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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 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <status_led.h>
26
27/*
28 * The purpose of this code is to signal the operational status of a
29 * target which usually boots over the network; while running in
30 * U-Boot, a status LED is blinking. As soon as a valid BOOTP reply
31 * message has been received, the LED is turned off. The Linux
32 * kernel, once it is running, will start blinking the LED again,
33 * with another frequency.
34 */
35
36/* ------------------------------------------------------------------------- */
37
38#ifdef CONFIG_STATUS_LED
39
40typedef struct {
41 led_id_t mask;
42 int state;
43 int period;
44 int cnt;
45} led_dev_t;
46
47led_dev_t led_dev[] = {
48 { STATUS_LED_BIT,
49 STATUS_LED_STATE,
50 STATUS_LED_PERIOD,
51 0,
52 },
53#if defined(STATUS_LED_BIT1)
54 { STATUS_LED_BIT1,
55 STATUS_LED_STATE1,
56 STATUS_LED_PERIOD1,
57 0,
58 },
59#endif
60#if defined(STATUS_LED_BIT2)
61 { STATUS_LED_BIT2,
62 STATUS_LED_STATE2,
63 STATUS_LED_PERIOD2,
64 0,
65 },
66#endif
67#if defined(STATUS_LED_BIT3)
68 { STATUS_LED_BIT3,
69 STATUS_LED_STATE3,
70 STATUS_LED_PERIOD3,
71 0,
72 },
73#endif
74};
75
76#define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
77
78static int status_led_init_done = 0;
79
80static void status_led_init (void)
81{
82 led_dev_t *ld;
83 int i;
84
85 for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++)
86 __led_init (ld->mask, ld->state);
87 status_led_init_done = 1;
88}
89
90void status_led_tick (ulong timestamp)
91{
92 led_dev_t *ld;
93 int i;
94
95 if (!status_led_init_done)
96 status_led_init ();
97
98 for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) {
99
100 if (ld->state != STATUS_LED_BLINKING)
101 continue;
102
103 if (++ld->cnt >= ld->period) {
104 __led_toggle (ld->mask);
105 ld->cnt -= ld->period;
106 }
107
108 }
109}
110
111void status_led_set (int led, int state)
112{
113 led_dev_t *ld;
114
115 if (led < 0 || led >= MAX_LED_DEV)
116 return;
117
118 if (!status_led_init_done)
119 status_led_init ();
120
121 ld = &led_dev[led];
122
123 ld->state = state;
124 if (state == STATUS_LED_BLINKING) {
125 ld->cnt = 0; /* always start with full period */
126 state = STATUS_LED_ON; /* always start with LED _ON_ */
127 }
128 __led_set (ld->mask, state);
129}
130
131#endif /* CONFIG_STATUS_LED */