diff options
Diffstat (limited to 'drivers/media/pci/ddbridge/ddbridge-io.h')
| -rw-r--r-- | drivers/media/pci/ddbridge/ddbridge-io.h | 62 |
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 000000000..991246cec --- /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__ */ |