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-rw-r--r--drivers/media/pci/ddbridge/ddbridge-io.h62
1 files changed, 62 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 0000000000..991246cece
--- /dev/null
+++ b/drivers/media/pci/ddbridge/ddbridge-io.h
@@ -0,0 +1,62 @@
+/* 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>
+ */
+
+#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__ */