drivers/media/pci/ddbridge/ddbridge-io.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * ddbridge-io.h: Digital Devices bridge I/O inline functions
   4  *
   5  * Copyright (C) 2010-2017 Digital Devices GmbH
   6  *                         Ralph Metzler <rjkm@metzlerbros.de>
   7  *                         Marcus Metzler <mocm@metzlerbros.de>
   8  */
   9
  10 #ifndef __DDBRIDGE_IO_H__
  11 #define __DDBRIDGE_IO_H__
  12
  13 #include <linux/io.h>
  14
  15 #include "ddbridge.h"
  16
  17 /******************************************************************************/
  18
  19 static inline u32 ddblreadl(struct ddb_link *link, u32 adr)
  20 {
  21         return readl(link->dev->regs + adr);
  22 }
  23
  24 static inline void ddblwritel(struct ddb_link *link, u32 val, u32 adr)
  25 {
  26         writel(val, link->dev->regs + adr);
  27 }
  28
  29 static inline u32 ddbreadl(struct ddb *dev, u32 adr)
  30 {
  31         return readl(dev->regs + adr);
  32 }
  33
  34 static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr)
  35 {
  36         writel(val, dev->regs + adr);
  37 }
  38
  39 static inline void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count)
  40 {
  41         memcpy_toio(dev->regs + adr, src, count);
  42 }
  43
  44 static inline void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count)
  45 {
  46         memcpy_fromio(dst, dev->regs + adr, count);
  47 }
  48
  49 static inline u32 safe_ddbreadl(struct ddb *dev, u32 adr)
  50 {
  51         u32 val = ddbreadl(dev, adr);
  52
  53         /* (ddb)readl returns (uint)-1 (all bits set) on failure, catch that */
  54         if (val == ~0) {
  55                 dev_err(&dev->pdev->dev, "ddbreadl failure, adr=%08x\n", adr);
  56                 return 0;
  57         }
  58
  59         return val;
  60 }
  61
  62 #endif /* __DDBRIDGE_IO_H__ */