1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2000
4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5  */
6 
7 #include <common.h>
8 #include <bootretry.h>
9 #include <cli.h>
10 #include <env.h>
11 #include <errno.h>
12 #include <time.h>
13 #include <watchdog.h>
14 
15 #ifndef CONFIG_BOOT_RETRY_MIN
16 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
17 #endif
18 
19 static uint64_t endtime;  /* must be set, default is instant timeout */
20 static int      retry_time = -1; /* -1 so can call readline before main_loop */
21 
22 /***************************************************************************
23  * initialize command line timeout
24  */
bootretry_init_cmd_timeout(void)25 void bootretry_init_cmd_timeout(void)
26 {
27 	char *s = env_get("bootretry");
28 
29 	if (s != NULL)
30 		retry_time = (int)simple_strtol(s, NULL, 10);
31 	else
32 		retry_time = CONFIG_BOOT_RETRY_TIME;
33 
34 	if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
35 		retry_time = CONFIG_BOOT_RETRY_MIN;
36 }
37 
38 /***************************************************************************
39  * reset command line timeout to retry_time seconds
40  */
bootretry_reset_cmd_timeout(void)41 void bootretry_reset_cmd_timeout(void)
42 {
43 	endtime = endtick(retry_time);
44 }
45 
bootretry_tstc_timeout(void)46 int bootretry_tstc_timeout(void)
47 {
48 	while (!tstc()) {	/* while no incoming data */
49 		if (retry_time >= 0 && get_ticks() > endtime)
50 			return -ETIMEDOUT;
51 		WATCHDOG_RESET();
52 	}
53 
54 	return 0;
55 }
56 
bootretry_dont_retry(void)57 void bootretry_dont_retry(void)
58 {
59 	retry_time = -1;
60 }
61