev->handle;
650 }
651
652 static void mousedev_disconnect(struct input_handle *handle)
653 {
654         struct mousedev *mousedev = handle->private;
655         struct mousedev_list *list;
656
657         class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor));
658         devfs_remove("input/mouse%d", mousedev->minor);
659         mousedev->exist = 0;
660
661         if (mousedev->open) {
662                 input_close_device(handle);
663                 wake_up_interruptible(&mousedev->wait);
664                 list_for_each_entry(list, &mousedev->list, node)
665                         kill_fasync(&list->fasync, SIGIO, POLL_HUP);
666         } else {
667                 if (mousedev_mix.open)
668                         input_close_device(handle);
669                 mousedev_free(mousedev);
670         }
671 }
672
673 static struct input_device_id mousedev_ids[] = {
674         {
675                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
676                 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
677                 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) },
678                 .relbit = { BIT(REL_X) | BIT(REL_Y) },
679         },      /* A mouse like device, at least one button, two relative axes */
680         {
681                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
682                 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
683                 .relbit = { BIT(REL_WHEEL) },
684         },      /* A separate scrollwheel */
685         {
686                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
687                 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
688                 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
689                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) },
690         },      /* A tablet like device, at least touch detection, two absolute axes */
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_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) },
695                 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) },
696         },      /* A touchpad */
697
698         { },    /* Terminating entry */
699 };
700
701 MODULE_DEVICE_TABLE(input, mousedev_ids);
702
703 static struct input_handler mousedev_handler = {
704         .event =        mousedev_event,
705         .connect =      mousedev_connect,
706         .disconnect =   mousedev_disconnect,
707         .fops =         &mousedev_fops,
708         .minor =        MOUSEDEV_MINOR_BASE,
709         .name =         "mousedev",
710         .id_table =     mousedev_ids,
711 };
712
713 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
714 static struct miscdevice psaux_mouse = {
715         PSMOUSE_MINOR, "psaux", &mousedev_fops
716 };
717 static int psaux_registered;
718 #endif
719
720 static int __init mousedev_init(void)
721 {
722         input_register_handler(&mousedev_handler);
723
724         memset(&mousedev_mix, 0, sizeof(struct mousedev));
725         INIT_LIST_HEAD(&mousedev_mix.list);
726         init_waitqueue_head(&mousedev_mix.wait);
727         mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
728         mousedev_mix.exist = 1;
729         mousedev_mix.minor = MOUSEDEV_MIX;
730
731         devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX),
732                         S_IFCHR|S_IRUGO|S_IWUSR, "input/mice");
733         class_simple_device_add(input_class, MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX),
734                                 NULL, "mice");
735
736 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
737         if (!(psaux_registered = !misc_register(&psaux_mouse)))
738                 printk(KERN_WARNING "mice: could not misc_register the device\n");
739 #endif
740
741         printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
742
743         return 0;
744 }
745
746 static void __exit mousedev_exit(void)
747 {
748 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
749         if (psaux_registered)
750                 misc_deregister(&psaux_mouse);
751 #endif
752         devfs_remove("input/mice");
753         class_simple_device_remove(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX));
754         input_unregister_handler(&mousedev_handler);
755 }
756
757 module_init(mousedev_init);
758 module_exit(mousedev_exit);