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/*
* ATI XL Bus Mouse Driver for Linux
* by Bob Harris (rth@sparta.com)
*
* Uses VFS interface for linux 0.98 (01OCT92)
*
* Modified by Chris Colohan (colohan@eecg.toronto.edu)
* Modularised 8-Sep-95 Philip Blundell <pjb27@cam.ac.uk>
*
* Converted to use new generic busmouse code. 5 Apr 1998
* Russell King <rmk@arm.uk.linux.org>
*
* version 0.3a
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/miscdevice.h>
#include <linux/random.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/irq.h>
#include "busmouse.h"
#define ATIXL_MOUSE_IRQ 5 /* H/W interrupt # set up on ATIXL board */
#define ATIXL_BUSMOUSE 3 /* Minor device # (mknod c 10 3 /dev/bm) */
/* ATI XL Inport Busmouse Definitions */
#define ATIXL_MSE_DATA_PORT 0x23d
#define ATIXL_MSE_SIGNATURE_PORT 0x23e
#define ATIXL_MSE_CONTROL_PORT 0x23c
#define ATIXL_MSE_READ_BUTTONS 0x00
#define ATIXL_MSE_READ_X 0x01
#define ATIXL_MSE_READ_Y 0x02
/* Some nice ATI XL macros */
/* Select IR7, HOLD UPDATES (INT ENABLED), save X,Y */
#define ATIXL_MSE_DISABLE_UPDATE() { outb( 0x07, ATIXL_MSE_CONTROL_PORT ); \
outb( (0x20 | inb( ATIXL_MSE_DATA_PORT )), ATIXL_MSE_DATA_PORT ); }
/* Select IR7, Enable updates (INT ENABLED) */
#define ATIXL_MSE_ENABLE_UPDATE() { outb( 0x07, ATIXL_MSE_CONTROL_PORT ); \
outb( (0xdf & inb( ATIXL_MSE_DATA_PORT )), ATIXL_MSE_DATA_PORT ); }
/* Select IR7 - Mode Register, NO INTERRUPTS */
#define ATIXL_MSE_INT_OFF() { outb( 0x07, ATIXL_MSE_CONTROL_PORT ); \
outb( (0xe7 & inb( ATIXL_MSE_DATA_PORT )), ATIXL_MSE_DATA_PORT ); }
/* Select IR7 - Mode Register, DATA INTERRUPTS ENABLED */
#define ATIXL_MSE_INT_ON() { outb( 0x07, ATIXL_MSE_CONTROL_PORT ); \
outb( (0x08 | inb( ATIXL_MSE_DATA_PORT )), ATIXL_MSE_DATA_PORT ); }
/* Same general mouse structure */
static int msedev;
static void mouse_interrupt(int irq, void *dev_id, struct pt_regs * regs)
{
char dx, dy, buttons;
ATIXL_MSE_DISABLE_UPDATE(); /* Note that interrupts are still enabled */
outb(ATIXL_MSE_READ_X, ATIXL_MSE_CONTROL_PORT); /* Select IR1 - X movement */
dx = inb( ATIXL_MSE_DATA_PORT);
outb(ATIXL_MSE_READ_Y, ATIXL_MSE_CONTROL_PORT); /* Select IR2 - Y movement */
dy = inb( ATIXL_MSE_DATA_PORT);
outb(ATIXL_MSE_READ_BUTTONS, ATIXL_MSE_CONTROL_PORT); /* Select IR0 - Button Status */
buttons = inb( ATIXL_MSE_DATA_PORT);
busmouse_add_movementbuttons(msedev, dx, -dy, buttons);
ATIXL_MSE_ENABLE_UPDATE();
}
static int release_mouse(struct inode * inode, struct file * file)
{
ATIXL_MSE_INT_OFF(); /* Interrupts are really shut down here */
free_irq(ATIXL_MOUSE_IRQ, NULL);
return 0;
}
static int open_mouse(struct inode * inode, struct file * file)
{
if (request_irq(ATIXL_MOUSE_IRQ, mouse_interrupt, 0, "ATIXL mouse", NULL))
return -EBUSY;
ATIXL_MSE_INT_ON(); /* Interrupts are really enabled here */
return 0;
}
static struct busmouse atixlmouse = {
ATIXL_BUSMOUSE, "atixl", THIS_MODULE, open_mouse, release_mouse, 0
};
static int __init atixl_busmouse_init(void)
{
unsigned char a,b,c;
/*
* We must request the resource and claim it atomically
* nowdays. We can throw it away on error. Otherwise we
* may race another module load of the same I/O
*/
if (!request_region(ATIXL_MSE_DATA_PORT, 3, "atixlmouse"))
return -EIO;
a = inb( ATIXL_MSE_SIGNATURE_PORT ); /* Get signature */
b = inb( ATIXL_MSE_SIGNATURE_PORT );
c = inb( ATIXL_MSE_SIGNATURE_PORT );
if (( a != b ) && ( a == c ))
printk(KERN_INFO "\nATI Inport ");
else
{
release_region(ATIXL_MSE_DATA_PORT,3);
return -EIO;
}
outb(0x80, ATIXL_MSE_CONTROL_PORT); /* Reset the Inport device */
outb(0x07, ATIXL_MSE_CONTROL_PORT); /* Select Internal Register 7 */
outb(0x0a, ATIXL_MSE_DATA_PORT); /* Data Interrupts 8+, 1=30hz, 2=50hz, 3=100hz, 4=200hz rate */
msedev = register_busmouse(&atixlmouse);
if (msedev < 0)
{
printk("Bus mouse initialisation error.\n");
release_region(ATIXL_MSE_DATA_PORT,3); /* Was missing */
}
else
printk("Bus mouse detected and installed.\n");
return msedev < 0 ? msedev : 0;
}
static void __exit atixl_cleanup (void)
{
release_region(ATIXL_MSE_DATA_PORT, 3);
unregister_busmouse(msedev);
}
module_init(atixl_busmouse_init);
module_exit(atixl_cleanup);
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