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1da177e4 LT |
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 | ||
1da177e4 | 36 | static int amimouse_lastx, amimouse_lasty; |
2e5b636b | 37 | static struct input_dev *amimouse_dev; |
1da177e4 LT |
38 | |
39 | static irqreturn_t amimouse_interrupt(int irq, void *dummy, struct pt_regs *fp) | |
40 | { | |
41 | unsigned short joy0dat, potgor; | |
42 | int nx, ny, dx, dy; | |
43 | ||
44 | joy0dat = 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 = custom.potgor; | |
61 | ||
2e5b636b | 62 | input_regs(amimouse_dev, fp); |
1da177e4 | 63 | |
2e5b636b DT |
64 | input_report_rel(amimouse_dev, REL_X, dx); |
65 | input_report_rel(amimouse_dev, REL_Y, dy); | |
1da177e4 | 66 | |
2e5b636b DT |
67 | input_report_key(amimouse_dev, BTN_LEFT, ciaa.pra & 0x40); |
68 | input_report_key(amimouse_dev, BTN_MIDDLE, potgor & 0x0100); | |
69 | input_report_key(amimouse_dev, BTN_RIGHT, potgor & 0x0400); | |
1da177e4 | 70 | |
2e5b636b | 71 | input_sync(amimouse_dev); |
1da177e4 LT |
72 | |
73 | return IRQ_HANDLED; | |
74 | } | |
75 | ||
76 | static int amimouse_open(struct input_dev *dev) | |
77 | { | |
78 | unsigned short joy0dat; | |
79 | ||
1da177e4 LT |
80 | joy0dat = custom.joy0dat; |
81 | ||
82 | amimouse_lastx = joy0dat & 0xff; | |
83 | amimouse_lasty = joy0dat >> 8; | |
84 | ||
85 | if (request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", amimouse_interrupt)) { | |
1da177e4 LT |
86 | printk(KERN_ERR "amimouse.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); |
87 | return -EBUSY; | |
88 | } | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | static void amimouse_close(struct input_dev *dev) | |
94 | { | |
3108d42d | 95 | free_irq(IRQ_AMIGA_VERTB, amimouse_interrupt); |
1da177e4 LT |
96 | } |
97 | ||
98 | static int __init amimouse_init(void) | |
99 | { | |
100 | if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_MOUSE)) | |
101 | return -ENODEV; | |
102 | ||
2e5b636b DT |
103 | if (!(amimouse_dev = input_allocate_device())) |
104 | return -ENOMEM; | |
105 | ||
106 | amimouse_dev->name = "Amiga mouse"; | |
107 | amimouse_dev->phys = "amimouse/input0"; | |
108 | amimouse_dev->id.bustype = BUS_AMIGA; | |
109 | amimouse_dev->id.vendor = 0x0001; | |
110 | amimouse_dev->id.product = 0x0002; | |
111 | amimouse_dev->id.version = 0x0100; | |
1da177e4 | 112 | |
2e5b636b DT |
113 | amimouse_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL); |
114 | amimouse_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y); | |
115 | amimouse_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); | |
116 | amimouse_dev->open = amimouse_open; | |
117 | amimouse_dev->close = amimouse_close; | |
1da177e4 | 118 | |
2e5b636b | 119 | input_register_device(amimouse_dev); |
1da177e4 | 120 | |
1da177e4 LT |
121 | return 0; |
122 | } | |
123 | ||
124 | static void __exit amimouse_exit(void) | |
125 | { | |
2e5b636b | 126 | input_unregister_device(amimouse_dev); |
1da177e4 LT |
127 | } |
128 | ||
129 | module_init(amimouse_init); | |
130 | module_exit(amimouse_exit); |