2 * Input driver to ExplorerPS/2 device driver module.
4 * Copyright (c) 1999-2002 Vojtech Pavlik
5 * Copyright (c) 2004 Dmitry Torokhov
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.
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 #define MOUSEDEV_MINOR_BASE 32
15 #define MOUSEDEV_MINORS 32
16 #define MOUSEDEV_MIX 31
18 #include <linux/sched.h>
19 #include <linux/slab.h>
20 #include <linux/poll.h>
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/input.h>
24 #include <linux/random.h>
25 #include <linux/major.h>
26 #include <linux/device.h>
27 #include <linux/cdev.h>
28 #include <linux/kernel.h>
30 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
31 MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces");
32 MODULE_LICENSE("GPL");
34 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X
35 #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024
37 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y
38 #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768
41 static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X;
42 module_param(xres, uint, 0644);
43 MODULE_PARM_DESC(xres, "Horizontal screen resolution");
45 static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y;
46 module_param(yres, uint, 0644);
47 MODULE_PARM_DESC(yres, "Vertical screen resolution");
49 static unsigned tap_time = 200;
50 module_param(tap_time, uint, 0644);
51 MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)");
53 struct mousedev_hw_data {
57 unsigned long buttons;
62 struct input_handle handle;
63 wait_queue_head_t wait;
64 struct list_head client_list;
65 spinlock_t client_lock; /* protects client_list */
72 struct list_head mixdev_node;
73 bool opened_by_mixdev;
75 struct mousedev_hw_data packet;
76 unsigned int pkt_count;
77 int old_x[4], old_y[4];
88 struct mousedev_motion {
90 unsigned long buttons;
93 #define PACKET_QUEUE_LEN 16
94 struct mousedev_client {
95 struct fasync_struct *fasync;
96 struct mousedev *mousedev;
97 struct list_head node;
99 struct mousedev_motion packets[PACKET_QUEUE_LEN];
100 unsigned int head, tail;
101 spinlock_t packet_lock;
105 unsigned char ready, buffer, bufsiz;
106 unsigned char imexseq, impsseq;
107 enum mousedev_emul mode;
108 unsigned long last_buttons;
111 #define MOUSEDEV_SEQ_LEN 6
113 static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 };
114 static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 };
116 static struct mousedev *mousedev_mix;
117 static LIST_HEAD(mousedev_mix_list);
119 static void mixdev_open_devices(void);
120 static void mixdev_close_devices(void);
122 #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
123 #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
125 static void mousedev_touchpad_event(struct input_dev *dev,
126 struct mousedev *mousedev,
127 unsigned int code, int value)
130 enum { FRACTION_DENOM = 128 };
137 if (mousedev->touch && mousedev->pkt_count >= 2) {
138 size = input_abs_get_max(dev, ABS_X) -
139 input_abs_get_min(dev, ABS_X);
143 tmp = ((value - fx(2)) * 256 * FRACTION_DENOM) / size;
144 tmp += mousedev->frac_dx;
145 mousedev->packet.dx = tmp / FRACTION_DENOM;
147 tmp - mousedev->packet.dx * FRACTION_DENOM;
153 if (mousedev->touch && mousedev->pkt_count >= 2) {
154 /* use X size for ABS_Y to keep the same scale */
155 size = input_abs_get_max(dev, ABS_X) -
156 input_abs_get_min(dev, ABS_X);
160 tmp = -((value - fy(2)) * 256 * FRACTION_DENOM) / size;
161 tmp += mousedev->frac_dy;
162 mousedev->packet.dy = tmp / FRACTION_DENOM;
163 mousedev->frac_dy = tmp -
164 mousedev->packet.dy * FRACTION_DENOM;
170 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev,
171 unsigned int code, int value)
178 min = input_abs_get_min(dev, ABS_X);
179 max = input_abs_get_max(dev, ABS_X);
185 value = clamp(value, min, max);
187 mousedev->packet.x = ((value - min) * xres) / size;
188 mousedev->packet.abs_event = 1;
192 min = input_abs_get_min(dev, ABS_Y);
193 max = input_abs_get_max(dev, ABS_Y);
199 value = clamp(value, min, max);
201 mousedev->packet.y = yres - ((value - min) * yres) / size;
202 mousedev->packet.abs_event = 1;
207 static void mousedev_rel_event(struct mousedev *mousedev,
208 unsigned int code, int value)
212 mousedev->packet.dx += value;
216 mousedev->packet.dy -= value;
220 mousedev->packet.dz -= value;
225 static void mousedev_key_event(struct mousedev *mousedev,
226 unsigned int code, int value)
234 case BTN_LEFT: index = 0; break;
238 case BTN_RIGHT: index = 1; break;
243 case BTN_MIDDLE: index = 2; break;
247 case BTN_SIDE: index = 3; break;
