Changeset 923b2eba in mainline for uspace/drv/time/cmos-rtc/cmos-rtc.c

Timestamp:

2012-04-03T08:10:43Z (12 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

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

Children:

2a5171db

Parents:

8d2963d

Message:

rtc: add the rtc_open() callback

File:

• uspace/drv/time/cmos-rtc/cmos-rtc.c (modified) (6 diffs)

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

@@ -49 +49 @@
 
 #define REG_COUNT 2
+
+#define RTC_FROM_FNODE(fnode)  ((rtc_t *) ((fnode)->dev->driver_data))
 
 typedef struct rtc {
@@ -61 +63 @@
         /** The I/O port used to access the CMOS registers */
         ioport8_t *port;
+        /** true if a client is connected to the device */
+        bool client_connected;
 } rtc_t;
 
@@ -81 +85 @@
 static void
 rtc_dev_cleanup(rtc_t *rtc);
+
+static int
+rtc_open(ddf_fun_t *fun);
 
 
@@ -109 +116 @@
         ddf_log_init(NAME, LVL_ERROR);
 
-        rtc_dev_ops.open = NULL; /* XXX */
+        rtc_dev_ops.open = rtc_open;
         rtc_dev_ops.close = NULL; /* XXX */
 
@@ -302 +309 @@
         ddf_fun_add_to_category(fun, "clock");
 
+        rtc->client_connected = false;
+
         ddf_msg(LVL_NOTE, "Device %s successfully initialized",
             dev->name);
@@ -315 +324 @@
 }
 
+/** Open the device
+ *
+ * @param fun   The function node
+ *
+ * @return  EOK on success or a negative error code
+ */
+static int
+rtc_open(ddf_fun_t *fun)
+{
+        int rc;
+        rtc_t *rtc = RTC_FROM_FNODE(fun);
+
+        fibril_mutex_lock(&rtc->mutex);
+
+        if (rtc->client_connected)
+                rc = EBUSY;
+        else {
+                rc = EOK;
+                rtc->client_connected = true;
+        }
+
+        fibril_mutex_unlock(&rtc->mutex);
+        return rc;
+}
+
 int
 main(int argc, char **argv)