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 MOUSEDEV_MINOR_BASE 32
13 #define MOUSEDEV_MINORS 32
14 #define MOUSEDEV_MIX 31
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/random.h>
23 #include <linux/major.h>
24 #include <linux/device.h>
25 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
26 #include <linux/miscdevice.h>
29 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
30 MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces");
31 MODULE_LICENSE("GPL");
33 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X
34 #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024
36 #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y
37 #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768
40 static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X;
41 module_param(xres, uint, 0644);
42 MODULE_PARM_DESC(xres, "Horizontal screen resolution");
44 static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y;
45 module_param(yres, uint, 0644);
46 MODULE_PARM_DESC(yres, "Vertical screen resolution");
48 static unsigned tap_time = 200;
49 module_param(tap_time, uint, 0644);
50 MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)");
52 struct mousedev_hw_data {
56 unsigned long buttons;
64 struct input_handle handle;
65 wait_queue_head_t wait;
66 struct list_head client_list;
67 spinlock_t client_lock; /* protects client_list */
71 struct list_head mixdev_node;
74 struct mousedev_hw_data packet;
75 unsigned int pkt_count;
76 int old_x[4], old_y[4];
87 struct mousedev_motion {
89 unsigned long buttons;
92 #define PACKET_QUEUE_LEN 16
93 struct mousedev_client {
94 struct fasync_struct *fasync;
95 struct mousedev *mousedev;
96 struct list_head node;
98 struct mousedev_motion packets[PACKET_QUEUE_LEN];
99 unsigned int head, tail;
100 spinlock_t packet_lock;
104 unsigned char ready, buffer, bufsiz;
105 unsigned char imexseq, impsseq;
106 enum mousedev_emul mode;
107 unsigned long last_buttons;
110 #define MOUSEDEV_SEQ_LEN 6
112 static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 };
113 static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 };
115 static struct input_handler mousedev_handler;
117 static struct mousedev *mousedev_table[MOUSEDEV_MINORS];
118 static DEFINE_MUTEX(mousedev_table_mutex);
119 static struct mousedev *mousedev_mix;
120 static LIST_HEAD(mousedev_mix_list);
122 static void mixdev_open_devices(void);
123 static void mixdev_close_devices(void);
125 #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
126 #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
128 static void mousedev_touchpad_event(struct input_dev *dev,
129 struct mousedev *mousedev,
130 unsigned int code, int value)
133 enum { FRACTION_DENOM = 128 };
139 if (mousedev->touch && mousedev->pkt_count >= 2) {
140 size = dev->absmax[ABS_X] - dev->absmin[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 to keep the same scale */
155 size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
158 tmp = -((value - fy(2)) * 256 * FRACTION_DENOM) / size;
159 tmp += mousedev->frac_dy;
160 mousedev->packet.dy = tmp / FRACTION_DENOM;
161 mousedev->frac_dy = tmp -
162 mousedev->packet.dy * FRACTION_DENOM;
168 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev,
169 unsigned int code, int value)
176 size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
179 if (value > dev->absmax[ABS_X])
180 value = dev->absmax[ABS_X];
181 if (value < dev->absmin[ABS_X])
182 value = dev->absmin[ABS_X];
184 ((value - dev->absmin[ABS_X]) * xres) / size;
185 mousedev->packet.abs_event = 1;
189 size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y];
192 if (value > dev->absmax[ABS_Y])
193 value = dev->absmax[ABS_Y];
194 if (value < dev->absmin[ABS_Y])
195 value = dev->absmin[ABS_Y];
196 mousedev->packet.y = yres -
197 ((value - dev->absmin[ABS_Y]) * yres) / size;
198 mousedev->packet.abs_event = 1;
203 static void mousedev_rel_event(struct mousedev *mousedev,
204 unsigned int code, int value)
208 mousedev->packet.dx += value;
212 mousedev->packet.dy -= value;
216 mousedev->packet.dz -= value;
221 static void mousedev_key_event(struct mousedev *mousedev,
222 unsigned int code, int value)
230 case BTN_LEFT: index = 0; break;
234 case BTN_RIGHT: index = 1; break;
239 case BTN_MIDDLE: index = 2; break;
243 case BTN_SIDE: index = 3; break;
246 case BTN_EXTRA: index = 4; break;
252 set_bit(index, &mousedev->packet.buttons);
