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 int inport_used;
  91
  92 static irqreturn_t inport_interrupt(int irq, void *dev_id, struct pt_regs *regs);
  93
  94 static int inport_open(struct input_dev *dev)
  95 {
  96         if (!inport_used++) {
  97                 if (request_irq(inport_irq, inport_interrupt, 0, "inport", NULL))
  98                         return -EBUSY;
  99                 outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 100                 outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
 101         }
 102
 103         return 0;
 104 }
 105
 106 static void inport_close(struct input_dev *dev)
 107 {
 108         if (!--inport_used) {
 109                 outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 110                 outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
 111                 free_irq(inport_irq, NULL);
 112         }
 113 }
 114
 115 static struct input_dev inport_dev = {
 116         .evbit  = { BIT(EV_KEY) | BIT(EV_REL) },
 117         .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT) },
 118         .relbit = { BIT(REL_X) | BIT(REL_Y) },
 119         .open   = inport_open,
 120         .close  = inport_close,
 121         .name   = INPORT_NAME,
 122         .phys   = "isa023c/input0",
 123         .id = {
 124                 .bustype = BUS_ISA,
 125                 .vendor  = INPORT_VENDOR,
 126                 .product = 0x0001,
 127                 .version = 0x0100,
 128         },
 129 };
 130
 131 static irqreturn_t inport_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 132 {
 133         unsigned char buttons;
 134
 135         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 136         outb(INPORT_MODE_HOLD | INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
 137
 138         input_regs(&inport_dev, regs);
 139
 140         outb(INPORT_REG_X, INPORT_CONTROL_PORT);
 141         input_report_rel(&inport_dev, REL_X, inb(INPORT_DATA_PORT));
 142
 143         outb(INPORT_REG_Y, INPORT_CONTROL_PORT);
 144         input_report_rel(&inport_dev, REL_Y, inb(INPORT_DATA_PORT));
 145
 146         outb(INPORT_REG_BTNS, INPORT_CONTROL_PORT);
 147         buttons = inb(INPORT_DATA_PORT);
 148
 149         input_report_key(&inport_dev, BTN_MIDDLE, buttons & 1);
 150         input_report_key(&inport_dev, BTN_LEFT,   buttons & 2);
 151         input_report_key(&inport_dev, BTN_RIGHT,  buttons & 4);
 152
 153         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 154         outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
 155
 156         input_sync(&inport_dev);
 157         return IRQ_HANDLED;
 158 }
 159
 160 static int __init inport_init(void)
 161 {
 162         unsigned char a,b,c;
 163
 164         if (!request_region(INPORT_BASE, INPORT_EXTENT, "inport")) {
 165                 printk(KERN_ERR "inport.c: Can't allocate ports at %#x\n", INPORT_BASE);
 166                 return -EBUSY;
 167         }
 168
 169         a = inb(INPORT_SIGNATURE_PORT);
 170         b = inb(INPORT_SIGNATURE_PORT);
 171         c = inb(INPORT_SIGNATURE_PORT);
 172         if (( a == b ) || ( a != c )) {
 173                 release_region(INPORT_BASE, INPORT_EXTENT);
 174                 printk(KERN_ERR "inport.c: Didn't find InPort mouse at %#x\n", INPORT_BASE);
 175                 return -ENODEV;
 176         }
 177
 178         outb(INPORT_RESET, INPORT_CONTROL_PORT);
 179         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 180         outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
 181
 182         input_register_device(&inport_dev);
 183
 184         printk(KERN_INFO "input: " INPORT_NAME " at %#x irq %d\n", INPORT_BASE, inport_irq);
 185
 186         return 0;
 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);