platform: prefix MODALIAS with "platform:"
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / input / misc / pcspkr.c
blobe1a44020ed2b456292685e13b14253fd56f734a0
1 /*
2 * PC Speaker beeper driver for Linux
4 * Copyright (c) 2002 Vojtech Pavlik
5 * Copyright (c) 1992 Orest Zborowski
7 */
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
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/input.h>
19 #include <linux/platform_device.h>
20 #include <asm/8253pit.h>
21 #include <asm/io.h>
23 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
24 MODULE_DESCRIPTION("PC Speaker beeper driver");
25 MODULE_LICENSE("GPL");
26 MODULE_ALIAS("platform:pcspkr");
28 #ifdef CONFIG_X86
29 /* Use the global PIT lock ! */
30 #include <asm/i8253.h>
31 #else
32 static DEFINE_SPINLOCK(i8253_lock);
33 #endif
35 static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
37 unsigned int count = 0;
38 unsigned long flags;
40 if (type != EV_SND)
41 return -1;
43 switch (code) {
44 case SND_BELL: if (value) value = 1000;
45 case SND_TONE: break;
46 default: return -1;
49 if (value > 20 && value < 32767)
50 count = PIT_TICK_RATE / value;
52 spin_lock_irqsave(&i8253_lock, flags);
54 if (count) {
55 /* enable counter 2 */
56 outb_p(inb_p(0x61) | 3, 0x61);
57 /* set command for counter 2, 2 byte write */
58 outb_p(0xB6, 0x43);
59 /* select desired HZ */
60 outb_p(count & 0xff, 0x42);
61 outb((count >> 8) & 0xff, 0x42);
62 } else {
63 /* disable counter 2 */
64 outb(inb_p(0x61) & 0xFC, 0x61);
67 spin_unlock_irqrestore(&i8253_lock, flags);
69 return 0;
72 static int __devinit pcspkr_probe(struct platform_device *dev)
74 struct input_dev *pcspkr_dev;
75 int err;
77 pcspkr_dev = input_allocate_device();
78 if (!pcspkr_dev)
79 return -ENOMEM;
81 pcspkr_dev->name = "PC Speaker";
82 pcspkr_dev->phys = "isa0061/input0";
83 pcspkr_dev->id.bustype = BUS_ISA;
84 pcspkr_dev->id.vendor = 0x001f;
85 pcspkr_dev->id.product = 0x0001;
86 pcspkr_dev->id.version = 0x0100;
87 pcspkr_dev->dev.parent = &dev->dev;
89 pcspkr_dev->evbit[0] = BIT(EV_SND);
90 pcspkr_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
91 pcspkr_dev->event = pcspkr_event;
93 err = input_register_device(pcspkr_dev);
94 if (err) {
95 input_free_device(pcspkr_dev);
96 return err;
99 platform_set_drvdata(dev, pcspkr_dev);
101 return 0;
104 static int __devexit pcspkr_remove(struct platform_device *dev)
106 struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
108 input_unregister_device(pcspkr_dev);
109 platform_set_drvdata(dev, NULL);
110 /* turn off the speaker */
111 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
113 return 0;
116 static int pcspkr_suspend(struct platform_device *dev, pm_message_t state)
118 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
120 return 0;
123 static void pcspkr_shutdown(struct platform_device *dev)
125 /* turn off the speaker */
126 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
129 static struct platform_driver pcspkr_platform_driver = {
130 .driver = {
131 .name = "pcspkr",
132 .owner = THIS_MODULE,
134 .probe = pcspkr_probe,
135 .remove = __devexit_p(pcspkr_remove),
136 .suspend = pcspkr_suspend,
137 .shutdown = pcspkr_shutdown,
141 static int __init pcspkr_init(void)
143 return platform_driver_register(&pcspkr_platform_driver);
146 static void __exit pcspkr_exit(void)
148 platform_driver_unregister(&pcspkr_platform_driver);
151 module_init(pcspkr_init);
152 module_exit(pcspkr_exit);