patch-2.3.36 linux/drivers/usb/input.c

• Lines: 336
• Date: Sun Jan 2 12:12:59 2000
• Orig file: v2.3.35/linux/drivers/usb/input.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.35/linux/drivers/usb/input.c linux/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