1 /* 2 * ddbridge-io.h: Digital Devices bridge I/O inline functions 3 * 4 * Copyright (C) 2010-2017 Digital Devices GmbH 5 * Ralph Metzler <rjkm@metzlerbros.de> 6 * Marcus Metzler <mocm@metzlerbros.de> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * version 2 only, as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 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 28 static inline u32 ddblreadl(struct ddb_link *link, u32 adr) 29 { 30 return readl(link->dev->regs + adr); 31 } 32 33 static inline void ddblwritel(struct ddb_link *link, u32 val, u32 adr) 34 { 35 writel(val, link->dev->regs + adr); 36 } 37 38 static inline u32 ddbreadl(struct ddb *dev, u32 adr) 39 { 40 return readl(dev->regs + adr); 41 } 42 43 static inline void ddbwritel(struct ddb *dev, u32 val, u32 adr) 44 { 45 writel(val, dev->regs + adr); 46 } 47 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 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 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