diff --git a/ddbridge/Kbuild b/ddbridge/Kbuild
index 41f3f6f..95a61bd 100644
--- a/ddbridge/Kbuild
+++ b/ddbridge/Kbuild
@@ -1,7 +1,7 @@
 EXTRA_CFLAGS += -DCONFIG_DVB_CXD2843 -DCONFIG_DVB_LNBP21 -DCONFIG_DVB_STV090x -DCONFIG_DVB_STV6110x -DCONFIG_DVB_DRXK -DCONFIG_DVB_STV0910 -DCONFIG_DVB_STV6111 -DCONFIG_DVB_LNBH25 -DCONFIG_DVB_MXL5XX
 
-ddbridge-objs := ddbridge-main.o ddbridge-core.o ddbridge-hw.o ddbridge-i2c.o ddbridge-modulator.o ddbridge-ns.o
-octonet-objs := octonet-main.o ddbridge-core.o ddbridge-hw.o ddbridge-i2c.o ddbridge-modulator.o ddbridge-ns.o
+ddbridge-objs := ddbridge-main.o ddbridge-core.o ddbridge-hw.o ddbridge-i2c.o ddbridge-io.o ddbridge-modulator.o ddbridge-ns.o
+octonet-objs := octonet-main.o ddbridge-core.o ddbridge-hw.o ddbridge-i2c.o ddbridge-io.o ddbridge-modulator.o ddbridge-ns.o
 
 obj-$(CONFIG_DVB_DDBRIDGE) += ddbridge.o
 obj-$(CONFIG_DVB_OCTONET) += octonet.o
diff --git a/ddbridge/ddbridge-core.c b/ddbridge/ddbridge-core.c
index 6acdbbe..645eec5 100644
--- a/ddbridge/ddbridge-core.c
+++ b/ddbridge/ddbridge-core.c
@@ -41,6 +41,7 @@
 #include "ddbridge.h"
 #include "ddbridge-regs.h"
 #include "ddbridge-hw.h"
+#include "ddbridge-io.h"
 
 #include "tda18271c2dd.h"
 #include "stv6110x.h"
diff --git a/ddbridge/ddbridge-i2c.c b/ddbridge/ddbridge-i2c.c
index 799f799..76c6241 100644
--- a/ddbridge/ddbridge-i2c.c
+++ b/ddbridge/ddbridge-i2c.c
@@ -39,6 +39,7 @@
 
 #include "ddbridge.h"
 #include "ddbridge-regs.h"
+#include "ddbridge-io.h"
 
