2 * PC Speaker beeper driver for Linux
4 * Copyright (c) 2002 Vojtech Pavlik
5 * Copyright (c) 1992 Orest Zborowski
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>
23 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
24 MODULE_DESCRIPTION("PC Speaker beeper driver");
25 MODULE_LICENSE("GPL");
28 /* Use the global PIT lock ! */
29 #include <asm/i8253.h>
31 static DEFINE_SPINLOCK(i8253_lock);
34 static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
36 unsigned int count = 0;
43 case SND_BELL: if (value) value = 1000;
48 if (value > 20 && value < 32767)
49 count = PIT_TICK_RATE / value;
51 spin_lock_irqsave(&i8253_lock, flags);
54 /* enable counter 2 */
55 outb_p(inb_p(0x61) | 3, 0x61);
56 /* set command for counter 2, 2 byte write */
58 /* select desired HZ */
59 outb_p(count & 0xff, 0x42);
60 outb((count >> 8) & 0xff, 0x42);
62 /* disable counter 2 */
63 outb(inb_p(0x61) & 0xFC, 0x61);
66 spin_unlock_irqrestore(&i8253_lock, flags);
71 static int __devinit pcspkr_probe(struct platform_device *dev)
73 struct input_dev *pcspkr_dev;
76 pcspkr_dev = input_allocate_device();
80 pcspkr_dev->name = "PC Speaker";
81 pcspkr_dev->phys = "isa0061/input0";
82 pcspkr_dev->id.bustype = BUS_ISA;
83 pcspkr_dev->id.vendor = 0x001f;
84 pcspkr_dev->id.product = 0x0001;
85 pcspkr_dev->id.version = 0x0100;
86 pcspkr_dev->dev.parent = &dev->dev;
88 pcspkr_dev->evbit[0] = BIT(EV_SND);
89 pcspkr_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
90 pcspkr_dev->event = pcspkr_event;
92 err = input_register_device(pcspkr_dev);
94 input_free_device(pcspkr_dev);
98 platform_set_drvdata(dev, pcspkr_dev);
103 static int __devexit pcspkr_remove(struct platform_device *dev)
105 struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
107 input_unregister_device(pcspkr_dev);
108 platform_set_drvdata(dev, NULL);
109 /* turn off the speaker */
110 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
115 static int pcspkr_suspend(struct platform_device *dev, pm_message_t state)
117 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
122 static void pcspkr_shutdown(struct platform_device *dev)
124 /* turn off the speaker */
125 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
128 static struct platform_driver pcspkr_platform_driver = {
131 .owner = THIS_MODULE,
133 .probe = pcspkr_probe,
134 .remove = __devexit_p(pcspkr_remove),
135 .suspend = pcspkr_suspend,
136 .shutdown = pcspkr_shutdown,
140 static int __init pcspkr_init(void)
142 return platform_driver_register(&pcspkr_platform_driver);
145 static void __exit pcspkr_exit(void)
147 platform_driver_unregister(&pcspkr_platform_driver);
150 module_init(pcspkr_init);
151 module_exit(pcspkr_exit);