1 files changed, 106 insertions, 0 deletions
diff --git a/gps/gnsspps/timepps.h b/gps/gnsspps/timepps.h
new file mode 100644
index 0000000..fe0d8f0
--- /dev/null
+++ b/gps/gnsspps/timepps.h
@@ -0,0 +1,106 @@
+/* Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundatoin, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <linux/types.h>
+#include <linux/pps.h>
+
+#ifndef _TIMEPPS_H
+#define _TIMEPPS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+/* time of assert event */
+typedef struct  timespec pps_info;
+/* represents pps source */
+typedef int pps_handle;
+
+ /* Open the PPS source */
+static __inline int pps_create(int source, pps_handle *handle)
+{
+   int ret;
+   struct pps_kparams dummy;
+
+   if (!handle)
+   {
+      errno = EINVAL;
+      return -1;
+   }
+   /* check if current device is valid pps */
+   ret = ioctl(source, PPS_GETPARAMS, &dummy);
+   if (ret)
+   {
+      errno = EOPNOTSUPP;
+      return -1;
+   }
+   *handle = source;
+
+   return 0;
+}
+/* close the pps source */
+static __inline int pps_destroy(pps_handle handle)
+{
+   return close(handle);
+}
+/*reads timestamp from pps device*/
+static __inline int pps_fetch(pps_handle handle, const int tsformat,
+                              pps_info *ppsinfobuf,
+                              const struct timespec *timeout)
+{
+   struct pps_fdata fdata;
+   int ret;
+
+   if (tsformat != PPS_TSFMT_TSPEC)
+   {
+      errno = EINVAL;
+      return -1;
+   }
+   if (timeout)
+   {
+      fdata.timeout.sec = timeout->tv_sec;
+      fdata.timeout.nsec = timeout->tv_nsec;
+      fdata.timeout.flags = ~PPS_TIME_INVALID;
+   }
+   else
+   {
+      fdata.timeout.flags = PPS_TIME_INVALID;
+   }
+   ret = ioctl(handle, PPS_FETCH, &fdata);
+
+   ppsinfobuf->tv_sec = fdata.info.assert_tu.sec;
+   ppsinfobuf->tv_nsec = fdata.info.assert_tu.nsec;
+
+   return ret;
+}
+
+#ifdef __cplusplus
+}
+#endif
+#endif