mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 15:13:55 +08:00
ced918eb74
i8253_lock needs to be a real spinlock in preempt-rt, i.e. it can not be converted to a sleeping lock. Convert it to raw_spinlock and fix up all users. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Takashi Iwai <tiwai@suse.de> Cc: Jens Axboe <jens.axboe@oracle.com> LKML-Reference: <20100217163751.030764372@linutronix.de>
158 lines
3.4 KiB
C
158 lines
3.4 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 <linux/timex.h>
|
|
#include <asm/io.h>
|
|
|
|
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
|
|
MODULE_DESCRIPTION("PC Speaker beeper driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:pcspkr");
|
|
|
|
#if defined(CONFIG_MIPS) || defined(CONFIG_X86)
|
|
/* Use the global PIT lock ! */
|
|
#include <asm/i8253.h>
|
|
#else
|
|
#include <asm/8253pit.h>
|
|
static DEFINE_RAW_SPINLOCK(i8253_lock);
|
|
#endif
|
|
|
|
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;
|
|
|
|
raw_spin_lock_irqsave(&i8253_lock, flags);
|
|
|
|
if (count) {
|
|
/* 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);
|
|
/* enable counter 2 */
|
|
outb_p(inb_p(0x61) | 3, 0x61);
|
|
} else {
|
|
/* disable counter 2 */
|
|
outb(inb_p(0x61) & 0xFC, 0x61);
|
|
}
|
|
|
|
raw_spin_unlock_irqrestore(&i8253_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->dev.parent = &dev->dev;
|
|
|
|
pcspkr_dev->evbit[0] = BIT_MASK(EV_SND);
|
|
pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(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 device *dev)
|
|
{
|
|
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 const struct dev_pm_ops pcspkr_pm_ops = {
|
|
.suspend = pcspkr_suspend,
|
|
};
|
|
|
|
static struct platform_driver pcspkr_platform_driver = {
|
|
.driver = {
|
|
.name = "pcspkr",
|
|
.owner = THIS_MODULE,
|
|
.pm = &pcspkr_pm_ops,
|
|
},
|
|
.probe = pcspkr_probe,
|
|
.remove = __devexit_p(pcspkr_remove),
|
|
.shutdown = pcspkr_shutdown,
|
|
};
|
|
|
|
|
|
static int __init pcspkr_init(void)
|
|
{
|
|
return platform_driver_register(&pcspkr_platform_driver);
|
|
}
|
|
|
|
static void __exit pcspkr_exit(void)
|
|
{
|
|
platform_driver_unregister(&pcspkr_platform_driver);
|
|
}
|
|
|
|
module_init(pcspkr_init);
|
|
module_exit(pcspkr_exit);
|