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/*

 *  m68k beeper driver for Linux

 *

 *  Copyright (c) 2002 Richard Zidlicky

 *  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/init.h>

#include <linux/input.h>

#include <linux/platform_device.h>

#include <asm/machdep.h>

#include <asm/io.h>

MODULE_AUTHOR("Richard Zidlicky <rz@linux-m68k.org>");

MODULE_DESCRIPTION("m68k beeper driver");

MODULE_LICENSE("GPL");

static struct platform_device *m68kspkr_platform_device;

static int m68kspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)

{

        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)

                count = 1193182 / value;

        mach_beep(count, -1);

        return 0;

}

static int __devinit m68kspkr_probe(struct platform_device *dev)

{

        struct input_dev *input_dev;

        int err;

        input_dev = input_allocate_device();

        if (!input_dev)

                return -ENOMEM;

        input_dev->name = "m68k beeper";

        input_dev->phys = "m68k/generic";

        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 = m68kspkr_event;

        err = input_register_device(input_dev);

        if (err) {

                input_free_device(input_dev);

                return err;

        }

        platform_set_drvdata(dev, input_dev);

        return 0;

}

static int __devexit m68kspkr_remove(struct platform_device *dev)

{

        struct input_dev *input_dev = platform_get_drvdata(dev);

        input_unregister_device(input_dev);

        platform_set_drvdata(dev, NULL);

        /* turn off the speaker */

        m68kspkr_event(NULL, EV_SND, SND_BELL, 0);

        return 0;

}

static void m68kspkr_shutdown(struct platform_device *dev)

{

        /* turn off the speaker */

        m68kspkr_event(NULL, EV_SND, SND_BELL, 0);

}

static struct platform_driver m68kspkr_platform_driver = {

        .driver         = {

                .name   = "m68kspkr",

                .owner  = THIS_MODULE,

        },

        .probe          = m68kspkr_probe,

        .remove         = __devexit_p(m68kspkr_remove),

        .shutdown       = m68kspkr_shutdown,

};

static int __init m68kspkr_init(void)

{

        int err;

        if (!mach_beep) {

                printk(KERN_INFO "m68kspkr: no lowlevel beep support\n");

                return -ENODEV;

        }

        err = platform_driver_register(&m68kspkr_platform_driver);

        if (err)

                return err;

        m68kspkr_platform_device = platform_device_alloc("m68kspkr", -1);

        if (!m68kspkr_platform_device) {

                err = -ENOMEM;

                goto err_unregister_driver;

        }

        err = platform_device_add(m68kspkr_platform_device);

        if (err)

                goto err_free_device;

        return 0;

 err_free_device:

        platform_device_put(m68kspkr_platform_device);

 err_unregister_driver:

        platform_driver_unregister(&m68kspkr_platform_driver);

        return err;

}

static void __exit m68kspkr_exit(void)

{

        platform_device_unregister(m68kspkr_platform_device);

        platform_driver_unregister(&m68kspkr_platform_driver);

}

module_init(m68kspkr_init);

module_exit(m68kspkr_exit);