cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/mouse/logibm.c

/*
 *  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/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)");


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; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik17197.71%375.00%
Andrew Morton42.29%125.00%
Total175100.00%4100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Torokhov50100.00%1100.00%
Total50100.00%1100.00%


static void logibm_close(struct input_dev *dev) { outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT); free_irq(logibm_irq, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Torokhov25100.00%1100.00%
Total25100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Torokhov17061.82%233.33%
Vojtech Pavlik9634.91%233.33%
Jiri Slaby82.91%116.67%
Helge Deller10.36%116.67%
Total275100.00%6100.00%


static void __exit logibm_exit(void) { input_unregister_device(logibm_dev); release_region(LOGIBM_BASE, LOGIBM_EXTENT); }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik21100.00%1100.00%
Total21100.00%1100.00%

module_init(logibm_init); module_exit(logibm_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik40358.24%325.00%
Dmitry Torokhov24735.69%325.00%
Andrew Morton223.18%216.67%
William Lee Irwin III101.45%18.33%
Jiri Slaby81.16%18.33%
Adrian Bunk10.14%18.33%
Helge Deller10.14%18.33%
Total692100.00%12100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.