diff -r 86ebf18a029f -r 2c3ccdde3919 master/reg_request.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/master/reg_request.c	Wed Nov 14 22:12:57 2012 +0100
@@ -0,0 +1,132 @@
+/******************************************************************************
+ *
+ *  $Id$
+ *
+ *  Copyright (C) 2012  Florian Pose, Ingenieurgemeinschaft IgH
+ *
+ *  This file is part of the IgH EtherCAT Master.
+ *
+ *  The IgH EtherCAT Master is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License version 2, as
+ *  published by the Free Software Foundation.
+ *
+ *  The IgH EtherCAT Master is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+ *  Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with the IgH EtherCAT Master; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *  ---
+ *
+ *  The license mentioned above concerns the source code only. Using the
+ *  EtherCAT technology and brand is only permitted in compliance with the
+ *  industrial property and similar rights of Beckhoff Automation GmbH.
+ *
+ *****************************************************************************/
+
+/** \file
+ * Register request functions.
+ */
+
+/*****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/jiffies.h>
+#include <linux/slab.h>
+
+#include "reg_request.h"
+
+/*****************************************************************************/
+
+void ec_reg_request_clear_data(ec_reg_request_t *);
+
+/*****************************************************************************/
+
+/** Register request constructor.
+ */
+int ec_reg_request_init(
+        ec_reg_request_t *reg, /**< Register request. */
+        size_t size /**< Memory size. */
+        )
+{
+    if (!(reg->data = (uint8_t *) kmalloc(size, GFP_KERNEL))) {
+        EC_ERR("Failed to allocate %zu bytes of register memory.\n", size);
+        return -ENOMEM;
+    }
+
+    INIT_LIST_HEAD(&reg->list);
+    reg->mem_size = size;
+    memset(reg->data, 0x00, size);
+    reg->dir = EC_DIR_INVALID;
+    reg->address = 0;
+    reg->transfer_size = 0;
+    reg->state = EC_INT_REQUEST_INIT;
+    return 0;
+}
+
+/*****************************************************************************/
+
+/** Register request destructor.
+ */
+void ec_reg_request_clear(
+        ec_reg_request_t *reg /**< Register request. */
+        )
+{
+    if (reg->data) {
+        kfree(reg->data);
+    }
+}
+
+/*****************************************************************************
+ * Application interface.
+ ****************************************************************************/
+
+uint8_t *ecrt_reg_request_data(ec_reg_request_t *reg)
+{
+    return reg->data;
+}
+
+/*****************************************************************************/
+
+ec_request_state_t ecrt_reg_request_state(const ec_reg_request_t *reg)
+{
+   return ec_request_state_translation_table[reg->state];
+}
+
+/*****************************************************************************/
+
+void ecrt_reg_request_write(ec_reg_request_t *reg, uint16_t address,
+        size_t size)
+{
+    reg->dir = EC_DIR_OUTPUT;
+    reg->address = address;
+    reg->transfer_size = min(size, reg->mem_size);
+    reg->state = EC_INT_REQUEST_QUEUED;
+}
+
+/*****************************************************************************/
+
+void ecrt_reg_request_read(ec_reg_request_t *reg, uint16_t address,
+        size_t size)
+{
+    reg->dir = EC_DIR_INPUT;
+    reg->address = address;
+    reg->transfer_size = min(size, reg->mem_size);
+    reg->state = EC_INT_REQUEST_QUEUED;
+}
+
+/*****************************************************************************/
+
+/** \cond */
+
+EXPORT_SYMBOL(ecrt_reg_request_data);
+EXPORT_SYMBOL(ecrt_reg_request_state);
+EXPORT_SYMBOL(ecrt_reg_request_write);
+EXPORT_SYMBOL(ecrt_reg_request_read);
+
+/** \endcond */
+
+/*****************************************************************************/