status_led.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
#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.
*/
/* ------------------------------------------------------------------------- */
typedef struct {
led_id_t mask;
int state;
int period;
int cnt;
} led_dev_t;
led_dev_t led_dev[] = {
{ CONFIG_LED_STATUS_BIT,
CONFIG_LED_STATUS_STATE,
LED_STATUS_PERIOD,
0,
},
#if defined(CONFIG_LED_STATUS1)
{ CONFIG_LED_STATUS_BIT1,
CONFIG_LED_STATUS_STATE1,
LED_STATUS_PERIOD1,
0,
},
#endif
#if defined(CONFIG_LED_STATUS2)
{ CONFIG_LED_STATUS_BIT2,
CONFIG_LED_STATUS_STATE2,
LED_STATUS_PERIOD2,
0,
},
#endif
#if defined(CONFIG_LED_STATUS3)
{ CONFIG_LED_STATUS_BIT3,
CONFIG_LED_STATUS_STATE3,
LED_STATUS_PERIOD3,
0,
},
#endif
#if defined(CONFIG_LED_STATUS4)
{ CONFIG_LED_STATUS_BIT4,
CONFIG_LED_STATUS_STATE4,
LED_STATUS_PERIOD4,
0,
},
#endif
#if defined(CONFIG_LED_STATUS5)
{ CONFIG_LED_STATUS_BIT5,
CONFIG_LED_STATUS_STATE5,
LED_STATUS_PERIOD5,
0,
},
#endif
};
#define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
static int status_led_init_done = 0;
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 != CONFIG_LED_STATUS_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 == CONFIG_LED_STATUS_BLINKING) {
ld->cnt = 0; /* always start with full period */
state = CONFIG_LED_STATUS_ON; /* always start with LED _ON_ */
}
__led_set (ld->mask, state);
}