1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 *  PC Speaker beeper driver for Linux
  4 *
  5 *  Copyright (c) 2002 Vojtech Pavlik
  6 *  Copyright (c) 1992 Orest Zborowski
  7 */
  8
  9
 10#include <linux/init.h>
 11#include <linux/input.h>
 12#include <linux/io.h>
 13#include "pcsp.h"
 14#include "pcsp_input.h"
 15
 16static void pcspkr_do_sound(unsigned int count)
 17{
 18	unsigned long flags;
 19
 20	raw_spin_lock_irqsave(&i8253_lock, flags);
 21
 22	if (count) {
 23		/* set command for counter 2, 2 byte write */
 24		outb_p(0xB6, 0x43);
 25		/* select desired HZ */
 26		outb_p(count & 0xff, 0x42);
 27		outb((count >> 8) & 0xff, 0x42);
 28		/* enable counter 2 */
 29		outb_p(inb_p(0x61) | 3, 0x61);
 30	} else {
 31		/* disable counter 2 */
 32		outb(inb_p(0x61) & 0xFC, 0x61);
 33	}
 34
 35	raw_spin_unlock_irqrestore(&i8253_lock, flags);
 36}
 37
 38void pcspkr_stop_sound(void)
 39{
 40	pcspkr_do_sound(0);
 41}
 42
 43static int pcspkr_input_event(struct input_dev *dev, unsigned int type,
 44			      unsigned int code, int value)
 45{
 46	unsigned int count = 0;
 47
 48	if (atomic_read(&pcsp_chip.timer_active) || !pcsp_chip.pcspkr)
 49		return 0;
 50
 51	switch (type) {
 52	case EV_SND:
 53		switch (code) {
 54		case SND_BELL:
 55			if (value)
 56				value = 1000;
 57			break;
 58		case SND_TONE:
 59			break;
 60		default:
 61			return -1;
 62		}
 63		break;
 64
 65	default:
 66		return -1;
 67	}
 68
 69	if (value > 20 && value < 32767)
 70		count = PIT_TICK_RATE / value;
 71
 72	pcspkr_do_sound(count);
 73
 74	return 0;
 75}
 76
 77int pcspkr_input_init(struct input_dev **rdev, struct device *dev)
 78{
 79	int err;
 80
 81	struct input_dev *input_dev = devm_input_allocate_device(dev);
 82	if (!input_dev)
 83		return -ENOMEM;
 84
 85	input_dev->name = "PC Speaker";
 86	input_dev->phys = "isa0061/input0";
 87	input_dev->id.bustype = BUS_ISA;
 88	input_dev->id.vendor = 0x001f;
 89	input_dev->id.product = 0x0001;
 90	input_dev->id.version = 0x0100;
 91	input_dev->dev.parent = dev;
 92
 93	input_dev->evbit[0] = BIT(EV_SND);
 94	input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
 95	input_dev->event = pcspkr_input_event;
 96
 97	err = input_register_device(input_dev);
 98	if (err)
 
 99		return err;
 
100
101	*rdev = input_dev;
 
 
 
 
 
 
 
 
102	return 0;
103}

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 *  PC Speaker beeper driver for Linux
  4 *
  5 *  Copyright (c) 2002 Vojtech Pavlik
  6 *  Copyright (c) 1992 Orest Zborowski
  7 */
  8
  9
 10#include <linux/init.h>
 11#include <linux/input.h>
 12#include <linux/io.h>
 13#include "pcsp.h"
 14#include "pcsp_input.h"
 15
 16static void pcspkr_do_sound(unsigned int count)
 17{
 18	unsigned long flags;
 19
 20	raw_spin_lock_irqsave(&i8253_lock, flags);
 21
 22	if (count) {
 23		/* set command for counter 2, 2 byte write */
 24		outb_p(0xB6, 0x43);
 25		/* select desired HZ */
 26		outb_p(count & 0xff, 0x42);
 27		outb((count >> 8) & 0xff, 0x42);
 28		/* enable counter 2 */
 29		outb_p(inb_p(0x61) | 3, 0x61);
 30	} else {
 31		/* disable counter 2 */
 32		outb(inb_p(0x61) & 0xFC, 0x61);
 33	}
 34
 35	raw_spin_unlock_irqrestore(&i8253_lock, flags);
 36}
 37
 38void pcspkr_stop_sound(void)
 39{
 40	pcspkr_do_sound(0);
 41}
 42
 43static int pcspkr_input_event(struct input_dev *dev, unsigned int type,
 44			      unsigned int code, int value)
 45{
 46	unsigned int count = 0;
 47
 48	if (atomic_read(&pcsp_chip.timer_active) || !pcsp_chip.pcspkr)
 49		return 0;
 50
 51	switch (type) {
 52	case EV_SND:
 53		switch (code) {
 54		case SND_BELL:
 55			if (value)
 56				value = 1000;
 
 57		case SND_TONE:
 58			break;
 59		default:
 60			return -1;
 61		}
 62		break;
 63
 64	default:
 65		return -1;
 66	}
 67
 68	if (value > 20 && value < 32767)
 69		count = PIT_TICK_RATE / value;
 70
 71	pcspkr_do_sound(count);
 72
 73	return 0;
 74}
 75
 76int pcspkr_input_init(struct input_dev **rdev, struct device *dev)
 77{
 78	int err;
 79
 80	struct input_dev *input_dev = input_allocate_device();
 81	if (!input_dev)
 82		return -ENOMEM;
 83
 84	input_dev->name = "PC Speaker";
 85	input_dev->phys = "isa0061/input0";
 86	input_dev->id.bustype = BUS_ISA;
 87	input_dev->id.vendor = 0x001f;
 88	input_dev->id.product = 0x0001;
 89	input_dev->id.version = 0x0100;
 90	input_dev->dev.parent = dev;
 91
 92	input_dev->evbit[0] = BIT(EV_SND);
 93	input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
 94	input_dev->event = pcspkr_input_event;
 95
 96	err = input_register_device(input_dev);
 97	if (err) {
 98		input_free_device(input_dev);
 99		return err;
100	}
101
102	*rdev = input_dev;
103	return 0;
104}
105
106int pcspkr_input_remove(struct input_dev *dev)
107{
108	pcspkr_stop_sound();
109	input_unregister_device(dev);	/* this also does kfree() */
110
111	return 0;
112}