/*
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/*
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* linux/arch/arm/drivers/char/mouse.c
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* linux/arch/arm/drivers/char/mouse.c
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*
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*
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* Copyright (C) 1995, 1996 Russell King
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* Copyright (C) 1995, 1996 Russell King
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*
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*
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* Medium-level interface for quadrature mouse.
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* Medium-level interface for quadrature mouse.
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*/
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*/
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/signal.h>
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#include <linux/signal.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/mm.h>
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#include <linux/mm.h>
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#include <linux/miscdevice.h>
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#include <linux/miscdevice.h>
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#include <linux/random.h>
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#include <linux/random.h>
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#include <asm/system.h>
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#include <asm/system.h>
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#include <asm/segment.h>
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#include <asm/segment.h>
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#include <asm/io.h>
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#include <asm/io.h>
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#include "mouse.h"
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#include "mouse.h"
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#ifdef CONFIG_RPCMOUSE
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#ifdef CONFIG_RPCMOUSE
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extern void mouse_rpc_init (void);
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extern void mouse_rpc_init (void);
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#endif
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#endif
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static struct wait_queue *mouse_wait;
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static struct wait_queue *mouse_wait;
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static struct fasync_struct *fasyncptr;
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static struct fasync_struct *fasyncptr;
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static char mouse_active;
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static char mouse_active;
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static char mouse_buttons;
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static char mouse_buttons;
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static char mouse_ready;
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static char mouse_ready;
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static int mouse_present;
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static int mouse_present;
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static int mouse_dxpos;
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static int mouse_dxpos;
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static int mouse_dypos;
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static int mouse_dypos;
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/*
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/*
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* a mouse driver just has to interface with these functions
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* a mouse driver just has to interface with these functions
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*/
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*/
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void add_mouse_movement(int dx, int dy)
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void add_mouse_movement(int dx, int dy)
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{
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{
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mouse_dxpos += dx;
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mouse_dxpos += dx;
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mouse_dypos += dy;
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mouse_dypos += dy;
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mouse_ready = 1;
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mouse_ready = 1;
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wake_up(&mouse_wait);
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wake_up(&mouse_wait);
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}
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}
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int add_mouse_buttonchange(int set, int value)
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int add_mouse_buttonchange(int set, int value)
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{
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{
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mouse_buttons = (mouse_buttons & ~set) ^ value;
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mouse_buttons = (mouse_buttons & ~set) ^ value;
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mouse_ready = 1;
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mouse_ready = 1;
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wake_up(&mouse_wait);
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wake_up(&mouse_wait);
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return mouse_buttons;
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return mouse_buttons;
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}
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}
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static int fasync_mouse(struct inode *inode, struct file *filp, int on)
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static int fasync_mouse(struct inode *inode, struct file *filp, int on)
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{
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{
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int retval;
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int retval;
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retval = fasync_helper(inode, filp, on, &fasyncptr);
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retval = fasync_helper(inode, filp, on, &fasyncptr);
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if (retval < 0)
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if (retval < 0)
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return retval;
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return retval;
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return 0;
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return 0;
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}
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}
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static void close_mouse(struct inode *inode, struct file *file)
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static void close_mouse(struct inode *inode, struct file *file)
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{
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{
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fasync_mouse (inode, file, 0);
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fasync_mouse (inode, file, 0);
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if (--mouse_active)
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if (--mouse_active)
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return;
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return;
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mouse_ready = 0;
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mouse_ready = 0;
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MOD_DEC_USE_COUNT;
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MOD_DEC_USE_COUNT;
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}
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}
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static int open_mouse(struct inode *inode,struct file *file)
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static int open_mouse(struct inode *inode,struct file *file)
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{
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{
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unsigned long flags;
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unsigned long flags;
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if (!mouse_present)
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if (!mouse_present)
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return -EINVAL;
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return -EINVAL;
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if (mouse_active++)
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if (mouse_active++)
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return 0;
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return 0;
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MOD_INC_USE_COUNT;
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MOD_INC_USE_COUNT;
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save_flags_cli (flags);
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save_flags_cli (flags);
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mouse_active = 1;
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mouse_active = 1;
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mouse_ready = 0;
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mouse_ready = 0;
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mouse_dxpos = 0;
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mouse_dxpos = 0;
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mouse_dypos = 0;
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mouse_dypos = 0;
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mouse_buttons = 7;
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mouse_buttons = 7;
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restore_flags (flags);
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restore_flags (flags);
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return 0;
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return 0;
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}
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}
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static int write_mouse(struct inode *inode,struct file *file,const char *buffer,int count)
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static int write_mouse(struct inode *inode,struct file *file,const char *buffer,int count)
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{
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{
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return -EINVAL;
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return -EINVAL;
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}
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}
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static int read_mouse(struct inode *inode,struct file *file,char *buffer,int count)
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static int read_mouse(struct inode *inode,struct file *file,char *buffer,int count)
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{
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{
