xref: /openbmc/u-boot/cmd/misc.c (revision 0a333602)
1 /*
2  * (C) Copyright 2001
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 /*
9  * Misc functions
10  */
11 #include <common.h>
12 #include <command.h>
13 #include <console.h>
14 
15 static int do_sleep(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
16 {
17 	ulong start = get_timer(0);
18 	ulong mdelay = 0;
19 	ulong delay;
20 	char *frpart;
21 
22 	if (argc != 2)
23 		return CMD_RET_USAGE;
24 
25 	delay = simple_strtoul(argv[1], NULL, 10) * CONFIG_SYS_HZ;
26 
27 	frpart = strchr(argv[1], '.');
28 
29 	if (frpart) {
30 		uint mult = CONFIG_SYS_HZ / 10;
31 		for (frpart++; *frpart != '\0' && mult > 0; frpart++) {
32 			if (*frpart < '0' || *frpart > '9') {
33 				mdelay = 0;
34 				break;
35 			}
36 			mdelay += (*frpart - '0') * mult;
37 			mult /= 10;
38 		}
39 	}
40 
41 	delay += mdelay;
42 
43 	while (get_timer(start) < delay) {
44 		if (ctrlc())
45 			return (-1);
46 
47 		udelay(100);
48 	}
49 
50 	return 0;
51 }
52 
53 U_BOOT_CMD(
54 	sleep ,    2,    1,     do_sleep,
55 	"delay execution for some time",
56 	"N\n"
57 	"    - delay execution for N seconds (N is _decimal_ and can be\n"
58 	"      fractional)"
59 );
60 
61 #ifdef CONFIG_CMD_TIMER
62 static int do_timer(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
63 {
64 	static ulong start;
65 
66 	if (argc != 2)
67 		return CMD_RET_USAGE;
68 
69 	if (!strcmp(argv[1], "start"))
70 		start = get_timer(0);
71 
72 	if (!strcmp(argv[1], "get")) {
73 		ulong msecs = get_timer(start) * 1000 / CONFIG_SYS_HZ;
74 		printf("%ld.%03d\n", msecs / 1000, (int)(msecs % 1000));
75 	}
76 
77 	return 0;
78 }
79 
80 U_BOOT_CMD(
81 	timer,    2,    1,     do_timer,
82 	"access the system timer",
83 	"start - Reset the timer reference.\n"
84 	"timer get   - Print the time since 'start'."
85 );
86 #endif
87