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

   1/*
   2 * ddbridge-io.h: Digital Devices bridge I/O inline functions
   3 *
   4 * Copyright (C) 2010-2017 Digital Devices GmbH
   5 *                         Ralph Metzler <rjkm@metzlerbros.de>
   6 *                         Marcus Metzler <mocm@metzlerbros.de>
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License
  10 * version 2 only, as published by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 */
  18
  19#ifndef __DDBRIDGE_IO_H__
  20#define __DDBRIDGE_IO_H__
  21
  22#include <linux/io.h>
  23
  24#include "ddbridge.h"
  25
  26/******************************************************************************/
  27
  28static inline u32 ddblreadl(struct ddb_link *link, u32 adr)
  29{
  30        return readl(link->dev->regs + adr);
  31}
  32
  33static inline void ddblwritel(struct ddb_link *link, u32 val, u32 adr)
  34{
  35        writel(val, link->dev->regs + adr);
  36}
  37
  38static inline u32 ddbreadl(struct ddb *dev, u32 adr)
  39{
  40        return readl(dev->regs + adr);
  41}
  42
  43static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr)
  44{
  45        writel(val, dev->regs + adr);
  46}
  47
  48static inline void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count)
  49{
  50        return memcpy_toio(dev->regs + adr, src, count);
  51}
  52
  53static inline void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count)
  54{
  55        return memcpy_fromio(dst, dev->regs + adr, count);
  56}
  57
  58static inline u32 safe_ddbreadl(struct ddb *dev, u32 adr)
  59{
  60        u32 val = ddbreadl(dev, adr);
  61
  62        /* (ddb)readl returns (uint)-1 (all bits set) on failure, catch that */
  63        if (val == ~0) {
  64                dev_err(&dev->pdev->dev, "ddbreadl failure, adr=%08x\n", adr);
  65                return 0;
  66        }
  67
  68        return val;
  69}
  70
  71#endif /* __DDBRIDGE_IO_H__ */
  72