Commit | Line | Data |
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9ab4d072 SS |
1 | /* |
2 | * PC Speaker beeper driver for Linux | |
3 | * | |
4 | * Copyright (c) 2002 Vojtech Pavlik | |
5 | * Copyright (c) 1992 Orest Zborowski | |
6 | * | |
7 | */ | |
8 | ||
9 | /* | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License version 2 as published by | |
12 | * the Free Software Foundation | |
13 | */ | |
14 | ||
15 | #include <linux/init.h> | |
16 | #include <linux/input.h> | |
6cbbfe1c | 17 | #include <linux/io.h> |
9ab4d072 | 18 | #include "pcsp.h" |
01b1dccb | 19 | #include "pcsp_input.h" |
9ab4d072 SS |
20 | |
21 | static void pcspkr_do_sound(unsigned int count) | |
22 | { | |
23 | unsigned long flags; | |
24 | ||
ced918eb | 25 | raw_spin_lock_irqsave(&i8253_lock, flags); |
9ab4d072 SS |
26 | |
27 | if (count) { | |
9ab4d072 SS |
28 | /* set command for counter 2, 2 byte write */ |
29 | outb_p(0xB6, 0x43); | |
30 | /* select desired HZ */ | |
31 | outb_p(count & 0xff, 0x42); | |
32 | outb((count >> 8) & 0xff, 0x42); | |
b02555c3 ZD |
33 | /* enable counter 2 */ |
34 | outb_p(inb_p(0x61) | 3, 0x61); | |
9ab4d072 SS |
35 | } else { |
36 | /* disable counter 2 */ | |
37 | outb(inb_p(0x61) & 0xFC, 0x61); | |
38 | } | |
39 | ||
ced918eb | 40 | raw_spin_unlock_irqrestore(&i8253_lock, flags); |
9ab4d072 SS |
41 | } |
42 | ||
43 | void pcspkr_stop_sound(void) | |
44 | { | |
45 | pcspkr_do_sound(0); | |
46 | } | |
47 | ||
48 | static int pcspkr_input_event(struct input_dev *dev, unsigned int type, | |
49 | unsigned int code, int value) | |
50 | { | |
51 | unsigned int count = 0; | |
52 | ||
53 | if (atomic_read(&pcsp_chip.timer_active) || !pcsp_chip.pcspkr) | |
54 | return 0; | |
55 | ||
56 | switch (type) { | |
57 | case EV_SND: | |
58 | switch (code) { | |
59 | case SND_BELL: | |
60 | if (value) | |
61 | value = 1000; | |
62 | case SND_TONE: | |
63 | break; | |
64 | default: | |
65 | return -1; | |
66 | } | |
67 | break; | |
68 | ||
69 | default: | |
70 | return -1; | |
71 | } | |
72 | ||
73 | if (value > 20 && value < 32767) | |
74 | count = PIT_TICK_RATE / value; | |
75 | ||
76 | pcspkr_do_sound(count); | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
fbbb01a1 | 81 | int pcspkr_input_init(struct input_dev **rdev, struct device *dev) |
9ab4d072 SS |
82 | { |
83 | int err; | |
84 | ||
85 | struct input_dev *input_dev = input_allocate_device(); | |
86 | if (!input_dev) | |
87 | return -ENOMEM; | |
88 | ||
89 | input_dev->name = "PC Speaker"; | |
90 | input_dev->phys = "isa0061/input0"; | |
91 | input_dev->id.bustype = BUS_ISA; | |
92 | input_dev->id.vendor = 0x001f; | |
93 | input_dev->id.product = 0x0001; | |
94 | input_dev->id.version = 0x0100; | |
95 | input_dev->dev.parent = dev; | |
96 | ||
97 | input_dev->evbit[0] = BIT(EV_SND); | |
98 | input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE); | |
99 | input_dev->event = pcspkr_input_event; | |
100 | ||
101 | err = input_register_device(input_dev); | |
102 | if (err) { | |
103 | input_free_device(input_dev); | |
104 | return err; | |
105 | } | |
106 | ||
107 | *rdev = input_dev; | |
108 | return 0; | |
109 | } | |
110 | ||
111 | int pcspkr_input_remove(struct input_dev *dev) | |
112 | { | |
113 | pcspkr_stop_sound(); | |
114 | input_unregister_device(dev); /* this also does kfree() */ | |
115 | ||
116 | return 0; | |
117 | } |