| wdenk | c935d3b | 2004-01-03 19:43:48 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2003, Li-Pro.Net <www.li-pro.net> |
| 3 | * Stephan Linz <linz@li-pro.net> |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | * |
| 23 | * asm-nios/status_led.h |
| 24 | * |
| 25 | * NIOS PIO based status led support functions |
| 26 | */ |
| 27 | |
| 28 | #ifndef __ASM_STATUS_LED_H__ |
| 29 | #define __ASM_STATUS_LED_H__ |
| 30 | |
| 31 | #include <nios-io.h> |
| 32 | |
| 33 | /* led_id_t is unsigned int mask */ |
| 34 | typedef unsigned int led_id_t; |
| 35 | |
| 36 | #ifdef STATUS_LED_WRONLY /* emulate read access */ |
| 37 | static led_id_t __led_portval = 0; |
| 38 | #endif |
| 39 | |
| 40 | static inline void __led_init (led_id_t mask, int state) |
| 41 | { |
| 42 | nios_pio_t *piop = (nios_pio_t*)STATUS_LED_BASE; |
| 43 | |
| 44 | #ifdef STATUS_LED_WRONLY /* emulate read access */ |
| 45 | |
| 46 | #if (STATUS_LED_ACTIVE == 0) |
| 47 | if (state == STATUS_LED_ON) |
| 48 | __led_portval &= ~mask; |
| 49 | else |
| 50 | __led_portval |= mask; |
| 51 | #else |
| 52 | if (state == STATUS_LED_ON) |
| 53 | __led_portval |= mask; |
| 54 | else |
| 55 | __led_portval &= ~mask; |
| 56 | #endif |
| 57 | |
| 58 | piop->data = __led_portval; |
| 59 | |
| 60 | #else /* !STATUS_LED_WRONLY */ |
| 61 | |
| 62 | #if (STATUS_LED_ACTIVE == 0) |
| 63 | if (state == STATUS_LED_ON) |
| 64 | piop->data &= ~mask; |
| 65 | else |
| 66 | piop->data |= mask; |
| 67 | #else |
| 68 | if (state == STATUS_LED_ON) |
| 69 | piop->data |= mask; |
| 70 | else |
| 71 | piop->data &= ~mask; |
| 72 | #endif |
| 73 | |
| 74 | piop->direction |= mask; |
| 75 | |
| 76 | #endif /* STATUS_LED_WRONLY */ |
| 77 | } |
| 78 | |
| 79 | static inline void __led_toggle (led_id_t mask) |
| 80 | { |
| 81 | nios_pio_t *piop = (nios_pio_t*)STATUS_LED_BASE; |
| 82 | |
| 83 | #ifdef STATUS_LED_WRONLY /* emulate read access */ |
| 84 | |
| 85 | __led_portval ^= mask; |
| 86 | piop->data = __led_portval; |
| 87 | |
| 88 | #else /* !STATUS_LED_WRONLY */ |
| 89 | |
| 90 | piop->data ^= mask; |
| 91 | |
| 92 | #endif /* STATUS_LED_WRONLY */ |
| 93 | } |
| 94 | |
| 95 | static inline void __led_set (led_id_t mask, int state) |
| 96 | { |
| 97 | nios_pio_t *piop = (nios_pio_t*)STATUS_LED_BASE; |
| 98 | |
| 99 | #ifdef STATUS_LED_WRONLY /* emulate read access */ |
| 100 | |
| 101 | #if (STATUS_LED_ACTIVE == 0) |
| 102 | if (state == STATUS_LED_ON) |
| 103 | __led_portval &= ~mask; |
| 104 | else |
| 105 | __led_portval |= mask; |
| 106 | #else |
| 107 | if (state == STATUS_LED_ON) |
| 108 | __led_portval |= mask; |
| 109 | else |
| 110 | __led_portval &= ~mask; |
| 111 | #endif |
| 112 | |
| 113 | piop->data = __led_portval; |
| 114 | |
| 115 | #else /* !STATUS_LED_WRONLY */ |
| 116 | |
| 117 | #if (STATUS_LED_ACTIVE == 0) |
| 118 | if (state == STATUS_LED_ON) |
| 119 | piop->data &= ~mask; |
| 120 | else |
| 121 | piop->data |= mask; |
| 122 | #else |
| 123 | if (state == STATUS_LED_ON) |
| 124 | piop->data |= mask; |
| 125 | else |
| 126 | piop->data &= ~mask; |
| 127 | #endif |
| 128 | |
| 129 | #endif /* STATUS_LED_WRONLY */ |
| 130 | } |
| 131 | |
| 132 | #endif /* __ASM_STATUS_LED_H__ */ |