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/*
* Microsoft busmouse driver based on Logitech driver (see busmouse.c)
*
* Microsoft BusMouse support by Teemu Rantanen (tvr@cs.hut.fi) (02AUG92)
*
* Microsoft Bus Mouse support modified by Derrick Cole (cole@concert.net)
* 8/28/92
*
* Microsoft Bus Mouse support folded into 0.97pl4 code
* by Peter Cervasio (pete%q106fm.uucp@wupost.wustl.edu) (08SEP92)
* Changes: Logitech and Microsoft support in the same kernel.
* Defined new constants in busmouse.h for MS mice.
* Added int mse_busmouse_type to distinguish busmouse types
* Added a couple of new functions to handle differences in using
* MS vs. Logitech (where the int variable wasn't appropriate).
*
* Modified by Peter Cervasio (address above) (26SEP92)
* Changes: Included code to (properly?) detect when a Microsoft mouse is
* really attached to the machine. Don't know what this does to
* Logitech bus mice, but all it does is read ports.
*
* Modified by Christoph Niemann (niemann@rubdv15.etdv.ruhr-uni-bochum.de)
* Changes: Better interrupt-handler (like in busmouse.c).
* Some changes to reduce code-size.
* Changed detection code to use inb_p() instead of doing empty
* loops to delay i/o.
*
* 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 0.3b
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/logibusmouse.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 <asm/io.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/irq.h>
#include "busmouse.h"
static int msedev;
static int mouse_irq = MOUSE_IRQ;
MODULE_PARM(mouse_irq, "i");
#ifndef MODULE
static int __init msmouse_setup(char *str)
{
int ints[4];
str = get_options(str, ARRAY_SIZE(ints), ints);
if (ints[0] > 0)
mouse_irq=ints[1];
return 1;
}
__setup("msmouse=",msmouse_setup);
#endif /* !MODULE */
static void ms_mouse_interrupt(int irq, void *dev_id, struct pt_regs * regs)
{
char dx, dy;
unsigned char buttons;
outb(MS_MSE_COMMAND_MODE, MS_MSE_CONTROL_PORT);
outb((inb(MS_MSE_DATA_PORT) | 0x20), MS_MSE_DATA_PORT);
outb(MS_MSE_READ_X, MS_MSE_CONTROL_PORT);
dx = inb(MS_MSE_DATA_PORT);
outb(MS_MSE_READ_Y, MS_MSE_CONTROL_PORT);
dy = inb(MS_MSE_DATA_PORT);
outb(MS_MSE_READ_BUTTONS, MS_MSE_CONTROL_PORT);
buttons = ~(inb(MS_MSE_DATA_PORT)) & 0x07;
outb(MS_MSE_COMMAND_MODE, MS_MSE_CONTROL_PORT);
outb((inb(MS_MSE_DATA_PORT) & 0xdf), MS_MSE_DATA_PORT);
/* why did the original have:
* if (dx != 0 || dy != 0 || buttons != mouse.buttons ||
* ((~buttons) & 0x07))
* ^^^^^^^^^^^^^^^^^^^ this?
*/
busmouse_add_movementbuttons(msedev, dx, -dy, buttons);
}
static int release_mouse(struct inode * inode, struct file * file)
{
MS_MSE_INT_OFF();
free_irq(mouse_irq, NULL);
MOD_DEC_USE_COUNT;
return 0;
}
static int open_mouse(struct inode * inode, struct file * file)
{
if (request_irq(mouse_irq, ms_mouse_interrupt, 0, "MS Busmouse", NULL))
return -EBUSY;
outb(MS_MSE_START, MS_MSE_CONTROL_PORT);
MOD_INC_USE_COUNT;
MS_MSE_INT_ON();
return 0;
}
static struct busmouse msbusmouse = {
MICROSOFT_BUSMOUSE, "msbusmouse", open_mouse, release_mouse, 0
};
static int __init ms_bus_mouse_init(void)
{
int present = 0;
int mse_byte, i;
if (check_region(MS_MSE_CONTROL_PORT, 0x04))
return -ENODEV;
if (inb_p(MS_MSE_SIGNATURE_PORT) == 0xde) {
mse_byte = inb_p(MS_MSE_SIGNATURE_PORT);
for (i = 0; i < 4; i++) {
if (inb_p(MS_MSE_SIGNATURE_PORT) == 0xde) {
if (inb_p(MS_MSE_SIGNATURE_PORT) == mse_byte)
present = 1;
else
present = 0;
} else
present = 0;
}
}
if (present == 0)
return -EIO;
MS_MSE_INT_OFF();
request_region(MS_MSE_CONTROL_PORT, 0x04, "MS Busmouse");
msedev = register_busmouse(&msbusmouse);
if (msedev < 0)
printk(KERN_WARNING "Unable to register msbusmouse driver.\n");
else
printk(KERN_INFO "Microsoft BusMouse detected and installed.\n");
return msedev < 0 ? msedev : 0;
}
static void __exit ms_bus_mouse_exit(void)
{
unregister_busmouse(msedev);
release_region(MS_MSE_CONTROL_PORT, 0x04);
}
module_init(ms_bus_mouse_init)
module_exit(ms_bus_mouse_exit)
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