 /******************************************************************************/
 
diff --git a/ddbridge/ddbridge-io.c b/ddbridge/ddbridge-io.c
new file mode 100644
index 0000000..607ab77
--- /dev/null
+++ b/ddbridge/ddbridge-io.c
@@ -0,0 +1,177 @@
+/*
+ * ddbridge-io.h: Digital Devices bridge I/O (inline) functions
+ *
+ * Copyright (C) 2010-2017 Digital Devices GmbH
+ *                         Ralph Metzler <rjkm@metzlerbros.de>
+ *                         Marcus Metzler <mocm@metzlerbros.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 only, as published by the Free Software Foundation.
+ *
+ * This program 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.
+ *
+ */
+
+#include <linux/io.h>
+
+#include "ddbridge.h"
+#include "ddbridge-io.h"
+
+/******************************************************************************/
+
+u32 ddblreadl(struct ddb_link *link, u32 adr)
+{
+	if (unlikely(link->nr)) {
+		unsigned long flags;
+		u32 val;
+
+		spin_lock_irqsave(&link->lock, flags);
+		gtlw(link);
+		ddbwritel0(link, adr & 0xfffc, link->regs + 0x14);
+		ddbwritel0(link, 3, link->regs + 0x10);
+		gtlw(link);
+		val = ddbreadl0(link, link->regs + 0x1c);
+		spin_unlock_irqrestore(&link->lock, flags);
+		return val;
+	}
+	return readl((char *) (link->dev->regs + (adr)));
+}
+
+void ddblwritel(struct ddb_link *link, u32 val, u32 adr)
+{
+	if (unlikely(link->nr)) {
+		unsigned long flags;
+
+		spin_lock_irqsave(&link->lock, flags);
+		gtlw(link);
+		ddbwritel0(link, 0xf0000 | (adr & 0xfffc), link->regs + 0x14);
+		ddbwritel0(link, val, link->regs + 0x18);
+		ddbwritel0(link, 1, link->regs + 0x10);
+		spin_unlock_irqrestore(&link->lock, flags);
+		return;
+	}
+	writel(val, (char *) (link->dev->regs + (adr)));
+}
+
+u32 ddbreadl(struct ddb *dev, u32 adr)
+{
+	if (unlikely(adr & 0xf0000000)) {
+		unsigned long flags;
+		u32 val, l = (adr >> DDB_LINK_SHIFT);
+		struct ddb_link *link = &dev->link[l];
+
+		spin_lock_irqsave(&link->lock, flags);
+		gtlw(link);
+		ddbwritel0(link, adr & 0xfffc, link->regs + 0x14);
+		ddbwritel0(link, 3, link->regs + 0x10);
+		gtlw(link);
+		val = ddbreadl0(link, link->regs + 0x1c);
+		spin_unlock_irqrestore(&link->lock, flags);
+		return val;
+	}
+	return readl((char *) (dev->regs + (adr)));
+}
+
+void ddbwritel(struct ddb *dev, u32 val, u32 adr)
+{
+	if (unlikely(adr & 0xf0000000)) {
+		unsigned long flags;
+		u32 l = (adr >> DDB_LINK_SHIFT);
+		struct ddb_link *link = &dev->link[l];
+
+		spin_lock_irqsave(&link->lock, flags);
+		gtlw(link);
+		ddbwritel0(link, 0xf0000 | (adr & 0xfffc), link->regs + 0x14);
+		ddbwritel0(link, val, link->regs + 0x18);
+		ddbwritel0(link, 1, link->regs + 0x10);
+		spin_unlock_irqrestore(&link->lock, flags);
+		return;
+	}
+	writel(val, (char *) (dev->regs + (adr)));
+}
+
+static void gtlcpyto(struct ddb *dev, u32 adr, const u8 *buf,
+		     unsigned int count)
+{
+	u32 val = 0, p = adr;
+	u32 aa = p & 3;
+
+	if (aa) {
+		while (p & 3 && count) {
+			val >>= 8;
+			val |= *buf << 24;
+			p++;
+			buf++;
+			count--;
+		}
+		ddbwritel(dev, val, adr);
+	}
+	while (count >= 4) {
+		val = buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
+		ddbwritel(dev, val, p);
+		p += 4;
+		buf += 4;
+		count -= 4;
+	}
+	if (count) {
+		val = buf[0];
+		if (count > 1)
+			val |= buf[1] << 8;
+		if (count > 2)
+			val |= buf[2] << 16;
+		ddbwritel(dev, val, p);
+	}
+}
+
