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
19static inline u32 ddblreadl(struct ddb_link *link, u32 adr)
20{
21	return readl(link->dev->regs + adr);
22}
23
24static inline void ddblwritel(struct ddb_link *link, u32 val, u32 adr)
25{
26	writel(val, link->dev->regs + adr);
27}
28
29static inline u32 ddbreadl(struct ddb *dev, u32 adr)
30{
31	return readl(dev->regs + adr);
32}
33
34static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr)
35{
36	writel(val, dev->regs + adr);
37}
38
39static inline void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count)
40{
41	memcpy_toio(dev->regs + adr, src, count);
42}
43
44static inline void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count)
45{
46	memcpy_fromio(dst, dev->regs + adr, count);
47}
48
49static 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__ */