250 case BTN_EXTRA: index = 4; break;
256 set_bit(index, &mousedev->packet.buttons);
257 set_bit(index, &mousedev_mix->packet.buttons);
259 clear_bit(index, &mousedev->packet.buttons);
260 clear_bit(index, &mousedev_mix->packet.buttons);
264 static void mousedev_notify_readers(struct mousedev *mousedev,
265 struct mousedev_hw_data *packet)
267 struct mousedev_client *client;
268 struct mousedev_motion *p;
269 unsigned int new_head;
270 int wake_readers = 0;
273 list_for_each_entry_rcu(client, &mousedev->client_list, node) {
275 /* Just acquire the lock, interrupts already disabled */
276 spin_lock(&client->packet_lock);
278 p = &client->packets[client->head];
279 if (client->ready && p->buttons != mousedev->packet.buttons) {
280 new_head = (client->head + 1) % PACKET_QUEUE_LEN;
281 if (new_head != client->tail) {
282 p = &client->packets[client->head = new_head];
283 memset(p, 0, sizeof(struct mousedev_motion));
287 if (packet->abs_event) {
288 p->dx += packet->x - client->pos_x;
289 p->dy += packet->y - client->pos_y;
290 client->pos_x = packet->x;
291 client->pos_y = packet->y;
294 client->pos_x += packet->dx;
295 client->pos_x = client->pos_x < 0 ?
296 0 : (client->pos_x >= xres ? xres : client->pos_x);
297 client->pos_y += packet->dy;
298 client->pos_y = client->pos_y < 0 ?
299 0 : (client->pos_y >= yres ? yres : client->pos_y);
304 p->buttons = mousedev->packet.buttons;
306 if (p->dx || p->dy || p->dz ||
307 p->buttons != client->last_buttons)
310 spin_unlock(&client->packet_lock);
313 kill_fasync(&client->fasync, SIGIO, POLL_IN);
320 wake_up_interruptible(&mousedev->wait);
323 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
326 if (mousedev->touch &&
328 mousedev->touch + msecs_to_jiffies(tap_time))) {
330 * Toggle left button to emulate tap.
331 * We rely on the fact that mousedev_mix always has 0
332 * motion packet so we won't mess current position.
334 set_bit(0, &mousedev->packet.buttons);
335 set_bit(0, &mousedev_mix->packet.buttons);
336 mousedev_notify_readers(mousedev, &mousedev_mix->packet);
337 mousedev_notify_readers(mousedev_mix,
338 &mousedev_mix->packet);
339 clear_bit(0, &mousedev->packet.buttons);
340 clear_bit(0, &mousedev_mix->packet.buttons);
342 mousedev->touch = mousedev->pkt_count = 0;
343 mousedev->frac_dx = 0;
344 mousedev->frac_dy = 0;
346 } else if (!mousedev->touch)
347 mousedev->touch = jiffies;
350 static void mousedev_event(struct input_handle *handle,
351 unsigned int type, unsigned int code, int value)
353 struct mousedev *mousedev = handle->private;
358 /* Ignore joysticks */
359 if (test_bit(BTN_TRIGGER, handle->dev->keybit))
362 if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
363 mousedev_touchpad_event(handle->dev,
364 mousedev, code, value);
366 mousedev_abs_event(handle->dev, mousedev, code, value);
371 mousedev_rel_event(mousedev, code, value);
376 if (code == BTN_TOUCH &&
377 test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
378 mousedev_touchpad_touch(mousedev, value);
380 mousedev_key_event(mousedev, code, value);
385 if (code == SYN_REPORT) {
386 if (mousedev->touch) {
387 mousedev->pkt_count++;
389 * Input system eats duplicate events,
390 * but we need all of them to do correct
391 * averaging so apply present one forward
397 mousedev_notify_readers(mousedev, &mousedev->packet);
398 mousedev_notify_readers(mousedev_mix, &mousedev->packet);
400 mousedev->packet.dx = mousedev->packet.dy =
401 mousedev->packet.dz = 0;
402 mousedev->packet.abs_event = 0;
408 static int mousedev_fasync(int fd, struct file *file, int on)
410 struct mousedev_client *client = file->private_data;
412 return fasync_helper(fd, file, on, &client->fasync);
415 static void mousedev_free(struct device *dev)
417 struct mousedev *mousedev = container_of(dev, struct mousedev, dev);
419 input_put_device(mousedev->handle.dev);
423 static int mousedev_open_device(struct mousedev *mousedev)
427 retval = mutex_lock_interruptible(&mousedev->mutex);
431 if (mousedev->is_mixdev)
432 mixdev_open_devices();
433 else if (!mousedev->exist)
435 else if (!mousedev->open++) {
436 retval = input_open_device(&mousedev->handle);
441 mutex_unlock(&mousedev->mutex);
445 static void mousedev_close_device(struct mousedev *mousedev)
447 mutex_lock(&mousedev->mutex);
449 if (mousedev->is_mixdev)
450 mixdev_close_devices();
451 else if (mousedev->exist && !--mousedev->open)
452 input_close_device(&mousedev->handle);
454 mutex_unlock(&mousedev->mutex);
458 * Open all available devices so they can all be multiplexed in one.
