Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * PC Speaker beeper driver for Linux | |
4 | * | |
5 | * Copyright (c) 2002 Vojtech Pavlik | |
6 | * Copyright (c) 1992 Orest Zborowski | |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 LT |
9 | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
16ba9b06 | 12 | #include <linux/i8253.h> |
1da177e4 | 13 | #include <linux/input.h> |
59317747 | 14 | #include <linux/platform_device.h> |
08604bd9 | 15 | #include <linux/timex.h> |
9e04b79c | 16 | #include <linux/io.h> |
1da177e4 LT |
17 | |
18 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
19 | MODULE_DESCRIPTION("PC Speaker beeper driver"); | |
20 | MODULE_LICENSE("GPL"); | |
43cc71ee | 21 | MODULE_ALIAS("platform:pcspkr"); |
1da177e4 | 22 | |
9e04b79c MC |
23 | static int pcspkr_event(struct input_dev *dev, unsigned int type, |
24 | unsigned int code, int value) | |
1da177e4 LT |
25 | { |
26 | unsigned int count = 0; | |
27 | unsigned long flags; | |
28 | ||
29 | if (type != EV_SND) | |
9e04b79c | 30 | return -EINVAL; |
1da177e4 LT |
31 | |
32 | switch (code) { | |
9e04b79c MC |
33 | case SND_BELL: |
34 | if (value) | |
35 | value = 1000; | |
36 | case SND_TONE: | |
37 | break; | |
38 | default: | |
39 | return -EINVAL; | |
1da177e4 LT |
40 | } |
41 | ||
42 | if (value > 20 && value < 32767) | |
43 | count = PIT_TICK_RATE / value; | |
44 | ||
ced918eb | 45 | raw_spin_lock_irqsave(&i8253_lock, flags); |
1da177e4 LT |
46 | |
47 | if (count) { | |
1da177e4 LT |
48 | /* set command for counter 2, 2 byte write */ |
49 | outb_p(0xB6, 0x43); | |
50 | /* select desired HZ */ | |
51 | outb_p(count & 0xff, 0x42); | |
52 | outb((count >> 8) & 0xff, 0x42); | |
59bdb437 ZD |
53 | /* enable counter 2 */ |
54 | outb_p(inb_p(0x61) | 3, 0x61); | |
1da177e4 LT |
55 | } else { |
56 | /* disable counter 2 */ | |
57 | outb(inb_p(0x61) & 0xFC, 0x61); | |
58 | } | |
59 | ||
ced918eb | 60 | raw_spin_unlock_irqrestore(&i8253_lock, flags); |
1da177e4 LT |
61 | |
62 | return 0; | |
63 | } | |
64 | ||
5298cc4c | 65 | static int pcspkr_probe(struct platform_device *dev) |
1da177e4 | 66 | { |
59317747 DT |
67 | struct input_dev *pcspkr_dev; |
68 | int err; | |
69 | ||
76b7cddf DT |
70 | pcspkr_dev = input_allocate_device(); |
71 | if (!pcspkr_dev) | |
72 | return -ENOMEM; | |
1da177e4 | 73 | |
76b7cddf | 74 | pcspkr_dev->name = "PC Speaker"; |
1259f2b3 | 75 | pcspkr_dev->phys = "isa0061/input0"; |
76b7cddf DT |
76 | pcspkr_dev->id.bustype = BUS_ISA; |
77 | pcspkr_dev->id.vendor = 0x001f; | |
78 | pcspkr_dev->id.product = 0x0001; | |
79 | pcspkr_dev->id.version = 0x0100; | |
293e6392 | 80 | pcspkr_dev->dev.parent = &dev->dev; |
1da177e4 | 81 | |
7b19ada2 JS |
82 | pcspkr_dev->evbit[0] = BIT_MASK(EV_SND); |
83 | pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE); | |
76b7cddf | 84 | pcspkr_dev->event = pcspkr_event; |
1da177e4 | 85 | |
59317747 DT |
86 | err = input_register_device(pcspkr_dev); |
87 | if (err) { | |
88 | input_free_device(pcspkr_dev); | |
89 | return err; | |
90 | } | |
91 | ||
92 | platform_set_drvdata(dev, pcspkr_dev); | |
1da177e4 LT |
93 | |
94 | return 0; | |
95 | } | |
96 | ||
e2619cf7 | 97 | static int pcspkr_remove(struct platform_device *dev) |
59317747 DT |
98 | { |
99 | struct input_dev *pcspkr_dev = platform_get_drvdata(dev); | |
100 | ||
101 | input_unregister_device(pcspkr_dev); | |
59317747 DT |
102 | /* turn off the speaker */ |
103 | pcspkr_event(NULL, EV_SND, SND_BELL, 0); | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
35db715b | 108 | static int pcspkr_suspend(struct device *dev) |
59317747 DT |
109 | { |
110 | pcspkr_event(NULL, EV_SND, SND_BELL, 0); | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | static void pcspkr_shutdown(struct platform_device *dev) | |
1da177e4 | 116 | { |
1da177e4 LT |
117 | /* turn off the speaker */ |
118 | pcspkr_event(NULL, EV_SND, SND_BELL, 0); | |
119 | } | |
120 | ||
47145210 | 121 | static const struct dev_pm_ops pcspkr_pm_ops = { |
35db715b FP |
122 | .suspend = pcspkr_suspend, |
123 | }; | |
124 | ||
59317747 DT |
125 | static struct platform_driver pcspkr_platform_driver = { |
126 | .driver = { | |
127 | .name = "pcspkr", | |
35db715b | 128 | .pm = &pcspkr_pm_ops, |
59317747 DT |
129 | }, |
130 | .probe = pcspkr_probe, | |
1cb0aa88 | 131 | .remove = pcspkr_remove, |
59317747 DT |
132 | .shutdown = pcspkr_shutdown, |
133 | }; | |
840a746b | 134 | module_platform_driver(pcspkr_platform_driver); |
59317747 | 135 |