253 set_bit(index, &mousedev_mix->packet.buttons);
255 clear_bit(index, &mousedev->packet.buttons);
256 clear_bit(index, &mousedev_mix->packet.buttons);
260 static void mousedev_notify_readers(struct mousedev *mousedev,
261 struct mousedev_hw_data *packet)
263 struct mousedev_client *client;
264 struct mousedev_motion *p;
265 unsigned int new_head;
266 int wake_readers = 0;
268 list_for_each_entry_rcu(client, &mousedev->client_list, node) {
270 /* Just acquire the lock, interrupts already disabled */
271 spin_lock(&client->packet_lock);
273 p = &client->packets[client->head];
274 if (client->ready && p->buttons != mousedev->packet.buttons) {
275 new_head = (client->head + 1) % PACKET_QUEUE_LEN;
276 if (new_head != client->tail) {
277 p = &client->packets[client->head = new_head];
278 memset(p, 0, sizeof(struct mousedev_motion));
282 if (packet->abs_event) {
283 p->dx += packet->x - client->pos_x;
284 p->dy += packet->y - client->pos_y;
285 client->pos_x = packet->x;
286 client->pos_y = packet->y;
289 client->pos_x += packet->dx;
290 client->pos_x = client->pos_x < 0 ?
291 0 : (client->pos_x >= xres ? xres : client->pos_x);
292 client->pos_y += packet->dy;
293 client->pos_y = client->pos_y < 0 ?
294 0 : (client->pos_y >= yres ? yres : client->pos_y);
299 p->buttons = mousedev->packet.buttons;
301 if (p->dx || p->dy || p->dz ||
302 p->buttons != client->last_buttons)
305 spin_unlock(&client->packet_lock);
308 kill_fasync(&client->fasync, SIGIO, POLL_IN);
314 wake_up_interruptible(&mousedev->wait);
317 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
320 if (mousedev->touch &&
322 mousedev->touch + msecs_to_jiffies(tap_time))) {
324 * Toggle left button to emulate tap.
325 * We rely on the fact that mousedev_mix always has 0
326 * motion packet so we won't mess current position.
328 set_bit(0, &mousedev->packet.buttons);
329 set_bit(0, &mousedev_mix->packet.buttons);
330 mousedev_notify_readers(mousedev, &mousedev_mix->packet);
331 mousedev_notify_readers(mousedev_mix,
332 &mousedev_mix->packet);
333 clear_bit(0, &mousedev->packet.buttons);
334 clear_bit(0, &mousedev_mix->packet.buttons);
336 mousedev->touch = mousedev->pkt_count = 0;
337 mousedev->frac_dx = 0;
338 mousedev->frac_dy = 0;
340 } else if (!mousedev->touch)
341 mousedev->touch = jiffies;
344 static void mousedev_event(struct input_handle *handle,
345 unsigned int type, unsigned int code, int value)
347 struct mousedev *mousedev = handle->private;
352 /* Ignore joysticks */
353 if (test_bit(BTN_TRIGGER, handle->dev->keybit))
356 if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
357 mousedev_touchpad_event(handle->dev,
358 mousedev, code, value);
360 mousedev_abs_event(handle->dev, mousedev, code, value);
365 mousedev_rel_event(mousedev, code, value);
370 if (code == BTN_TOUCH &&
371 test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
372 mousedev_touchpad_touch(mousedev, value);
374 mousedev_key_event(mousedev, code, value);
379 if (code == SYN_REPORT) {
380 if (mousedev->touch) {
381 mousedev->pkt_count++;
383 * Input system eats duplicate events,
384 * but we need all of them to do correct
385 * averaging so apply present one forward
391 mousedev_notify_readers(mousedev, &mousedev->packet);
392 mousedev_notify_readers(mousedev_mix, &mousedev->packet);
394 mousedev->packet.dx = mousedev->packet.dy =
395 mousedev->packet.dz = 0;
396 mousedev->packet.abs_event = 0;
402 static int mousedev_fasync(int fd, struct file *file, int on)
405 struct mousedev_client *client = file->private_data;
407 retval = fasync_helper(fd, file, on, &client->fasync);
409 return retval < 0 ? retval : 0;
412 static void mousedev_free(struct device *dev)
414 struct mousedev *mousedev = container_of(dev, struct mousedev, dev);
419 static int mousedev_open_device(struct mousedev *mousedev)
423 retval = mutex_lock_interruptible(&mousedev->mutex);
427 if (mousedev->minor == MOUSEDEV_MIX)
428 mixdev_open_devices();
429 else if (!mousedev->exist)
431 else if (!mousedev->open++) {
432 retval = input_open_device(&mousedev->handle);
437 mutex_unlock(&mousedev->mutex);
441 static void mousedev_close_device(struct mousedev *mousedev)
443 mutex_lock(&mousedev->mutex);
445 if (mousedev->minor == MOUSEDEV_MIX)
446 mixdev_close_devices();
447 else if (mousedev->exist && !--mousedev->open)
448 input_close_device(&mousedev->handle);
450 mutex_unlock(&mousedev->mutex);
454 * Open all available devices so they can all be multiplexed in one.
