/*
* $Id: logibm.c,v 1.11 2001/09/25 10:12:07 vojtech Exp $
*
* Copyright (c) 1999-2001 Vojtech Pavlik
*
* Based on the work of:
* James Banks Matthew Dillon
* David Giller Nathan Laredo
* Linus Torvalds Johan Myreen
* Cliff Matthews Philip Blundell
* Russell King
*/
/*
* Logitech Bus Mouse Driver for Linux
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Should you need to contact me, the author, you can do so either by
* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/irq.h>
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Logitech busmouse driver");
MODULE_LICENSE("GPL");
#define LOGIBM_BASE 0x23c
#define LOGIBM_EXTENT 4
#define LOGIBM_DATA_PORT LOGIBM_BASE + 0
#define LOGIBM_SIGNATURE_PORT LOGIBM_BASE + 1
#define LOGIBM_CONTROL_PORT LOGIBM_BASE + 2
#define LOGIBM_CONFIG_PORT LOGIBM_BASE + 3
#define LOGIBM_ENABLE_IRQ 0x00
#define LOGIBM_DISABLE_IRQ 0x10
#define LOGIBM_READ_X_LOW 0x80
#define LOGIBM_READ_X_HIGH 0xa0
#define LOGIBM_READ_Y_LOW 0xc0
#define LOGIBM_READ_Y_HIGH 0xe0
#define LOGIBM_DEFAULT_MODE 0x90
#define LOGIBM_CONFIG_BYTE 0x91
#define LOGIBM_SIGNATURE_BYTE 0xa5
#define LOGIBM_IRQ 5
static int logibm_irq = LOGIBM_IRQ;
module_param_named(irq, logibm_irq, uint, 0);
MODULE_PARM_DESC(irq, "IRQ number (5=default)");
__obsolete_setup("logibm_irq=");
static int logibm_used = 0;
static irqreturn_t logibm_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static int logibm_open(struct input_dev *dev)
{
if (logibm_used++)
return 0;
if (request_irq(logibm_irq, logibm_interrupt, 0, "logibm", NULL)) {
logibm_used--;
printk(KERN_ERR "logibm.c: Can't allocate irq %d\n", logibm_irq);
return -EBUSY;
}
outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT);
return 0;
}
static void logibm_close(struct input_dev *dev)
{
if (--logibm_used)
return;
outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT);
free_irq(logibm_irq, NULL);
}
static struct input_dev logibm_dev = {
.evbit = { BIT(EV_KEY) | BIT(EV_REL) },
.keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT) },
.relbit = { BIT(REL_X) | BIT(REL_Y) },
.open = logibm_open,
.close = logibm_close,
.name = "Logitech bus mouse",
.phys = "isa023c/input0",
.id = {
.bustype = BUS_ISA,
.vendor = 0x0003,
.product = 0x0001,
.version = 0x0100,
},
};
static irqreturn_t logibm_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
char dx, dy;
unsigned char buttons;
outb(LOGIBM_READ_X_LOW, LOGIBM_CONTROL_PORT);
dx = (inb(LOGIBM_DATA_PORT) & 0xf);
outb(LOGIBM_READ_X_HIGH, LOGIBM_CONTROL_PORT);
dx |= (inb(LOGIBM_DATA_PORT) & 0xf) << 4;
outb(LOGIBM_READ_Y_LOW, LOGIBM_CONTROL_PORT);
dy = (inb(LOGIBM_DATA_PORT) & 0xf);
outb(LOGIBM_READ_Y_HIGH, LOGIBM_CONTROL_PORT);
buttons = inb(LOGIBM_DATA_PORT);
dy |= (buttons & 0xf) << 4;
buttons = ~buttons >> 5;
input_regs(&logibm_dev, regs);
input_report_rel(&logibm_dev, REL_X, dx);
input_report_rel(&logibm_dev, REL_Y, dy);
input_report_key(&logibm_dev, BTN_RIGHT, buttons & 1);
input_report_key(&logibm_dev, BTN_MIDDLE, buttons & 2);
input_report_key(&logibm_dev, BTN_LEFT, buttons & 4);
input_sync(&logibm_dev);
outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT);
return IRQ_HANDLED;
}
static int __init logibm_init(void)
{
if (!request_region(LOGIBM_BASE, LOGIBM_EXTENT, "logibm")) {
printk(KERN_ERR "logibm.c: Can't allocate ports at %#x\n", LOGIBM_BASE);
return -EBUSY;
}
outb(LOGIBM_CONFIG_BYTE, LOGIBM_CONFIG_PORT);
outb(LOGIBM_SIGNATURE_BYTE, LOGIBM_SIGNATURE_PORT);
udelay(100);
if (inb(LOGIBM_SIGNATURE_PORT) != LOGIBM_SIGNATURE_BYTE) {
release_region(LOGIBM_BASE, LOGIBM_EXTENT);
printk(KERN_ERR "logibm.c: Didn't find Logitech busmouse at %#x\n", LOGIBM_BASE);
return -ENODEV;
}
outb(LOGIBM_DEFAULT_MODE, LOGIBM_CONFIG_PORT);
outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT);
input_register_device(&logibm_dev);
printk(KERN_INFO "input: Logitech bus mouse at %#x irq %d\n", LOGIBM_BASE, logibm_irq);
return 0;
}
static void __exit logibm_exit(void)
{
input_unregister_device(&logibm_dev);
release_region(LOGIBM_BASE, LOGIBM_EXTENT);
}
module_init(logibm_init);
module_exit(logibm_exit);
