[deliverable/linux.git] / drivers / input / misc / ixp4xx-beeper.c

/*
 * Generic IXP4xx beeper driver
 *
 * Copyright (C) 2005 Tower Technologies
 *
 * based on nslu2-io.c
 *  Copyright (C) 2004 Karen Spearel
 *
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 * Maintainers: http://www.nslu2-linux.org/
 *
 * 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/module.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <mach/hardware.h>

MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
MODULE_DESCRIPTION("ixp4xx beeper driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:ixp4xx-beeper");

static DEFINE_SPINLOCK(beep_lock);

static void ixp4xx_spkr_control(unsigned int pin, unsigned int count)
{
	unsigned long flags;

	spin_lock_irqsave(&beep_lock, flags);

	 if (count) {
		gpio_line_config(pin, IXP4XX_GPIO_OUT);
		gpio_line_set(pin, IXP4XX_GPIO_LOW);

		*IXP4XX_OSRT2 = (count & ~IXP4XX_OST_RELOAD_MASK) | IXP4XX_OST_ENABLE;
	} else {
		gpio_line_config(pin, IXP4XX_GPIO_IN);
		gpio_line_set(pin, IXP4XX_GPIO_HIGH);

		*IXP4XX_OSRT2 = 0;
	}

	spin_unlock_irqrestore(&beep_lock, flags);
}

static int ixp4xx_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
	unsigned int pin = (unsigned int) input_get_drvdata(dev);
	unsigned int count = 0;

	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)
#ifndef FREQ
		count = (ixp4xx_get_board_tick_rate() / (value * 4)) - 1;
#else
		count = (FREQ / (value * 4)) - 1;
#endif

	ixp4xx_spkr_control(pin, count);

	return 0;
}

static irqreturn_t ixp4xx_spkr_interrupt(int irq, void *dev_id)
{
	/* clear interrupt */
	*IXP4XX_OSST = IXP4XX_OSST_TIMER_2_PEND;

	/* flip the beeper output */
	*IXP4XX_GPIO_GPOUTR ^= (1 << (unsigned int) dev_id);

	return IRQ_HANDLED;
}

static int __devinit ixp4xx_spkr_probe(struct platform_device *dev)
{
	struct input_dev *input_dev;
	int err;

	input_dev = input_allocate_device();
	if (!input_dev)
		return -ENOMEM;

	input_set_drvdata(input_dev, (void *) dev->id);

	input_dev->name = "ixp4xx beeper",
	input_dev->phys = "ixp4xx/gpio";
	input_dev->id.bustype = BUS_HOST;
	input_dev->id.vendor  = 0x001f;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0100;
	input_dev->dev.parent = &dev->dev;

	input_dev->evbit[0] = BIT_MASK(EV_SND);
	input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
	input_dev->event = ixp4xx_spkr_event;

	err = request_irq(IRQ_IXP4XX_TIMER2, &ixp4xx_spkr_interrupt,
			  IRQF_DISABLED | IRQF_TIMER, "ixp4xx-beeper", (void *) dev->id);
	if (err)
		goto err_free_device;

	err = input_register_device(input_dev);
	if (err)
		goto err_free_irq;

	platform_set_drvdata(dev, input_dev);

	return 0;

 err_free_irq:
	free_irq(IRQ_IXP4XX_TIMER2, dev);
 err_free_device:
	input_free_device(input_dev);

	return err;
}

static int __devexit ixp4xx_spkr_remove(struct platform_device *dev)
{
	struct input_dev *input_dev = platform_get_drvdata(dev);
	unsigned int pin = (unsigned int) input_get_drvdata(input_dev);

	input_unregister_device(input_dev);
	platform_set_drvdata(dev, NULL);

	/* turn the speaker off */
	disable_irq(IRQ_IXP4XX_TIMER2);
	ixp4xx_spkr_control(pin, 0);

	free_irq(IRQ_IXP4XX_TIMER2, dev);

	return 0;
}

static void ixp4xx_spkr_shutdown(struct platform_device *dev)
{
	struct input_dev *input_dev = platform_get_drvdata(dev);
	unsigned int pin = (unsigned int) input_get_drvdata(input_dev);

