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// SPDX-License-Identifier: GPL-2.0+
/* Copyright (C) 2025 Linaro Ltd. */
#include <command.h>
#include <console.h>
#include <dm/device.h>
#include <env.h>
#include <lwip/apps/sntp.h>
#include <lwip/timeouts.h>
#include <net.h>
U_BOOT_CMD(sntp, 2, 1, do_sntp, "synchronize RTC via network",
"[NTPServerNameOrIp]");
#define SNTP_TIMEOUT 10000
static enum done_state {
NOT_DONE = 0,
SUCCESS,
ABORTED,
TIMED_OUT
} sntp_state;
static void no_response(void *arg)
{
sntp_state = TIMED_OUT;
}
/* Called by lwIP via the SNTP_SET_SYSTEM_TIME() macro */
void sntp_set_system_time(uint32_t seconds)
{
char *toff;
int net_ntp_time_offset = 0;
toff = env_get("timeoffset");
if (toff)
net_ntp_time_offset = simple_strtol(toff, NULL, 10);
net_sntp_set_rtc(seconds + net_ntp_time_offset);
sntp_state = SUCCESS;
}
static bool ntp_server_known(void)
{
int i;
for (i = 0; i < SNTP_MAX_SERVERS; i++) {
const ip_addr_t *ip = sntp_getserver(i);
if (ip && ip->addr)
return true;
}
return false;
}
static int sntp_loop(struct udevice *udev, ip_addr_t *srvip)
{
struct netif *netif;
netif = net_lwip_new_netif(udev);
if (!netif)
return -1;
sntp_state = NOT_DONE;
sntp_setoperatingmode(SNTP_OPMODE_POLL);
sntp_servermode_dhcp(CONFIG_IS_ENABLED(CMD_DHCP));
if (srvip) {
sntp_setserver(0, srvip);
} else {
if (!ntp_server_known()) {
log_err("error: ntpserverip not set\n");
return -1;
}
}
sntp_init();
sys_timeout(SNTP_TIMEOUT, no_response, NULL);
while (sntp_state == NOT_DONE) {
net_lwip_rx(udev, netif);
sys_check_timeouts();
if (ctrlc()) {
printf("\nAbort\n");
sntp_state = ABORTED;
break;
}
}
sys_untimeout(no_response, NULL);
sntp_stop();
net_lwip_remove_netif(netif);
if (sntp_state == SUCCESS)
return 0;
return -1;
}
int do_sntp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
ip_addr_t *srvip;
char *server;
ip_addr_t ipaddr;
switch (argc) {
case 1:
srvip = NULL;
server = env_get("ntpserverip");
if (server) {
if (!ipaddr_aton(server, &ipaddr)) {
printf("ntpserverip is invalid\n");
return CMD_RET_FAILURE;
}
srvip = &ipaddr;
}
break;
case 2:
if (net_lwip_dns_resolve(argv[1], &ipaddr))
return CMD_RET_FAILURE;
srvip = &ipaddr;
break;
default:
return CMD_RET_USAGE;
}
if (net_lwip_eth_start() < 0)
return CMD_RET_FAILURE;
if (sntp_loop(eth_get_dev(), srvip) < 0)
return CMD_RET_FAILURE;
return CMD_RET_SUCCESS;
}
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