summaryrefslogtreecommitdiff
path: root/drivers/input/misc/m68kspkr.c
blob: e9f26e766b4d84606a5d0d79dc3f255a825773e9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/*
 *  m68k beeper driver for Linux
 *
 *  Copyright (c) 2002 Richard Zidlicky
 *  Copyright (c) 2002 Vojtech Pavlik
 *  Copyright (c) 1992 Orest Zborowski
 *
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <asm/machdep.h>
#include <asm/io.h>

MODULE_AUTHOR("Richard Zidlicky <rz@linux-m68k.org>");
MODULE_DESCRIPTION("m68k beeper driver");
MODULE_LICENSE("GPL");

static struct platform_device *m68kspkr_platform_device;

static int m68kspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
	unsigned int count = 0;

	if (type != EV_SND)
		return -1;

	switch (code) {
		case SND_BELL: if (value) value = 1000;
		case SND_TONE: break;
		default: return -1;
	}

	if (value > 20 && value < 32767)
		count = 1193182 / value;

	mach_beep(count, -1);

	return 0;
}

static int __devinit m68kspkr_probe(struct platform_device *dev)
{
	struct input_dev *input_dev;
	int err;

	input_dev = input_allocate_device();
	if (!input_dev)
		return -ENOMEM;

	input_dev->name = "m68k beeper";
	input_dev->phys = "m68k/generic";
	input_dev->id.bustype = BUS_HOST;
	input_dev->id.vendor  = 0x001f;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0100;
	input_dev->dev.parent = &dev->dev;

	input_dev->evbit[0] = BIT(EV_SND);
	input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
	input_dev->event = m68kspkr_event;

	err = input_register_device(input_dev);
	if (err) {
		input_free_device(input_dev);
		return err;
	}

	platform_set_drvdata(dev, input_dev);

	return 0;
}

static int __devexit m68kspkr_remove(struct platform_device *dev)
{
	struct input_dev *input_dev = platform_get_drvdata(dev);

	input_unregister_device(input_dev);
	platform_set_drvdata(dev, NULL);
	/* turn off the speaker */
	m68kspkr_event(NULL, EV_SND, SND_BELL, 0);

	return 0;
}

static void m68kspkr_shutdown(struct platform_device *dev)
{
	/* turn off the speaker */
	m68kspkr_event(NULL, EV_SND, SND_BELL, 0);
}

static struct platform_driver m68kspkr_platform_driver = {
	.driver		= {
		.name	= "m68kspkr",
		.owner	= THIS_MODULE,
	},
	.probe		= m68kspkr_probe,
	.remove		= __devexit_p(m68kspkr_remove),
	.shutdown	= m68kspkr_shutdown,
};

static int __init m68kspkr_init(void)
{
	int err;

	if (!mach_beep) {
		printk(KERN_INFO "m68kspkr: no lowlevel beep support\n");
		return -ENODEV;
        }

	err = platform_driver_register(&m68kspkr_platform_driver);
	if (err)
		return err;

	m68kspkr_platform_device = platform_device_alloc("m68kspkr", -1);
	if (!m68kspkr_platform_device) {
		err = -ENOMEM;
		goto err_unregister_driver;
	}

	err = platform_device_add(m68kspkr_platform_device);
	if (err)
		goto err_free_device;

	return 0;

 err_free_device:
	platform_device_put(m68kspkr_platform_device);
 err_unregister_driver:
	platform_driver_unregister(&m68kspkr_platform_driver);

	return err;
}

static void __exit m68kspkr_exit(void)
{
	platform_device_unregister(m68kspkr_platform_device);
	platform_driver_unregister(&m68kspkr_platform_driver);
}

module_init(m68kspkr_init);
module_exit(m68kspkr_exit);