2007-05-29 Joel Sherrill <joel.sherrill@OARcorp.com>

	* sapi/Makefile.am, sapi/include/rtems/io.h, sapi/src/io.c: Split into
	one function per file execpt io.c which contains required
	initialization methods.
	* sapi/src/ioclose.c, sapi/src/iocontrol.c, sapi/src/iodata.c,
	sapi/src/ioinitialize.c, sapi/src/ioopen.c, sapi/src/ioread.c,
	sapi/src/ioregisterdriver.c, sapi/src/iounregisterdriver.c,
	sapi/src/iowrite.c: New files.

1 files changed, 94 insertions, 0 deletions

diff --git a/cpukit/sapi/src/ioregisterdriver.c b/cpukit/sapi/src/ioregisterdriver.c
new file mode 100644
index 0000000000..45d5ffe97b
--- /dev/null
+++ b/cpukit/sapi/src/ioregisterdriver.c
@@ -0,0 +1,94 @@
+/*
+ *  Input/Output Manager - Dynamically Register Device Driver
+ *
+ *  COPYRIGHT (c) 1989-2007.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/system.h>
+#include <rtems/io.h>
+
+/*
+ *  rtems_io_register_driver
+ *
+ *  Register a driver into the device driver table.
+ *
+ *  Input Paramters:
+ *    major            - device major number (0 means allocate
+ *                       a number)
+ *    driver_table     - driver callout function table
+ *    registered_major - the major number which is registered
+ *
+ *  Output Parameters:
+ *    RTEMS_SUCCESSFUL - if successful
+ *    error code       - if unsuccessful
+ */
+
+rtems_status_code rtems_io_register_driver(
+  rtems_device_major_number   major,
+  rtems_driver_address_table *driver_table,
+  rtems_device_major_number  *registered_major
+)
+{
+
+  /*
+   *  Validate the pointer data and contents passed in
+   */
+  if ( !driver_table )
+    return RTEMS_INVALID_ADDRESS;
+
+  if ( !registered_major )
+    return RTEMS_INVALID_ADDRESS;
+
+  if ( !driver_table->initialization_entry && !driver_table->open_entry )
+    return RTEMS_INVALID_ADDRESS;
+
+  *registered_major = 0;
+
+  /*
+   *  The requested major number is higher than what is configured.
+   */
+  if ( major >= _IO_Number_of_drivers )
+    return RTEMS_INVALID_NUMBER;
+
+  /*
+   * Test for initialise/open being present to indicate the driver slot is
+   * in use.
+   */
+
+  if ( major == 0 ) {
+    boolean found = FALSE;
+    for ( major = _IO_Number_of_drivers - 1 ; major ; major-- ) {
+      if ( !_IO_Driver_address_table[major].initialization_entry &&
+           !_IO_Driver_address_table[major].open_entry ) {
+        found = TRUE;
+        break;
+      }
+    }
+
+    if ( !found )
+      return RTEMS_TOO_MANY;
+  }
+
+  if ( _IO_Driver_address_table[major].initialization_entry ||
+       _IO_Driver_address_table[major].open_entry )
+    return RTEMS_RESOURCE_IN_USE;
+
+
+  _IO_Driver_address_table[major] = *driver_table;
+  *registered_major               = major;
+
+  rtems_io_initialize( major, 0, NULL );
+
+  return RTEMS_SUCCESSFUL;
+}