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
ddblreadl(struct ddb_link * link,u32 adr)19 static inline u32 ddblreadl(struct ddb_link *link, u32 adr)
20 {
21 return readl(link->dev->regs + adr);
22 }
23
ddblwritel(struct ddb_link * link,u32 val,u32 adr)24 static inline void ddblwritel(struct ddb_link *link, u32 val, u32 adr)
25 {
26 writel(val, link->dev->regs + adr);
27 }
28
ddbreadl(struct ddb * dev,u32 adr)29 static inline u32 ddbreadl(struct ddb *dev, u32 adr)
30 {
31 return readl(dev->regs + adr);
32 }
33
ddbwritel(struct ddb * dev,u32 val,u32 adr)34 static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr)
35 {
36 writel(val, dev->regs + adr);
37 }
38
ddbcpyto(struct ddb * dev,u32 adr,void * src,long count)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
ddbcpyfrom(struct ddb * dev,void * dst,u32 adr,long count)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
safe_ddbreadl(struct ddb * dev,u32 adr)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__ */
63