mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-20 17:07:17 +07:00
d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
113 lines
2.1 KiB
C
113 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* PC Speaker beeper driver for Linux
|
|
*
|
|
* Copyright (c) 2002 Vojtech Pavlik
|
|
* Copyright (c) 1992 Orest Zborowski
|
|
*/
|
|
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/input.h>
|
|
#include <linux/io.h>
|
|
#include "pcsp.h"
|
|
#include "pcsp_input.h"
|
|
|
|
static void pcspkr_do_sound(unsigned int count)
|
|
{
|
|
unsigned long flags;
|
|
|
|
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);
|
|
}
|
|
|
|
void pcspkr_stop_sound(void)
|
|
{
|
|
pcspkr_do_sound(0);
|
|
}
|
|
|
|
static int pcspkr_input_event(struct input_dev *dev, unsigned int type,
|
|
unsigned int code, int value)
|
|
{
|
|
unsigned int count = 0;
|
|
|
|
if (atomic_read(&pcsp_chip.timer_active) || !pcsp_chip.pcspkr)
|
|
return 0;
|
|
|
|
switch (type) {
|
|
case EV_SND:
|
|
switch (code) {
|
|
case SND_BELL:
|
|
if (value)
|
|
value = 1000;
|
|
case SND_TONE:
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
if (value > 20 && value < 32767)
|
|
count = PIT_TICK_RATE / value;
|
|
|
|
pcspkr_do_sound(count);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pcspkr_input_init(struct input_dev **rdev, struct device *dev)
|
|
{
|
|
int err;
|
|
|
|
struct input_dev *input_dev = input_allocate_device();
|
|
if (!input_dev)
|
|
return -ENOMEM;
|
|
|
|
input_dev->name = "PC Speaker";
|
|
input_dev->phys = "isa0061/input0";
|
|
input_dev->id.bustype = BUS_ISA;
|
|
input_dev->id.vendor = 0x001f;
|
|
input_dev->id.product = 0x0001;
|
|
input_dev->id.version = 0x0100;
|
|
input_dev->dev.parent = dev;
|
|
|
|
input_dev->evbit[0] = BIT(EV_SND);
|
|
input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
|
|
input_dev->event = pcspkr_input_event;
|
|
|
|
err = input_register_device(input_dev);
|
|
if (err) {
|
|
input_free_device(input_dev);
|
|
return err;
|
|
}
|
|
|
|
*rdev = input_dev;
|
|
return 0;
|
|
}
|
|
|
|
int pcspkr_input_remove(struct input_dev *dev)
|
|
{
|
|
pcspkr_stop_sound();
|
|
input_unregister_device(dev); /* this also does kfree() */
|
|
|
|
return 0;
|
|
}
|