1 /* 2 * $Id: logibm.c,v 1.11 2001/09/25 10:12:07 vojtech Exp $ 3 * 4 * Copyright (c) 1999-2001 Vojtech Pavlik 5 * 6 * Based on the work of: 7 * James Banks Matthew Dillon 8 * David Giller Nathan Laredo 9 * Linus Torvalds Johan Myreen 10 * Cliff Matthews Philip Blundell 11 * Russell King 12 */ 13 14 /* 15 * Logitech Bus Mouse Driver for Linux 16 */ 17 18 /* 19 * This program is free software; you can redistribute it and/or modify 20 * it under the terms of the GNU General Public License as published by 21 * the Free Software Foundation; either version 2 of the License, or 22 * (at your option) any later version. 23 * 24 * This program is distributed in the hope that it will be useful, 25 * but WITHOUT ANY WARRANTY; without even the implied warranty of 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 27 * GNU General Public License for more details. 28 * 29 * You should have received a copy of the GNU General Public License 30 * along with this program; if not, write to the Free Software 31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 32 * 33 * Should you need to contact me, the author, you can do so either by 34 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 35 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 36 */ 37 38 #include <linux/module.h> 39 #include <linux/moduleparam.h> 40 #include <linux/delay.h> 41 #include <linux/ioport.h> 42 #include <linux/init.h> 43 #include <linux/input.h> 44 #include <linux/interrupt.h> 45 46 #include <asm/io.h> 47 #include <asm/irq.h> 48 49 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 50 MODULE_DESCRIPTION("Logitech busmouse driver"); 51 MODULE_LICENSE("GPL"); 52 53 #define LOGIBM_BASE 0x23c 54 #define LOGIBM_EXTENT 4 55 56 #define LOGIBM_DATA_PORT LOGIBM_BASE + 0 57 #define LOGIBM_SIGNATURE_PORT LOGIBM_BASE + 1 58 #define LOGIBM_CONTROL_PORT LOGIBM_BASE + 2 59 #define LOGIBM_CONFIG_PORT LOGIBM_BASE + 3 60 61 #define LOGIBM_ENABLE_IRQ 0x00 62 #define LOGIBM_DISABLE_IRQ 0x10 63 #define LOGIBM_READ_X_LOW 0x80 64 #define LOGIBM_READ_X_HIGH 0xa0 65 #define LOGIBM_READ_Y_LOW 0xc0 66 #define LOGIBM_READ_Y_HIGH 0xe0 67 68 #define LOGIBM_DEFAULT_MODE 0x90 69 #define LOGIBM_CONFIG_BYTE 0x91 70 #define LOGIBM_SIGNATURE_BYTE 0xa5 71 72 #define LOGIBM_IRQ 5 73 74 static int logibm_irq = LOGIBM_IRQ; 75 module_param_named(irq, logibm_irq, uint, 0); 76 MODULE_PARM_DESC(irq, "IRQ number (5=default)"); 77 78 static struct input_dev *logibm_dev; 79 80 static irqreturn_t logibm_interrupt(int irq, void *dev_id) 81 { 82 char dx, dy; 83 unsigned char buttons; 84 85 outb(LOGIBM_READ_X_LOW, LOGIBM_CONTROL_PORT); 86 dx = (inb(LOGIBM_DATA_PORT) & 0xf); 87 outb(LOGIBM_READ_X_HIGH, LOGIBM_CONTROL_PORT); 88 dx |= (inb(LOGIBM_DATA_PORT) & 0xf) << 4; 89 outb(LOGIBM_READ_Y_LOW, LOGIBM_CONTROL_PORT); 90 dy = (inb(LOGIBM_DATA_PORT) & 0xf); 91 outb(LOGIBM_READ_Y_HIGH, LOGIBM_CONTROL_PORT); 92 buttons = inb(LOGIBM_DATA_PORT); 93 dy |= (buttons & 0xf) << 4; 94 buttons = ~buttons >> 5; 95 96 input_report_rel(logibm_dev, REL_X, dx); 97 input_report_rel(logibm_dev, REL_Y, dy); 98 input_report_key(logibm_dev, BTN_RIGHT, buttons & 1); 99 input_report_key(logibm_dev, BTN_MIDDLE, buttons & 2); 100 input_report_key(logibm_dev, BTN_LEFT, buttons & 4); 101 input_sync(logibm_dev); 102 103 outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT); 104 return IRQ_HANDLED; 105 } 106 107 static int logibm_open(struct input_dev *dev) 108 { 109 if (request_irq(logibm_irq, logibm_interrupt, 0, "logibm", NULL)) { 110 printk(KERN_ERR "logibm.c: Can't allocate irq %d\n", logibm_irq); 111 return -EBUSY; 112 } 113 outb(LOGIBM_ENABLE_IRQ, LOGIBM_CONTROL_PORT); 114 return 0; 115 } 116 117 static void logibm_close(struct input_dev *dev) 118 { 119 outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT); 120 free_irq(logibm_irq, NULL); 121 } 122 123 static int __init logibm_init(void) 124 { 125 int err; 126 127 if (!request_region(LOGIBM_BASE, LOGIBM_EXTENT, "logibm")) { 128 printk(KERN_ERR "logibm.c: Can't allocate ports at %#x\n", LOGIBM_BASE); 129 return -EBUSY; 130 } 131 132 outb(LOGIBM_CONFIG_BYTE, LOGIBM_CONFIG_PORT); 133 outb(LOGIBM_SIGNATURE_BYTE, LOGIBM_SIGNATURE_PORT); 134 udelay(100); 135 136 if (inb(LOGIBM_SIGNATURE_PORT) != LOGIBM_SIGNATURE_BYTE) { 137 printk(KERN_ERR "logibm.c: Didn't find Logitech busmouse at %#x\n", LOGIBM_BASE); 138 err = -ENODEV; 139 goto err_release_region; 140 } 141 142 outb(LOGIBM_DEFAULT_MODE, LOGIBM_CONFIG_PORT); 143 outb(LOGIBM_DISABLE_IRQ, LOGIBM_CONTROL_PORT); 144 145 logibm_dev = input_allocate_device(); 146 if (!logibm_dev) { 147 printk(KERN_ERR "logibm.c: Not enough memory for input device\n"); 148 err = -ENOMEM; 149 goto err_release_region; 150 } 151 152 logibm_dev->name = "Logitech bus mouse"; 153 logibm_dev->phys = "isa023c/input0"; 154 logibm_dev->id.bustype = BUS_ISA; 155 logibm_dev->id.vendor = 0x0003; 156 logibm_dev->id.product = 0x0001; 157 logibm_dev->id.version = 0x0100; 158 159 logibm_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL); 160 logibm_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 161 logibm_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y); 162 163 logibm_dev->open = logibm_open; 164 logibm_dev->close = logibm_close; 165 166 err = input_register_device(logibm_dev); 167 if (err) 168 goto err_free_dev; 169 170 return 0; 171 172 err_free_dev: 173 input_free_device(logibm_dev); 174 err_release_region: 175 release_region(LOGIBM_BASE, LOGIBM_EXTENT); 176 177 return err; 178 } 179 180 static void __exit logibm_exit(void) 181 { 182 input_unregister_device(logibm_dev); 183 release_region(LOGIBM_BASE, LOGIBM_EXTENT); 184 } 185 186 module_init(logibm_init); 187 module_exit(logibm_exit); 188