1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/media/pci/ddbridge/ddbridge-io.h b/drivers/media/pci/ddbridge/ddbridge-io.h
new file mode 100644
index 000000000..1a5b31b52
--- /dev/null
+++ b/drivers/media/pci/ddbridge/ddbridge-io.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * 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 u32 ddblreadl(struct ddb_link *link, u32 adr)
+{
+	return readl(link->dev->regs + adr);
+}
+
+static inline void ddblwritel(struct ddb_link *link, u32 val, u32 adr)
+{
+	writel(val, link->dev->regs + adr);
+}
+
+static inline u32 ddbreadl(struct ddb *dev, u32 adr)
+{
+	return readl(dev->regs + adr);
+}
+
+static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr)
+{
+	writel(val, dev->regs + adr);
+}
+
+static inline void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count)
+{
+	memcpy_toio(dev->regs + adr, src, count);
+}
+
+static inline void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count)
+{
+	memcpy_fromio(dst, dev->regs + adr, count);
+}
+
+static inline u32 safe_ddbreadl(struct ddb *dev, u32 adr)
+{
+	u32 val = ddbreadl(dev, adr);
+
+	/* (ddb)readl returns (uint)-1 (all bits set) on failure, catch that */
+	if (val == ~0) {
+		dev_err(&dev->pdev->dev, "ddbreadl failure, adr=%08x\n", adr);
+		return 0;
+	}
+
+	return val;
+}
+
+#endif /* __DDBRIDGE_IO_H__ */