1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2000-2003
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 */
6
7 #include <common.h>
8 #include <status_led.h>
9
10 /*
11 * The purpose of this code is to signal the operational status of a
12 * target which usually boots over the network; while running in
13 * U-Boot, a status LED is blinking. As soon as a valid BOOTP reply
14 * message has been received, the LED is turned off. The Linux
15 * kernel, once it is running, will start blinking the LED again,
16 * with another frequency.
17 */
18
19 /* ------------------------------------------------------------------------- */
20
21 typedef struct {
22 led_id_t mask;
23 int state;
24 int period;
25 int cnt;
26 } led_dev_t;
27
28 led_dev_t led_dev[] = {
29 { CONFIG_LED_STATUS_BIT,
30 CONFIG_LED_STATUS_STATE,
31 LED_STATUS_PERIOD,
32 0,
33 },
34 #if defined(CONFIG_LED_STATUS1)
35 { CONFIG_LED_STATUS_BIT1,
36 CONFIG_LED_STATUS_STATE1,
37 LED_STATUS_PERIOD1,
38 0,
39 },
40 #endif
41 #if defined(CONFIG_LED_STATUS2)
42 { CONFIG_LED_STATUS_BIT2,
43 CONFIG_LED_STATUS_STATE2,
44 LED_STATUS_PERIOD2,
45 0,
46 },
47 #endif
48 #if defined(CONFIG_LED_STATUS3)
49 { CONFIG_LED_STATUS_BIT3,
50 CONFIG_LED_STATUS_STATE3,
51 LED_STATUS_PERIOD3,
52 0,
53 },
54 #endif
55 #if defined(CONFIG_LED_STATUS4)
56 { CONFIG_LED_STATUS_BIT4,
57 CONFIG_LED_STATUS_STATE4,
58 LED_STATUS_PERIOD4,
59 0,
60 },
61 #endif
62 #if defined(CONFIG_LED_STATUS5)
63 { CONFIG_LED_STATUS_BIT5,
64 CONFIG_LED_STATUS_STATE5,
65 LED_STATUS_PERIOD5,
66 0,
67 },
68 #endif
69 };
70
71 #define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
72
73 static int status_led_init_done = 0;
74
status_led_init(void)75 void status_led_init(void)
76 {
77 led_dev_t *ld;
78 int i;
79
80 for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++)
81 __led_init (ld->mask, ld->state);
82 status_led_init_done = 1;
83 }
84
status_led_tick(ulong timestamp)85 void status_led_tick(ulong timestamp)
86 {
87 led_dev_t *ld;
88 int i;
89
90 if (!status_led_init_done)
91 status_led_init();
92
93 for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) {
94
95 if (ld->state != CONFIG_LED_STATUS_BLINKING)
96 continue;
97
98 if (++ld->cnt >= ld->period) {
99 __led_toggle (ld->mask);
100 ld->cnt -= ld->period;
101 }
102
103 }
104 }
105
status_led_set(int led,int state)106 void status_led_set(int led, int state)
107 {
108 led_dev_t *ld;
109
110 if (led < 0 || led >= MAX_LED_DEV)
111 return;
112
113 if (!status_led_init_done)
114 status_led_init();
115
116 ld = &led_dev[led];
117
118 ld->state = state;
119 if (state == CONFIG_LED_STATUS_BLINKING) {
120 ld->cnt = 0; /* always start with full period */
121 state = CONFIG_LED_STATUS_ON; /* always start with LED _ON_ */
122 }
123 __led_set (ld->mask, state);
124 }
125