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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 | /* * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * 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 */ #include <common.h> #include <mpc8xx.h> #include <status_led.h> /* * The purpose of this code is to signal the operational status of a * target which usually boots over the network; while running in * PCBoot, a status LED is blinking. As soon as a valid BOOTP reply * message has been received, the LED is turned off. The Linux * kernel, once it is running, will start blinking the LED again, * with another frequency. */ /* ------------------------------------------------------------------------- */ #ifdef CONFIG_STATUS_LED typedef struct { ulong mask; int state; int period; int cnt; } led_dev_t; led_dev_t led_dev[] = { { STATUS_LED_BIT, STATUS_LED_STATE, STATUS_LED_PERIOD, 0, }, #if defined(STATUS_LED_BIT1) { STATUS_LED_BIT1, STATUS_LED_STATE1, STATUS_LED_PERIOD1, 0, }, #endif #if defined(STATUS_LED_BIT2) { STATUS_LED_BIT2, STATUS_LED_STATE2, STATUS_LED_PERIOD2, 0, }, #endif #if defined(STATUS_LED_BIT3) { STATUS_LED_BIT3, STATUS_LED_STATE3, STATUS_LED_PERIOD3, 0, }, #endif }; #define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t)) static int status_led_init_done = 0; static void status_led_init (void) { volatile immap_t *immr = (immap_t *)CFG_IMMR; int i; for (i=0; i<MAX_LED_DEV; ++i) { led_dev_t *ld = &led_dev[i]; immr->STATUS_LED_PAR &= ~(ld->mask); #ifdef STATUS_LED_ODR immr->STATUS_LED_ODR &= ~(ld->mask); #endif #if (STATUS_LED_ACTIVE == 0) if (ld->state == STATUS_LED_ON) immr->STATUS_LED_DAT &= ~(ld->mask); else immr->STATUS_LED_DAT |= ld->mask ; #else if (ld->state == STATUS_LED_ON) immr->STATUS_LED_DAT |= ld->mask ; else immr->STATUS_LED_DAT &= ~(ld->mask); #endif immr->STATUS_LED_DIR |= ld->mask ; } status_led_init_done = 1; } void status_led_tick (ulong timestamp) { volatile immap_t *immr = (immap_t *)CFG_IMMR; int i; if (!status_led_init_done) status_led_init(); for (i=0; i<MAX_LED_DEV; ++i) { led_dev_t *ld = &led_dev[i]; if (ld->state != STATUS_LED_BLINKING) continue; if (++(ld->cnt) >= ld->period) { immr->STATUS_LED_DAT ^= ld->mask; ld->cnt -= ld->period; } } } void status_led_set (int led, int state) { volatile immap_t *immr = (immap_t *)CFG_IMMR; led_dev_t *ld; if (led < 0 || led >= MAX_LED_DEV) return; if (!status_led_init_done) status_led_init(); ld = &led_dev[led]; switch (state) { default: return; case STATUS_LED_BLINKING: ld->cnt = 0; /* always start with full period */ /* fall through */ /* always start with LED _ON_ */ case STATUS_LED_ON: #if (STATUS_LED_ACTIVE == 0) immr->STATUS_LED_DAT &= ~(ld->mask); #else immr->STATUS_LED_DAT |= ld->mask ; #endif break; case STATUS_LED_OFF: #if (STATUS_LED_ACTIVE == 0) immr->STATUS_LED_DAT |= ld->mask ; #else immr->STATUS_LED_DAT &= ~(ld->mask); #endif break; } ld->state = state; } #endif /* CONFIG_STATUS_LED */ |