tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * m68k beeper driver for Linux
3 *
4 * Copyright (c) 2002 Richard Zidlicky
5 * Copyright (c) 2002 Vojtech Pavlik
6 * Copyright (c) 1992 Orest Zborowski
7 *
8 */
9
10/*
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 as published by
13 * the Free Software Foundation
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/input.h>
20#include <asm/machdep.h>
21#include <asm/io.h>
22
23MODULE_AUTHOR("Richard Zidlicky <rz@linux-m68k.org>");
24MODULE_DESCRIPTION("m68k beeper driver");
25MODULE_LICENSE("GPL");
26
27static char m68kspkr_name[] = "m68k beeper";
28static char m68kspkr_phys[] = "m68k/generic";
29static struct input_dev m68kspkr_dev;
30
31static int m68kspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
32{
33 unsigned int count = 0;
34
35 if (type != EV_SND)
36 return -1;
37
38 switch (code) {
39 case SND_BELL: if (value) value = 1000;
40 case SND_TONE: break;
41 default: return -1;
42 }
43
44 if (value > 20 && value < 32767)
45 count = 1193182 / value;
46
47 mach_beep(count, -1);
48
49 return 0;
50}
51
52static int __init m68kspkr_init(void)
53{
54 if (!mach_beep){
55 printk("%s: no lowlevel beep support\n", m68kspkr_name);
56 return -1;
57 }
58
59 m68kspkr_dev.evbit[0] = BIT(EV_SND);
60 m68kspkr_dev.sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
61 m68kspkr_dev.event = m68kspkr_event;
62
63 m68kspkr_dev.name = m68kspkr_name;
64 m68kspkr_dev.phys = m68kspkr_phys;
65 m68kspkr_dev.id.bustype = BUS_HOST;
66 m68kspkr_dev.id.vendor = 0x001f;
67 m68kspkr_dev.id.product = 0x0001;
68 m68kspkr_dev.id.version = 0x0100;
69
70 input_register_device(&m68kspkr_dev);
71
72 printk(KERN_INFO "input: %s\n", m68kspkr_name);
73
74 return 0;
75}
76
77static void __exit m68kspkr_exit(void)
78{
79 input_unregister_device(&m68kspkr_dev);
80}
81
82module_init(m68kspkr_init);
83module_exit(m68kspkr_exit);