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 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 only, as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
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
ddblreadl(struct ddb_link * link,u32 adr)28 static inline u32 ddblreadl(struct ddb_link *link, u32 adr)
29 {
30 return readl(link->dev->regs + adr);
31 }
32
ddblwritel(struct ddb_link * link,u32 val,u32 adr)33 static inline void ddblwritel(struct ddb_link *link, u32 val, u32 adr)
34 {
35 writel(val, link->dev->regs + adr);
36 }
37
ddbreadl(struct ddb * dev,u32 adr)38 static inline u32 ddbreadl(struct ddb *dev, u32 adr)
39 {
40 return readl(dev->regs + adr);
41 }
42
ddbwritel(struct ddb * dev,u32 val,u32 adr)43 static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr)
44 {
45 writel(val, dev->regs + adr);
46 }
47
ddbcpyto(struct ddb * dev,u32 adr,void * src,long count)48 static inline void ddbcpyto(struct ddb *dev, u32 adr, void *src, long count)
49 {
50 memcpy_toio(dev->regs + adr, src, count);
51 }
52
ddbcpyfrom(struct ddb * dev,void * dst,u32 adr,long count)53 static inline void ddbcpyfrom(struct ddb *dev, void *dst, u32 adr, long count)
54 {
55 memcpy_fromio(dst, dev->regs + adr, count);
56 }
57
safe_ddbreadl(struct ddb * dev,u32 adr)58 static 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