/* * (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__ */