455 * stream. Note that this function is called with mousedev_mix->mutex
458 static void mixdev_open_devices(void)
460 struct mousedev *mousedev;
462 if (mousedev_mix->open++)
465 list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) {
466 if (!mousedev->mixdev_open) {
467 if (mousedev_open_device(mousedev))
470 mousedev->mixdev_open = 1;
476 * Close all devices that were opened as part of multiplexed
477 * device. Note that this function is called with mousedev_mix->mutex
480 static void mixdev_close_devices(void)
482 struct mousedev *mousedev;
484 if (--mousedev_mix->open)
487 list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) {
488 if (mousedev->mixdev_open) {
489 mousedev->mixdev_open = 0;
490 mousedev_close_device(mousedev);
496 static void mousedev_attach_client(struct mousedev *mousedev,
497 struct mousedev_client *client)
499 spin_lock(&mousedev->client_lock);
500 list_add_tail_rcu(&client->node, &mousedev->client_list);
501 spin_unlock(&mousedev->client_lock);
503 * We don't use synchronize_rcu() here because read-side
504 * critical section is protected by a spinlock (dev->event_lock)
505 * instead of rcu_read_lock().
510 static void mousedev_detach_client(struct mousedev *mousedev,
511 struct mousedev_client *client)
513 spin_lock(&mousedev->client_lock);
514 list_del_rcu(&client->node);
515 spin_unlock(&mousedev->client_lock);
519 static int mousedev_release(struct inode *inode, struct file *file)
521 struct mousedev_client *client = file->private_data;
522 struct mousedev *mousedev = client->mousedev;
524 mousedev_fasync(-1, file, 0);
525 mousedev_detach_client(mousedev, client);
528 mousedev_close_device(mousedev);
529 put_device(&mousedev->dev);
534 static int mousedev_open(struct inode *inode, struct file *file)
536 struct mousedev_client *client;
537 struct mousedev *mousedev;
541 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
542 if (imajor(inode) == MISC_MAJOR)
546 i = iminor(inode) - MOUSEDEV_MINOR_BASE;
548 if (i >= MOUSEDEV_MINORS)
551 error = mutex_lock_interruptible(&mousedev_table_mutex);
554 mousedev = mousedev_table[i];
556 get_device(&mousedev->dev);
557 mutex_unlock(&mousedev_table_mutex);
562 client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL);
565 goto err_put_mousedev;
568 spin_lock_init(&client->packet_lock);
569 client->pos_x = xres / 2;
570 client->pos_y = yres / 2;
571 client->mousedev = mousedev;
572 mousedev_attach_client(mousedev, client);
574 error = mousedev_open_device(mousedev);
576 goto err_free_client;
578 file->private_data = client;
582 mousedev_detach_client(mousedev, client);
585 put_device(&mousedev->dev);
589 static inline int mousedev_limit_delta(int delta, int limit)
591 return delta > limit ? limit : (delta < -limit ? -limit : delta);
594 static void mousedev_packet(struct mousedev_client *client,
595 signed char *ps2_data)
597 struct mousedev_motion *p = &client->packets[client->tail];
600 ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
601 ps2_data[1] = mousedev_limit_delta(p->dx, 127);
602 ps2_data[2] = mousedev_limit_delta(p->dy, 127);
603 p->dx -= ps2_data[1];
604 p->dy -= ps2_data[2];
606 switch (client->mode) {
607 case MOUSEDEV_EMUL_EXPS:
608 ps2_data[3] = mousedev_limit_delta(p->dz, 7);
609 p->dz -= ps2_data[3];
610 ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
614 case MOUSEDEV_EMUL_IMPS:
616 ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
617 ps2_data[3] = mousedev_limit_delta(p->dz, 127);
618 p->dz -= ps2_data[3];
622 case MOUSEDEV_EMUL_PS2:
625 ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
631 if (!p->dx && !p->dy && !p->dz) {
