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 <log.h> 12#include <net.h> 13#include <rtc.h> 14 15#include <net/sntp.h> 16 17#define SNTP_TIMEOUT 10000UL 18 19static int sntp_our_port; 20 21/* NTP server IP address */ 22struct in_addr net_ntp_server; 23/* offset time from UTC */ 24int net_ntp_time_offset; 25 26static void sntp_send(void) 27{ 28 struct sntp_pkt_t pkt; 29 int pktlen = SNTP_PACKET_LEN; 30 int sport; 31 32 debug("%s\n", __func__); 33 34 memset(&pkt, 0, sizeof(pkt)); 35 36 pkt.li = NTP_LI_NOLEAP; 37 pkt.vn = NTP_VERSION; 38 pkt.mode = NTP_MODE_CLIENT; 39 40 memcpy((char *)net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE, 41 (char *)&pkt, pktlen); 42 43 sntp_our_port = 10000 + (get_timer(0) % 4096); 44 sport = NTP_SERVICE_PORT; 45 46 net_send_udp_packet(net_server_ethaddr, net_ntp_server, sport, 47 sntp_our_port, pktlen); 48} 49 50static void sntp_timeout_handler(void) 51{ 52 puts("Timeout\n"); 53 net_set_state(NETLOOP_FAIL); 54 return; 55} 56 57static void sntp_handler(uchar *pkt, unsigned dest, struct in_addr sip, 58 unsigned src, unsigned len) 59{ 60 struct sntp_pkt_t *rpktp = (struct sntp_pkt_t *)pkt; 61 struct rtc_time tm; 62 ulong seconds; 63 64 debug("%s\n", __func__); 65 66 if (dest != sntp_our_port) 67 return; 68 69 /* 70 * As the RTC's used in U-Boot support second resolution only 71 * we simply ignore the sub-second field. 72 */ 73 memcpy(&seconds, &rpktp->transmit_timestamp, sizeof(ulong)); 74 75 rtc_to_tm(ntohl(seconds) - 2208988800UL + net_ntp_time_offset, &tm); 76#ifdef CONFIG_DM_RTC 77 struct udevice *dev; 78 int ret; 79 80 ret = uclass_get_device(UCLASS_RTC, 0, &dev); 81 if (ret) 82 printf("SNTP: cannot find RTC: err=%d\n", ret); 83 else 84 dm_rtc_set(dev, &tm); 85#elif defined(CONFIG_CMD_DATE) 86 rtc_set(&tm); 87#endif 88 printf("Date: %4d-%02d-%02d Time: %2d:%02d:%02d\n", 89 tm.tm_year, tm.tm_mon, tm.tm_mday, 90 tm.tm_hour, tm.tm_min, tm.tm_sec); 91 92 net_set_state(NETLOOP_SUCCESS); 93} 94 95/* 96 * SNTP: 97 * 98 * Prerequisites: - own ethernet address 99 * - own IP address 100 * We want: - network time 101 * Next step: none 102 */ 103int sntp_prereq(void *data) 104{ 105 if (net_ntp_server.s_addr == 0) { 106 puts("*** ERROR: NTP server address not given\n"); 107 return 1; 108 } 109 110 return 0; 111} 112 113int sntp_start(void *data) 114{ 115 debug("%s\n", __func__); 116 117 net_set_timeout_handler(SNTP_TIMEOUT, sntp_timeout_handler); 118 net_set_udp_handler(sntp_handler); 119 memset(net_server_ethaddr, 0, sizeof(net_server_ethaddr)); 120 121 sntp_send(); 122 123 return 0; 124} 125