	/* turn off the speaker */
	disable_irq(IRQ_IXP4XX_TIMER2);
	ixp4xx_spkr_control(pin, 0);
}

static struct platform_driver ixp4xx_spkr_platform_driver = {
	.driver		= {
		.name	= "ixp4xx-beeper",
		.owner	= THIS_MODULE,
	},
	.probe		= ixp4xx_spkr_probe,
	.remove		= __devexit_p(ixp4xx_spkr_remove),
	.shutdown	= ixp4xx_spkr_shutdown,
};

static int __init ixp4xx_spkr_init(void)
{
	return platform_driver_register(&ixp4xx_spkr_platform_driver);
}

static void __exit ixp4xx_spkr_exit(void)
{
	platform_driver_unregister(&ixp4xx_spkr_platform_driver);
}

module_init(ixp4xx_spkr_init);
module_exit(ixp4xx_spkr_exit);
Commit	Line	Data
01387959 AZ	1	/*
	2	* Generic IXP4xx beeper driver
	3	*
	4	* Copyright (C) 2005 Tower Technologies
	5	*
	6	* based on nslu2-io.c
	7	* Copyright (C) 2004 Karen Spearel
	8	*
	9	* Author: Alessandro Zummo <a.zummo@towertech.it>
	10	* Maintainers: http://www.nslu2-linux.org/
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License version 2 as
	14	* published by the Free Software Foundation.
	15	*
	16	*/
	17
	18	#include <linux/module.h>
	19	#include <linux/input.h>
	20	#include <linux/delay.h>
	21	#include <linux/platform_device.h>
a09d31ff	22	#include <linux/interrupt.h>
a09e64fb	23	#include <mach/hardware.h>
01387959 AZ	24
	25	MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
	26	MODULE_DESCRIPTION("ixp4xx beeper driver");
	27	MODULE_LICENSE("GPL");
589499c0	28	MODULE_ALIAS("platform:ixp4xx-beeper");
01387959 AZ	29
	30	static DEFINE_SPINLOCK(beep_lock);
	31
	32	static void ixp4xx_spkr_control(unsigned int pin, unsigned int count)
	33	{
	34	unsigned long flags;
	35
	36	spin_lock_irqsave(&beep_lock, flags);
	37
	38	if (count) {
	39	gpio_line_config(pin, IXP4XX_GPIO_OUT);
	40	gpio_line_set(pin, IXP4XX_GPIO_LOW);
	41
	42	*IXP4XX_OSRT2 = (count & ~IXP4XX_OST_RELOAD_MASK) \| IXP4XX_OST_ENABLE;
	43	} else {
	44	gpio_line_config(pin, IXP4XX_GPIO_IN);
	45	gpio_line_set(pin, IXP4XX_GPIO_HIGH);
	46
	47	*IXP4XX_OSRT2 = 0;
	48	}
	49
	50	spin_unlock_irqrestore(&beep_lock, flags);
	51	}
	52
	53	static int ixp4xx_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
	54	{
643bd272	55	unsigned int pin = (unsigned int) input_get_drvdata(dev);
01387959 AZ	56	unsigned int count = 0;
	57
	58	if (type != EV_SND)
	59	return -1;
	60
	61	switch (code) {
	62	case SND_BELL:
	63	if (value)
	64	value = 1000;
	65	case SND_TONE:
	66	break;
	67	default:
	68	return -1;
	69	}
	70
	71	if (value > 20 && value < 32767)
	72	#ifndef FREQ
	73	count = (ixp4xx_get_board_tick_rate() / (value * 4)) - 1;
	74	#else
	75	count = (FREQ / (value * 4)) - 1;
	76	#endif
	77
	78	ixp4xx_spkr_control(pin, count);
	79
	80	return 0;
	81	}
	82
7d12e780	83	static irqreturn_t ixp4xx_spkr_interrupt(int irq, void *dev_id)
01387959 AZ	84	{
	85	/* clear interrupt */
	86	*IXP4XX_OSST = IXP4XX_OSST_TIMER_2_PEND;
	87
	88	/* flip the beeper output */
