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/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_INFO "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_MASK(EV_KEY) | BIT_MASK(EV_REL);
 160         logibm_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
 161                 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 162         logibm_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 163
 164         logibm_dev->open  = logibm_open;
 165         logibm_dev->close = logibm_close;
 166
 167         err = input_register_device(logibm_dev);
 168         if (err)
 169                 goto err_free_dev;
 170
 171         return 0;
 172
 173  err_free_dev:
 174         input_free_device(logibm_dev);
 175  err_release_region:
 176         release_region(LOGIBM_BASE, LOGIBM_EXTENT);
 177
 178         return err;
 179 }
 180
 181 static void __exit logibm_exit(void)
 182 {
 183         input_unregister_device(logibm_dev);
 184         release_region(LOGIBM_BASE, LOGIBM_EXTENT);
 185 }
 186
 187 module_init(logibm_init);
 188 module_exit(logibm_exit);