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unsigned long flags;
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unsigned long flags;
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int dxpos, dypos, i, buttons;
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int dxpos, dypos, i, buttons;
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if (count < 3)
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if (count < 3)
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return -EINVAL;
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return -EINVAL;
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if ((i = verify_area(VERIFY_WRITE, buffer, count)))
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if ((i = verify_area(VERIFY_WRITE, buffer, count)))
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return i;
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return i;
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if (!mouse_ready)
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if (!mouse_ready)
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return -EAGAIN;
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return -EAGAIN;
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save_flags_cli (flags);
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save_flags_cli (flags);
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dxpos = mouse_dxpos;
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dxpos = mouse_dxpos;
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dypos = mouse_dypos;
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dypos = mouse_dypos;
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buttons = mouse_buttons;
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buttons = mouse_buttons;
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if (dxpos < -127)
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if (dxpos < -127)
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dxpos =- 127;
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dxpos =- 127;
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if (dxpos > 127)
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if (dxpos > 127)
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dxpos = 127;
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dxpos = 127;
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if (dypos < -127)
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if (dypos < -127)
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dypos =- 127;
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dypos =- 127;
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if (dypos > 127)
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if (dypos > 127)
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dypos = 127;
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dypos = 127;
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mouse_dxpos -= dxpos;
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mouse_dxpos -= dxpos;
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mouse_dypos -= dypos;
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mouse_dypos -= dypos;
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mouse_ready = 0;
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mouse_ready = 0;
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restore_flags (flags);
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restore_flags (flags);
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put_user ((char) buttons | 128, buffer);
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put_user ((char) buttons | 128, buffer);
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put_user ((char) dxpos, buffer + 1);
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put_user ((char) dxpos, buffer + 1);
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put_user ((char) dypos, buffer + 2);
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put_user ((char) dypos, buffer + 2);
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for(i = 3; i < count; i++)
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for(i = 3; i < count; i++)
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put_user (0, buffer + i);
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put_user (0, buffer + i);
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return i;
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return i;
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}
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}
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static int select_mouse(struct inode *inode,struct file *file,int sel_type,select_table *wait)
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static int select_mouse(struct inode *inode,struct file *file,int sel_type,select_table *wait)
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{
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{
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if (sel_type == SEL_IN) {
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if (sel_type == SEL_IN) {
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if (mouse_ready)
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if (mouse_ready)
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return 1;
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return 1;
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select_wait (&mouse_wait,wait);
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select_wait (&mouse_wait,wait);
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}
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}
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return 0;
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return 0;
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}
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}
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struct file_operations kbd_mouse_fops=
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struct file_operations kbd_mouse_fops=
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{
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{
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NULL, /* mouse_seek */
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NULL, /* mouse_seek */
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read_mouse,
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read_mouse,
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write_mouse,
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write_mouse,
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NULL, /* mouse_readdir */
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NULL, /* mouse_readdir */
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select_mouse,
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select_mouse,
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NULL, /* mouse_ioctl */
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NULL, /* mouse_ioctl */
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NULL, /* mouse_mmap */
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NULL, /* mouse_mmap */
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open_mouse,
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open_mouse,
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close_mouse,
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close_mouse,
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NULL,
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NULL,
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fasync_mouse,
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fasync_mouse,
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};
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};
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static struct miscdevice mouse_misc = {
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static struct miscdevice mouse_misc = {
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6, "mouse", &kbd_mouse_fops, NULL, NULL
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6, "mouse", &kbd_mouse_fops, NULL, NULL
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};
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};
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int misc_mouse_init(void)
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int misc_mouse_init(void)
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{
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{
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unsigned long flags;
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unsigned long flags;
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save_flags_cli (flags);
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save_flags_cli (flags);
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mouse_buttons = 0;
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mouse_buttons = 0;
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mouse_dxpos = 0;
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mouse_dxpos = 0;
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mouse_dypos = 0;
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mouse_dypos = 0;
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mouse_present = 1;
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mouse_present = 1;
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mouse_ready = 0;
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mouse_ready = 0;
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mouse_active = 0;
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mouse_active = 0;
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mouse_wait = NULL;
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mouse_wait = NULL;
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restore_flags (flags);
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restore_flags (flags);
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misc_register (&mouse_misc);
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misc_register (&mouse_misc);
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#ifdef CONFIG_RPCMOUSE
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#ifdef CONFIG_RPCMOUSE
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mouse_rpc_init();
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mouse_rpc_init();
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#endif
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#endif
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return 0;
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return 0;
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}
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}
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#ifdef MODULE
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#ifdef MODULE
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int init_module(void)
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int init_module(void)
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{
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{
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return misc_mouse_init();
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return misc_mouse_init();
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}
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}
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void cleanup_module(void)
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void cleanup_module(void)
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{
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{
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misc_deregister (&mouse_misc);
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misc_deregister (&mouse_misc);
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}
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}
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#endif
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#endif
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