[U-Boot] [PATCH v2 1/2] MIPS: add clrbits and setbits and add phy_to_bus support.

[Govindraj Raja]

From: Govindraj Raja <Govindraj.Raja at imgtec.com>

usb stack utilizes the clr/set_bits macros
also usb stack needs phy_to_bus/bus_to_phys functions.
Thus adding these macro and functions for mips platform.

This makes usb stack usable with mips platform.

Signed-off-by: Govindraj Raja <govindraj.raja at imgtec.com>
---

Changes from v1:
---------------
Fixes comments from Daniel as dicussed in below thread:
https://patchwork.ozlabs.org/patch/508821/


 arch/mips/include/asm/io.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++
 arch/mips/lib/io.c         | 14 ++++++++++++
 2 files changed, 68 insertions(+)

diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index a7ab087..4093941 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -504,4 +504,58 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
 
 }
 
+#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)
+
+/*
+ * 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 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)
+
 #endif /* _ASM_IO_H */
diff --git a/arch/mips/lib/io.c b/arch/mips/lib/io.c
index b2d4a09..58a66fc 100644
--- a/arch/mips/lib/io.c
+++ b/arch/mips/lib/io.c
@@ -10,3 +10,17 @@
  * I/O ports are mapped.
  */
 const unsigned long mips_io_port_base = -1;
+
+#ifdef CONFIG_PHYS_TO_BUS
+
+__weak unsigned long phys_to_bus(unsigned long phys)
+{
+	return (unsigned long)virt_to_phys((void *)phys);
+}
+
+__weak unsigned long bus_to_phys(unsigned long bus)
+{
+	return (unsigned long)phys_to_virt(bus);
+}
+
+#endif
-- 
1.9.1