+static void gtlcpyfrom(struct ddb *dev, u8 *buf, u32 adr, long count)
+{
+	u32 val = 0, p = adr;
+	u32 a = p & 3;
+
+	if (a) {
+		val = ddbreadl(dev, p) >> (8 * a);
+		while (p & 3 && count) {
+			*buf = val & 0xff;
+			val >>= 8;
+			p++;
+			buf++;
+			count--;
+		}
+	}
+	while (count >= 4) {
+		val = ddbreadl(dev, p);
+		buf[0] = val & 0xff;
+		buf[1] = (val >> 8) & 0xff;
+		buf[2] = (val >> 16) & 0xff;
+		buf[3] = (val >> 24) & 0xff;
+		p += 4;
+		buf += 4;
+		count -= 4;
+	}
+	if (count) {
+		val = ddbreadl(dev, p);
+		buf[0] = val & 0xff;
+		if (count > 1)
+			buf[1] = (val >> 8) & 0xff;
+		if (count > 2)
+			buf[2] = (val >> 16) & 0xff;
+	}
+}
+
+void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count)
+{
+	if (unlikely(adr & 0xf0000000))
+		return gtlcpyto(dev, adr, src, count);
+	return memcpy_toio((char *) (dev->regs + adr), src, count);
+}
+
+void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count)
+{
+	if (unlikely(adr & 0xf0000000))
+		return gtlcpyfrom(dev, dst, adr, count);
+	return memcpy_fromio(dst, (char *) (dev->regs + adr), count);
+}
diff --git a/ddbridge/ddbridge-io.h b/ddbridge/ddbridge-io.h
new file mode 100644
index 0000000..ce83537
--- /dev/null
+++ b/ddbridge/ddbridge-io.h
@@ -0,0 +1,68 @@
+/*
+ * ddbridge-io.h: Digital Devices bridge I/O (inline) functions
+ *
+ * Copyright (C) 2010-2017 Digital Devices GmbH
+ *                         Ralph Metzler <rjkm@metzlerbros.de>
+ *                         Marcus Metzler <mocm@metzlerbros.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 only, as published by the Free Software Foundation.
+ *
+ * This program 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.
+ *
+ */
+
+#ifndef __DDBRIDGE_IO_H__
+#define __DDBRIDGE_IO_H__
+
+#include <linux/io.h>
+
+#include "ddbridge.h"
+
+/******************************************************************************/
+
+static inline void ddbwriteb(struct ddb *dev, u32 val, u32 adr)
+{
+	writeb(val, (char *) (dev->regs + (adr)));
+}
+
+static inline u32 ddbreadb(struct ddb *dev, u32 adr)
+{
+	return readb((char *) (dev->regs + (adr)));
+}
+
+static inline void ddbwritel0(struct ddb_link *link, u32 val, u32 adr)
+{
+	writel(val, (char *) (link->dev->regs + (adr)));
+}
+
+static inline u32 ddbreadl0(struct ddb_link *link, u32 adr)
+{
+	return readl((char *) (link->dev->regs + (adr)));
+}
+
+static inline void gtlw(struct ddb_link *link)
+{
+	while (1 & ddbreadl0(link, link->regs + 0x10))
+		;
+}
+
+/******************************************************************************/
+
+u32 ddblreadl(struct ddb_link *link, u32 adr);
+void ddblwritel(struct ddb_link *link, u32 val, u32 adr);
+u32 ddbreadl(struct ddb *dev, u32 adr);
+void ddbwritel(struct ddb *dev, u32 val, u32 adr);
+void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count);
+void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count);
+
+/******************************************************************************/
+
+#define ddbmemset(_dev, _adr, _val, _count) \
+	memset_io((char *) (_dev->regs + (_adr)), (_val), (_count))
+
+#endif /* __DDBRIDGE_IO_H__ */
diff --git a/ddbridge/ddbridge-main.c b/ddbridge/ddbridge-main.c
index bba58cc..4db1263 100644
--- a/ddbridge/ddbridge-main.c
+++ b/ddbridge/ddbridge-main.c
@@ -30,6 +30,7 @@
 #include "ddbridge.h"
 #include "ddbridge-regs.h"
 #include "ddbridge-hw.h"
+#include "ddbridge-io.h"
 
