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(addr: link->dev->regs + adr); |
22 | } |
23 | |
24 | static inline void ddblwritel(struct ddb_link *link, u32 val, u32 adr) |
25 | { |
26 | writel(val, addr: link->dev->regs + adr); |
27 | } |
28 | |
29 | static inline u32 ddbreadl(struct ddb *dev, u32 adr) |
30 | { |
31 | return readl(addr: dev->regs + adr); |
32 | } |
33 | |
34 | static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr) |
35 | { |
36 | writel(val, addr: 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__ */ |
63 | |