mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
2d09ac951b
Commit 1a59d1b8e0 ("treewide: Replace GPLv2 boilerplate/reference with
SPDX - rule 156") has left some empty comment blocks.
Remove them to save a few lines of code.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/26a2b905b259bfffaf2de5b26f2007b8606970ed.1664478665.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
167 lines
4.2 KiB
C
167 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* 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
|
|
*/
|
|
|
|
#include <linux/module.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_hw_named(irq, logibm_irq, uint, irq, 0);
|
|
MODULE_PARM_DESC(irq, "IRQ number (5=default)");
|
|
|
|
static struct input_dev *logibm_dev;
|
|
|
|
static irqreturn_t logibm_interrupt(int irq, void *dev_id)
|
|
{
|
|
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_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 logibm_open(struct input_dev *dev)
|
|
{
|
|
if (request_irq(logibm_irq, logibm_interrupt, 0, "logibm", NULL)) {
|
|
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)
|
|
{
|
|
outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT);
|
|
free_irq(logibm_irq, NULL);
|
|
}
|
|
|
|
static int __init logibm_init(void)
|
|
{
|
|
int err;
|
|
|
|
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) {
|
|
printk(KERN_INFO "logibm.c: Didn't find Logitech busmouse at %#x\n", LOGIBM_BASE);
|
|
err = -ENODEV;
|
|
goto err_release_region;
|
|
}
|
|
|
|
outb(LOGIBM_DEFAULT_MODE, LOGIBM_CONFIG_PORT);
|
|
outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT);
|
|
|
|
logibm_dev = input_allocate_device();
|
|
if (!logibm_dev) {
|
|
printk(KERN_ERR "logibm.c: Not enough memory for input device\n");
|
|
err = -ENOMEM;
|
|
goto err_release_region;
|
|
}
|
|
|
|
logibm_dev->name = "Logitech bus mouse";
|
|
logibm_dev->phys = "isa023c/input0";
|
|
logibm_dev->id.bustype = BUS_ISA;
|
|
logibm_dev->id.vendor = 0x0003;
|
|
logibm_dev->id.product = 0x0001;
|
|
logibm_dev->id.version = 0x0100;
|
|
|
|
logibm_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
|
|
logibm_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
|
|
BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
|
|
logibm_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
|
|
|
|
logibm_dev->open = logibm_open;
|
|
logibm_dev->close = logibm_close;
|
|
|
|
err = input_register_device(logibm_dev);
|
|
if (err)
|
|
goto err_free_dev;
|
|
|
|
return 0;
|
|
|
|
err_free_dev:
|
|
input_free_device(logibm_dev);
|
|
err_release_region:
|
|
release_region(LOGIBM_BASE, LOGIBM_EXTENT);
|
|
|
|
return err;
|
|
}
|
|
|
|
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);
|