drivers/input/mouse/inport.c

   1 /*
   2  * $Id: inport.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  *      Teemu Rantanen          Derrick Cole
   8  *      Peter Cervasio          Christoph Niemann
   9  *      Philip Blundell         Russell King
  10  *      Bob Harris
  11  */
  12
  13 /*
  14  * Inport (ATI XL and Microsoft) busmouse driver for Linux
  15  */
  16
  17 /*
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2 of the License, or
  21  * (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  31  *
  32  * Should you need to contact me, the author, you can do so either by
  33  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  34  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  35  */
  36
  37 #include <linux/module.h>
  38 #include <linux/moduleparam.h>
  39 #include <linux/ioport.h>
  40 #include <linux/init.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/input.h>
  43
  44 #include <asm/io.h>
  45 #include <asm/irq.h>
  46
  47 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  48 MODULE_DESCRIPTION("Inport (ATI XL and Microsoft) busmouse driver");
  49 MODULE_LICENSE("GPL");
  50
  51 #define INPORT_BASE             0x23c
  52 #define INPORT_EXTENT           4
  53
  54 #define INPORT_CONTROL_PORT     INPORT_BASE + 0
  55 #define INPORT_DATA_PORT        INPORT_BASE + 1
  56 #define INPORT_SIGNATURE_PORT   INPORT_BASE + 2
  57
  58 #define INPORT_REG_BTNS 0x00
  59 #define INPORT_REG_X            0x01
  60 #define INPORT_REG_Y            0x02
  61 #define INPORT_REG_MODE         0x07
  62 #define INPORT_RESET            0x80
  63
  64 #ifdef CONFIG_MOUSE_ATIXL
  65 #define INPORT_NAME             "ATI XL Mouse"
  66 #define INPORT_VENDOR           0x0002
  67 #define INPORT_SPEED_30HZ       0x01
  68 #define INPORT_SPEED_50HZ       0x02
  69 #define INPORT_SPEED_100HZ      0x03
  70 #define INPORT_SPEED_200HZ      0x04
  71 #define INPORT_MODE_BASE        INPORT_SPEED_100HZ
  72 #define INPORT_MODE_IRQ         0x08
  73 #else
  74 #define INPORT_NAME             "Microsoft InPort Mouse"
  75 #define INPORT_VENDOR           0x0001
  76 #define INPORT_MODE_BASE        0x10
  77 #define INPORT_MODE_IRQ         0x01
  78 #endif
  79 #define INPORT_MODE_HOLD        0x20
  80
  81 #define INPORT_IRQ              5
  82
  83 static int inport_irq = INPORT_IRQ;
  84 module_param_named(irq, inport_irq, uint, 0);
  85 MODULE_PARM_DESC(irq, "IRQ number (5=default)");
  86
  87 static struct input_dev *inport_dev;
  88
  89 static irqreturn_t inport_interrupt(int irq, void *dev_id)
  90 {
  91         unsigned char buttons;
  92
  93         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
  94         outb(INPORT_MODE_HOLD | INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
  95
  96         outb(INPORT_REG_X, INPORT_CONTROL_PORT);
  97         input_report_rel(inport_dev, REL_X, inb(INPORT_DATA_PORT));
  98
  99         outb(INPORT_REG_Y, INPORT_CONTROL_PORT);
 100         input_report_rel(inport_dev, REL_Y, inb(INPORT_DATA_PORT));
 101
 102         outb(INPORT_REG_BTNS, INPORT_CONTROL_PORT);
 103         buttons = inb(INPORT_DATA_PORT);
 104
 105         input_report_key(inport_dev, BTN_MIDDLE, buttons & 1);
 106         input_report_key(inport_dev, BTN_LEFT,   buttons & 2);
 107         input_report_key(inport_dev, BTN_RIGHT,  buttons & 4);
 108
 109         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 110         outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
 111
 112         input_sync(inport_dev);
 113         return IRQ_HANDLED;
 114 }
 115
 116 static int inport_open(struct input_dev *dev)
 117 {
 118         if (request_irq(inport_irq, inport_interrupt, 0, "inport", NULL))
 119                 return -EBUSY;
 120         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 121         outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
 122
 123         return 0;
 124 }
 125
 126 static void inport_close(struct input_dev *dev)
 127 {
 128         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 129         outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
 130         free_irq(inport_irq, NULL);
 131 }
 132
 133 static int __init inport_init(void)
 134 {
 135         unsigned char a, b, c;
 136         int err;
 137
 138         if (!request_region(INPORT_BASE, INPORT_EXTENT, "inport")) {
 139                 printk(KERN_ERR "inport.c: Can't allocate ports at %#x\n", INPORT_BASE);
 140                 return -EBUSY;
 141         }
 142
 143         a = inb(INPORT_SIGNATURE_PORT);
 144         b = inb(INPORT_SIGNATURE_PORT);
 145         c = inb(INPORT_SIGNATURE_PORT);
 146         if (a == b || a != c) {
 147                 printk(KERN_ERR "inport.c: Didn't find InPort mouse at %#x\n", INPORT_BASE);
 148                 err = -ENODEV;
 149                 goto err_release_region;
 150         }
 151
 152         inport_dev = input_allocate_device();
 153         if (!inport_dev) {
 154                 printk(KERN_ERR "inport.c: Not enough memory for input device\n");
 155                 err = -ENOMEM;
 156                 goto err_release_region;
 157         }
 158
 159         inport_dev->name = INPORT_NAME;
 160         inport_dev->phys = "isa023c/input0";
 161         inport_dev->id.bustype = BUS_ISA;
 162         inport_dev->id.vendor  = INPORT_VENDOR;
 163         inport_dev->id.product = 0x0001;
 164         inport_dev->id.version = 0x0100;
 165
 166         inport_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
 167         inport_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 168         inport_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
 169
 170         inport_dev->open  = inport_open;
 171         inport_dev->close = inport_close;
 172
 173         outb(INPORT_RESET, INPORT_CONTROL_PORT);
 174         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 175         outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
 176
 177         err = input_register_device(inport_dev);
 178         if (err)
 179                 goto err_free_dev;
 180
 181         return 0;
 182
 183  err_free_dev:
 184         input_free_device(inport_dev);
 185  err_release_region:
 186         release_region(INPORT_BASE, INPORT_EXTENT);
 187
 188         return err;
 189 }
 190
 191 static void __exit inport_exit(void)
 192 {
 193         input_unregister_device(inport_dev);
 194         release_region(INPORT_BASE, INPORT_EXTENT);
 195 }
 196
 197 module_init(inport_init);
 198 module_exit(inport_exit);