1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *  m68k beeper driver for Linux
4 *
5 *  Copyright (c) 2002 Richard Zidlicky
6 *  Copyright (c) 2002 Vojtech Pavlik
7 *  Copyright (c) 1992 Orest Zborowski
8 */
9
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/input.h>
15#include <linux/platform_device.h>
16#include <asm/machdep.h>
17#include <asm/io.h>
18
19MODULE_AUTHOR("Richard Zidlicky <rz@linux-m68k.org>");
20MODULE_DESCRIPTION("m68k beeper driver");
21MODULE_LICENSE("GPL");
22
23static struct platform_device *m68kspkr_platform_device;
24
25static int m68kspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
26{
27	unsigned int count = 0;
28
29	if (type != EV_SND)
30		return -1;
31
32	switch (code) {
33		case SND_BELL: if (value) value = 1000;
34		case SND_TONE: break;
35		default: return -1;
36	}
37
38	if (value > 20 && value < 32767)
39		count = 1193182 / value;
40
41	mach_beep(count, -1);
42
43	return 0;
44}
45
46static int m68kspkr_probe(struct platform_device *dev)
47{
48	struct input_dev *input_dev;
49	int err;
50
51	input_dev = input_allocate_device();
52	if (!input_dev)
53		return -ENOMEM;
54
55	input_dev->name = "m68k beeper";
56	input_dev->phys = "m68k/generic";
57	input_dev->id.bustype = BUS_HOST;
58	input_dev->id.vendor  = 0x001f;
59	input_dev->id.product = 0x0001;
60	input_dev->id.version = 0x0100;
61	input_dev->dev.parent = &dev->dev;
62
63	input_dev->evbit[0] = BIT_MASK(EV_SND);
64	input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
65	input_dev->event = m68kspkr_event;
66
67	err = input_register_device(input_dev);
68	if (err) {
69		input_free_device(input_dev);
70		return err;
71	}
72
73	platform_set_drvdata(dev, input_dev);
74
75	return 0;
76}
77
78static int m68kspkr_remove(struct platform_device *dev)
79{
80	struct input_dev *input_dev = platform_get_drvdata(dev);
81
82	input_unregister_device(input_dev);
83	/* turn off the speaker */
84	m68kspkr_event(NULL, EV_SND, SND_BELL, 0);
85
86	return 0;
87}
88
89static void m68kspkr_shutdown(struct platform_device *dev)
90{
91	/* turn off the speaker */
92	m68kspkr_event(NULL, EV_SND, SND_BELL, 0);
93}
94
95static struct platform_driver m68kspkr_platform_driver = {
96	.driver		= {
97		.name	= "m68kspkr",
98	},
99	.probe		= m68kspkr_probe,
100	.remove		= m68kspkr_remove,
101	.shutdown	= m68kspkr_shutdown,
102};
103
104static int __init m68kspkr_init(void)
105{
106	int err;
107
108	if (!mach_beep) {
109		printk(KERN_INFO "m68kspkr: no lowlevel beep support\n");
110		return -ENODEV;
111        }
112
113	err = platform_driver_register(&m68kspkr_platform_driver);
114	if (err)
115		return err;
116
117	m68kspkr_platform_device = platform_device_alloc("m68kspkr", -1);
118	if (!m68kspkr_platform_device) {
119		err = -ENOMEM;
120		goto err_unregister_driver;
121	}
122
123	err = platform_device_add(m68kspkr_platform_device);
124	if (err)
125		goto err_free_device;
126
127	return 0;
128
129 err_free_device:
130	platform_device_put(m68kspkr_platform_device);
131 err_unregister_driver:
132	platform_driver_unregister(&m68kspkr_platform_driver);
133
134	return err;
135}
136
137static void __exit m68kspkr_exit(void)
138{
139	platform_device_unregister(m68kspkr_platform_device);
140	platform_driver_unregister(&m68kspkr_platform_driver);
141}
142
143module_init(m68kspkr_init);
144module_exit(m68kspkr_exit);
145