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[PATCH] radix-tree documentation cleanups
[linux-2.6/mini2440.git] / drivers / input / mousedev.c
blob9abed18d2ecf79493b3d4be737b0db25ee60dd22
1 /*
2 * Input driver to ExplorerPS/2 device driver module.
3 *
4 * Copyright (c) 1999-2002 Vojtech Pavlik
5 * Copyright (c) 2004 Dmitry Torokhov
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 */
11
12 #define MOUSEDEV_MINOR_BASE 32
13 #define MOUSEDEV_MINORS 32
14 #define MOUSEDEV_MIX 31
15
16 #include <linux/slab.h>
17 #include <linux/poll.h>
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/init.h>
21 #include <linux/input.h>
22 #include <linux/config.h>
23 #include <linux/smp_lock.h>
24 #include <linux/random.h>
25 #include <linux/major.h>
26 #include <linux/device.h>
27 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
28 #include <linux/miscdevice.h>
29 #endif
30
31 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
32 MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces");
33 MODULE_LICENSE("GPL");
34
35 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X
36 #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024
37 #endif
38 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y
39 #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768
40 #endif
41
42 static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X;
43 module_param(xres, uint, 0644);
44 MODULE_PARM_DESC(xres, "Horizontal screen resolution");
45
46 static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y;
47 module_param(yres, uint, 0644);
48 MODULE_PARM_DESC(yres, "Vertical screen resolution");
49
50 static unsigned tap_time = 200;
51 module_param(tap_time, uint, 0644);
52 MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)");
53
54 struct mousedev_hw_data {
55 int dx, dy, dz;
56 int x, y;
57 int abs_event;
58 unsigned long buttons;
59 };
60
61 struct mousedev {
62 int exist;
63 int open;
64 int minor;
65 char name[16];
66 wait_queue_head_t wait;
67 struct list_head list;
68 struct input_handle handle;
69
70 struct mousedev_hw_data packet;
71 unsigned int pkt_count;
72 int old_x[4], old_y[4];
73 int frac_dx, frac_dy;
74 unsigned long touch;
75 };
76
77 enum mousedev_emul {
78 MOUSEDEV_EMUL_PS2,
79 MOUSEDEV_EMUL_IMPS,
80 MOUSEDEV_EMUL_EXPS
81 };
82
83 struct mousedev_motion {
84 int dx, dy, dz;
85 unsigned long buttons;
86 };
87
88 #define PACKET_QUEUE_LEN 16
89 struct mousedev_list {
90 struct fasync_struct *fasync;
91 struct mousedev *mousedev;
92 struct list_head node;
93
94 struct mousedev_motion packets[PACKET_QUEUE_LEN];
95 unsigned int head, tail;
96 spinlock_t packet_lock;
97 int pos_x, pos_y;
98
99 signed char ps2[6];
100 unsigned char ready, buffer, bufsiz;
101 unsigned char imexseq, impsseq;
102 enum mousedev_emul mode;
103 unsigned long last_buttons;
104 };
105
106 #define MOUSEDEV_SEQ_LEN 6
107
108 static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 };
109 static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 };
110
111 static struct input_handler mousedev_handler;
112
113 static struct mousedev *mousedev_table[MOUSEDEV_MINORS];
114 static struct mousedev mousedev_mix;
115
116 #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
117 #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
118
119 static void mousedev_touchpad_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
120 {
121 int size, tmp;
122 enum { FRACTION_DENOM = 128 };
123
124 if (mousedev->touch) {
125 size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
126 if (size == 0) 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 ? : 1;
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 ? : 1;
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 void 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
375 static int mousedev_release(struct inode * inode, struct file * file)
376 {
377 struct mousedev_list *list = file->private_data;
378
379 mousedev_fasync(-1, file, 0);
380
381 list_del(&list->node);
382
383 if (!--list->mousedev->open) {
384 if (list->mousedev->minor == MOUSEDEV_MIX)
385 mixdev_release();
386 else 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 struct class_device *cdev;
621 int minor = 0;
622
623 for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++);
624 if (minor == MOUSEDEV_MINORS) {
625 printk(KERN_ERR "mousedev: no more free mousedev devices\n");
626 return NULL;
627 }
628
