LXR uboot/net/sntp.c

   1/*
   2 * SNTP support driver
   3 *
   4 * Masami Komiya <mkomiya@sonare.it> 2005
   5 *
   6 */
   7
   8#include <common.h>
   9#include <command.h>
  10#include <dm.h>
  11#include <net.h>
  12#include <rtc.h>
  13
  14#include "sntp.h"
  15
  16#define SNTP_TIMEOUT 10000UL
  17
  18static int sntp_our_port;
  19
  20static void sntp_send(void)
  21{
  22        struct sntp_pkt_t pkt;
  23        int pktlen = SNTP_PACKET_LEN;
  24        int sport;
  25
  26        debug("%s\n", __func__);
  27
  28        memset(&pkt, 0, sizeof(pkt));
  29
  30        pkt.li = NTP_LI_NOLEAP;
  31        pkt.vn = NTP_VERSION;
  32        pkt.mode = NTP_MODE_CLIENT;
  33
  34        memcpy((char *)net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE,
  35               (char *)&pkt, pktlen);
  36
  37        sntp_our_port = 10000 + (get_timer(0) % 4096);
  38        sport = NTP_SERVICE_PORT;
  39
  40        net_send_udp_packet(net_server_ethaddr, net_ntp_server, sport,
  41                            sntp_our_port, pktlen);
  42}
  43
  44static void sntp_timeout_handler(void)
  45{
  46        puts("Timeout\n");
  47        net_set_state(NETLOOP_FAIL);
  48        return;
  49}
  50
  51static void sntp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
  52                         unsigned src, unsigned len)
  53{
  54#ifdef CONFIG_TIMESTAMP
  55        struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt;
  56        struct rtc_time tm;
  57        ulong seconds;
  58#endif
  59
  60        debug("%s\n", __func__);
  61
  62        if (dest != sntp_our_port)
  63                return;
  64
  65#ifdef CONFIG_TIMESTAMP
  66        /*
  67         * As the RTC's used in U-Boot support second resolution only
  68         * we simply ignore the sub-second field.
  69         */
  70        memcpy(&seconds, &rpktp->transmit_timestamp, sizeof(ulong));
  71
  72        rtc_to_tm(ntohl(seconds) - 2208988800UL + net_ntp_time_offset, &tm);
  73#if defined(CONFIG_CMD_DATE)
  74#  ifdef CONFIG_DM_RTC
  75        struct udevice *dev;
  76        int ret;
  77
  78        ret = uclass_get_device(UCLASS_RTC, 0, &dev);
  79        if (ret)
  80                printf("SNTP: cannot find RTC: err=%d\n", ret);
  81        else
  82                dm_rtc_set(dev, &tm);
  83#  else
  84        rtc_set(&tm);
  85#  endif
  86#endif
  87        printf("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n",
  88               tm.tm_year, tm.tm_mon, tm.tm_mday,
  89               tm.tm_hour, tm.tm_min, tm.tm_sec);
  90#endif
  91
  92        net_set_state(NETLOOP_SUCCESS);
  93}
  94
  95void sntp_start(void)
  96{
  97        debug("%s\n", __func__);
  98
  99        net_set_timeout_handler(SNTP_TIMEOUT, sntp_timeout_handler);
 100        net_set_udp_handler(sntp_handler);
 101        memset(net_server_ethaddr, 0, sizeof(net_server_ethaddr));
 102
 103        sntp_send();
 104}
 105