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/*
* SNTP support driver
*
* Masami Komiya <mkomiya@sonare.it> 2005
*
*/
#include <common.h>
#include <command.h>
#include <dm.h>
#include <log.h>
#include <net.h>
#include <rtc.h>
#include <net/sntp.h>
#define SNTP_TIMEOUT 10000UL
static int sntp_our_port;
/* NTP server IP address */
struct in_addr net_ntp_server;
/* offset time from UTC */
int net_ntp_time_offset;
static void sntp_send(void)
{
struct sntp_pkt_t pkt;
int pktlen = SNTP_PACKET_LEN;
int sport;
debug("%s\n", __func__);
memset(&pkt, 0, sizeof(pkt));
pkt.li = NTP_LI_NOLEAP;
pkt.vn = NTP_VERSION;
pkt.mode = NTP_MODE_CLIENT;
memcpy((char *)net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE,
(char *)&pkt, pktlen);
sntp_our_port = 10000 + (get_timer(0) % 4096);
sport = NTP_SERVICE_PORT;
net_send_udp_packet(net_server_ethaddr, net_ntp_server, sport,
sntp_our_port, pktlen);
}
static void sntp_timeout_handler(void)
{
puts("Timeout\n");
net_set_state(NETLOOP_FAIL);
return;
}
static void sntp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
unsigned src, unsigned len)
{
struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt;
struct rtc_time tm;
ulong seconds;
debug("%s\n", __func__);
if (dest != sntp_our_port)
return;
/*
* As the RTC's used in U-Boot support second resolution only
* we simply ignore the sub-second field.
*/
memcpy(&seconds, &rpktp->transmit_timestamp, sizeof(ulong));
rtc_to_tm(ntohl(seconds) - 2208988800UL + net_ntp_time_offset, &tm);
#ifdef CONFIG_DM_RTC
struct udevice *dev;
int ret;
ret = uclass_get_device(UCLASS_RTC, 0, &dev);
if (ret)
printf("SNTP: cannot find RTC: err=%d\n", ret);
else
dm_rtc_set(dev, &tm);
#elif defined(CONFIG_CMD_DATE)
rtc_set(&tm);
#endif
printf("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n",
tm.tm_year, tm.tm_mon, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec);
net_set_state(NETLOOP_SUCCESS);
}
/*
* SNTP:
*
* Prerequisites: - own ethernet address
* - own IP address
* We want: - network time
* Next step: none
*/
int sntp_prereq(void *data)
{
if (net_ntp_server.s_addr == 0) {
puts("*** ERROR: NTP server address not given\n");
return 1;
}
return 0;
}
int sntp_start(void *data)
{
debug("%s\n", __func__);
net_set_timeout_handler(SNTP_TIMEOUT, sntp_timeout_handler);
net_set_udp_handler(sntp_handler);
memset(net_server_ethaddr, 0, sizeof(net_server_ethaddr));
sntp_send();
return 0;
}
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