632 if (client->tail == client->head) {
634 client->last_buttons = p->buttons;
636 client->tail = (client->tail + 1) % PACKET_QUEUE_LEN;
640 static void mousedev_generate_response(struct mousedev_client *client,
643 client->ps2[0] = 0xfa; /* ACK */
647 case 0xeb: /* Poll */
648 mousedev_packet(client, &client->ps2[1]);
649 client->bufsiz++; /* account for leading ACK */
652 case 0xf2: /* Get ID */
653 switch (client->mode) {
654 case MOUSEDEV_EMUL_PS2:
657 case MOUSEDEV_EMUL_IMPS:
660 case MOUSEDEV_EMUL_EXPS:
667 case 0xe9: /* Get info */
668 client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200;
672 case 0xff: /* Reset */
673 client->impsseq = client->imexseq = 0;
674 client->mode = MOUSEDEV_EMUL_PS2;
675 client->ps2[1] = 0xaa; client->ps2[2] = 0x00;
683 client->buffer = client->bufsiz;
686 static ssize_t mousedev_write(struct file *file, const char __user *buffer,
687 size_t count, loff_t *ppos)
689 struct mousedev_client *client = file->private_data;
693 for (i = 0; i < count; i++) {
695 if (get_user(c, buffer + i))
698 spin_lock_irq(&client->packet_lock);
700 if (c == mousedev_imex_seq[client->imexseq]) {
701 if (++client->imexseq == MOUSEDEV_SEQ_LEN) {
703 client->mode = MOUSEDEV_EMUL_EXPS;
708 if (c == mousedev_imps_seq[client->impsseq]) {
709 if (++client->impsseq == MOUSEDEV_SEQ_LEN) {
711 client->mode = MOUSEDEV_EMUL_IMPS;
716 mousedev_generate_response(client, c);
718 spin_unlock_irq(&client->packet_lock);
721 kill_fasync(&client->fasync, SIGIO, POLL_IN);
722 wake_up_interruptible(&client->mousedev->wait);
727 static ssize_t mousedev_read(struct file *file, char __user *buffer,
728 size_t count, loff_t *ppos)
730 struct mousedev_client *client = file->private_data;
731 struct mousedev *mousedev = client->mousedev;
732 signed char data[sizeof(client->ps2)];
735 if (!client->ready && !client->buffer && mousedev->exist &&
736 (file->f_flags & O_NONBLOCK))
739 retval = wait_event_interruptible(mousedev->wait,
740 !mousedev->exist || client->ready || client->buffer);
744 if (!mousedev->exist)
747 spin_lock_irq(&client->packet_lock);
749 if (!client->buffer && client->ready) {
750 mousedev_packet(client, client->ps2);
751 client->buffer = client->bufsiz;
754 if (count > client->buffer)
755 count = client->buffer;
757 memcpy(data, client->ps2 + client->bufsiz - client->buffer, count);
758 client->buffer -= count;
760 spin_unlock_irq(&client->packet_lock);
762 if (copy_to_user(buffer, data, count))
768 /* No kernel lock - fine */
769 static unsigned int mousedev_poll(struct file *file, poll_table *wait)
771 struct mousedev_client *client = file->private_data;
772 struct mousedev *mousedev = client->mousedev;
774 poll_wait(file, &mousedev->wait, wait);
775 return ((client->ready || client->buffer) ? (POLLIN | POLLRDNORM) : 0) |
776 (mousedev->exist ? 0 : (POLLHUP | POLLERR));
779 static const struct file_operations mousedev_fops = {
780 .owner = THIS_MODULE,
781 .read = mousedev_read,
782 .write = mousedev_write,
783 .poll = mousedev_poll,
784 .open = mousedev_open,
785 .release = mousedev_release,
786 .fasync = mousedev_fasync,
789 static int mousedev_install_chrdev(struct mousedev *mousedev)
791 mousedev_table[mousedev->minor] = mousedev;
795 static void mousedev_remove_chrdev(struct mousedev *mousedev)
797 mutex_lock(&mousedev_table_mutex);
798 mousedev_table[mousedev->minor] = NULL;
799 mutex_unlock(&mousedev_table_mutex);
803 * Mark device non-existent. This disables writes, ioctls and
804 * prevents new users from opening the device. Already posted
805 * blocking reads will stay, however new ones will fail.
