www.pudn.com > usbold11.rar > input.c
/*
* input.c Version 0.1
*
* Copyright (c) 1999 Vojtech Pavlik
*
* The input layer module itself
*
* Sponsored by SuSE
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Should you need to contact me, the author, you can do so either by
* e-mail - mail your message to , or by paper mail:
* Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
*/
#include
#include
#include
#include
#include
MODULE_AUTHOR("Vojtech Pavlik ");
#ifndef MODULE
EXPORT_SYMBOL(input_register_device);
EXPORT_SYMBOL(input_unregister_device);
EXPORT_SYMBOL(input_register_handler);
EXPORT_SYMBOL(input_unregister_handler);
EXPORT_SYMBOL(input_open_device);
EXPORT_SYMBOL(input_close_device);
EXPORT_SYMBOL(input_event);
#endif
static struct input_dev *input_dev = NULL;
static struct input_handler *input_handler = NULL;
static int input_number = 0;
void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
struct input_handle *handle = dev->handle;
/*
* Filter non-events, and bad input values out.
*/
if (type > EV_MAX || !test_bit(type, dev->evbit))
return;
switch (type) {
case EV_KEY:
if (code > KEY_MAX || !test_bit(code, dev->keybit) || !!test_bit(code, dev->key) == value)
return;
if (value == 2) break;
change_bit(code, dev->key);
if (test_bit(EV_REP, dev->evbit) && dev->timer.function) {
if (value) {
mod_timer(&dev->timer, jiffies + dev->rep[REP_DELAY]);
dev->repeat_key = code;
break;
}
if (dev->repeat_key == code)
del_timer(&dev->timer);
}
break;
case EV_ABS:
if (code > ABS_MAX || !test_bit(code, dev->absbit) || (value == dev->abs[code]))
return;
dev->abs[code] = value;
break;
case EV_REL:
if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0))
return;
break;
case EV_LED:
if (code > LED_MAX || !test_bit(code, dev->ledbit) || !!test_bit(code, dev->led) == value)
return;
change_bit(code, dev->led);
if (dev->event) dev->event(dev, type, code, value);
break;
case EV_SND:
if (code > SND_MAX || !test_bit(code, dev->sndbit) || !!test_bit(code, dev->snd) == value)
return;
change_bit(code, dev->snd);
if (dev->event) dev->event(dev, type, code, value);
break;
case EV_REP:
if (code > REP_MAX || dev->rep[code] == value) return;
dev->rep[code] = value;
if (dev->event) dev->event(dev, type, code, value);
break;
}
/*
* Add randomness.
*/
#if 0 /* BUG */
add_input_randomness(((unsigned long) dev) ^ (type << 24) ^ (code << 16) ^ value);
#endif
/*
* Distribute the event to handler modules.
*/
while (handle) {
handle->handler->event(handle, type, code, value);
handle = handle->dnext;
}
}
static void input_repeat_key(unsigned long data)
{
struct input_dev *dev = (void *) data;
input_event(dev, EV_KEY, dev->repeat_key, 2);
mod_timer(&dev->timer, jiffies + dev->rep[REP_PERIOD]);
}
void input_register_device(struct input_dev *dev)
{
struct input_handler *handler = input_handler;
/*
* Initialize repeat timer to default values.
*/
init_timer(&dev->timer);
dev->timer.data = (long) dev;
dev->timer.function = input_repeat_key;
dev->rep[REP_DELAY] = HZ/4;
dev->rep[REP_PERIOD] = HZ/33;
/*
* Add the device.
*/
MOD_INC_USE_COUNT;
dev->number = input_number++;
dev->next = input_dev;
input_dev = dev;
/*
* Notify handlers.
*/
while (handler) {
handler->connect(handler, dev);
handler = handler->next;
}
}
void input_unregister_device(struct input_dev *dev)
{
struct input_handle *handle = dev->handle;
struct input_dev **devptr = &input_dev;
/*
* Kill any pending repeat timers.
*/
del_timer(&dev->timer);
/*
* Notify handlers.
*/
while (handle) {
handle->handler->disconnect(handle);
handle = handle->dnext;
}
/*
* Remove the device.
*/
while (*devptr && (*devptr != dev))
devptr = &((*devptr)->next);
*devptr = (*devptr)->next;
input_number--;
MOD_DEC_USE_COUNT;
}
void input_register_handler(struct input_handler *handler)
{
struct input_dev *dev = input_dev;
/*
* Add the handler.
*/
handler->next = input_handler;
input_handler = handler;
/*
* Notify it about all existing devices.
*/
while (dev) {
handler->connect(handler, dev);
dev = dev->next;
}
}
void input_unregister_handler(struct input_handler *handler)
{
struct input_handler **handlerptr = &input_handler;
struct input_handle *handle = handler->handle;
/*
* Tell the handler to disconnect from all devices it keeps open.
*/
while (handle) {
handler->disconnect(handle);
handle = handle->hnext;
}
/*
* Remove it.
*/
while (*handlerptr && (*handlerptr != handler))
handlerptr = &((*handlerptr)->next);
*handlerptr = (*handlerptr)->next;
}
void input_open_device(struct input_handle *handle)
{
handle->dnext = handle->dev->handle;
handle->hnext = handle->handler->handle;
handle->dev->handle = handle;
handle->handler->handle = handle;
if (handle->dev->open)
handle->dev->open(handle->dev);
}
void input_close_device(struct input_handle *handle)
{
struct input_handle **handleptr;
if (handle->dev->close)
handle->dev->close(handle->dev);
/*
* Remove from device list of handles.
*/
handleptr = &handle->dev->handle;
while (*handleptr && (*handleptr != handle))
handleptr = &((*handleptr)->dnext);
*handleptr = (*handleptr)->dnext;
/*
* Remove from handler list of handles.
*/
handleptr = &handle->handler->handle;
while (*handleptr && (*handleptr != handle))
handleptr = &((*handleptr)->hnext);
*handleptr = (*handleptr)->hnext;
}
#ifdef MODULE
int init_module(void)
#else
int __init input_init(void)
#endif
{
#ifndef MODULE
#ifdef CONFIG_INPUT_KEYBDEV
keybdev_init();
#endif
#ifdef CONFIG_INPUT_MOUSEDEV
mousedev_init();
#endif
#ifdef CONFIG_INPUT_JOYDEV
joydev_init();
#endif
#ifdef CONFIG_INPUT_EVDEV
evdev_init();
#endif
#endif
return 0;
}
#ifdef MODULE
void cleanup_module(void)
{
}
#endif