drivers/input/mouse/inport.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 1999-2001 Vojtech Pavlik
   4  *
   5  *  Based on the work of:
   6  *      Teemu Rantanen          Derrick Cole
   7  *      Peter Cervasio          Christoph Niemann
   8  *      Philip Blundell         Russell King
   9  *      Bob Harris
  10  */
  11
  12 /*
  13  * Inport (ATI XL and Microsoft) busmouse driver for Linux
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/ioport.h>
  18 #include <linux/init.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/input.h>
  21
  22 #include <asm/io.h>
  23 #include <asm/irq.h>
  24
  25 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  26 MODULE_DESCRIPTION("Inport (ATI XL and Microsoft) busmouse driver");
  27 MODULE_LICENSE("GPL");
  28
  29 #define INPORT_BASE             0x23c
  30 #define INPORT_EXTENT           4
  31
  32 #define INPORT_CONTROL_PORT     INPORT_BASE + 0
  33 #define INPORT_DATA_PORT        INPORT_BASE + 1
  34 #define INPORT_SIGNATURE_PORT   INPORT_BASE + 2
  35
  36 #define INPORT_REG_BTNS 0x00
  37 #define INPORT_REG_X            0x01
  38 #define INPORT_REG_Y            0x02
  39 #define INPORT_REG_MODE         0x07
  40 #define INPORT_RESET            0x80
  41
  42 #ifdef CONFIG_MOUSE_ATIXL
  43 #define INPORT_NAME             "ATI XL Mouse"
  44 #define INPORT_VENDOR           0x0002
  45 #define INPORT_SPEED_30HZ       0x01
  46 #define INPORT_SPEED_50HZ       0x02
  47 #define INPORT_SPEED_100HZ      0x03
  48 #define INPORT_SPEED_200HZ      0x04
  49 #define INPORT_MODE_BASE        INPORT_SPEED_100HZ
  50 #define INPORT_MODE_IRQ         0x08
  51 #else
  52 #define INPORT_NAME             "Microsoft InPort Mouse"
  53 #define INPORT_VENDOR           0x0001
  54 #define INPORT_MODE_BASE        0x10
  55 #define INPORT_MODE_IRQ         0x01
  56 #endif
  57 #define INPORT_MODE_HOLD        0x20
  58
  59 #define INPORT_IRQ              5
  60
  61 static int inport_irq = INPORT_IRQ;
  62 module_param_hw_named(irq, inport_irq, uint, irq, 0);
  63 MODULE_PARM_DESC(irq, "IRQ number (5=default)");
  64
  65 static struct input_dev *inport_dev;
  66
  67 static irqreturn_t inport_interrupt(int irq, void *dev_id)
  68 {
  69         unsigned char buttons;
  70
  71         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
  72         outb(INPORT_MODE_HOLD | INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
  73
  74         outb(INPORT_REG_X, INPORT_CONTROL_PORT);
  75         input_report_rel(inport_dev, REL_X, inb(INPORT_DATA_PORT));
  76
  77         outb(INPORT_REG_Y, INPORT_CONTROL_PORT);
  78         input_report_rel(inport_dev, REL_Y, inb(INPORT_DATA_PORT));
  79
  80         outb(INPORT_REG_BTNS, INPORT_CONTROL_PORT);
  81         buttons = inb(INPORT_DATA_PORT);
  82
  83         input_report_key(inport_dev, BTN_MIDDLE, buttons & 1);
  84         input_report_key(inport_dev, BTN_LEFT,   buttons & 2);
  85         input_report_key(inport_dev, BTN_RIGHT,  buttons & 4);
  86
  87         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
  88         outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
  89
  90         input_sync(inport_dev);
  91         return IRQ_HANDLED;
  92 }
  93
  94 static int inport_open(struct input_dev *dev)
  95 {
  96         if (request_irq(inport_irq, inport_interrupt, 0, "inport", NULL))
  97                 return -EBUSY;
  98         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
  99         outb(INPORT_MODE_IRQ | INPORT_MODE_BASE, INPORT_DATA_PORT);
 100
 101         return 0;
 102 }
 103
 104 static void inport_close(struct input_dev *dev)
 105 {
 106         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 107         outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
 108         free_irq(inport_irq, NULL);
 109 }
 110
 111 static int __init inport_init(void)
 112 {
 113         unsigned char a, b, c;
 114         int err;
 115
 116         if (!request_region(INPORT_BASE, INPORT_EXTENT, "inport")) {
 117                 printk(KERN_ERR "inport.c: Can't allocate ports at %#x\n", INPORT_BASE);
 118                 return -EBUSY;
 119         }
 120
 121         a = inb(INPORT_SIGNATURE_PORT);
 122         b = inb(INPORT_SIGNATURE_PORT);
 123         c = inb(INPORT_SIGNATURE_PORT);
 124         if (a == b || a != c) {
 125                 printk(KERN_INFO "inport.c: Didn't find InPort mouse at %#x\n", INPORT_BASE);
 126                 err = -ENODEV;
 127                 goto err_release_region;
 128         }
 129
 130         inport_dev = input_allocate_device();
 131         if (!inport_dev) {
 132                 printk(KERN_ERR "inport.c: Not enough memory for input device\n");
 133                 err = -ENOMEM;
 134                 goto err_release_region;
 135         }
 136
 137         inport_dev->name = INPORT_NAME;
 138         inport_dev->phys = "isa023c/input0";
 139         inport_dev->id.bustype = BUS_ISA;
 140         inport_dev->id.vendor  = INPORT_VENDOR;
 141         inport_dev->id.product = 0x0001;
 142         inport_dev->id.version = 0x0100;
 143
 144         inport_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 145         inport_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
 146                 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 147         inport_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 148
 149         inport_dev->open  = inport_open;
 150         inport_dev->close = inport_close;
 151
 152         outb(INPORT_RESET, INPORT_CONTROL_PORT);
 153         outb(INPORT_REG_MODE, INPORT_CONTROL_PORT);
 154         outb(INPORT_MODE_BASE, INPORT_DATA_PORT);
 155
 156         err = input_register_device(inport_dev);
 157         if (err)
 158                 goto err_free_dev;
 159
 160         return 0;
 161
 162  err_free_dev:
 163         input_free_device(inport_dev);
 164  err_release_region:
 165         release_region(INPORT_BASE, INPORT_EXTENT);
 166
 167         return err;
 168 }
 169
 170 static void __exit inport_exit(void)
 171 {
 172         input_unregister_device(inport_dev);
 173         release_region(INPORT_BASE, INPORT_EXTENT);
 174 }
 175
 176 module_init(inport_init);
 177 module_exit(inport_exit);