msbusmouse.c
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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);
- 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);
- MS_MSE_INT_ON();
- return 0;
- }
- static struct busmouse msbusmouse = {
- MICROSOFT_BUSMOUSE, "msbusmouse", THIS_MODULE, 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;
- if (!request_region(MS_MSE_CONTROL_PORT, 0x04, "MS Busmouse"))
- return -EIO;
-
- MS_MSE_INT_OFF();
- msedev = register_busmouse(&msbusmouse);
- if (msedev < 0) {
- printk(KERN_WARNING "Unable to register msbusmouse driver.n");
- release_region(MS_MSE_CONTROL_PORT, 0x04);
- }
- 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)
- MODULE_LICENSE("GPL");
- EXPORT_NO_SYMBOLS;