1 /* 2 * Amiga mouse driver for Linux/m68k 3 * 4 * Copyright (c) 2000-2002 Vojtech Pavlik 5 * 6 * Based on the work of: 7 * Michael Rausch James Banks 8 * Matther Dillon David Giller 9 * Nathan Laredo Linus Torvalds 10 * Johan Myreen Jes Sorensen 11 * Russell King 12 */ 13 14 /* 15 * This program is free software; you can redistribute it and/or modify it 16 * under the terms of the GNU General Public License version 2 as published by 17 * the Free Software Foundation 18 */ 19 20 #include <linux/module.h> 21 #include <linux/init.h> 22 #include <linux/input.h> 23 #include <linux/interrupt.h> 24 25 #include <asm/irq.h> 26 #include <asm/setup.h> 27 #include <asm/system.h> 28 #include <asm/uaccess.h> 29 #include <asm/amigahw.h> 30 #include <asm/amigaints.h> 31 32 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 33 MODULE_DESCRIPTION("Amiga mouse driver"); 34 MODULE_LICENSE("GPL"); 35 36 static int amimouse_lastx, amimouse_lasty; 37 static struct input_dev *amimouse_dev; 38 39 static irqreturn_t amimouse_interrupt(int irq, void *dummy) 40 { 41 unsigned short joy0dat, potgor; 42 int nx, ny, dx, dy; 43 44 joy0dat = amiga_custom.joy0dat; 45 46 nx = joy0dat & 0xff; 47 ny = joy0dat >> 8; 48 49 dx = nx - amimouse_lastx; 50 dy = ny - amimouse_lasty; 51 52 if (dx < -127) dx = (256 + nx) - amimouse_lastx; 53 if (dx > 127) dx = (nx - 256) - amimouse_lastx; 54 if (dy < -127) dy = (256 + ny) - amimouse_lasty; 55 if (dy > 127) dy = (ny - 256) - amimouse_lasty; 56 57 amimouse_lastx = nx; 58 amimouse_lasty = ny; 59 60 potgor = amiga_custom.potgor; 61 62 input_report_rel(amimouse_dev, REL_X, dx); 63 input_report_rel(amimouse_dev, REL_Y, dy); 64 65 input_report_key(amimouse_dev, BTN_LEFT, ciaa.pra & 0x40); 66 input_report_key(amimouse_dev, BTN_MIDDLE, potgor & 0x0100); 67 input_report_key(amimouse_dev, BTN_RIGHT, potgor & 0x0400); 68 69 input_sync(amimouse_dev); 70 71 return IRQ_HANDLED; 72 } 73 74 static int amimouse_open(struct input_dev *dev) 75 { 76 unsigned short joy0dat; 77 78 joy0dat = amiga_custom.joy0dat; 79 80 amimouse_lastx = joy0dat & 0xff; 81 amimouse_lasty = joy0dat >> 8; 82 83 if (request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", amimouse_interrupt)) { 84 printk(KERN_ERR "amimouse.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); 85 return -EBUSY; 86 } 87 88 return 0; 89 } 90 91 static void amimouse_close(struct input_dev *dev) 92 { 93 free_irq(IRQ_AMIGA_VERTB, amimouse_interrupt); 94 } 95 96 static int __init amimouse_init(void) 97 { 98 int err; 99 100 if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_MOUSE)) 101 return -ENODEV; 102 103 amimouse_dev = input_allocate_device(); 104 if (!amimouse_dev) 105 return -ENOMEM; 106 107 amimouse_dev->name = "Amiga mouse"; 108 amimouse_dev->phys = "amimouse/input0"; 109 amimouse_dev->id.bustype = BUS_AMIGA; 110 amimouse_dev->id.vendor = 0x0001; 111 amimouse_dev->id.product = 0x0002; 112 amimouse_dev->id.version = 0x0100; 113 114 amimouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 115 amimouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 116 amimouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | 117 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); 118 amimouse_dev->open = amimouse_open; 119 amimouse_dev->close = amimouse_close; 120 121 err = input_register_device(amimouse_dev); 122 if (err) { 123 input_free_device(amimouse_dev); 124 return err; 125 } 126 127 return 0; 128 } 129 130 static void __exit amimouse_exit(void) 131 { 132 input_unregister_device(amimouse_dev); 133 } 134 135 module_init(amimouse_init); 136 module_exit(amimouse_exit); 137