171 lines
3.7 KiB
C
171 lines
3.7 KiB
C
/*
|
|
* PC Speaker beeper driver for Linux
|
|
*
|
|
* Copyright (c) 2002 Vojtech Pavlik
|
|
* Copyright (c) 1992 Orest Zborowski
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/input.h>
|
|
#include <linux/platform_device.h>
|
|
#include <asm/8253pit.h>
|
|
#include <asm/io.h>
|
|
|
|
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
|
|
MODULE_DESCRIPTION("PC Speaker beeper driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static struct platform_device *pcspkr_platform_device;
|
|
static DEFINE_SPINLOCK(i8253_beep_lock);
|
|
|
|
static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
|
|
{
|
|
unsigned int count = 0;
|
|
unsigned long flags;
|
|
|
|
if (type != EV_SND)
|
|
return -1;
|
|
|
|
switch (code) {
|
|
case SND_BELL: if (value) value = 1000;
|
|
case SND_TONE: break;
|
|
default: return -1;
|
|
}
|
|
|
|
if (value > 20 && value < 32767)
|
|
count = PIT_TICK_RATE / value;
|
|
|
|
spin_lock_irqsave(&i8253_beep_lock, flags);
|
|
|
|
if (count) {
|
|
/* enable counter 2 */
|
|
outb_p(inb_p(0x61) | 3, 0x61);
|
|
/* set command for counter 2, 2 byte write */
|
|
outb_p(0xB6, 0x43);
|
|
/* select desired HZ */
|
|
outb_p(count & 0xff, 0x42);
|
|
outb((count >> 8) & 0xff, 0x42);
|
|
} else {
|
|
/* disable counter 2 */
|
|
outb(inb_p(0x61) & 0xFC, 0x61);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&i8253_beep_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit pcspkr_probe(struct platform_device *dev)
|
|
{
|
|
struct input_dev *pcspkr_dev;
|
|
int err;
|
|
|
|
pcspkr_dev = input_allocate_device();
|
|
if (!pcspkr_dev)
|
|
return -ENOMEM;
|
|
|
|
pcspkr_dev->name = "PC Speaker";
|
|
pcspkr_dev->phys = "isa0061/input0";
|
|
pcspkr_dev->id.bustype = BUS_ISA;
|
|
pcspkr_dev->id.vendor = 0x001f;
|
|
pcspkr_dev->id.product = 0x0001;
|
|
pcspkr_dev->id.version = 0x0100;
|
|
pcspkr_dev->cdev.dev = &dev->dev;
|
|
|
|
pcspkr_dev->evbit[0] = BIT(EV_SND);
|
|
pcspkr_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
|
|
pcspkr_dev->event = pcspkr_event;
|
|
|
|
err = input_register_device(pcspkr_dev);
|
|
if (err) {
|
|
input_free_device(pcspkr_dev);
|
|
return err;
|
|
}
|
|
|
|
platform_set_drvdata(dev, pcspkr_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit pcspkr_remove(struct platform_device *dev)
|
|
{
|
|
struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
|
|
|
|
input_unregister_device(pcspkr_dev);
|
|
platform_set_drvdata(dev, NULL);
|
|
/* turn off the speaker */
|
|
pcspkr_event(NULL, EV_SND, SND_BELL, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pcspkr_suspend(struct platform_device *dev, pm_message_t state)
|
|
{
|
|
pcspkr_event(NULL, EV_SND, SND_BELL, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pcspkr_shutdown(struct platform_device *dev)
|
|
{
|
|
/* turn off the speaker */
|
|
pcspkr_event(NULL, EV_SND, SND_BELL, 0);
|
|
}
|
|
|
|
static struct platform_driver pcspkr_platform_driver = {
|
|
.driver = {
|
|
.name = "pcspkr",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = pcspkr_probe,
|
|
.remove = __devexit_p(pcspkr_remove),
|
|
.suspend = pcspkr_suspend,
|
|
.shutdown = pcspkr_shutdown,
|
|
};
|
|
|
|
|
|
static int __init pcspkr_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = platform_driver_register(&pcspkr_platform_driver);
|
|
if (err)
|
|
return err;
|
|
|
|
pcspkr_platform_device = platform_device_alloc("pcspkr", -1);
|
|
if (!pcspkr_platform_device) {
|
|
err = -ENOMEM;
|
|
goto err_unregister_driver;
|
|
}
|
|
|
|
err = platform_device_add(pcspkr_platform_device);
|
|
if (err)
|
|
goto err_free_device;
|
|
|
|
return 0;
|
|
|
|
err_free_device:
|
|
platform_device_put(pcspkr_platform_device);
|
|
err_unregister_driver:
|
|
platform_driver_unregister(&pcspkr_platform_driver);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit pcspkr_exit(void)
|
|
{
|
|
platform_device_unregister(pcspkr_platform_device);
|
|
platform_driver_unregister(&pcspkr_platform_driver);
|
|
}
|
|
|
|
module_init(pcspkr_init);
|
|
module_exit(pcspkr_exit);
|