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
  31 #include <linux/module.h>
  32 #include <linux/ioport.h>
  33 #include <linux/init.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/input.h>
  36
  37 #include <asm/io.h>
  38 #include <asm/irq.h>
  39
  40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  41 MODULE_DESCRIPTION("Inport (ATI XL and Microsoft) busmouse driver");
  42 MODULE_LICENSE("GPL");
  43
  44 #define INPORT_BASE             0x23c
  45 #define INPORT_EXTENT           4
  46
  47 #define INPORT_CONTROL_PORT     INPORT_BASE + 0
  48 #define INPORT_DATA_PORT        INPORT_BASE + 1
  49 #define INPORT_SIGNATURE_PORT   INPORT_BASE + 2
  50
  51 #define INPORT_REG_BTNS 0x00
  52 #define INPORT_REG_X            0x01
  53 #define INPORT_REG_Y            0x02
  54 #define INPORT_REG_MODE         0x07
  55 #define INPORT_RESET            0x80
  56
  57 #ifdef CONFIG_MOUSE_ATIXL
  58 #define INPORT_NAME             "ATI XL Mouse"
  59 #define INPORT_VENDOR           0x0002
  60 #define INPORT_SPEED_30HZ       0x01
  61 #define INPORT_SPEED_50HZ       0x02
  62 #define INPORT_SPEED_100HZ      0x03
  63 #define INPORT_SPEED_200HZ      0x04
  64 #define INPORT_MODE_BASE        INPORT_SPEED_100HZ
  65 #define INPORT_MODE_IRQ         0x08
  66 #else
  67 #define INPORT_NAME             "Microsoft InPort Mouse"
  68 #define INPORT_VENDOR           0x0001
  69 #define INPORT_MODE_BASE        0x10
  70 #define INPORT_MODE_IRQ         0x01
  71 #endif
  72 #define INPORT_MODE_HOLD        0x20
  73
  74 #define INPORT_IRQ              5
  75
  76 static int inport_irq = INPORT_IRQ;
  77 module_param_hw_named(irq, inport_irq, uint, irq, 0);
  78 MODULE_PARM_DESC(irq, "IRQ number (5=default)");
  79
  80 static struct input_dev *inport_dev;
  81
  82 static irqreturn_t inport_interrupt(int irq, void *dev_id)
  83 {
  84         unsigned char buttons;
  85
  86         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
  87         outb(INPORT_MODE_HOLD | INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
  88
  89         outb(INPORT_REG_X, INPORT_CONTROL_PORT);
  90         input_report_rel(inport_dev, REL_X, inb(INPORT_DATA_PORT));
  91
  92         outb(INPORT_REG_Y, INPORT_CONTROL_PORT);
  93         input_report_rel(inport_dev, REL_Y, inb(INPORT_DATA_PORT));
  94
  95         outb(INPORT_REG_BTNS, INPORT_CONTROL_PORT);
  96         buttons = inb(INPORT_DATA_PORT);
  97
  98         input_report_key(inport_dev, BTN_MIDDLE, buttons & 1);
  99         input_report_key(inport_dev, BTN_LEFT,   buttons & 2);
 100         input_report_key(inport_dev, BTN_RIGHT,  buttons & 4);
 101
 102         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 103         outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
 104
 105         input_sync(inport_dev);
 106         return IRQ_HANDLED;
 107 }
 108
 109 static int inport_open(struct input_dev *dev)
 110 {
 111         if (request_irq(inport_irq, inport_interrupt, 0, "inport", NULL))
 112                 return -EBUSY;
 113         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 114         outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
 115
 116         return 0;
 117 }
 118
 119 static void inport_close(struct input_dev *dev)
 120 {
 121         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 122         outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
 123         free_irq(inport_irq, NULL);
 124 }
 125
 126 static int __init inport_init(void)
 127 {
 128         unsigned char a, b, c;
 129         int err;
 130
 131         if (!request_region(INPORT_BASE, INPORT_EXTENT, "inport")) {
 132                 printk(KERN_ERR "inport.c: Can't allocate ports at %#x\n", INPORT_BASE);
 133                 return -EBUSY;
 134         }
 135
 136         a = inb(INPORT_SIGNATURE_PORT);
 137         b = inb(INPORT_SIGNATURE_PORT);
 138         c = inb(INPORT_SIGNATURE_PORT);
 139         if (a == b || a != c) {
 140                 printk(KERN_INFO "inport.c: Didn't find InPort mouse at %#x\n", INPORT_BASE);
 141                 err = -ENODEV;
 142                 goto err_release_region;
 143         }
 144
 145         inport_dev = input_allocate_device();
 146         if (!inport_dev) {
 147                 printk(KERN_ERR "inport.c: Not enough memory for input device\n");
 148                 err = -ENOMEM;
 149                 goto err_release_region;
 150         }
 151
 152         inport_dev->name = INPORT_NAME;
 153         inport_dev->phys = "isa023c/input0";
 154         inport_dev->id.bustype = BUS_ISA;
 155         inport_dev->id.vendor  = INPORT_VENDOR;
 156         inport_dev->id.product = 0x0001;
 157         inport_dev->id.version = 0x0100;
 158
 159         inport_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 160         inport_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
 161                 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 162         inport_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 163
 164         inport_dev->open  = inport_open;
 165         inport_dev->close = inport_close;
 166
 167         outb(INPORT_RESET, INPORT_CONTROL_PORT);
 168         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 169         outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
 170
 171         err = input_register_device(inport_dev);
 172         if (err)
 173                 goto err_free_dev;
 174
 175         return 0;
 176
 177  err_free_dev:
 178         input_free_device(inport_dev);
 179  err_release_region:
 180         release_region(INPORT_BASE, INPORT_EXTENT);
 181
 182         return err;
 183 }
 184
 185 static void __exit inport_exit(void)
 186 {
 187         input_unregister_device(inport_dev);
 188         release_region(INPORT_BASE, INPORT_EXTENT);
 189 }
 190
 191 module_init(inport_init);
 192 module_exit(inport_exit);