/* * (C) Copyright 2000-2003 * 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 <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 * U-Boot, 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 { led_id_t 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) { led_dev_t *ld; int i; for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) __led_init (ld->mask, ld->state); status_led_init_done = 1; } void status_led_tick (ulong timestamp) { led_dev_t *ld; int i; if (!status_led_init_done) status_led_init (); for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) { if (ld->state != STATUS_LED_BLINKING) continue; if (++ld->cnt >= ld->period) { __led_toggle (ld->mask); ld->cnt -= ld->period; } } } void status_led_set (int led, int state) { led_dev_t *ld; if (led < 0 || led >= MAX_LED_DEV) return; if (!status_led_init_done) status_led_init (); ld = &led_dev[led]; ld->state = state; if (state == STATUS_LED_BLINKING) { ld->cnt = 0; /* always start with full period */ state = STATUS_LED_ON; /* always start with LED _ON_ */ } __led_set (ld->mask, state); } #endif /* CONFIG_STATUS_LED */