807 static void mousedev_mark_dead(struct mousedev *mousedev)
809 mutex_lock(&mousedev->mutex);
811 mutex_unlock(&mousedev->mutex);
815 * Wake up users waiting for IO so they can disconnect from
818 static void mousedev_hangup(struct mousedev *mousedev)
820 struct mousedev_client *client;
822 spin_lock(&mousedev->client_lock);
823 list_for_each_entry(client, &mousedev->client_list, node)
824 kill_fasync(&client->fasync, SIGIO, POLL_HUP);
825 spin_unlock(&mousedev->client_lock);
827 wake_up_interruptible(&mousedev->wait);
830 static void mousedev_cleanup(struct mousedev *mousedev)
832 struct input_handle *handle = &mousedev->handle;
834 mousedev_mark_dead(mousedev);
835 mousedev_hangup(mousedev);
836 mousedev_remove_chrdev(mousedev);
838 /* mousedev is marked dead so no one else accesses mousedev->open */
840 input_close_device(handle);
843 static struct mousedev *mousedev_create(struct input_dev *dev,
844 struct input_handler *handler,
847 struct mousedev *mousedev;
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 minor == MOUSEDEV_MIX ? MOUSEDEV_MIX : 0);
862 init_waitqueue_head(&mousedev->wait);
864 if (minor == MOUSEDEV_MIX)
865 strlcpy(mousedev->name, "mice", sizeof(mousedev->name));
867 snprintf(mousedev->name, sizeof(mousedev->name),
870 mousedev->minor = minor;
872 mousedev->handle.dev = dev;
873 mousedev->handle.name = mousedev->name;
874 mousedev->handle.handler = handler;
875 mousedev->handle.private = mousedev;
877 strlcpy(mousedev->dev.bus_id, mousedev->name,
878 sizeof(mousedev->dev.bus_id));
879 mousedev->dev.class = &input_class;
881 mousedev->dev.parent = &dev->dev;
882 mousedev->dev.devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor);
883 mousedev->dev.release = mousedev_free;
884 device_initialize(&mousedev->dev);
886 if (minor != MOUSEDEV_MIX) {
887 error = input_register_handle(&mousedev->handle);
889 goto err_free_mousedev;
892 error = mousedev_install_chrdev(mousedev);
894 goto err_unregister_handle;
896 error = device_add(&mousedev->dev);
898 goto err_cleanup_mousedev;
902 err_cleanup_mousedev:
903 mousedev_cleanup(mousedev);
904 err_unregister_handle:
905 if (minor != MOUSEDEV_MIX)
906 input_unregister_handle(&mousedev->handle);
908 put_device(&mousedev->dev);
910 return ERR_PTR(error);
913 static void mousedev_destroy(struct mousedev *mousedev)
915 device_del(&mousedev->dev);
916 mousedev_cleanup(mousedev);
917 if (mousedev->minor != MOUSEDEV_MIX)
918 input_unregister_handle(&mousedev->handle);
919 put_device(&mousedev->dev);
922 static int mixdev_add_device(struct mousedev *mousedev)
926 retval = mutex_lock_interruptible(&mousedev_mix->mutex);
930 if (mousedev_mix->open) {
931 retval = mousedev_open_device(mousedev);
935 mousedev->mixdev_open = 1;
938 get_device(&mousedev->dev);
939 list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list);
942 mutex_unlock(&mousedev_mix->mutex);
946 static void mixdev_remove_device(struct mousedev *mousedev)
948 mutex_lock(&mousedev_mix->mutex);
950 if (mousedev->mixdev_open) {
951 mousedev->mixdev_open = 0;
952 mousedev_close_device(mousedev);
955 list_del_init(&mousedev->mixdev_node);
956 mutex_unlock(&mousedev_mix->mutex);
958 put_device(&mousedev->dev);
961 static int mousedev_connect(struct input_handler *handler,
962 struct input_dev *dev,
963 const struct input_device_id *id)
