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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [char/] [atixlmouse.c] - Blame information for rev 1774

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Line No. Rev Author Line
1 1275 phoenix 
/*
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 * ATI XL Bus Mouse Driver for Linux
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 * by Bob Harris (rth@sparta.com)
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 *
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 * Uses VFS interface for linux 0.98 (01OCT92)
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 *
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 * Modified by Chris Colohan (colohan@eecg.toronto.edu)
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 * Modularised 8-Sep-95 Philip Blundell <pjb27@cam.ac.uk>
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 *
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 * Converted to use new generic busmouse code.  5 Apr 1998
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 *   Russell King <rmk@arm.uk.linux.org>
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 *
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 * version 0.3a
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 */
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/signal.h>
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#include <linux/errno.h>
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#include <linux/miscdevice.h>
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#include <linux/random.h>
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#include <linux/poll.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <asm/irq.h>
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#include "busmouse.h"
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#define ATIXL_MOUSE_IRQ         5 /* H/W interrupt # set up on ATIXL board */
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#define ATIXL_BUSMOUSE          3 /* Minor device # (mknod c 10 3 /dev/bm) */
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/* ATI XL Inport Busmouse Definitions */
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#define ATIXL_MSE_DATA_PORT             0x23d
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#define ATIXL_MSE_SIGNATURE_PORT        0x23e
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#define ATIXL_MSE_CONTROL_PORT          0x23c
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#define ATIXL_MSE_READ_BUTTONS          0x00
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#define ATIXL_MSE_READ_X                0x01
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#define ATIXL_MSE_READ_Y                0x02
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/* Some nice ATI XL macros */
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/* Select IR7, HOLD UPDATES (INT ENABLED), save X,Y */
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#define ATIXL_MSE_DISABLE_UPDATE() { outb( 0x07, ATIXL_MSE_CONTROL_PORT ); \
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        outb( (0x20 | inb( ATIXL_MSE_DATA_PORT )), ATIXL_MSE_DATA_PORT ); }
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/* Select IR7, Enable updates (INT ENABLED) */
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#define ATIXL_MSE_ENABLE_UPDATE() { outb( 0x07, ATIXL_MSE_CONTROL_PORT ); \
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         outb( (0xdf & inb( ATIXL_MSE_DATA_PORT )), ATIXL_MSE_DATA_PORT ); }
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/* Select IR7 - Mode Register, NO INTERRUPTS */
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#define ATIXL_MSE_INT_OFF() { outb( 0x07, ATIXL_MSE_CONTROL_PORT ); \
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        outb( (0xe7 & inb( ATIXL_MSE_DATA_PORT )), ATIXL_MSE_DATA_PORT ); }
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/* Select IR7 - Mode Register, DATA INTERRUPTS ENABLED */
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#define ATIXL_MSE_INT_ON() { outb( 0x07, ATIXL_MSE_CONTROL_PORT ); \
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        outb( (0x08 | inb( ATIXL_MSE_DATA_PORT )), ATIXL_MSE_DATA_PORT ); }
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/* Same general mouse structure */
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static int msedev;
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static void mouse_interrupt(int irq, void *dev_id, struct pt_regs * regs)
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{
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        char dx, dy, buttons;
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        ATIXL_MSE_DISABLE_UPDATE(); /* Note that interrupts are still enabled */
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        outb(ATIXL_MSE_READ_X, ATIXL_MSE_CONTROL_PORT); /* Select IR1 - X movement */
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        dx = inb( ATIXL_MSE_DATA_PORT);
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        outb(ATIXL_MSE_READ_Y, ATIXL_MSE_CONTROL_PORT); /* Select IR2 - Y movement */
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        dy = inb( ATIXL_MSE_DATA_PORT);
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        outb(ATIXL_MSE_READ_BUTTONS, ATIXL_MSE_CONTROL_PORT); /* Select IR0 - Button Status */
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        buttons = inb( ATIXL_MSE_DATA_PORT);
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        busmouse_add_movementbuttons(msedev, dx, -dy, buttons);
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        ATIXL_MSE_ENABLE_UPDATE();
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}
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static int release_mouse(struct inode * inode, struct file * file)
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{
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        ATIXL_MSE_INT_OFF(); /* Interrupts are really shut down here */
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        free_irq(ATIXL_MOUSE_IRQ, NULL);
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        return 0;
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}
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static int open_mouse(struct inode * inode, struct file * file)
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{
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        if (request_irq(ATIXL_MOUSE_IRQ, mouse_interrupt, 0, "ATIXL mouse", NULL))
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                return -EBUSY;
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        ATIXL_MSE_INT_ON(); /* Interrupts are really enabled here */
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        return 0;
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}
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static struct busmouse atixlmouse = {
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        ATIXL_BUSMOUSE, "atixl", THIS_MODULE, open_mouse, release_mouse, 0
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};
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static int __init atixl_busmouse_init(void)
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{
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        unsigned char a,b,c;
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        /*
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         *      We must request the resource and claim it atomically
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         *      nowdays. We can throw it away on error. Otherwise we
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         *      may race another module load of the same I/O
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         */
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        if (!request_region(ATIXL_MSE_DATA_PORT, 3, "atixlmouse"))
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                return -EIO;
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        a = inb( ATIXL_MSE_SIGNATURE_PORT );    /* Get signature */
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        b = inb( ATIXL_MSE_SIGNATURE_PORT );
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        c = inb( ATIXL_MSE_SIGNATURE_PORT );
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        if (( a != b ) && ( a == c ))
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                printk(KERN_INFO "\nATI Inport ");
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        else
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        {
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                release_region(ATIXL_MSE_DATA_PORT,3);
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                return -EIO;
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        }
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        outb(0x80, ATIXL_MSE_CONTROL_PORT);     /* Reset the Inport device */
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        outb(0x07, ATIXL_MSE_CONTROL_PORT);     /* Select Internal Register 7 */
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        outb(0x0a, ATIXL_MSE_DATA_PORT);        /* Data Interrupts 8+, 1=30hz, 2=50hz, 3=100hz, 4=200hz rate */
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        msedev = register_busmouse(&atixlmouse);
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        if (msedev < 0)
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        {
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                printk("Bus mouse initialisation error.\n");
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                release_region(ATIXL_MSE_DATA_PORT,3);  /* Was missing */
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        }
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        else
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                printk("Bus mouse detected and installed.\n");
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        return msedev < 0 ? msedev : 0;
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}
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static void __exit atixl_cleanup (void)
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{
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        release_region(ATIXL_MSE_DATA_PORT, 3);
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        unregister_busmouse(msedev);
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}
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module_init(atixl_busmouse_init);
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module_exit(atixl_cleanup);
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MODULE_LICENSE("GPL");

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