1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Status LED driver based on GPIO access conventions of Linux
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
5*4882a593Smuzhiyun * Licensed under the GPL-2 or later.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <status_led.h>
10*4882a593Smuzhiyun #include <asm/gpio.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #ifndef CONFIG_GPIO_LED_INVERTED_TABLE
13*4882a593Smuzhiyun #define CONFIG_GPIO_LED_INVERTED_TABLE {}
14*4882a593Smuzhiyun #endif
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun static led_id_t gpio_led_inv[] = CONFIG_GPIO_LED_INVERTED_TABLE;
17*4882a593Smuzhiyun
gpio_led_gpio_value(led_id_t mask,int state)18*4882a593Smuzhiyun static int gpio_led_gpio_value(led_id_t mask, int state)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun int i, gpio_value = (state == CONFIG_LED_STATUS_ON);
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun for (i = 0; i < ARRAY_SIZE(gpio_led_inv); i++) {
23*4882a593Smuzhiyun if (gpio_led_inv[i] == mask)
24*4882a593Smuzhiyun gpio_value = !gpio_value;
25*4882a593Smuzhiyun }
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun return gpio_value;
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun
__led_init(led_id_t mask,int state)30*4882a593Smuzhiyun void __led_init(led_id_t mask, int state)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun int gpio_value;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun if (gpio_request(mask, "gpio_led") != 0) {
35*4882a593Smuzhiyun printf("%s: failed requesting GPIO%lu!\n", __func__, mask);
36*4882a593Smuzhiyun return;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun gpio_value = gpio_led_gpio_value(mask, state);
40*4882a593Smuzhiyun gpio_direction_output(mask, gpio_value);
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
__led_set(led_id_t mask,int state)43*4882a593Smuzhiyun void __led_set(led_id_t mask, int state)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun int gpio_value = gpio_led_gpio_value(mask, state);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun gpio_set_value(mask, gpio_value);
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
__led_toggle(led_id_t mask)50*4882a593Smuzhiyun void __led_toggle(led_id_t mask)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun gpio_set_value(mask, !gpio_get_value(mask));
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun #ifdef CONFIG_GPIO_LED_STUBS
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun /* 'generic' override of colored LED stubs, to use GPIO functions instead */
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun #ifdef CONFIG_LED_STATUS_RED
red_led_on(void)60*4882a593Smuzhiyun void red_led_on(void)
61*4882a593Smuzhiyun {
62*4882a593Smuzhiyun __led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_ON);
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
red_led_off(void)65*4882a593Smuzhiyun void red_led_off(void)
66*4882a593Smuzhiyun {
67*4882a593Smuzhiyun __led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_OFF);
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun #endif
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun #ifdef CONFIG_LED_STATUS_GREEN
green_led_on(void)72*4882a593Smuzhiyun void green_led_on(void)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun __led_set(CONFIG_LED_STATUS_GREEN, CONFIG_LED_STATUS_ON);
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
green_led_off(void)77*4882a593Smuzhiyun void green_led_off(void)
78*4882a593Smuzhiyun {
79*4882a593Smuzhiyun __led_set(CONFIG_LED_STATUS_GREEN, CONFIG_LED_STATUS_OFF);
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun #endif
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun #ifdef CONFIG_LED_STATUS_YELLOW
yellow_led_on(void)84*4882a593Smuzhiyun void yellow_led_on(void)
85*4882a593Smuzhiyun {
86*4882a593Smuzhiyun __led_set(CONFIG_LED_STATUS_YELLOW, CONFIG_LED_STATUS_ON);
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
yellow_led_off(void)89*4882a593Smuzhiyun void yellow_led_off(void)
90*4882a593Smuzhiyun {
91*4882a593Smuzhiyun __led_set(CONFIG_LED_STATUS_YELLOW, CONFIG_LED_STATUS_OFF);
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun #endif
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun #ifdef CONFIG_LED_STATUS_BLUE
blue_led_on(void)96*4882a593Smuzhiyun void blue_led_on(void)
97*4882a593Smuzhiyun {
98*4882a593Smuzhiyun __led_set(CONFIG_LED_STATUS_BLUE, CONFIG_LED_STATUS_ON);
99*4882a593Smuzhiyun }
100*4882a593Smuzhiyun
blue_led_off(void)101*4882a593Smuzhiyun void blue_led_off(void)
102*4882a593Smuzhiyun {
103*4882a593Smuzhiyun __led_set(CONFIG_LED_STATUS_BLUE, CONFIG_LED_STATUS_OFF);
104*4882a593Smuzhiyun }
105*4882a593Smuzhiyun #endif
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun #endif /* CONFIG_GPIO_LED_STUBS */
108