[mirror_ubuntu-jammy-kernel.git] / drivers / input / misc / pcspkr.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/i8253.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");

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 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 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		= pcspkr_remove,
	.shutdown	= pcspkr_shutdown,
};
module_platform_driver(pcspkr_platform_driver);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* PC Speaker beeper driver for Linux
	3	*
	4	* Copyright (c) 2002 Vojtech Pavlik
	5	* Copyright (c) 1992 Orest Zborowski
	6	*
	7	*/
	8
	9	/*
	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
	13	*/
	14
	15	#include <linux/kernel.h>
	16	#include <linux/module.h>
16ba9b06	17	#include <linux/i8253.h>
1da177e4 LT	18	#include <linux/init.h>
1da177e4 LT	19	#include <linux/input.h>
59317747	20	#include <linux/platform_device.h>
08604bd9	21	#include <linux/timex.h>
1da177e4 LT	22	#include <asm/io.h>
	23
	24	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	25	MODULE_DESCRIPTION("PC Speaker beeper driver");
	26	MODULE_LICENSE("GPL");
43cc71ee	27	MODULE_ALIAS("platform:pcspkr");
1da177e4	28
1da177e4 LT	29	static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
	30	{
	31	unsigned int count = 0;
	32	unsigned long flags;
	33
	34	if (type != EV_SND)
	35	return -1;
	36
	37	switch (code) {
	38	case SND_BELL: if (value) value = 1000;
	39	case SND_TONE: break;
	40	default: return -1;
	41	}
	42
	43	if (value > 20 && value < 32767)
	44	count = PIT_TICK_RATE / value;
	45
ced918eb	46	raw_spin_lock_irqsave(&i8253_lock, flags);
1da177e4 LT	47
1da177e4 LT	48	if (count) {
1da177e4 LT	49	/* set command for counter 2, 2 byte write */
	50	outb_p(0xB6, 0x43);
	51	/* select desired HZ */
	52	outb_p(count & 0xff, 0x42);
	53	outb((count >> 8) & 0xff, 0x42);
59bdb437 ZD	54	/* enable counter 2 */
59bdb437 ZD	55	outb_p(inb_p(0x61) \| 3, 0x61);
1da177e4 LT	56	} else {
	57	/* disable counter 2 */
	58	outb(inb_p(0x61) & 0xFC, 0x61);
	59	}
	60
ced918eb	61	raw_spin_unlock_irqrestore(&i8253_lock, flags);
1da177e4 LT	62
	63	return 0;
	64	}
	65
5298cc4c	66	static int pcspkr_probe(struct platform_device *dev)
1da177e4	67	{
59317747 DT	68	struct input_dev *pcspkr_dev;
	69	int err;
	70
76b7cddf DT	71	pcspkr_dev = input_allocate_device();
	72	if (!pcspkr_dev)
	73	return -ENOMEM;
1da177e4	74
76b7cddf	75	pcspkr_dev->name = "PC Speaker";
1259f2b3	76	pcspkr_dev->phys = "isa0061/input0";
76b7cddf DT	77	pcspkr_dev->id.bustype = BUS_ISA;
	78	pcspkr_dev->id.vendor = 0x001f;
	79	pcspkr_dev->id.product = 0x0001;
	80	pcspkr_dev->id.version = 0x0100;
293e6392	81	pcspkr_dev->dev.parent = &dev->dev;
1da177e4	82
7b19ada2 JS	83	pcspkr_dev->evbit[0] = BIT_MASK(EV_SND);
7b19ada2 JS	84	pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) \| BIT_MASK(SND_TONE);
76b7cddf	85	pcspkr_dev->event = pcspkr_event;
1da177e4	86
59317747 DT	87	err = input_register_device(pcspkr_dev);
	88	if (err) {
	89	input_free_device(pcspkr_dev);
	90	return err;
	91	}
	92
	93	platform_set_drvdata(dev, pcspkr_dev);
1da177e4 LT	94
	95	return 0;
	96	}
	97
e2619cf7	98	static int pcspkr_remove(struct platform_device *dev)
59317747 DT	99	{
	100	struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
	101
	102	input_unregister_device(pcspkr_dev);
	103	platform_set_drvdata(dev, NULL);
	104	/* turn off the speaker */
	105	pcspkr_event(NULL, EV_SND, SND_BELL, 0);
	106
	107	return 0;
	108	}
	109
35db715b	110	static int pcspkr_suspend(struct device *dev)
59317747 DT	111	{
	112	pcspkr_event(NULL, EV_SND, SND_BELL, 0);
	113
	114	return 0;
	115	}
	116
	117	static void pcspkr_shutdown(struct platform_device *dev)
1da177e4	118	{
1da177e4 LT	119	/* turn off the speaker */
	120	pcspkr_event(NULL, EV_SND, SND_BELL, 0);
	121	}
	122
47145210	123	static const struct dev_pm_ops pcspkr_pm_ops = {
35db715b FP	124	.suspend = pcspkr_suspend,
	125	};
	126
59317747 DT	127	static struct platform_driver pcspkr_platform_driver = {
	128	.driver = {
	129	.name = "pcspkr",
	130	.owner = THIS_MODULE,
35db715b	131	.pm = &pcspkr_pm_ops,
59317747 DT	132	},
59317747 DT	133	.probe = pcspkr_probe,
1cb0aa88	134	.remove = pcspkr_remove,
59317747 DT	135	.shutdown = pcspkr_shutdown,
59317747 DT	136	};
840a746b	137	module_platform_driver(pcspkr_platform_driver);
59317747	138