Subversion Repositories shark

Rev

Rev 522 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
494 giacomo 1
/*
2
 *  PC Speaker beeper driver for Linux
3
 *
4
 *  Copyright (c) 2002 Vojtech Pavlik
5
 *  Copyright (c) 1992 Orest Zborowski
6
 *
7
 */
8
 
9
/*
10
 * This program is free software; you can redistribute it and/or modify it
11
 * under the terms of the GNU General Public License version 2 as published by
12
 * the Free Software Foundation
13
 */
14
 
15
#include <linuxcomp.h>
16
 
17
#include <linux/kernel.h>
18
#include <linux/module.h>
19
#include <linux/init.h>
20
#include <linux/input.h>
21
#include <asm/io.h>
22
 
23
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
24
MODULE_DESCRIPTION("PC Speaker beeper driver");
25
MODULE_LICENSE("GPL");
26
 
27
static char pcspkr_name[] = "PC Speaker";
28
static char pcspkr_phys[] = "isa0061/input0";
29
static struct input_dev pcspkr_dev;
30
 
31
spinlock_t i8253_beep_lock = SPIN_LOCK_UNLOCKED;
32
 
33
static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
34
{
35
        unsigned int count = 0;
36
        unsigned long flags;
37
 
38
        if (type != EV_SND)
39
                return -1;
40
 
41
        switch (code) {
42
                case SND_BELL: if (value) value = 1000;
43
                case SND_TONE: break;
44
                default: return -1;
45
        }
46
 
47
        if (value > 20 && value < 32767)
48
                count = CLOCK_TICK_RATE / value;
49
 
50
        spin_lock_irqsave(&i8253_beep_lock, flags);
51
 
52
        if (count) {
53
                /* enable counter 2 */
54
                outb_p(inb_p(0x61) | 3, 0x61);
55
                /* set command for counter 2, 2 byte write */
56
                outb_p(0xB6, 0x43);
57
                /* select desired HZ */
58
                outb_p(count & 0xff, 0x42);
59
                outb((count >> 8) & 0xff, 0x42);
60
        } else {
61
                /* disable counter 2 */
62
                outb(inb_p(0x61) & 0xFC, 0x61);
63
        }
64
 
65
        spin_unlock_irqrestore(&i8253_beep_lock, flags);
66
 
67
        return 0;
68
}
69
 
70
/*static*/ int __init pcspkr_init(void)
71
{
72
        pcspkr_dev.evbit[0] = BIT(EV_SND);
73
        pcspkr_dev.sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
74
        pcspkr_dev.event = pcspkr_event;
75
 
76
        pcspkr_dev.name = pcspkr_name;
77
        pcspkr_dev.phys = pcspkr_phys;
78
        pcspkr_dev.id.bustype = BUS_ISA;
79
        pcspkr_dev.id.vendor = 0x001f;
80
        pcspkr_dev.id.product = 0x0001;
81
        pcspkr_dev.id.version = 0x0100;
82
 
83
        input_register_device(&pcspkr_dev);
84
 
523 mauro 85
        printk(KERN_INFO "input: %s\n", pcspkr_name);
494 giacomo 86
 
87
        return 0;
88
}
89
 
90
/*static*/ void __exit pcspkr_exit(void)
91
{
92
        input_unregister_device(&pcspkr_dev);
93
}
94
 
95
module_init(pcspkr_init);
96
module_exit(pcspkr_exit);