965 struct mousedev *mousedev;
969 for (minor = 0; minor < MOUSEDEV_MINORS; minor++)
970 if (!mousedev_table[minor])
973 if (minor == MOUSEDEV_MINORS) {
974 printk(KERN_ERR "mousedev: no more free mousedev devices\n");
978 mousedev = mousedev_create(dev, handler, minor);
979 if (IS_ERR(mousedev))
980 return PTR_ERR(mousedev);
982 error = mixdev_add_device(mousedev);
984 mousedev_destroy(mousedev);
991 static void mousedev_disconnect(struct input_handle *handle)
993 struct mousedev *mousedev = handle->private;
995 mixdev_remove_device(mousedev);
996 mousedev_destroy(mousedev);
999 static const struct input_device_id mousedev_ids[] = {
1001 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1002 INPUT_DEVICE_ID_MATCH_KEYBIT |
1003 INPUT_DEVICE_ID_MATCH_RELBIT,
1004 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
1005 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) },
1006 .relbit = { BIT(REL_X) | BIT(REL_Y) },
1007 }, /* A mouse like device, at least one button,
1008 two relative axes */
1010 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1011 INPUT_DEVICE_ID_MATCH_RELBIT,
1012 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
1013 .relbit = { BIT(REL_WHEEL) },
1014 }, /* A separate scrollwheel */
1016 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1017 INPUT_DEVICE_ID_MATCH_KEYBIT |
1018 INPUT_DEVICE_ID_MATCH_ABSBIT,
1019 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
1020 .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
1021 .absbit = { BIT(ABS_X) | BIT(ABS_Y) },
1022 }, /* A tablet like device, at least touch detection,
1023 two absolute axes */
1025 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
1026 INPUT_DEVICE_ID_MATCH_KEYBIT |
1027 INPUT_DEVICE_ID_MATCH_ABSBIT,
1028 .evbit = { BIT(EV_KEY) | BIT(EV_ABS) },
1029 .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) },
1030 .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) |
1031 BIT(ABS_TOOL_WIDTH) },
1034 { }, /* Terminating entry */
1037 MODULE_DEVICE_TABLE(input, mousedev_ids);
1039 static struct input_handler mousedev_handler = {
1040 .event = mousedev_event,
1041 .connect = mousedev_connect,
1042 .disconnect = mousedev_disconnect,
1043 .fops = &mousedev_fops,
1044 .minor = MOUSEDEV_MINOR_BASE,
1046 .id_table = mousedev_ids,
1049 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
1050 static struct miscdevice psaux_mouse = {
1051 PSMOUSE_MINOR, "psaux", &mousedev_fops
1053 static int psaux_registered;
1056 static int __init mousedev_init(void)
1060 mousedev_mix = mousedev_create(NULL, &mousedev_handler, MOUSEDEV_MIX);
1061 if (IS_ERR(mousedev_mix))
1062 return PTR_ERR(mousedev_mix);
1064 error = input_register_handler(&mousedev_handler);
1066 mousedev_destroy(mousedev_mix);
1070 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
1071 error = misc_register(&psaux_mouse);
1073 printk(KERN_WARNING "mice: could not register psaux device, "
1074 "error: %d\n", error);
1076 psaux_registered = 1;
1079 printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
1084 static void __exit mousedev_exit(void)
1086 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
1087 if (psaux_registered)
1088 misc_deregister(&psaux_mouse);
1090 input_unregister_handler(&mousedev_handler);
1091 mousedev_destroy(mousedev_mix);
1094 module_init(mousedev_init);
1095 module_exit(mousedev_exit);