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wdenk48b42612003-06-19 23:01:32 +00001/*
2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
Wolfgang Denk3765b3e2013-10-07 13:07:26 +02005 * SPDX-License-Identifier: GPL-2.0+
wdenk48b42612003-06-19 23:01:32 +00006 */
7
8#include <common.h>
9#include <status_led.h>
10
11/*
12 * The purpose of this code is to signal the operational status of a
13 * target which usually boots over the network; while running in
14 * U-Boot, a status LED is blinking. As soon as a valid BOOTP reply
15 * message has been received, the LED is turned off. The Linux
16 * kernel, once it is running, will start blinking the LED again,
17 * with another frequency.
18 */
19
20/* ------------------------------------------------------------------------- */
21
wdenk48b42612003-06-19 23:01:32 +000022typedef struct {
23 led_id_t mask;
24 int state;
25 int period;
26 int cnt;
27} led_dev_t;
28
29led_dev_t led_dev[] = {
30 { STATUS_LED_BIT,
31 STATUS_LED_STATE,
32 STATUS_LED_PERIOD,
33 0,
34 },
35#if defined(STATUS_LED_BIT1)
36 { STATUS_LED_BIT1,
37 STATUS_LED_STATE1,
38 STATUS_LED_PERIOD1,
39 0,
40 },
41#endif
42#if defined(STATUS_LED_BIT2)
43 { STATUS_LED_BIT2,
44 STATUS_LED_STATE2,
45 STATUS_LED_PERIOD2,
46 0,
47 },
48#endif
49#if defined(STATUS_LED_BIT3)
50 { STATUS_LED_BIT3,
51 STATUS_LED_STATE3,
52 STATUS_LED_PERIOD3,
53 0,
54 },
55#endif
Stefan Roesea8eeaf22015-03-11 09:51:39 +010056#if defined(STATUS_LED_BIT4)
57 { STATUS_LED_BIT4,
58 STATUS_LED_STATE4,
59 STATUS_LED_PERIOD4,
60 0,
61 },
62#endif
63#if defined(STATUS_LED_BIT5)
64 { STATUS_LED_BIT5,
65 STATUS_LED_STATE5,
66 STATUS_LED_PERIOD5,
67 0,
68 },
69#endif
wdenk48b42612003-06-19 23:01:32 +000070};
71
72#define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
73
74static int status_led_init_done = 0;
75
76static void status_led_init (void)
77{
78 led_dev_t *ld;
79 int i;
80
81 for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++)
82 __led_init (ld->mask, ld->state);
83 status_led_init_done = 1;
84}
85
86void status_led_tick (ulong timestamp)
87{
88 led_dev_t *ld;
89 int i;
90
91 if (!status_led_init_done)
92 status_led_init ();
93
94 for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) {
95
96 if (ld->state != STATUS_LED_BLINKING)
97 continue;
98
99 if (++ld->cnt >= ld->period) {
100 __led_toggle (ld->mask);
101 ld->cnt -= ld->period;
102 }
103
104 }
105}
106
107void status_led_set (int led, int state)
108{
109 led_dev_t *ld;
110
111 if (led < 0 || led >= MAX_LED_DEV)
112 return;
113
114 if (!status_led_init_done)
115 status_led_init ();
116
117 ld = &led_dev[led];
118
119 ld->state = state;
120 if (state == STATUS_LED_BLINKING) {
121 ld->cnt = 0; /* always start with full period */
122 state = STATUS_LED_ON; /* always start with LED _ON_ */
123 }
124 __led_set (ld->mask, state);
125}