459 * stream. Note that this function is called with mousedev_mix->mutex
462 static void mixdev_open_devices(void)
464 struct mousedev *mousedev;
466 if (mousedev_mix->open++)
469 list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) {
470 if (!mousedev->opened_by_mixdev) {
471 if (mousedev_open_device(mousedev))
474 mousedev->opened_by_mixdev = true;
480 * Close all devices that were opened as part of multiplexed
481 * device. Note that this function is called with mousedev_mix->mutex
484 static void mixdev_close_devices(void)
486 struct mousedev *mousedev;
488 if (--mousedev_mix->open)
491 list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) {
492 if (mousedev->opened_by_mixdev) {
493 mousedev->opened_by_mixdev = false;
494 mousedev_close_device(mousedev);
500 static void mousedev_attach_client(struct mousedev *mousedev,
501 struct mousedev_client *client)
503 spin_lock(&mousedev->client_lock);
504 list_add_tail_rcu(&client->node, &mousedev->client_list);
505 spin_unlock(&mousedev->client_lock);
508 static void mousedev_detach_client(struct mousedev *mousedev,
509 struct mousedev_client *client)
511 spin_lock(&mousedev->client_lock);
512 list_del_rcu(&client->node);
513 spin_unlock(&mousedev->client_lock);
517 static int mousedev_release(struct inode *inode, struct file *file)
519 struct mousedev_client *client = file->private_data;
520 struct mousedev *mousedev = client->mousedev;
522 mousedev_detach_client(mousedev, client);
525 mousedev_close_device(mousedev);
526 put_device(&mousedev->dev);
531 static int mousedev_open(struct inode *inode, struct file *file)
533 struct mousedev_client *client;
534 struct mousedev *mousedev;
537 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
538 if (imajor(inode) == MISC_MAJOR)
539 mousedev = mousedev_mix;
542 mousedev = container_of(inode->i_cdev, struct mousedev, cdev);
544 client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL);
548 spin_lock_init(&client->packet_lock);
549 client->pos_x = xres / 2;
550 client->pos_y = yres / 2;
551 client->mousedev = mousedev;
552 mousedev_attach_client(mousedev, client);
554 error = mousedev_open_device(mousedev);
556 goto err_free_client;
558 file->private_data = client;
559 nonseekable_open(inode, file);
561 get_device(&mousedev->dev);
565 mousedev_detach_client(mousedev, client);
570 static inline int mousedev_limit_delta(int delta, int limit)
572 return delta > limit ? limit : (delta < -limit ? -limit : delta);
575 static void mousedev_packet(struct mousedev_client *client,
576 signed char *ps2_data)
578 struct mousedev_motion *p = &client->packets[client->tail];
581 ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
582 ps2_data[1] = mousedev_limit_delta(p->dx, 127);
583 ps2_data[2] = mousedev_limit_delta(p->dy, 127);
584 p->dx -= ps2_data[1];
585 p->dy -= ps2_data[2];
587 switch (client->mode) {
588 case MOUSEDEV_EMUL_EXPS:
589 ps2_data[3] = mousedev_limit_delta(p->dz, 7);
590 p->dz -= ps2_data[3];
591 ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
595 case MOUSEDEV_EMUL_IMPS:
597 ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
598 ps2_data[3] = mousedev_limit_delta(p->dz, 127);
599 p->dz -= ps2_data[3];
603 case MOUSEDEV_EMUL_PS2:
606 ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
612 if (!p->dx && !p->dy && !p->dz) {
