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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / input / mousedev.c
blob564974ce57935402ceb2e44471d727b07a056070
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);
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