2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
25 #include <status_led.h>
28 * The purpose of this code is to signal the operational status of a
29 * target which usually boots over the network; while running in
30 * U-Boot, a status LED is blinking. As soon as a valid BOOTP reply
31 * message has been received, the LED is turned off. The Linux
32 * kernel, once it is running, will start blinking the LED again,
33 * with another frequency.
36 /* ------------------------------------------------------------------------- */
45 led_dev_t led_dev[] = {
51 #if defined(STATUS_LED_BIT1)
58 #if defined(STATUS_LED_BIT2)
65 #if defined(STATUS_LED_BIT3)
74 #define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
76 static int status_led_init_done = 0;
78 static void status_led_init (void)
83 for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++)
84 __led_init (ld->mask, ld->state);
85 status_led_init_done = 1;
88 void status_led_tick (ulong timestamp)
93 if (!status_led_init_done)
96 for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) {
98 if (ld->state != STATUS_LED_BLINKING)
101 if (++ld->cnt >= ld->period) {
102 __led_toggle (ld->mask);
103 ld->cnt -= ld->period;
109 void status_led_set (int led, int state)
113 if (led < 0 || led >= MAX_LED_DEV)
116 if (!status_led_init_done)
122 if (state == STATUS_LED_BLINKING) {
123 ld->cnt = 0; /* always start with full period */
124 state = STATUS_LED_ON; /* always start with LED _ON_ */
126 __led_set (ld->mask, state);