613 if (client->tail == client->head) {
615 client->last_buttons = p->buttons;
617 client->tail = (client->tail + 1) % PACKET_QUEUE_LEN;
621 static void mousedev_generate_response(struct mousedev_client *client,
624 client->ps2[0] = 0xfa; /* ACK */
628 case 0xeb: /* Poll */
629 mousedev_packet(client, &client->ps2[1]);
630 client->bufsiz++; /* account for leading ACK */
633 case 0xf2: /* Get ID */
634 switch (client->mode) {
635 case MOUSEDEV_EMUL_PS2:
638 case MOUSEDEV_EMUL_IMPS:
641 case MOUSEDEV_EMUL_EXPS:
648 case 0xe9: /* Get info */
649 client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200;
653 case 0xff: /* Reset */
654 client->impsseq = client->imexseq = 0;
655 client->mode = MOUSEDEV_EMUL_PS2;
656 client->ps2[1] = 0xaa; client->ps2[2] = 0x00;
664 client->buffer = client->bufsiz;
667 static ssize_t mousedev_write(struct file *file, const char __user *buffer,
668 size_t count, loff_t *ppos)
670 struct mousedev_client *client = file->private_data;
674 for (i = 0; i < count; i++) {
676 if (get_user(c, buffer + i))
679 spin_lock_irq(&client->packet_lock);
681 if (c == mousedev_imex_seq[client->imexseq]) {
682 if (++client->imexseq == MOUSEDEV_SEQ_LEN) {
684 client->mode = MOUSEDEV_EMUL_EXPS;
689 if (c == mousedev_imps_seq[client->impsseq]) {
690 if (++client->impsseq == MOUSEDEV_SEQ_LEN) {
692 client->mode = MOUSEDEV_EMUL_IMPS;
697 mousedev_generate_response(client, c);
699 spin_unlock_irq(&client->packet_lock);
702 kill_fasync(&client->fasync, SIGIO, POLL_IN);
703 wake_up_interruptible(&client->mousedev->wait);
708 static ssize_t mousedev_read(struct file *file, char __user *buffer,
709 size_t count, loff_t *ppos)
711 struct mousedev_client *client = file->private_data;
712 struct mousedev *mousedev = client->mousedev;
713 signed char data[sizeof(client->ps2)];
716 if (!client->ready && !client->buffer && mousedev->exist &&
717 (file->f_flags & O_NONBLOCK))
720 retval = wait_event_interruptible(mousedev->wait,
721 !mousedev->exist || client->ready || client->buffer);
725 if (!mousedev->exist)
728 spin_lock_irq(&client->packet_lock);
730 if (!client->buffer && client->ready) {
731 mousedev_packet(client, client->ps2);
732 client->buffer = client->bufsiz;
735 if (count > client->buffer)
736 count = client->buffer;
738 memcpy(data, client->ps2 + client->bufsiz - client->buffer, count);
739 client->buffer -= count;
741 spin_unlock_irq(&client->packet_lock);
743 if (copy_to_user(buffer, data, count))
749 /* No kernel lock - fine */
750 static unsigned int mousedev_poll(struct file *file, poll_table *wait)
752 struct mousedev_client *client = file->private_data;
753 struct mousedev *mousedev = client->mousedev;
756 poll_wait(file, &mousedev->wait, wait);
758 mask = mousedev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR;
759 if (client->ready || client->buffer)
760 mask |= POLLIN | POLLRDNORM;
765 static const struct file_operations mousedev_fops = {
766 .owner = THIS_MODULE,
767 .read = mousedev_read,
768 .write = mousedev_write,
769 .poll = mousedev_poll,
770 .open = mousedev_open,
771 .release = mousedev_release,
772 .fasync = mousedev_fasync,
773 .llseek = noop_llseek,
777 * Mark device non-existent. This disables writes, ioctls and
778 * prevents new users from opening the device. Already posted
779 * blocking reads will stay, however new ones will fail.
