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Diffstat (limited to 'include/asm-nios/status_led.h')
| -rw-r--r-- | include/asm-nios/status_led.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/include/asm-nios/status_led.h b/include/asm-nios/status_led.h new file mode 100644 index 000000000..241c91768 --- /dev/null +++ b/include/asm-nios/status_led.h @@ -0,0 +1,132 @@ +/* + * (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__ */ |