| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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_used = 0; |
| 37 | static int amimouse_lastx, amimouse_lasty; |
| 38 | static struct input_dev amimouse_dev; |
| 39 | |
| 40 | static char *amimouse_name = "Amiga mouse"; |
| 41 | static char *amimouse_phys = "amimouse/input0"; |
| 42 | |
| 43 | static irqreturn_t amimouse_interrupt(int irq, void *dummy, struct pt_regs *fp) |
| 44 | { |
| 45 | unsigned short joy0dat, potgor; |
| 46 | int nx, ny, dx, dy; |
| 47 | |
| 48 | joy0dat = custom.joy0dat; |
| 49 | |
| 50 | nx = joy0dat & 0xff; |
| 51 | ny = joy0dat >> 8; |
| 52 | |
| 53 | dx = nx - amimouse_lastx; |
| 54 | dy = ny - amimouse_lasty; |
| 55 | |
| 56 | if (dx < -127) dx = (256 + nx) - amimouse_lastx; |
| 57 | if (dx > 127) dx = (nx - 256) - amimouse_lastx; |
| 58 | if (dy < -127) dy = (256 + ny) - amimouse_lasty; |
| 59 | if (dy > 127) dy = (ny - 256) - amimouse_lasty; |
| 60 | |
| 61 | amimouse_lastx = nx; |
| 62 | amimouse_lasty = ny; |
| 63 | |
| 64 | potgor = custom.potgor; |
| 65 | |
| 66 | input_regs(&amimouse_dev, fp); |
| 67 | |
| 68 | input_report_rel(&amimouse_dev, REL_X, dx); |
| 69 | input_report_rel(&amimouse_dev, REL_Y, dy); |
| 70 | |
| 71 | input_report_key(&amimouse_dev, BTN_LEFT, ciaa.pra & 0x40); |
| 72 | input_report_key(&amimouse_dev, BTN_MIDDLE, potgor & 0x0100); |
| 73 | input_report_key(&amimouse_dev, BTN_RIGHT, potgor & 0x0400); |
| 74 | |
| 75 | input_sync(&amimouse_dev); |
| 76 | |
| 77 | return IRQ_HANDLED; |
| 78 | } |
| 79 | |
| 80 | static int amimouse_open(struct input_dev *dev) |
| 81 | { |
| 82 | unsigned short joy0dat; |
| 83 | |
| 84 | if (amimouse_used++) |
| 85 | return 0; |
| 86 | |
| 87 | joy0dat = custom.joy0dat; |
| 88 | |
| 89 | amimouse_lastx = joy0dat & 0xff; |
| 90 | amimouse_lasty = joy0dat >> 8; |
| 91 | |
| 92 | if (request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", amimouse_interrupt)) { |
| 93 | amimouse_used--; |
| 94 | printk(KERN_ERR "amimouse.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); |
| 95 | return -EBUSY; |
| 96 | } |
| 97 | |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | static void amimouse_close(struct input_dev *dev) |
| 102 | { |
| 103 | if (!--amimouse_used) |
| 104 | free_irq(IRQ_AMIGA_VERTB, amimouse_interrupt); |
| 105 | } |
| 106 | |
| 107 | static int __init amimouse_init(void) |
| 108 | { |
| 109 | if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_MOUSE)) |
| 110 | return -ENODEV; |
| 111 | |
| 112 | amimouse_dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL); |
| 113 | amimouse_dev.relbit[0] = BIT(REL_X) | BIT(REL_Y); |
| 114 | amimouse_dev.keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); |
| 115 | amimouse_dev.open = amimouse_open; |
| 116 | amimouse_dev.close = amimouse_close; |
| 117 | |
| 118 | amimouse_dev.name = amimouse_name; |
| 119 | amimouse_dev.phys = amimouse_phys; |
| 120 | amimouse_dev.id.bustype = BUS_AMIGA; |
| 121 | amimouse_dev.id.vendor = 0x0001; |
| 122 | amimouse_dev.id.product = 0x0002; |
| 123 | amimouse_dev.id.version = 0x0100; |
| 124 | |
| 125 | input_register_device(&amimouse_dev); |
| 126 | |
| 127 | printk(KERN_INFO "input: %s at joy0dat\n", amimouse_name); |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static void __exit amimouse_exit(void) |
| 132 | { |
| 133 | input_unregister_device(&amimouse_dev); |
| 134 | } |
| 135 | |
| 136 | module_init(amimouse_init); |
| 137 | module_exit(amimouse_exit); |