summaryrefslogtreecommitdiff
path: root/arch/arm/cpu/arm920t/ep93xx/led.c
blob: 61447291854fb0ae047972679bf50607331cae35 (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
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
/*
 * Copyright (C) 2010, 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <asm/io.h>
#include <asm/arch/ep93xx.h>
#include <config.h>
#include <status_led.h>

static uint8_t saved_state[2] = {STATUS_LED_OFF, STATUS_LED_OFF};
static uint32_t gpio_pin[2] = {1 << STATUS_LED_GREEN,
			       1 << STATUS_LED_RED};

inline void switch_LED_on(uint8_t led)
{
	register struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE;

	writel(readl(&gpio->pedr) | gpio_pin[led], &gpio->pedr);
	saved_state[led] = STATUS_LED_ON;
}

inline void switch_LED_off(uint8_t led)
{
	register struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE;

	writel(readl(&gpio->pedr) & ~gpio_pin[led], &gpio->pedr);
	saved_state[led] = STATUS_LED_OFF;
}

void red_led_on(void)
{
	switch_LED_on(STATUS_LED_RED);
}

void red_led_off(void)
{
	switch_LED_off(STATUS_LED_RED);
}

void green_led_on(void)
{
	switch_LED_on(STATUS_LED_GREEN);
}

void green_led_off(void)
{
	switch_LED_off(STATUS_LED_GREEN);
}

void __led_init(led_id_t mask, int state)
{
	__led_set(mask, state);
}

void __led_toggle(led_id_t mask)
{
	if (STATUS_LED_RED == mask) {
		if (STATUS_LED_ON == saved_state[STATUS_LED_RED])
			red_led_off();
		else
			red_led_on();
	} else if (STATUS_LED_GREEN == mask) {
		if (STATUS_LED_ON == saved_state[STATUS_LED_GREEN])
			green_led_off();
		else
			green_led_on();
	}
}

void __led_set(led_id_t mask, int state)
{
	if (STATUS_LED_RED == mask) {
		if (STATUS_LED_ON == state)
			red_led_on();
		else
			red_led_off();
	} else if (STATUS_LED_GREEN == mask) {
		if (STATUS_LED_ON == state)
			green_led_on();
		else
			green_led_off();
	}
}