ARM: add accessors functions

Some Freescale's processors of different architecture
have the same peripheral (eSDHC controller in PowerPC
and i.MX51). This patch adds accessors for
the internal registers of the SOCs, as already
implemented in the PowerPC architecture.

Signed-off-by: Stefano Babic <sbabic@denx.de>

1 files changed, 55 insertions, 0 deletions

diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h
index fec3a7eace5..0a4b5be7157 100644
--- a/include/asm-arm/io.h
+++ b/include/asm-arm/io.h
@@ -113,6 +113,61 @@ extern void __raw_readsl(unsigned int addr, void *data, int longlen);
 #define __raw_base_readl(base,off)	__arch_base_getl(base,off)
 
 /*
+ * Clear and set bits in one shot. These macros can be used to clear and
+ * set multiple bits in a register using a single call. These macros can
+ * also be used to set a multiple-bit bit pattern using a mask, by
+ * specifying the mask in the 'clear' parameter and the new bit pattern
+ * in the 'set' parameter.
+ */
+
+#define out_arch(type,endian,a,v)	__raw_write##type(cpu_to_##endian(v),a)
+#define in_arch(type,endian,a)		endian##_to_cpu(__raw_read##type(a))
+
+#define out_le32(a,v)	out_arch(l,le32,a,v)
+#define out_le16(a,v)	out_arch(w,le16,a,v)
+
+#define in_le32(a)	in_arch(l,le32,a)
+#define in_le16(a)	in_arch(w,le16,a)
+
+#define out_be32(a,v)	out_arch(l,be32,a,v)
+#define out_be16(a,v)	out_arch(w,be16,a,v)
+
+#define in_be32(a)	in_arch(l,be32,a)
+#define in_be16(a)	in_arch(w,be16,a)
+
+#define out_8(a,v)	__raw_writeb(v,a)
+#define in_8(a)		__raw_readb(a)
+
+#define clrbits(type, addr, clear) \
+	out_##type((addr), in_##type(addr) & ~(clear))
+
+#define setbits(type, addr, set) \
+	out_##type((addr), in_##type(addr) | (set))
+
+#define clrsetbits(type, addr, clear, set) \
+	out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
+
+#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
+#define setbits_be32(addr, set) setbits(be32, addr, set)
+#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
+
+#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
+#define setbits_le32(addr, set) setbits(le32, addr, set)
+#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
+
+#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
+#define setbits_be16(addr, set) setbits(be16, addr, set)
+#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
+
+#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
+#define setbits_le16(addr, set) setbits(le16, addr, set)
+#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
+
+#define clrbits_8(addr, clear) clrbits(8, addr, clear)
+#define setbits_8(addr, set) setbits(8, addr, set)
+#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
+
+/*
  * Now, pick up the machine-defined IO definitions
  */
 #if 0	/* XXX###XXX */