sh: add writesb(), readsb(), writesw() and readsw() to io.h

This patch adds inline versions of writesb(), readsb(), writesw() and readsw() to include/asm-sh/io.h. Stolen from include/asm-avr32/io.h. These functions are needed to compile certain device drivers such as ax88796. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>

sh: add writesb(), readsb(), writesw() and readsw() to io.h
This patch adds inline versions of writesb(), readsb(), writesw() and readsw() to include/asm-sh/io.h. Stolen from include/asm-avr32/io.h. These functions are needed to compile certain device drivers such as ax88796. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Magnus Damm · Paul Mundt
1 parent 9d4c826259
Showing 1 changed file with 26 additions and 0 deletions Side-by-side Diff
include/asm-sh/io.h
@@ -135,6 +135,32 @@
 # define writel(v,a)	({ __raw_writel((v),(a)); mb(); })
 #endif
  
+#define __BUILD_MEMORY_STRING(bwlq, type)				\
+									\
+static inline void writes##bwlq(volatile void __iomem *mem,		\
+				const void *addr, unsigned int count)	\
+{									\
+	const volatile type *__addr = addr;				\
+									\
+	while (count--) {						\
+		__raw_write##bwlq(*__addr, mem);			\
+		__addr++;						\
+	}								\
+}									\
+									\
+static inline void reads##bwlq(volatile void __iomem *mem, void *addr,	\
+			       unsigned int count)			\
+{									\
+	volatile type *__addr = addr;					\
+									\
+	while (count--) {						\
+		*__addr = __raw_read##bwlq(mem);			\
+		__addr++;						\
+	}								\
+}
+
+__BUILD_MEMORY_STRING(b, u8)
+__BUILD_MEMORY_STRING(w, u16)
 #define writesl __raw_writesl
 #define readsl  __raw_readsl
...	...	@@ -135,6 +135,32 @@
135	135	# define writel(v,a) ({ __raw_writel((v),(a)); mb(); })
136	136	#endif
137	137
	138	+#define __BUILD_MEMORY_STRING(bwlq, type) \
	139	+ \
	140	+static inline void writes##bwlq(volatile void __iomem *mem, \
	141	+ const void *addr, unsigned int count) \
	142	+{ \
	143	+ const volatile type *__addr = addr; \
	144	+ \
	145	+ while (count--) { \
	146	+ __raw_write##bwlq(*__addr, mem); \
	147	+ __addr++; \
	148	+ } \
	149	+} \
	150	+ \
	151	+static inline void reads##bwlq(volatile void __iomem mem, void addr, \
	152	+ unsigned int count) \
	153	+{ \
	154	+ volatile type *__addr = addr; \
	155	+ \
	156	+ while (count--) { \
	157	+ *__addr = __raw_read##bwlq(mem); \
	158	+ __addr++; \
	159	+ } \
	160	+}
	161	+
	162	+__BUILD_MEMORY_STRING(b, u8)
	163	+__BUILD_MEMORY_STRING(w, u16)
138	164	#define writesl __raw_writesl
139	165	#define readsl __raw_readsl
140	166