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