Changeset 25a7e11d in mainline for uspace/srv/drivers/serial/serial.c

Timestamp:

2010-04-30T14:13:41Z (15 years ago)

Author:

Lenka Trochtova <trochtova.lenka@…>

Branches:

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

Children:

f658458

Parents:

dafe675

Message:

backup (unstable)

File:

• uspace/srv/drivers/serial/serial.c (modified) (2 diffs)

uspace/srv/drivers/serial/serial.c

@@ -269 +269 @@
         int res;
         // enable interrupt globally    
-        printf(NAME ": call  enable_interrupt\n");
         if (EOK != (res = interrupt_enable(data->irq))) {
                 return res;
@@ -385 +384 @@
 }
 
+/** Open the device.
+ * 
+ * This is a callback function called when a client tries to connect to the device.
+ * 
+ * @param dev the device.
+ */
+static int serial_open(device_t *dev)
+{
+        serial_dev_data_t *data = (serial_dev_data_t *)dev->driver_data;
+        int res;
+        
+        fibril_mutex_lock(&data->mutex);        
+        
+        if (data->client_connected) {
+                res = ELIMIT;
+        } else {
+                res = EOK;
+                data->client_connected = true;
+        }
+        
+        fibril_mutex_unlock(&data->mutex);
+
+        return res;
+}
+
+/** Close the device.
+ * 
+ *  This is a callback function called when a client tries to disconnect from the device.
+ * 
+ * @param dev the device. 
+ */
+static void serial_close(device_t *dev)
+{
+        serial_dev_data_t *data = (serial_dev_data_t *)dev->driver_data;
+        
+        fibril_mutex_lock(&data->mutex);
+        
+        assert(data->client_connected); 
+        
+        data->client_connected = false;
+        buf_clear(&data->input_buffer);
+        
+        fibril_mutex_unlock(&data->mutex);       
+}
+
+/** Initialize the serial port driver.
+ * 
+ * Initialize class structures with callback methods for handling 
+ * client requests to the serial port devices.
+ */
 static void serial_init() 
 {
         // TODO
         serial_dev_class.id = 0;
+        serial_dev_class.open = &serial_open;
+        serial_dev_class.close = &serial_close; 
 }