	89	*IXP4XX_GPIO_GPOUTR ^= (1 << (unsigned int) dev_id);
	90
	91	return IRQ_HANDLED;
	92	}
	93
	94	static int __devinit ixp4xx_spkr_probe(struct platform_device *dev)
	95	{
	96	struct input_dev *input_dev;
	97	int err;
	98
	99	input_dev = input_allocate_device();
	100	if (!input_dev)
	101	return -ENOMEM;
	102
373f9713 DT	103	input_set_drvdata(input_dev, (void *) dev->id);
373f9713 DT	104
01387959 AZ	105	input_dev->name = "ixp4xx beeper",
	106	input_dev->phys = "ixp4xx/gpio";
	107	input_dev->id.bustype = BUS_HOST;
	108	input_dev->id.vendor = 0x001f;
	109	input_dev->id.product = 0x0001;
	110	input_dev->id.version = 0x0100;
293e6392	111	input_dev->dev.parent = &dev->dev;
01387959	112
7b19ada2 JS	113	input_dev->evbit[0] = BIT_MASK(EV_SND);
7b19ada2 JS	114	input_dev->sndbit[0] = BIT_MASK(SND_BELL) \| BIT_MASK(SND_TONE);
01387959 AZ	115	input_dev->event = ixp4xx_spkr_event;
	116
	117	err = request_irq(IRQ_IXP4XX_TIMER2, &ixp4xx_spkr_interrupt,
dace1453	118	IRQF_DISABLED \| IRQF_TIMER, "ixp4xx-beeper", (void *) dev->id);
01387959 AZ	119	if (err)
	120	goto err_free_device;
	121
	122	err = input_register_device(input_dev);
	123	if (err)
	124	goto err_free_irq;
	125
	126	platform_set_drvdata(dev, input_dev);
	127
	128	return 0;
	129
	130	err_free_irq:
	131	free_irq(IRQ_IXP4XX_TIMER2, dev);
	132	err_free_device:
	133	input_free_device(input_dev);
	134
	135	return err;
	136	}
	137
	138	static int __devexit ixp4xx_spkr_remove(struct platform_device *dev)
	139	{
	140	struct input_dev *input_dev = platform_get_drvdata(dev);
373f9713	141	unsigned int pin = (unsigned int) input_get_drvdata(input_dev);
01387959 AZ	142
	143	input_unregister_device(input_dev);
	144	platform_set_drvdata(dev, NULL);
	145
	146	/* turn the speaker off */
	147	disable_irq(IRQ_IXP4XX_TIMER2);
	148	ixp4xx_spkr_control(pin, 0);
	149
	150	free_irq(IRQ_IXP4XX_TIMER2, dev);
	151
	152	return 0;
	153	}
	154
	155	static void ixp4xx_spkr_shutdown(struct platform_device *dev)
	156	{
	157	struct input_dev *input_dev = platform_get_drvdata(dev);
373f9713	158	unsigned int pin = (unsigned int) input_get_drvdata(input_dev);
01387959 AZ	159
	160	/* turn off the speaker */
	161	disable_irq(IRQ_IXP4XX_TIMER2);
	162	ixp4xx_spkr_control(pin, 0);
	163	}
	164
	165	static struct platform_driver ixp4xx_spkr_platform_driver = {
	166	.driver = {
	167	.name = "ixp4xx-beeper",
	168	.owner = THIS_MODULE,
	169	},
	170	.probe = ixp4xx_spkr_probe,
	171	.remove = __devexit_p(ixp4xx_spkr_remove),
	172	.shutdown = ixp4xx_spkr_shutdown,
	173	};
	174
	175	static int __init ixp4xx_spkr_init(void)
	176	{
	177	return platform_driver_register(&ixp4xx_spkr_platform_driver);
	178	}
	179
	180	static void __exit ixp4xx_spkr_exit(void)
	181	{
	182	platform_driver_unregister(&ixp4xx_spkr_platform_driver);
	183	}
	184
	185	module_init(ixp4xx_spkr_init);
	186	module_exit(ixp4xx_spkr_exit);