1/* 2 * Copyright (c) 1999-2001 Vojtech Pavlik 3 * 4 * Based on the work of: 5 * James Banks Matthew Dillon 6 * David Giller Nathan Laredo 7 * Linus Torvalds Johan Myreen 8 * Cliff Matthews Philip Blundell 9 * Russell King 10 */ 11 12/* 13 * Logitech Bus Mouse Driver for Linux 14 */ 15 16/* 17 * This program is free software; you can redistribute it and/or modify 18 * it under the terms of the GNU General Public License as published by 19 * the Free Software Foundation; either version 2 of the License, or 20 * (at your option) any later version. 21 * 22 * This program is distributed in the hope that it will be useful, 23 * but WITHOUT ANY WARRANTY; without even the implied warranty of 24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 * GNU General Public License for more details. 26 * 27 * You should have received a copy of the GNU General Public License 28 * along with this program; if not, write to the Free Software 29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 30 * 31 * Should you need to contact me, the author, you can do so either by 32 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 33 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 34 */ 35 36#include <linux/module.h> 37#include <linux/delay.h> 38#include <linux/ioport.h> 39#include <linux/init.h> 40#include <linux/input.h> 41#include <linux/interrupt.h> 42 43#include <asm/io.h> 44#include <asm/irq.h> 45 46MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 47MODULE_DESCRIPTION("Logitech busmouse driver"); 48MODULE_LICENSE("GPL"); 49 50#define LOGIBM_BASE 0x23c 51#define LOGIBM_EXTENT 4 52 53#define LOGIBM_DATA_PORT LOGIBM_BASE + 0 54#define LOGIBM_SIGNATURE_PORT LOGIBM_BASE + 1 55#define LOGIBM_CONTROL_PORT LOGIBM_BASE + 2 56#define LOGIBM_CONFIG_PORT LOGIBM_BASE + 3 57 58#define LOGIBM_ENABLE_IRQ 0x00 59#define LOGIBM_DISABLE_IRQ 0x10 60#define LOGIBM_READ_X_LOW 0x80 61#define LOGIBM_READ_X_HIGH 0xa0 62#define LOGIBM_READ_Y_LOW 0xc0 63#define LOGIBM_READ_Y_HIGH 0xe0 64 65#define LOGIBM_DEFAULT_MODE 0x90 66#define LOGIBM_CONFIG_BYTE 0x91 67#define LOGIBM_SIGNATURE_BYTE 0xa5 68 69#define LOGIBM_IRQ 5 70 71static int logibm_irq = LOGIBM_IRQ; 72module_param_named(irq, logibm_irq, uint, 0); 73MODULE_PARM_DESC(irq, "IRQ number (5=default)"); 74 75static struct input_dev *logibm_dev; 76 77static irqreturn_t logibm_interrupt(int irq, void *dev_id) 78{ 79 char dx, dy; 80 unsigned char buttons; 81 82 outb(LOGIBM_READ_X_LOW, LOGIBM_CONTROL_PORT); 83 dx = (inb(LOGIBM_DATA_PORT) & 0xf); 84 outb(LOGIBM_READ_X_HIGH, LOGIBM_CONTROL_PORT); 85 dx |= (inb(LOGIBM_DATA_PORT) & 0xf) << 4; 86 outb(LOGIBM_READ_Y_LOW, LOGIBM_CONTROL_PORT); 87 dy = (inb(LOGIBM_DATA_PORT) & 0xf); 88 outb(LOGIBM_READ_Y_HIGH, LOGIBM_CONTROL_PORT); 89 buttons = inb(LOGIBM_DATA_PORT); 90 dy |= (buttons & 0xf) << 4; 91 buttons = ~buttons >> 5; 92 93 input_report_rel(logibm_dev, REL_X, dx); 94 input_report_rel(logibm_dev, REL_Y, dy); 95 input_report_key(logibm_dev, BTN_RIGHT, buttons & 1); 96 input_report_key(logibm_dev, BTN_MIDDLE, buttons & 2); 97 input_report_key(logibm_dev, BTN_LEFT, buttons & 4); 98 input_sync(logibm_dev); 99 100 outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT); 101 return IRQ_HANDLED; 102} 103 104static int logibm_open(struct input_dev *dev) 105{ 106 if (request_irq(logibm_irq, logibm_interrupt, 0, "logibm", NULL)) { 107 printk(KERN_ERR "logibm.c: Can't allocate irq %d\n", logibm_irq); 108 return -EBUSY; 109 } 110 outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT); 111 return 0; 112} 113 114static void logibm_close(struct input_dev *dev) 115{ 116 outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT); 117 free_irq(logibm_irq, NULL); 118} 119 120static int __init logibm_init(void) 121{ 122 int err; 123 124 if (!request_region(LOGIBM_BASE, LOGIBM_EXTENT, "logibm")) { 125 printk(KERN_ERR "logibm.c: Can't allocate ports at %#x\n", LOGIBM_BASE); 126 return -EBUSY; 127 } 128 129 outb(LOGIBM_CONFIG_BYTE, LOGIBM_CONFIG_PORT); 130 outb(LOGIBM_SIGNATURE_BYTE, LOGIBM_SIGNATURE_PORT); 131 udelay(100); 132 133 if (inb(LOGIBM_SIGNATURE_PORT) != LOGIBM_SIGNATURE_BYTE) { 134 printk(KERN_INFO "logibm.c: Didn't find Logitech busmouse at %#x\n", LOGIBM_BASE); 135 err = -ENODEV; 136 goto err_release_region; 137 } 138 139 outb(LOGIBM_DEFAULT_MODE, LOGIBM_CONFIG_PORT); 140 outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT); 141 142 logibm_dev = input_allocate_device(); 143 if (!logibm_dev) { 144 printk(KERN_ERR "logibm.c: Not enough memory for input device\n"); 145 err = -ENOMEM; 146 goto err_release_region; 147 } 148 149 logibm_dev->name = "Logitech bus mouse"; 150 logibm_dev->phys = "isa023c/input0"; 151 logibm_dev->id.bustype = BUS_ISA; 152 logibm_dev->id.vendor = 0x0003; 153 logibm_dev->id.product = 0x0001; 154 logibm_dev->id.version = 0x0100; 155 156 logibm_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 157 logibm_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | 158 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); 159 logibm_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 160 161 logibm_dev->open = logibm_open; 162 logibm_dev->close = logibm_close; 163 164 err = input_register_device(logibm_dev); 165 if (err) 166 goto err_free_dev; 167 168 return 0; 169 170 err_free_dev: 171 input_free_device(logibm_dev); 172 err_release_region: 173 release_region(LOGIBM_BASE, LOGIBM_EXTENT); 174 175 return err; 176} 177 178static void __exit logibm_exit(void) 179{ 180 input_unregister_device(logibm_dev); 181 release_region(LOGIBM_BASE, LOGIBM_EXTENT); 182} 183 184module_init(logibm_init); 185module_exit(logibm_exit); 186