 static struct workqueue_struct *ddb_wq;
 
diff --git a/ddbridge/ddbridge-modulator.c b/ddbridge/ddbridge-modulator.c
index 90a4062..69e6eca 100644
--- a/ddbridge/ddbridge-modulator.c
+++ b/ddbridge/ddbridge-modulator.c
@@ -25,6 +25,7 @@
 
 #include "ddbridge.h"
 #include "ddbridge-regs.h"
+#include "ddbridge-io.h"
 
 #include <linux/dvb/mod.h>
 
diff --git a/ddbridge/ddbridge-ns.c b/ddbridge/ddbridge-ns.c
index 061f958..c399314 100644
--- a/ddbridge/ddbridge-ns.c
+++ b/ddbridge/ddbridge-ns.c
@@ -39,6 +39,7 @@
 
 #include "ddbridge.h"
 #include "ddbridge-regs.h"
+#include "ddbridge-io.h"
 
 static u16 calc_pcs(struct dvb_ns_params *p)
 {
diff --git a/ddbridge/ddbridge.h b/ddbridge/ddbridge.h
index 0c80d52..a45445a 100644
--- a/ddbridge/ddbridge.h
+++ b/ddbridge/ddbridge.h
@@ -467,211 +467,6 @@ struct ddb {
 
 };
 
