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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 LT |
36 | static int amimouse_lastx, amimouse_lasty; |
37 | static struct input_dev amimouse_dev; | |
38 | ||
39 | static char *amimouse_name = "Amiga mouse"; | |
40 | static char *amimouse_phys = "amimouse/input0"; | |
41 | ||
42 | static irqreturn_t amimouse_interrupt(int irq, void *dummy, struct pt_regs *fp) | |
43 | { | |
44 | unsigned short joy0dat, potgor; | |
45 | int nx, ny, dx, dy; | |
46 | ||
47 | joy0dat = custom.joy0dat; | |
48 | ||
49 | nx = joy0dat & 0xff; | |
50 | ny = joy0dat >> 8; | |
51 | ||
52 | dx = nx - amimouse_lastx; | |
53 | dy = ny - amimouse_lasty; | |
54 | ||
55 | if (dx < -127) dx = (256 + nx) - amimouse_lastx; | |
56 | if (dx > 127) dx = (nx - 256) - amimouse_lastx; | |
57 | if (dy < -127) dy = (256 + ny) - amimouse_lasty; | |
58 | if (dy > 127) dy = (ny - 256) - amimouse_lasty; | |
59 | ||
60 | amimouse_lastx = nx; | |
61 | amimouse_lasty = ny; | |
62 | ||
63 | potgor = custom.potgor; | |
64 | ||
65 | input_regs(&amimouse_dev, fp); | |
66 | ||
67 | input_report_rel(&amimouse_dev, REL_X, dx); | |
68 | input_report_rel(&amimouse_dev, REL_Y, dy); | |
69 | ||
70 | input_report_key(&amimouse_dev, BTN_LEFT, ciaa.pra & 0x40); | |
71 | input_report_key(&amimouse_dev, BTN_MIDDLE, potgor & 0x0100); | |
72 | input_report_key(&amimouse_dev, BTN_RIGHT, potgor & 0x0400); | |
73 | ||
74 | input_sync(&amimouse_dev); | |
75 | ||
76 | return IRQ_HANDLED; | |
77 | } | |
78 | ||
79 | static int amimouse_open(struct input_dev *dev) | |
80 | { | |
81 | unsigned short joy0dat; | |
82 | ||
1da177e4 LT |
83 | joy0dat = custom.joy0dat; |
84 | ||
85 | amimouse_lastx = joy0dat & 0xff; | |
86 | amimouse_lasty = joy0dat >> 8; | |
87 | ||
88 | if (request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", amimouse_interrupt)) { | |
1da177e4 LT |
89 | printk(KERN_ERR "amimouse.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); |
90 | return -EBUSY; | |
91 | } | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | static void amimouse_close(struct input_dev *dev) | |
97 | { | |
3108d42d | 98 | free_irq(IRQ_AMIGA_VERTB, amimouse_interrupt); |
1da177e4 LT |
99 | } |
100 | ||
101 | static int __init amimouse_init(void) | |
102 | { | |
103 | if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_MOUSE)) | |
104 | return -ENODEV; | |
105 | ||
106 | amimouse_dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL); | |
107 | amimouse_dev.relbit[0] = BIT(REL_X) | BIT(REL_Y); | |
108 | amimouse_dev.keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); | |
109 | amimouse_dev.open = amimouse_open; | |
110 | amimouse_dev.close = amimouse_close; | |
111 | ||
112 | amimouse_dev.name = amimouse_name; | |
113 | amimouse_dev.phys = amimouse_phys; | |
114 | amimouse_dev.id.bustype = BUS_AMIGA; | |
115 | amimouse_dev.id.vendor = 0x0001; | |
116 | amimouse_dev.id.product = 0x0002; | |
117 | amimouse_dev.id.version = 0x0100; | |
118 | ||
119 | input_register_device(&amimouse_dev); | |
120 | ||
121 | printk(KERN_INFO "input: %s at joy0dat\n", amimouse_name); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static void __exit amimouse_exit(void) | |
126 | { | |
127 | input_unregister_device(&amimouse_dev); | |
128 | } | |
129 | ||
130 | module_init(amimouse_init); | |
131 | module_exit(amimouse_exit); |