diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2000-02-05 06:47:02 +0000 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2000-02-05 06:47:02 +0000 |
commit | 99a7e12f34b3661a0d1354eef83a0eef4df5e34c (patch) | |
tree | 3560aca9ca86792f9ab7bd87861ea143a1b3c7a3 /drivers/usb/input.c | |
parent | e73a04659c0b8cdee4dd40e58630e2cf63afb316 (diff) |
Merge with Linux 2.3.38.
Diffstat (limited to 'drivers/usb/input.c')
-rw-r--r-- | drivers/usb/input.c | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/drivers/usb/input.c b/drivers/usb/input.c new file mode 100644 index 000000000..fa370c9af --- /dev/null +++ b/drivers/usb/input.c @@ -0,0 +1,335 @@ +/* + * 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 <vojtech@suse.cz>, or by paper mail: + * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic + */ + +#include <linux/init.h> +#include <linux/input.h> +#include <linux/module.h> +#include <linux/config.h> +#include <linux/random.h> + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); + +#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 |