aboutsummaryrefslogtreecommitdiff
path: root/board/altera/common/epled.c
blob: 639170f7fd0c7a91622d16ab8225030ef57233ab (plain)
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
/*
 * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
 * Scott McNutt <smcnutt@psyent.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+ 
 */

#include <common.h>
#include <asm/io.h>
#include <nios2-io.h>
#include <status_led.h>

/* The LED port is configured as output only, so we
 * must track the state manually.
 */
static led_id_t val = 0;

void __led_init (led_id_t mask, int state)
{
	nios_pio_t *pio = (nios_pio_t *)CONFIG_SYS_LEDPIO_ADDR;

	if (state == STATUS_LED_ON)
		val &= ~mask;
	else
		val |= mask;
	writel (val, &pio->data);
}

void __led_set (led_id_t mask, int state)
{
	nios_pio_t *pio = (nios_pio_t *)CONFIG_SYS_LEDPIO_ADDR;

	if (state == STATUS_LED_ON)
		val &= ~mask;
	else
		val |= mask;
	writel (val, &pio->data);
}

void __led_toggle (led_id_t mask)
{
	nios_pio_t *pio = (nios_pio_t *)CONFIG_SYS_LEDPIO_ADDR;

	val ^= mask;
	writel (val, &pio->data);
}