base/leds/leds.c

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/*
 * rtai_leds.c - mini-driver for generic control of digital signals
 *
 * Copyright (C) 2000  Pierre Cloutier <pcloutier@PoseidonControls.com>
 *               2001  David A. Schleef <ds@schleef.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <rtai.h>
#include <rtai_leds.h>

MODULE_LICENSE("GPL");

static unsigned int leds;
static unsigned long port;

static void (*leds_func)(unsigned long port, unsigned int leds);

void rt_leds_set_mask(unsigned int mask, unsigned int value)
{
    leds &= ~mask;
    leds |= (mask & value);
    leds_func(port, leds);
}

void rt_toggle_leds(unsigned int l)
{
    leds ^= l;
    leds_func(port, leds);
}

void rt_reset_leds(unsigned int l)
{
    leds &= ~l;
    leds_func(port, leds);
}

void rt_set_leds(unsigned int l)
{
    leds |= l;
    leds_func(port, leds);
}

void rt_clear_leds(void)
{
    leds = 0;
    leds_func(port, leds);
}

unsigned int rt_get_leds(void)
{
    return leds;
}

void rt_set_leds_port(int p)
{
    port = p;
}

void rt_config_leds(unsigned int type,
    void (*func)(unsigned long p, unsigned int l),
    unsigned long p)
{

    switch(type){
    case 0:
        leds_func = func;
        port = p;
        break;
    case 1:
        leds_func = LEDS_DEFAULT_FUNC;
        port = LEDS_DEFAULT_PORT;
        break;
    }
}

int __rtai_leds_init(void)
{
    rt_config_leds(1,NULL,0);

    printk(KERN_INFO "RTAI[leds]: loaded.\n");
    return(0);
}

void __rtai_leds_exit(void)
{
    printk(KERN_INFO "RTAI[leds]: unloaded.\n");
}

#ifndef CONFIG_RTAI_LEDS_BUILTIN
module_init(__rtai_leds_init);
module_exit(__rtai_leds_exit);
#endif /* !CONFIG_RTAI_LEDS_BUILTIN */

#ifdef CONFIG_KBUILD
EXPORT_SYMBOL(rt_leds_set_mask);
EXPORT_SYMBOL(rt_toggle_leds);
EXPORT_SYMBOL(rt_reset_leds);
EXPORT_SYMBOL(rt_set_leds);
EXPORT_SYMBOL(rt_clear_leds);
EXPORT_SYMBOL(rt_get_leds);
EXPORT_SYMBOL(rt_set_leds_port);
EXPORT_SYMBOL(rt_config_leds);
#endif /* CONFIG_KBUILD */

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