patch-2.4.0-test2 linux/drivers/char/joystick/serio.c

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diff -u --recursive --new-file v2.4.0-test1/linux/drivers/char/joystick/serio.c linux/drivers/char/joystick/serio.c
@@ -0,0 +1,132 @@
+/*
+ * $Id: serio.c,v 1.5 2000/06/04 17:44:59 vojtech Exp $
+ *
+ *  Copyright (c) 1999-2000 Vojtech Pavlik
+ *
+ *  Sponsored by SuSE
+ */
+
+/*
+ *  The Serio abstraction module
+ */
+
+/*
+ * 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@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
+ */
+
+#include <linux/stddef.h>
+#include <linux/module.h>
+#include <linux/serio.h>
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+
+EXPORT_SYMBOL(serio_register_port);
+EXPORT_SYMBOL(serio_unregister_port);
+EXPORT_SYMBOL(serio_register_device);
+EXPORT_SYMBOL(serio_unregister_device);
+EXPORT_SYMBOL(serio_open);
+EXPORT_SYMBOL(serio_close);
+EXPORT_SYMBOL(serio_rescan);
+
+static struct serio *serio_list = NULL;
+static struct serio_dev *serio_dev = NULL;
+static int serio_number = 0;
+
+static void serio_find_dev(struct serio *serio)
+{
+        struct serio_dev *dev = serio_dev;
+
+        while (dev && !serio->dev) {
+		if (dev->connect)
+                	dev->connect(serio, dev);
+                dev = dev->next;
+        }
+}
+
+void serio_rescan(struct serio *serio)
+{
+	if (serio->dev && serio->dev->disconnect)
+		serio->dev->disconnect(serio);
+	serio_find_dev(serio);
+}
+
+void serio_register_port(struct serio *serio)
+{
+	serio->number = serio_number++;
+	serio->next = serio_list;	
+	serio_list = serio;
+	serio_find_dev(serio);
+}
+
+void serio_unregister_port(struct serio *serio)
+{
+        struct serio **serioptr = &serio_list;
+
+        while (*serioptr && (*serioptr != serio)) serioptr = &((*serioptr)->next);
+        *serioptr = (*serioptr)->next;
+
+	if (serio->dev && serio->dev->disconnect)
+		serio->dev->disconnect(serio);
+
+	serio_number--;
+}
+
+void serio_register_device(struct serio_dev *dev)
+{
+	struct serio *serio = serio_list;
+
+	dev->next = serio_dev;	
+	serio_dev = dev;
+
+	while (serio) {
+		if (!serio->dev && dev->connect)
+			dev->connect(serio, dev);
+		serio = serio->next;
+	}
+}
+
+void serio_unregister_device(struct serio_dev *dev)
+{
+        struct serio_dev **devptr = &serio_dev;
+	struct serio *serio = serio_list;
+
+        while (*devptr && (*devptr != dev)) devptr = &((*devptr)->next);
+        *devptr = (*devptr)->next;
+
+	while (serio) {
+		if (serio->dev == dev && dev->disconnect)
+			dev->disconnect(serio);
+		serio_find_dev(serio);
+		serio = serio->next;
+	}
+}
+
+int serio_open(struct serio *serio, struct serio_dev *dev)
+{
+	if (serio->open(serio))
+		return -1;
+	serio->dev = dev;
+	return 0;
+}
+
+void serio_close(struct serio *serio)
+{
+	serio->close(serio);
+	serio->dev = NULL;
+}

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