629 if (!(mousedev = kmalloc(sizeof(struct mousedev), GFP_KERNEL)))
630 return NULL;
631 memset(mousedev, 0, sizeof(struct mousedev));
632
633 INIT_LIST_HEAD(&mousedev->list);
634 init_waitqueue_head(&mousedev->wait);
635
636 mousedev->minor = minor;
637 mousedev->exist = 1;
638 mousedev->handle.dev = dev;
639 mousedev->handle.name = mousedev->name;
640 mousedev->handle.handler = handler;
641 mousedev->handle.private = mousedev;
642 sprintf(mousedev->name, "mouse%d", minor);
643
644 if (mousedev_mix.open)
645 input_open_device(&mousedev->handle);
646
647 mousedev_table[minor] = mousedev;
648
649 cdev = class_device_create(&input_class, &dev->cdev,
650 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
651 dev->cdev.dev, mousedev->name);
652
653 /* temporary symlink to keep userspace happy */
654 sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
655 mousedev->name);
656
657 return &mousedev->handle;
658 }
659
660 static void mousedev_disconnect(struct input_handle *handle)
661 {
662 struct mousedev *mousedev = handle->private;
663 struct mousedev_list *list;
664
665 sysfs_remove_link(&input_class.subsys.kset.kobj, mousedev->name);
666 class_device_destroy(&input_class,
667 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor));
668 mousedev->exist = 0;
669
670 if (mousedev->open) {
671 input_close_device(handle);
672 wake_up_interruptible(&mousedev->wait);
673 list_for_each_entry(list, &mousedev->list, node)
674 kill_fasync(&list->fasync, SIGIO, POLL_HUP);
675 } else {
676 if (mousedev_mix.open)
677 input_close_device(handle);
678 mousedev_free(mousedev);
679 }
680 }
681
682 static struct input_device_id mousedev_ids[] = {
683 {
684 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
685 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
686 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) },
687 .relbit = { BIT(REL_X) | BIT(REL_Y) },
688 }, /* A mouse like device, at least one button, two relative axes */
689 {
690 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT,
691 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
692 .relbit = { BIT(REL_WHEEL) },
693 }, /* A separate scrollwheel */
694 {
695 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
696 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
697 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
698 .absbit = { BIT(ABS_X) | BIT(ABS_Y) },
699 }, /* A tablet like device, at least touch detection, two absolute axes */
700 {
701 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
702 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
703 .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) },
704 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) },
705 }, /* A touchpad */
706
707 { }, /* Terminating entry */
708 };
709
710 MODULE_DEVICE_TABLE(input, mousedev_ids);
711
712 static struct input_handler mousedev_handler = {
713 .event = mousedev_event,
714 .connect = mousedev_connect,
715 .disconnect = mousedev_disconnect,
716 .fops = &mousedev_fops,
717 .minor = MOUSEDEV_MINOR_BASE,
718 .name = "mousedev",
719 .id_table = mousedev_ids,
720 };
721
722 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
723 static struct miscdevice psaux_mouse = {
724 PSMOUSE_MINOR, "psaux", &mousedev_fops
725 };
726 static int psaux_registered;
727 #endif
728
729 static int __init mousedev_init(void)
730 {
731 input_register_handler(&mousedev_handler);
732
733 memset(&mousedev_mix, 0, sizeof(struct mousedev));
734 INIT_LIST_HEAD(&mousedev_mix.list);
735 init_waitqueue_head(&mousedev_mix.wait);
736 mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
737 mousedev_mix.exist = 1;
738 mousedev_mix.minor = MOUSEDEV_MIX;
739
740 class_device_create(&input_class, NULL,
741 MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), NULL, "mice");
742
743 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
744 if (!(psaux_registered = !misc_register(&psaux_mouse)))
745 printk(KERN_WARNING "mice: could not misc_register the device\n");
746 #endif
747
748 printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
749
750 return 0;
751 }
752
753 static void __exit mousedev_exit(void)
754 {
755 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
756 if (psaux_registered)
757 misc_deregister(&psaux_mouse);
758 #endif
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);
Support for the Chinese Samsung S3C2440 based development boards