drivers/input/mouse/inport.c

   1 /*
   2  *  Copyright (c) 1999-2001 Vojtech Pavlik
   3  *
   4  *  Based on the work of:
   5  *      Teemu Rantanen          Derrick Cole
   6  *      Peter Cervasio          Christoph Niemann
   7  *      Philip Blundell         Russell King
   8  *      Bob Harris
   9  */
  10
  11 /*
  12  * Inport (ATI XL and Microsoft) busmouse driver for Linux
  13  */
  14
  15 /*
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  29  *
  30  * Should you need to contact me, the author, you can do so either by
  31  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  32  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/ioport.h>
  37 #include <linux/init.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/input.h>
  40
  41 #include <asm/io.h>
  42 #include <asm/irq.h>
  43
  44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  45 MODULE_DESCRIPTION("Inport (ATI XL and Microsoft) busmouse driver");
  46 MODULE_LICENSE("GPL");
  47
  48 #define INPORT_BASE             0x23c
  49 #define INPORT_EXTENT           4
  50
  51 #define INPORT_CONTROL_PORT     INPORT_BASE + 0
  52 #define INPORT_DATA_PORT        INPORT_BASE + 1
  53 #define INPORT_SIGNATURE_PORT   INPORT_BASE + 2
  54
  55 #define INPORT_REG_BTNS 0x00
  56 #define INPORT_REG_X            0x01
  57 #define INPORT_REG_Y            0x02
  58 #define INPORT_REG_MODE         0x07
  59 #define INPORT_RESET            0x80
  60
  61 #ifdef CONFIG_MOUSE_ATIXL
  62 #define INPORT_NAME             "ATI XL Mouse"
  63 #define INPORT_VENDOR           0x0002
  64 #define INPORT_SPEED_30HZ       0x01
  65 #define INPORT_SPEED_50HZ       0x02
  66 #define INPORT_SPEED_100HZ      0x03
  67 #define INPORT_SPEED_200HZ      0x04
  68 #define INPORT_MODE_BASE        INPORT_SPEED_100HZ
  69 #define INPORT_MODE_IRQ         0x08
  70 #else
  71 #define INPORT_NAME             "Microsoft InPort Mouse"
  72 #define INPORT_VENDOR           0x0001
  73 #define INPORT_MODE_BASE        0x10
  74 #define INPORT_MODE_IRQ         0x01
  75 #endif
  76 #define INPORT_MODE_HOLD        0x20
  77
  78 #define INPORT_IRQ              5
  79
  80 static int inport_irq = INPORT_IRQ;
  81 module_param_named(irq, inport_irq, uint, 0);
  82 MODULE_PARM_DESC(irq, "IRQ number (5=default)");
  83
  84 static struct input_dev *inport_dev;
  85
  86 static irqreturn_t inport_interrupt(int irq, void *dev_id)
  87 {
  88         unsigned char buttons;
  89
  90         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
  91         outb(INPORT_MODE_HOLD | INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
  92
  93         outb(INPORT_REG_X, INPORT_CONTROL_PORT);
  94         input_report_rel(inport_dev, REL_X, inb(INPORT_DATA_PORT));
  95
  96         outb(INPORT_REG_Y, INPORT_CONTROL_PORT);
  97         input_report_rel(inport_dev, REL_Y, inb(INPORT_DATA_PORT));
  98
  99         outb(INPORT_REG_BTNS, INPORT_CONTROL_PORT);
 100         buttons = inb(INPORT_DATA_PORT);
 101
 102         input_report_key(inport_dev, BTN_MIDDLE, buttons & 1);
 103         input_report_key(inport_dev, BTN_LEFT,   buttons & 2);
 104         input_report_key(inport_dev, BTN_RIGHT,  buttons & 4);
 105
 106         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 107         outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
 108
 109         input_sync(inport_dev);
 110         return IRQ_HANDLED;
 111 }
 112
 113 static int inport_open(struct input_dev *dev)
 114 {
 115         if (request_irq(inport_irq, inport_interrupt, 0, "inport", NULL))
 116                 return -EBUSY;
 117         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 118         outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
 119
 120         return 0;
 121 }
 122
 123 static void inport_close(struct input_dev *dev)
 124 {
 125         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 126         outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
 127         free_irq(inport_irq, NULL);
 128 }
 129
 130 static int __init inport_init(void)
 131 {
 132         unsigned char a, b, c;
 133         int err;
 134
 135         if (!request_region(INPORT_BASE, INPORT_EXTENT, "inport")) {
 136                 printk(KERN_ERR "inport.c: Can't allocate ports at %#x\n", INPORT_BASE);
 137                 return -EBUSY;
 138         }
 139
 140         a = inb(INPORT_SIGNATURE_PORT);
 141         b = inb(INPORT_SIGNATURE_PORT);
 142         c = inb(INPORT_SIGNATURE_PORT);
 143         if (a == b || a != c) {
 144                 printk(KERN_INFO "inport.c: Didn't find InPort mouse at %#x\n", INPORT_BASE);
 145                 err = -ENODEV;
 146                 goto err_release_region;
 147         }
 148
 149         inport_dev = input_allocate_device();
 150         if (!inport_dev) {
 151                 printk(KERN_ERR "inport.c: Not enough memory for input device\n");
 152                 err = -ENOMEM;
 153                 goto err_release_region;
 154         }
 155
 156         inport_dev->name = INPORT_NAME;
 157         inport_dev->phys = "isa023c/input0";
 158         inport_dev->id.bustype = BUS_ISA;
 159         inport_dev->id.vendor  = INPORT_VENDOR;
 160         inport_dev->id.product = 0x0001;
 161         inport_dev->id.version = 0x0100;
 162
 163         inport_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 164         inport_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
 165                 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 166         inport_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 167
 168         inport_dev->open  = inport_open;
 169         inport_dev->close = inport_close;
 170
 171         outb(INPORT_RESET, INPORT_CONTROL_PORT);
 172         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 173         outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
 174
 175         err = input_register_device(inport_dev);
 176         if (err)
 177                 goto err_free_dev;
 178
 179         return 0;
 180
 181  err_free_dev:
 182         input_free_device(inport_dev);
 183  err_release_region:
 184         release_region(INPORT_BASE, INPORT_EXTENT);
 185
 186         return err;
 187 }
 188
 189 static void __exit inport_exit(void)
 190 {
 191         input_unregister_device(inport_dev);
 192         release_region(INPORT_BASE, INPORT_EXTENT);
 193 }
 194
 195 module_init(inport_init);
 196 module_exit(inport_exit);