-static inline void ddbwriteb(struct ddb *dev, u32 val, u32 adr)
-{
-	writeb(val, (char *) (dev->regs + (adr)));
-}
-
-static inline u32 ddbreadb(struct ddb *dev, u32 adr)
-{
-	return readb((char *) (dev->regs + (adr)));
-}
-
-static inline void ddbwritel0(struct ddb_link *link, u32 val, u32 adr)
-{
-	writel(val, (char *) (link->dev->regs + (adr)));
-}
-
-static inline u32 ddbreadl0(struct ddb_link *link, u32 adr)
-{
-	return readl((char *) (link->dev->regs + (adr)));
-}
-
-#if 0
-static inline void gtlw(struct ddb_link *link)
-{
-	u32 count = 0;
-	static u32 max;
-
-	while (1 & ddbreadl0(link, link->regs + 0x10)) {
-		if (++count == 1024) {
-			pr_info("LTO\n");
-			break;
-		}
-	}
-	if (count > max) {
-		max = count;
-		pr_info("TO=%u\n", max);
-	}
-	if (ddbreadl0(link, link->regs + 0x10) & 0x8000)
-		pr_err("link error\n");
-}
-#else
-static inline void gtlw(struct ddb_link *link)
-{
-	while (1 & ddbreadl0(link, link->regs + 0x10))
-		;
-}
-#endif
-
-
-static u32 ddblreadl(struct ddb_link *link, u32 adr)
-{
-	if (unlikely(link->nr)) {
-		unsigned long flags;
-		u32 val;
-
-		spin_lock_irqsave(&link->lock, flags);
-		gtlw(link);
-		ddbwritel0(link, adr & 0xfffc, link->regs + 0x14);
-		ddbwritel0(link, 3, link->regs + 0x10);
-		gtlw(link);
-		val = ddbreadl0(link, link->regs + 0x1c);
-		spin_unlock_irqrestore(&link->lock, flags);
-		return val;
-	}
-	return readl((char *) (link->dev->regs + (adr)));
-}
-
-static void ddblwritel(struct ddb_link *link, u32 val, u32 adr)
-{
-	if (unlikely(link->nr)) {
-		unsigned long flags;
-
-		spin_lock_irqsave(&link->lock, flags);
-		gtlw(link);
-		ddbwritel0(link, 0xf0000 | (adr & 0xfffc), link->regs + 0x14);
-		ddbwritel0(link, val, link->regs + 0x18);
-		ddbwritel0(link, 1, link->regs + 0x10);
-		spin_unlock_irqrestore(&link->lock, flags);
-		return;
-	}
-	writel(val, (char *) (link->dev->regs + (adr)));
-}
-
-static u32 ddbreadl(struct ddb *dev, u32 adr)
-{
-	if (unlikely(adr & 0xf0000000)) {
-		unsigned long flags;
-		u32 val, l = (adr >> DDB_LINK_SHIFT);
-		struct ddb_link *link = &dev->link[l];
-
-		spin_lock_irqsave(&link->lock, flags);
-		gtlw(link);
-		ddbwritel0(link, adr & 0xfffc, link->regs + 0x14);
-		ddbwritel0(link, 3, link->regs + 0x10);
-		gtlw(link);
-		val = ddbreadl0(link, link->regs + 0x1c);
-		spin_unlock_irqrestore(&link->lock, flags);
-		return val;
-	}
-	return readl((char *) (dev->regs + (adr)));
-}
-
-static void ddbwritel(struct ddb *dev, u32 val, u32 adr)
-{
-	if (unlikely(adr & 0xf0000000)) {
-		unsigned long flags;
-		u32 l = (adr >> DDB_LINK_SHIFT);
-		struct ddb_link *link = &dev->link[l];
-
-		spin_lock_irqsave(&link->lock, flags);
-		gtlw(link);
-		ddbwritel0(link, 0xf0000 | (adr & 0xfffc), link->regs + 0x14);
-		ddbwritel0(link, val, link->regs + 0x18);
-		ddbwritel0(link, 1, link->regs + 0x10);
-		spin_unlock_irqrestore(&link->lock, flags);
-		return;
-	}
-	writel(val, (char *) (dev->regs + (adr)));
-}
-
-static void gtlcpyto(struct ddb *dev, u32 adr, const u8 *buf,
-		     unsigned int count)
-{
-	u32 val = 0, p = adr;
-	u32 aa = p & 3;
-
-	if (aa) {
-		while (p & 3 && count) {
-			val >>= 8;
-			val |= *buf << 24;
-			p++;
-			buf++;
-			count--;
-		}
-		ddbwritel(dev, val, adr);
-	}
-	while (count >= 4) {
-		val = buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
-		ddbwritel(dev, val, p);
-		p += 4;
-		buf += 4;
-		count -= 4;
-	}
-	if (count) {
-		val = buf[0];
-		if (count > 1)
-			val |= buf[1] << 8;
-		if (count > 2)
-			val |= buf[2] << 16;
-		ddbwritel(dev, val, p);
-	}
-}
-
-static void gtlcpyfrom(struct ddb *dev, u8 *buf, u32 adr, long count)
-{
-	u32 val = 0, p = adr;
-	u32 a = p & 3;
-
-	if (a) {
-		val = ddbreadl(dev, p) >> (8 * a);
-		while (p & 3 && count) {
-			*buf = val & 0xff;
-			val >>= 8;
-			p++;
-			buf++;
-			count--;
-		}
-	}
-	while (count >= 4) {
-		val = ddbreadl(dev, p);
-		buf[0] = val & 0xff;
-		buf[1] = (val >> 8) & 0xff;
-		buf[2] = (val >> 16) & 0xff;
-		buf[3] = (val >> 24) & 0xff;
-		p += 4;
-		buf += 4;
-		count -= 4;
-	}
-	if (count) {
-		val = ddbreadl(dev, p);
-		buf[0] = val & 0xff;
-		if (count > 1)
-			buf[1] = (val >> 8) & 0xff;
-		if (count > 2)
-			buf[2] = (val >> 16) & 0xff;
-	}
-}
-
-static void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count)
-{
-	if (unlikely(adr & 0xf0000000))
-		return gtlcpyto(dev, adr, src, count);
-	return memcpy_toio((char *) (dev->regs + adr), src, count);
-}
-
-static void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count)
-{
-	if (unlikely(adr & 0xf0000000))
-		return gtlcpyfrom(dev, dst, adr, count);
-	return memcpy_fromio(dst, (char *) (dev->regs + adr), count);
-}
-
-#define ddbmemset(_dev, _adr, _val, _count) \
-	memset_io((char *) (_dev->regs + (_adr)), (_val), (_count))
-
-
 /****************************************************************************/
 /****************************************************************************/
 /****************************************************************************/
diff --git a/ddbridge/octonet-main.c b/ddbridge/octonet-main.c
index da2f03a..7387117 100644
--- a/ddbridge/octonet-main.c
+++ b/ddbridge/octonet-main.c
@@ -40,6 +40,8 @@
 #include "ddbridge.h"
 #include "ddbridge-regs.h"
 #include "ddbridge-hw.h"
+#include "ddbridge-io.h"
+
 #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0))
 #include <asm-generic/pci-dma-compat.h>
 #else