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 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 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 } 105 106 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