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 32 #include <linux/module.h> 33 #include <linux/delay.h> 34 #include <linux/ioport.h> 35 #include <linux/init.h> 36 #include <linux/input.h> 37 #include <linux/interrupt.h> 38 39 #include <asm/io.h> 40 #include <asm/irq.h> 41 42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 43 MODULE_DESCRIPTION("Logitech busmouse driver"); 44 MODULE_LICENSE("GPL"); 45 46 #define LOGIBM_BASE 0x23c 47 #define LOGIBM_EXTENT 4 48 49 #define LOGIBM_DATA_PORT LOGIBM_BASE + 0 50 #define LOGIBM_SIGNATURE_PORT LOGIBM_BASE + 1 51 #define LOGIBM_CONTROL_PORT LOGIBM_BASE + 2 52 #define LOGIBM_CONFIG_PORT LOGIBM_BASE + 3 53 54 #define LOGIBM_ENABLE_IRQ 0x00 55 #define LOGIBM_DISABLE_IRQ 0x10 56 #define LOGIBM_READ_X_LOW 0x80 57 #define LOGIBM_READ_X_HIGH 0xa0 58 #define LOGIBM_READ_Y_LOW 0xc0 59 #define LOGIBM_READ_Y_HIGH 0xe0 60 61 #define LOGIBM_DEFAULT_MODE 0x90 62 #define LOGIBM_CONFIG_BYTE 0x91 63 #define LOGIBM_SIGNATURE_BYTE 0xa5 64 65 #define LOGIBM_IRQ 5 66 67 static int logibm_irq = LOGIBM_IRQ; 68 module_param_hw_named(irq, logibm_irq, uint, irq, 0); 69 MODULE_PARM_DESC(irq, "IRQ number (5=default)"); 70 71 static struct input_dev *logibm_dev; 72 73 static irqreturn_t logibm_interrupt(int irq, void *dev_id) 74 { 75 char dx, dy; 76 unsigned char buttons; 77 78 outb(LOGIBM_READ_X_LOW, LOGIBM_CONTROL_PORT); 79 dx = (inb(LOGIBM_DATA_PORT) & 0xf); 80 outb(LOGIBM_READ_X_HIGH, LOGIBM_CONTROL_PORT); 81 dx |= (inb(LOGIBM_DATA_PORT) & 0xf) << 4; 82 outb(LOGIBM_READ_Y_LOW, LOGIBM_CONTROL_PORT); 83 dy = (inb(LOGIBM_DATA_PORT) & 0xf); 84 outb(LOGIBM_READ_Y_HIGH, LOGIBM_CONTROL_PORT); 85 buttons = inb(LOGIBM_DATA_PORT); 86 dy |= (buttons & 0xf) << 4; 87 buttons = ~buttons >> 5; 88 89 input_report_rel(logibm_dev, REL_X, dx); 90 input_report_rel(logibm_dev, REL_Y, dy); 91 input_report_key(logibm_dev, BTN_RIGHT, buttons & 1); 92 input_report_key(logibm_dev, BTN_MIDDLE, buttons & 2); 93 input_report_key(logibm_dev, BTN_LEFT, buttons & 4); 94 input_sync(logibm_dev); 95 96 outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT); 97 return IRQ_HANDLED; 98 } 99 100 static int logibm_open(struct input_dev *dev) 101 { 102 if (request_irq(logibm_irq, logibm_interrupt, 0, "logibm", NULL)) { 103 printk(KERN_ERR "logibm.c: Can't allocate irq %d\n", logibm_irq); 104 return -EBUSY; 105 } 106 outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT); 107 return 0; 108 } 109 110 static void logibm_close(struct input_dev *dev) 111 { 112 outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT); 113 free_irq(logibm_irq, NULL); 114 } 115 116 static int __init logibm_init(void) 117 { 118 int err; 119 120 if (!request_region(LOGIBM_BASE, LOGIBM_EXTENT, "logibm")) { 121 printk(KERN_ERR "logibm.c: Can't allocate ports at %#x\n", LOGIBM_BASE); 122 return -EBUSY; 123 } 124 125 outb(LOGIBM_CONFIG_BYTE, LOGIBM_CONFIG_PORT); 126 outb(LOGIBM_SIGNATURE_BYTE, LOGIBM_SIGNATURE_PORT); 127 udelay(100); 128 129 if (inb(LOGIBM_SIGNATURE_PORT) != LOGIBM_SIGNATURE_BYTE) { 130 printk(KERN_INFO "logibm.c: Didn't find Logitech busmouse at %#x\n", LOGIBM_BASE); 131 err = -ENODEV; 132 goto err_release_region; 133 } 134 135 outb(LOGIBM_DEFAULT_MODE, LOGIBM_CONFIG_PORT); 136 outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT); 137 138 logibm_dev = input_allocate_device(); 139 if (!logibm_dev) { 140 printk(KERN_ERR "logibm.c: Not enough memory for input device\n"); 141 err = -ENOMEM; 142 goto err_release_region; 143 } 144 145 logibm_dev->name = "Logitech bus mouse"; 146 logibm_dev->phys = "isa023c/input0"; 147 logibm_dev->id.bustype = BUS_ISA; 148 logibm_dev->id.vendor = 0x0003; 149 logibm_dev->id.product = 0x0001; 150 logibm_dev->id.version = 0x0100; 151 152 logibm_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 153 logibm_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | 154 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); 155 logibm_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 156 157 logibm_dev->open = logibm_open; 158 logibm_dev->close = logibm_close; 159 160 err = input_register_device(logibm_dev); 161 if (err) 162 goto err_free_dev; 163 164 return 0; 165 166 err_free_dev: 167 input_free_device(logibm_dev); 168 err_release_region: 169 release_region(LOGIBM_BASE, LOGIBM_EXTENT); 170 171 return err; 172 } 173 174 static void __exit logibm_exit(void) 175 { 176 input_unregister_device(logibm_dev); 177 release_region(LOGIBM_BASE, LOGIBM_EXTENT); 178 } 179 180 module_init(logibm_init); 181 module_exit(logibm_exit); 182