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