Eric Lee / smarc-uboot

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net/sntp.c 2.05 KB
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d41ce506b   Eric Lee   Initial Release, ... 
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  /*
   * SNTP support driver
   *
   * Masami Komiya <mkomiya@sonare.it> 2005
   *
   */
  
  #include <common.h>
  #include <command.h>
  #include <dm.h>
  #include <net.h>
  #include <rtc.h>
  
  #include "sntp.h"
  
  #define SNTP_TIMEOUT 10000UL
  
  static int sntp_our_port;
  
  static void sntp_send(void)
  {
  	struct sntp_pkt_t pkt;
  	int pktlen = SNTP_PACKET_LEN;
  	int sport;
  
  	debug("%s
  ", __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
  ");
  	net_set_state(NETLOOP_FAIL);
  	return;
  }
  
  static void sntp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
  			 unsigned src, unsigned len)
  {
  #ifdef CONFIG_TIMESTAMP
  	struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt;
  	struct rtc_time tm;
  	ulong seconds;
  #endif
  
  	debug("%s
  ", __func__);
  
  	if (dest != sntp_our_port)
  		return;
  
  #ifdef CONFIG_TIMESTAMP
  	/*
  	 * 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);
  #if defined(CONFIG_CMD_DATE)
  #  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
  ", ret);
  	else
  		dm_rtc_set(dev, &tm);
  #  else
  	rtc_set(&tm);
  #  endif
  #endif
  	printf("Date: %4d-%02d-%02d Time: %2d:%02d:%02d
  ",
  	       tm.tm_year, tm.tm_mon, tm.tm_mday,
  	       tm.tm_hour, tm.tm_min, tm.tm_sec);
  #endif
  
  	net_set_state(NETLOOP_SUCCESS);
  }
  
  void sntp_start(void)
  {
  	debug("%s
  ", __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();
  }