/* * linux/kernel/chr_drv/mouse.c * * Generic mouse open routine by Johan Myreen * * Based on code from Linus * * Teemu Rantanen's Microsoft Busmouse support and Derrick Cole's *   changes incorporated into 0.97pl4 *   by Peter Cervasio (pete%q106fm.uucp@wupost.wustl.edu) (08SEP92) *   See busmouse.c for particulars. * * Made things a lot mode modular - easy to compile in just one or two * of the mouse drivers, as they are now completely independent. Linus. */#include <linux/fs.h>#include <linux/errno.h>#include <linux/mouse.h>#include <linux/config.h>#include <linux/kernel.h>#include <linux/major.h>/* * note that you can remove any or all of the drivers by undefining * the minor values in <linux/mouse.h> */extern struct file_operations bus_mouse_fops;extern struct file_operations psaux_fops;extern struct file_operations ms_bus_mouse_fops;extern struct file_operations atixl_busmouse_fops;extern unsigned long bus_mouse_init(unsigned long);extern unsigned long psaux_init(unsigned long);extern unsigned long ms_bus_mouse_init(unsigned long);extern unsigned long atixl_busmouse_init(unsigned long);static int mouse_open(struct inode * inode, struct file * file){	int minor = MINOR(inode->i_rdev);	switch (minor) {#ifdef CONFIG_BUSMOUSE		case BUSMOUSE_MINOR:	                file->f_op = &bus_mouse_fops;	                break;#endif#if defined CONFIG_PSMOUSE || defined CONFIG_82C710_MOUSE		case PSMOUSE_MINOR:	                file->f_op = &psaux_fops;	                break;#endif#ifdef CONFIG_MS_BUSMOUSE		case MS_BUSMOUSE_MINOR:		        file->f_op = &ms_bus_mouse_fops;		        break;#endif#ifdef CONFIG_ATIXL_BUSMOUSE		case ATIXL_BUSMOUSE_MINOR:			file->f_op = &atixl_busmouse_fops;			break;#endif		default:			return -ENODEV;	}        return file->f_op->open(inode,file);}static struct file_operations mouse_fops = {        NULL,		/* seek */	NULL,		/* read */	NULL,		/* write */	NULL,		/* readdir */	NULL,		/* select */	NULL,		/* ioctl */	NULL,		/* mmap */        mouse_open,        NULL		/* release */};unsigned long mouse_init(unsigned long kmem_start){#ifdef CONFIG_BUSMOUSE	kmem_start = bus_mouse_init(kmem_start);#endif#if defined CONFIG_PSMOUSE || defined CONFIG_82C710_MOUSE	kmem_start = psaux_init(kmem_start);#endif#ifdef CONFIG_MS_BUSMOUSE	kmem_start = ms_bus_mouse_init(kmem_start);#endif#ifdef CONFIG_ATIXL_BUSMOUSE 	kmem_start = atixl_busmouse_init(kmem_start);#endif	if (register_chrdev(MOUSE_MAJOR,"mouse",&mouse_fops))		printk("unable to get major %d for mouse devices\n",		       MOUSE_MAJOR);	return kmem_start;}