diff --git a/userspace/tools/wr_irig.c b/userspace/tools/wr_irig.c
new file mode 100644
index 0000000000000000000000000000000000000000..32317bbdde463e8f53a397b07aab5765c1ba220d
--- /dev/null
+++ b/userspace/tools/wr_irig.c
@@ -0,0 +1,199 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <libwr/wrs-msg.h>
+#include "wr_irig.h"
+
+static int irig_get_time(struct irig_slave *irig, struct irig_time *t)
+{
+ uint32_t tod = irig->TOD;
+ uint32_t sec_raw = (tod & IRIG_SLAVE_TOD_SECONDS_MASK) >> IRIG_SLAVE_TOD_SECONDS_SHIFT;
+ uint32_t min_raw = (tod & IRIG_SLAVE_TOD_MINUTES_MASK) >> IRIG_SLAVE_TOD_MINUTES_SHIFT;
+ uint32_t hr_raw = (tod & IRIG_SLAVE_TOD_HOURS_MASK) >> IRIG_SLAVE_TOD_HOURS_SHIFT;
+
+ uint32_t valid = (tod & IRIG_SLAVE_TOD_VALID);
+
+ uint32_t secs = (sec_raw & 0x0f);
+ uint32_t mins = (min_raw & 0x0f);
+ uint32_t hrs = (hr_raw & 0x0f);
+
+ int i;
+
+ for (i = 0; i < 3; i++){
+ if ((sec_raw >> 5) & (1 << i)) {
+ secs += 10*(1<<i);
+ }
+
+ if (((min_raw & 0xe0) >> 5) & (1 << i)) {
+ mins += 10*(1<<i);
+ }
+
+ if(((hr_raw & 0x60) >> 5) & 1<<i) {
+ hrs += 10*(1<<i);
+ }
+ }
+
+ if (valid) {
+ t->sec = secs;
+ t->min = mins;
+ t->hour = hrs;
+ return 0;
+ }
+
+ return -1;
+}
+
+static int irig_get_date(struct irig_slave *irig, struct irig_time *t){
+
+ uint32_t date = irig->DATE;
+ uint32_t day_raw = (date & IRIG_SLAVE_DATE_DAYS_MASK) >> IRIG_SLAVE_DATE_DAYS_SHIFT;
+ uint32_t yr_raw = (date & IRIG_SLAVE_DATE_YEARS_MASK) >> IRIG_SLAVE_DATE_YEARS_SHIFT;
+ uint32_t valid = (date & IRIG_SLAVE_DATE_VALID);
+
+ uint32_t days = (day_raw & 0x0f);
+ uint32_t yrs = (yr_raw & 0x0f);
+ uint32_t mon = 0;
+
+ const int m_to_d[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304,
+ 334};
+ int i = 0;
+ for (i = 0; i < 6; i++) {
+ if ((day_raw >> 5) & 1 << i) {
+ if (i >= 4) {
+ days += 100 * (1 << (i - 4));
+ } else {
+ days += 10 * (1 << i);
+ }
+ }
+ }
+
+ //fixme
+ days -= 1;
+
+ for (i = 0; i < 4; i++) {
+ if ((yr_raw >> 5) & (1 << i)){
+ yrs += 10 * (1 << i);
+ }
+ }
+
+ yrs += 2000;
+
+ for (i = 0; i < 11; i++){
+ if (days >= m_to_d[i] && days < m_to_d[i + 1]) {
+ mon = i+1;
+ days -= m_to_d[i];
+ }
+ }
+
+ if (valid){
+ t->day = days;
+ t->mon = mon;
+ t->year = yrs;
+ return 0;
+ }
+ return -1;
+}
+
+static int irig_get_sbs(struct irig_slave *irig, struct irig_time *t)
+{
+ uint32_t sbs = irig->SBS;
+ uint32_t valid = (sbs & IRIG_SLAVE_SBS_VALID);
+ uint32_t hrs;
+ uint32_t mins;
+ uint32_t secs;
+
+ sbs = (sbs & IRIG_SLAVE_SBS_SBS_MASK) >> IRIG_SLAVE_SBS_SBS_SHIFT;
+
+ hrs = sbs / 3600;
+ mins = (sbs / 60) % 60;
+ secs = sbs % 60;
+
+ if (valid) {
+ t->sec = secs;
+ t->min = mins;
+ t->hour = hrs;
+ return 0;
+ }
+ return -1;
+}
+
+static int64_t irig_time_to_tai(struct irig_time *t)
+{
+ short month, year;
+ int64_t result;
+ const int m_to_d[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304,
+ 334 };
+
+ month = t->mon;
+ year = t->year + month / 12 + 1900;
+ month %= 12;
+ if (month < 0) {
+ year -= 1;
+ month += 12;
+ }
+ result = (year - 1970) * 365 + (year - 1969) / 4 + m_to_d[month];
+ result = (year - 1970) * 365 + m_to_d[month];
+
+ if (month <= 1)
+ year -= 1;
+
+ result += (year - 1968) / 4;
+ result -= (year - 1900) / 100;
+ result += (year - 1600) / 400;
+ result += t->day;
+ result -= 1;
+ result *= 24;
+ result += t->hour;
+ result *= 60;
+ result += t->min;
+ result *= 60;
+ result += t->sec;
+
+ return result;
+}
+
+int irig_read_tai(struct wr_irig *wr_irig, int64_t *t_out)
+{
+ struct irig_time t0;
+ struct irig_time t1;
+
+ if (irig_get_time(wr_irig->irig, &(wr_irig->t)) < 0){
+ return -1;
+ }
+ if (irig_get_date(wr_irig->irig, &(wr_irig->t)) < 0){
+ return -1;
+ }
+ if (irig_get_sbs(wr_irig->irig, &t1) < 0){
+ return -1;
+ }
+ //sanity check, time vs sbs
+ if ((wr_irig->t.sec != t1.sec)
+ || (wr_irig->t.min != t1.min)
+ || (wr_irig->t.hour != t1.hour)
+ ) {
+ return -1;
+ }
+
+ printf("IRIG time: %d/%d/%d %02d:%02d:%02d\n",
+ wr_irig->t.year, wr_irig->t.mon, wr_irig->t.day,
+ wr_irig->t.hour, wr_irig->t.min, wr_irig->t.sec);
+
+ t0 = wr_irig->t;
+ t0.year -= 1900;
+ t0.mon -= 1;
+
+ *t_out = irig_time_to_tai(&t0);
+ return 0;
+}
+
+int irig_enable(struct wr_irig *wr_irig, int en) {
+
+ wr_irig->irig->CR = (en ? IRIG_SLAVE_CR_ENABLE : 0);
+ return 0;
+}
diff --git a/userspace/tools/wr_irig.h b/userspace/tools/wr_irig.h
new file mode 100644
index 0000000000000000000000000000000000000000..9576089e38c1cd630507bfde7197b840e67aae12
--- /dev/null
+++ b/userspace/tools/wr_irig.h
@@ -0,0 +1,24 @@
+#ifndef __WR_IRIG_H
+#define __WR_IRIG_H
+
+#include "../../kernel/wbgen-regs/irig_slave_regs.h"
+
+struct irig_time{
+ int year;
+ int mon;
+ int day;
+ int hour;
+ int min;
+ int sec;
+ int tos;
+};
+
+struct wr_irig{
+ struct irig_slave *irig;
+ struct irig_time t;
+};
+
+int irig_enable(struct wr_irig *wr_irig, int en);
+int irig_read_tai(struct wr_irig *wr_irig, int64_t *t_out);
+
+#endif