Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar...
[linux-2.6-microblaze.git] / drivers / input / misc / m68kspkr.c
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
19 MODULE_AUTHOR("Richard Zidlicky <rz@linux-m68k.org>");
20 MODULE_DESCRIPTION("m68k beeper driver");
21 MODULE_LICENSE("GPL");
22
23 static struct platform_device *m68kspkr_platform_device;
24
25 static 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
46 static 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
78 static 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
89 static void m68kspkr_shutdown(struct platform_device *dev)
90 {
91         /* turn off the speaker */
92         m68kspkr_event(NULL, EV_SND, SND_BELL, 0);
93 }
94
95 static 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
104 static 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
137 static void __exit m68kspkr_exit(void)
138 {
139         platform_device_unregister(m68kspkr_platform_device);
140         platform_driver_unregister(&m68kspkr_platform_driver);
141 }
142
143 module_init(m68kspkr_init);
144 module_exit(m68kspkr_exit);