drivers/input/mouse/logibm.c

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