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 <linux/platform_device.h>
21#include <asm/machdep.h>
22#include <asm/io.h>
23
24MODULE_AUTHOR("Richard Zidlicky <rz@linux-m68k.org>");
25MODULE_DESCRIPTION("m68k beeper driver");
26MODULE_LICENSE("GPL");
27
28static struct platform_device *m68kspkr_platform_device;
29
30static int m68kspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
31{
32	unsigned int count = 0;
33
34	if (type != EV_SND)
35		return -1;
36
37	switch (code) {
38		case SND_BELL: if (value) value = 1000;
39		case SND_TONE: break;
40		default: return -1;
41	}
42
43	if (value > 20 && value < 32767)
44		count = 1193182 / value;
45
46	mach_beep(count, -1);
47
48	return 0;
49}
50
51static int m68kspkr_probe(struct platform_device *dev)
52{
53	struct input_dev *input_dev;
54	int err;
55
56	input_dev = input_allocate_device();
57	if (!input_dev)
58		return -ENOMEM;
59
60	input_dev->name = "m68k beeper";
61	input_dev->phys = "m68k/generic";
62	input_dev->id.bustype = BUS_HOST;
63	input_dev->id.vendor  = 0x001f;
64	input_dev->id.product = 0x0001;
65	input_dev->id.version = 0x0100;
66	input_dev->dev.parent = &dev->dev;
67
68	input_dev->evbit[0] = BIT_MASK(EV_SND);
69	input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
70	input_dev->event = m68kspkr_event;
71
72	err = input_register_device(input_dev);
73	if (err) {
74		input_free_device(input_dev);
75		return err;
76	}
77
78	platform_set_drvdata(dev, input_dev);
79
80	return 0;
81}
82
83static int m68kspkr_remove(struct platform_device *dev)
84{
85	struct input_dev *input_dev = platform_get_drvdata(dev);
86
87	input_unregister_device(input_dev);
88	/* turn off the speaker */
89	m68kspkr_event(NULL, EV_SND, SND_BELL, 0);
90
91	return 0;
92}
93
94static void m68kspkr_shutdown(struct platform_device *dev)
95{
96	/* turn off the speaker */
97	m68kspkr_event(NULL, EV_SND, SND_BELL, 0);
98}
99
100static struct platform_driver m68kspkr_platform_driver = {
101	.driver		= {
102		.name	= "m68kspkr",
103	},
104	.probe		= m68kspkr_probe,
105	.remove		= m68kspkr_remove,
106	.shutdown	= m68kspkr_shutdown,
107};
108
109static int __init m68kspkr_init(void)
110{
111	int err;
112
113	if (!mach_beep) {
114		printk(KERN_INFO "m68kspkr: no lowlevel beep support\n");
115		return -ENODEV;
116        }
117
118	err = platform_driver_register(&m68kspkr_platform_driver);
119	if (err)
120		return err;
121
122	m68kspkr_platform_device = platform_device_alloc("m68kspkr", -1);
123	if (!m68kspkr_platform_device) {
124		err = -ENOMEM;
125		goto err_unregister_driver;
126	}
127
128	err = platform_device_add(m68kspkr_platform_device);
129	if (err)
130		goto err_free_device;
131
132	return 0;
133
134 err_free_device:
135	platform_device_put(m68kspkr_platform_device);
136 err_unregister_driver:
137	platform_driver_unregister(&m68kspkr_platform_driver);
138
139	return err;
140}
141
142static void __exit m68kspkr_exit(void)
143{
144	platform_device_unregister(m68kspkr_platform_device);
145	platform_driver_unregister(&m68kspkr_platform_driver);
146}
147
148module_init(m68kspkr_init);
149module_exit(m68kspkr_exit);
150