[linux-block.git] / drivers / input / misc / pcspkr.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/kernel.h>
#include <linux/module.h>
#include <linux/i8253.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/timex.h>
#include <linux/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 -EINVAL;

	switch (code) {
	case SND_BELL:
		if (value)
			value = 1000;
		break;
	case SND_TONE:
		break;
	default:
		return -EINVAL;
	}

	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 void pcspkr_remove(struct platform_device *dev)
{
	struct input_dev *pcspkr_dev = platform_get_drvdata(dev);

	input_unregister_device(pcspkr_dev);
	/* turn off the speaker */
	pcspkr_event(NULL, EV_SND, SND_BELL, 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",
		.pm	= &pcspkr_pm_ops,
	},
	.probe		= pcspkr_probe,
	.remove		= pcspkr_remove,
	.shutdown	= pcspkr_shutdown,
};
module_platform_driver(pcspkr_platform_driver);
Commit	Line	Data
	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/kernel.h>
	11	#include <linux/module.h>
	12	#include <linux/i8253.h>
	13	#include <linux/input.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/timex.h>
	16	#include <linux/io.h>
	17
	18	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	19	MODULE_DESCRIPTION("PC Speaker beeper driver");
	20	MODULE_LICENSE("GPL");
	21	MODULE_ALIAS("platform:pcspkr");
	22
	23	static int pcspkr_event(struct input_dev *dev, unsigned int type,
	24	unsigned int code, int value)
	25	{
	26	unsigned int count = 0;
	27	unsigned long flags;
	28
	29	if (type != EV_SND)
	30	return -EINVAL;
	31
	32	switch (code) {
	33	case SND_BELL:
	34	if (value)
	35	value = 1000;
	36	break;
	37	case SND_TONE:
	38	break;
	39	default:
	40	return -EINVAL;
	41	}
	42
	43	if (value > 20 && value < 32767)
	44	count = PIT_TICK_RATE / value;
	45
	46	raw_spin_lock_irqsave(&i8253_lock, flags);
	47
	48	if (count) {
	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);
	54	/* enable counter 2 */
	55	outb_p(inb_p(0x61) \| 3, 0x61);
	56	} else {
	57	/* disable counter 2 */
	58	outb(inb_p(0x61) & 0xFC, 0x61);
	59	}
	60
	61	raw_spin_unlock_irqrestore(&i8253_lock, flags);
	62
	63	return 0;
	64	}
	65
	66	static int pcspkr_probe(struct platform_device *dev)
	67	{
	68	struct input_dev *pcspkr_dev;
	69	int err;
	70
	71	pcspkr_dev = input_allocate_device();
	72	if (!pcspkr_dev)
	73	return -ENOMEM;
	74
	75	pcspkr_dev->name = "PC Speaker";
	76	pcspkr_dev->phys = "isa0061/input0";
	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;
	81	pcspkr_dev->dev.parent = &dev->dev;
	82
	83	pcspkr_dev->evbit[0] = BIT_MASK(EV_SND);
	84	pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) \| BIT_MASK(SND_TONE);
	85	pcspkr_dev->event = pcspkr_event;
	86
	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);
	94
	95	return 0;
	96	}
	97
	98	static void pcspkr_remove(struct platform_device *dev)
	99	{
	100	struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
	101
	102	input_unregister_device(pcspkr_dev);
	103	/* turn off the speaker */
	104	pcspkr_event(NULL, EV_SND, SND_BELL, 0);
	105	}
	106
	107	static int pcspkr_suspend(struct device *dev)
	108	{
	109	pcspkr_event(NULL, EV_SND, SND_BELL, 0);
	110
	111	return 0;
	112	}
	113
	114	static void pcspkr_shutdown(struct platform_device *dev)
	115	{
	116	/* turn off the speaker */
	117	pcspkr_event(NULL, EV_SND, SND_BELL, 0);
	118	}
	119
	120	static const struct dev_pm_ops pcspkr_pm_ops = {
	121	.suspend = pcspkr_suspend,
	122	};
	123
	124	static struct platform_driver pcspkr_platform_driver = {
	125	.driver = {
	126	.name = "pcspkr",
	127	.pm = &pcspkr_pm_ops,
	128	},
	129	.probe = pcspkr_probe,
	130	.remove = pcspkr_remove,
	131	.shutdown = pcspkr_shutdown,
	132	};
	133	module_platform_driver(pcspkr_platform_driver);
	134