781 static void mousedev_mark_dead(struct mousedev *mousedev)
783 mutex_lock(&mousedev->mutex);
784 mousedev->exist = false;
785 mutex_unlock(&mousedev->mutex);
789 * Wake up users waiting for IO so they can disconnect from
792 static void mousedev_hangup(struct mousedev *mousedev)
794 struct mousedev_client *client;
796 spin_lock(&mousedev->client_lock);
797 list_for_each_entry(client, &mousedev->client_list, node)
798 kill_fasync(&client->fasync, SIGIO, POLL_HUP);
799 spin_unlock(&mousedev->client_lock);
801 wake_up_interruptible(&mousedev->wait);
804 static void mousedev_cleanup(struct mousedev *mousedev)
806 struct input_handle *handle = &mousedev->handle;
808 mousedev_mark_dead(mousedev);
809 mousedev_hangup(mousedev);
811 cdev_del(&mousedev->cdev);
813 /* mousedev is marked dead so no one else accesses mousedev->open */
815 input_close_device(handle);
818 static int mousedev_reserve_minor(bool mixdev)
823 minor = input_get_new_minor(MOUSEDEV_MIX, 1, false);
825 pr_err("failed to reserve mixdev minor: %d\n", minor);
827 minor = input_get_new_minor(MOUSEDEV_MINOR_BASE,
828 MOUSEDEV_MINORS, true);
830 pr_err("failed to reserve new minor: %d\n", minor);
836 static struct mousedev *mousedev_create(struct input_dev *dev,
837 struct input_handler *handler,
840 struct mousedev *mousedev;
844 minor = mousedev_reserve_minor(mixdev);
850 mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL);
856 INIT_LIST_HEAD(&mousedev->client_list);
857 INIT_LIST_HEAD(&mousedev->mixdev_node);
858 spin_lock_init(&mousedev->client_lock);
859 mutex_init(&mousedev->mutex);
860 lockdep_set_subclass(&mousedev->mutex,
861 mixdev ? SINGLE_DEPTH_NESTING : 0);
862 init_waitqueue_head(&mousedev->wait);
865 dev_set_name(&mousedev->dev, "mice");
868 /* Normalize device number if it falls into legacy range */
869 if (dev_no < MOUSEDEV_MINOR_BASE + MOUSEDEV_MINORS)
870 dev_no -= MOUSEDEV_MINOR_BASE;
871 dev_set_name(&mousedev->dev, "mouse%d", dev_no);
874 mousedev->exist = true;
875 mousedev->is_mixdev = mixdev;
876 mousedev->handle.dev = input_get_device(dev);
877 mousedev->handle.name = dev_name(&mousedev->dev);
878 mousedev->handle.handler = handler;
879 mousedev->handle.private = mousedev;
881 mousedev->dev.class = &input_class;
883 mousedev->dev.parent = &dev->dev;
884 mousedev->dev.devt = MKDEV(INPUT_MAJOR, minor);
885 mousedev->dev.release = mousedev_free;
886 device_initialize(&mousedev->dev);
889 error = input_register_handle(&mousedev->handle);
891 goto err_free_mousedev;
894 cdev_init(&mousedev->cdev, &mousedev_fops);
895 error = cdev_add(&mousedev->cdev, mousedev->dev.devt, 1);
897 goto err_unregister_handle;
899 error = device_add(&mousedev->dev);
901 goto err_cleanup_mousedev;
905 err_cleanup_mousedev:
906 mousedev_cleanup(mousedev);
907 err_unregister_handle:
909 input_unregister_handle(&mousedev->handle);
911 put_device(&mousedev->dev);
913 input_free_minor(minor);
915 return ERR_PTR(error);
918 static void mousedev_destroy(struct mousedev *mousedev)
920 device_del(&mousedev->dev);
921 mousedev_cleanup(mousedev);
922 input_free_minor(MINOR(mousedev->dev.devt));
923 if (!mousedev->is_mixdev)
924 input_unregister_handle(&mousedev->handle);
925 put_device(&mousedev->dev);
928 static int mixdev_add_device(struct mousedev *mousedev)
932 retval = mutex_lock_interruptible(&mousedev_mix->mutex);
936 if (mousedev_mix->open) {
937 retval = mousedev_open_device(mousedev);
941 mousedev->opened_by_mixdev = true;
944 get_device(&mousedev->dev);
945 list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list);
948 mutex_unlock(&mousedev_mix->mutex);
952 static void mixdev_remove_device(struct mousedev *mousedev)
954 mutex_lock(&mousedev_mix->mutex);
956 if (mousedev->opened_by_mixdev) {
957 mousedev->opened_by_mixdev = false;
958 mousedev_close_device(mousedev);
961 list_del_init(&mousedev->mixdev_node);
962 mutex_unlock(&mousedev_mix->mutex);
964 put_device(&mousedev->dev);
967 static int mousedev_connect(struct input_handler *handler,
