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/*
* (C) Copyright 2003, Li-Pro.Net <www.li-pro.net>
* Stephan Linz <linz@li-pro.net>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* 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
*
* asm-nios/status_led.h
*
* NIOS PIO based status led support functions
*/
#ifndef __ASM_STATUS_LED_H__
#define __ASM_STATUS_LED_H__
#include <nios-io.h>
/* led_id_t is unsigned int mask */
typedef unsigned int led_id_t;
#ifdef STATUS_LED_WRONLY /* emulate read access */
static led_id_t __led_portval = 0;
#endif
static inline void __led_init (led_id_t mask, int state)
{
nios_pio_t *piop = (nios_pio_t*)STATUS_LED_BASE;
#ifdef STATUS_LED_WRONLY /* emulate read access */
#if (STATUS_LED_ACTIVE == 0)
if (state == STATUS_LED_ON)
__led_portval &= ~mask;
else
__led_portval |= mask;
#else
if (state == STATUS_LED_ON)
__led_portval |= mask;
else
__led_portval &= ~mask;
#endif
piop->data = __led_portval;
#else /* !STATUS_LED_WRONLY */
#if (STATUS_LED_ACTIVE == 0)
if (state == STATUS_LED_ON)
piop->data &= ~mask;
else
piop->data |= mask;
#else
if (state == STATUS_LED_ON)
piop->data |= mask;
else
piop->data &= ~mask;
#endif
piop->direction |= mask;
#endif /* STATUS_LED_WRONLY */
}
static inline void __led_toggle (led_id_t mask)
{
nios_pio_t *piop = (nios_pio_t*)STATUS_LED_BASE;
#ifdef STATUS_LED_WRONLY /* emulate read access */
__led_portval ^= mask;
piop->data = __led_portval;
#else /* !STATUS_LED_WRONLY */
piop->data ^= mask;
#endif /* STATUS_LED_WRONLY */
}
static inline void __led_set (led_id_t mask, int state)
{
nios_pio_t *piop = (nios_pio_t*)STATUS_LED_BASE;
#ifdef STATUS_LED_WRONLY /* emulate read access */
#if (STATUS_LED_ACTIVE == 0)
if (state == STATUS_LED_ON)
__led_portval &= ~mask;
else
__led_portval |= mask;
#else
if (state == STATUS_LED_ON)
__led_portval |= mask;
else
__led_portval &= ~mask;
#endif
piop->data = __led_portval;
#else /* !STATUS_LED_WRONLY */
#if (STATUS_LED_ACTIVE == 0)
if (state == STATUS_LED_ON)
piop->data &= ~mask;
else
piop->data |= mask;
#else
if (state == STATUS_LED_ON)
piop->data |= mask;
else
piop->data &= ~mask;
#endif
#endif /* STATUS_LED_WRONLY */
}
#endif /* __ASM_STATUS_LED_H__ */
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