Changeset f30ee571 in mainline

Timestamp:

2012-04-03T09:15:30Z (12 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

3b79ba5

Parents:

010341d

Message:

rtc: add the rtc_update_in_progress() function

File:

• uspace/drv/time/cmos-rtc/cmos-rtc.c (modified) (5 diffs)

uspace/drv/time/cmos-rtc/cmos-rtc.c

@@ -38 +38 @@
 #include <errno.h>
 #include <ddi.h>
+#include <libarch/ddi.h>
 #include <stdio.h>
 #include <ddf/driver.h>
@@ -45 +46 @@
 #include <device/hw_res.h>
 #include <devman.h>
+
+#include "cmos-regs.h"
 
 #define NAME "cmos-rtc"
@@ -76 +79 @@
 static int  rtc_open(ddf_fun_t *fun);
 static void rtc_close(ddf_fun_t *fun);
+static bool rtc_update_in_progress(rtc_t *rtc);
 
 
@@ -218 +222 @@
 }
 
+/** Check if an update is in progress
+ *
+ * @param rtc  The rtc device
+ *
+ * @return  true if an update is in progress, false otherwise
+ */
+static bool
+rtc_update_in_progress(rtc_t *rtc)
+{
+        pio_write_8(rtc->port, RTC_UPDATE);
+        return pio_read_8(rtc->port + 1) & RTC_MASK_UPDATE;
+}
+
 /** Read the current time from the CMOS
  *
@@ -228 +245 @@
 rtc_time_get(ddf_fun_t *fun, struct tm *t)
 {
+        rtc_t *rtc = RTC_FROM_FNODE(fun);
+
+        fibril_mutex_lock(&rtc->mutex);
+
+        while (rtc_update_in_progress(rtc));
+
+        fibril_mutex_unlock(&rtc->mutex);
         return EOK;
 }