968 struct input_dev *dev,
969 const struct input_device_id *id)
971 struct mousedev *mousedev;
974 mousedev = mousedev_create(dev, handler, false);
975 if (IS_ERR(mousedev))
976 return PTR_ERR(mousedev);
978 error = mixdev_add_device(mousedev);
980 mousedev_destroy(mousedev);
987 static void mousedev_disconnect(struct input_handle *handle)
989 struct mousedev *mousedev = handle->private;
991 mixdev_remove_device(mousedev);
992 mousedev_destroy(mousedev);
995 static const struct input_device_id mousedev_ids[] = {
997 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
998 INPUT_DEVICE_ID_MATCH_KEYBIT |
999 INPUT_DEVICE_ID_MATCH_RELBIT,
1000 .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) },
1001 .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) },
1002 .relbit = { BIT_MASK(REL_X) | BIT_MASK(REL_Y) },
1003 }, /* A mouse like device, at least one button,
1004 two relative axes */
1006 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1007 INPUT_DEVICE_ID_MATCH_RELBIT,
1008 .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) },
1009 .relbit = { BIT_MASK(REL_WHEEL) },
1010 }, /* A separate scrollwheel */
1012 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1013 INPUT_DEVICE_ID_MATCH_KEYBIT |
1014 INPUT_DEVICE_ID_MATCH_ABSBIT,
1015 .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) },
1016 .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) },
1017 .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) },
1018 }, /* A tablet like device, at least touch detection,
1019 two absolute axes */
1021 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1022 INPUT_DEVICE_ID_MATCH_KEYBIT |
1023 INPUT_DEVICE_ID_MATCH_ABSBIT,
1024 .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) },
1025 .keybit = { [BIT_WORD(BTN_TOOL_FINGER)] =
1026 BIT_MASK(BTN_TOOL_FINGER) },
1027 .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
1028 BIT_MASK(ABS_PRESSURE) |
1029 BIT_MASK(ABS_TOOL_WIDTH) },
1032 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1033 INPUT_DEVICE_ID_MATCH_KEYBIT |
1034 INPUT_DEVICE_ID_MATCH_ABSBIT,
1035 .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) },
1036 .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) },
1037 .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) },
1038 }, /* Mouse-like device with absolute X and Y but ordinary
1039 clicks, like hp ILO2 High Performance mouse */
1041 { }, /* Terminating entry */
1044 MODULE_DEVICE_TABLE(input, mousedev_ids);
1046 static struct input_handler mousedev_handler = {
1047 .event = mousedev_event,
1048 .connect = mousedev_connect,
1049 .disconnect = mousedev_disconnect,
1050 .legacy_minors = true,
1051 .minor = MOUSEDEV_MINOR_BASE,
1053 .id_table = mousedev_ids,
1056 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
1057 #include <linux/miscdevice.h>
1059 static struct miscdevice psaux_mouse = {
1060 .minor = PSMOUSE_MINOR,
1062 .fops = &mousedev_fops,
1065 static bool psaux_registered;
1067 static void __init mousedev_psaux_register(void)
1071 error = misc_register(&psaux_mouse);
1073 pr_warn("could not register psaux device, error: %d\n",
1076 psaux_registered = true;
1079 static void __exit mousedev_psaux_unregister(void)
1081 if (psaux_registered)
1082 misc_deregister(&psaux_mouse);
1085 static inline void mousedev_psaux_register(void) { }
1086 static inline void mousedev_psaux_unregister(void) { }
1089 static int __init mousedev_init(void)
1093 mousedev_mix = mousedev_create(NULL, &mousedev_handler, true);
1094 if (IS_ERR(mousedev_mix))
1095 return PTR_ERR(mousedev_mix);
1097 error = input_register_handler(&mousedev_handler);
1099 mousedev_destroy(mousedev_mix);
1103 mousedev_psaux_register();
1105 pr_info("PS/2 mouse device common for all mice\n");
1110 static void __exit mousedev_exit(void)
1112 mousedev_psaux_unregister();
1113 input_unregister_handler(&mousedev_handler);
1114 mousedev_destroy(mousedev_mix);
1117 module_init(mousedev_init);
1118 module_exit(mousedev_exit);