summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-s3c24xx/include/mach/io.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-s3c24xx/include/mach/io.h')
-rw-r--r--arch/arm/mach-s3c24xx/include/mach/io.h211
1 files changed, 211 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c24xx/include/mach/io.h b/arch/arm/mach-s3c24xx/include/mach/io.h
new file mode 100644
index 0000000..5dd1db4
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/include/mach/io.h
@@ -0,0 +1,211 @@
+/*
+ * arch/arm/mach-s3c2410/include/mach/io.h
+ * from arch/arm/mach-rpc/include/mach/io.h
+ *
+ * Copyright (C) 1997 Russell King
+ * (C) 2003 Simtec Electronics
+*/
+
+#ifndef __ASM_ARM_ARCH_IO_H
+#define __ASM_ARM_ARCH_IO_H
+
+#include <mach/hardware.h>
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+/*
+ * We use two different types of addressing - PC style addresses, and ARM
+ * addresses. PC style accesses the PC hardware with the normal PC IO
+ * addresses, eg 0x3f8 for serial#1. ARM addresses are above A28
+ * and are translated to the start of IO. Note that all addresses are
+ * not shifted left!
+ */
+
+#define __PORT_PCIO(x) ((x) < (1<<28))
+
+#define PCIO_BASE (S3C24XX_VA_ISA_WORD)
+#define PCIO_BASE_b (S3C24XX_VA_ISA_BYTE)
+#define PCIO_BASE_w (S3C24XX_VA_ISA_WORD)
+#define PCIO_BASE_l (S3C24XX_VA_ISA_WORD)
+/*
+ * Dynamic IO functions - let the compiler
+ * optimize the expressions
+ */
+
+#define DECLARE_DYN_OUT(sz,fnsuffix,instr) \
+static inline void __out##fnsuffix (unsigned int val, unsigned int port) \
+{ \
+ unsigned long temp; \
+ __asm__ __volatile__( \
+ "cmp %2, #(1<<28)\n\t" \
+ "mov %0, %2\n\t" \
+ "addcc %0, %0, %3\n\t" \
+ "str" instr " %1, [%0, #0 ] @ out" #fnsuffix \
+ : "=&r" (temp) \
+ : "r" (val), "r" (port), "Ir" (PCIO_BASE_##fnsuffix) \
+ : "cc"); \
+}
+
+
+#define DECLARE_DYN_IN(sz,fnsuffix,instr) \
+static inline unsigned sz __in##fnsuffix (unsigned int port) \
+{ \
+ unsigned long temp, value; \
+ __asm__ __volatile__( \
+ "cmp %2, #(1<<28)\n\t" \
+ "mov %0, %2\n\t" \
+ "addcc %0, %0, %3\n\t" \
+ "ldr" instr " %1, [%0, #0 ] @ in" #fnsuffix \
+ : "=&r" (temp), "=r" (value) \
+ : "r" (port), "Ir" (PCIO_BASE_##fnsuffix) \
+ : "cc"); \
+ return (unsigned sz)value; \
+}
+
+static inline void __iomem *__ioaddr (unsigned long port)
+{
+ return __PORT_PCIO(port) ? (PCIO_BASE + port) : (void __iomem *)port;
+}
+
+#define DECLARE_IO(sz,fnsuffix,instr) \
+ DECLARE_DYN_IN(sz,fnsuffix,instr) \
+ DECLARE_DYN_OUT(sz,fnsuffix,instr)
+
+DECLARE_IO(char,b,"b")
+DECLARE_IO(short,w,"h")
+DECLARE_IO(int,l,"")
+
+#undef DECLARE_IO
+#undef DECLARE_DYN_IN
+
+/*
+ * Constant address IO functions
+ *
+ * These have to be macros for the 'J' constraint to work -
+ * +/-4096 immediate operand.
+ */
+#define __outbc(value,port) \
+({ \
+ if (__PORT_PCIO((port))) \
+ __asm__ __volatile__( \
+ "strb %0, [%1, %2] @ outbc" \
+ : : "r" (value), "r" (PCIO_BASE), "Jr" ((port))); \
+ else \
+ __asm__ __volatile__( \
+ "strb %0, [%1, #0] @ outbc" \
+ : : "r" (value), "r" ((port))); \
+})
+
+#define __inbc(port) \
+({ \
+ unsigned char result; \
+ if (__PORT_PCIO((port))) \
+ __asm__ __volatile__( \
+ "ldrb %0, [%1, %2] @ inbc" \
+ : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port))); \
+ else \
+ __asm__ __volatile__( \
+ "ldrb %0, [%1, #0] @ inbc" \
+ : "=r" (result) : "r" ((port))); \
+ result; \
+})
+
+#define __outwc(value,port) \
+({ \
+ unsigned long v = value; \
+ if (__PORT_PCIO((port))) { \
+ if ((port) < 256 && (port) > -256) \
+ __asm__ __volatile__( \
+ "strh %0, [%1, %2] @ outwc" \
+ : : "r" (v), "r" (PCIO_BASE), "Jr" ((port))); \
+ else if ((port) > 0) \
+ __asm__ __volatile__( \
+ "strh %0, [%1, %2] @ outwc" \
+ : : "r" (v), \
+ "r" (PCIO_BASE + ((port) & ~0xff)), \
+ "Jr" (((port) & 0xff))); \
+ else \
+ __asm__ __volatile__( \
+ "strh %0, [%1, #0] @ outwc" \
+ : : "r" (v), \
+ "r" (PCIO_BASE + (port))); \
+ } else \
+ __asm__ __volatile__( \
+ "strh %0, [%1, #0] @ outwc" \
+ : : "r" (v), "r" ((port))); \
+})
+
+#define __inwc(port) \
+({ \
+ unsigned short result; \
+ if (__PORT_PCIO((port))) { \
+ if ((port) < 256 && (port) > -256 ) \
+ __asm__ __volatile__( \
+ "ldrh %0, [%1, %2] @ inwc" \
+ : "=r" (result) \
+ : "r" (PCIO_BASE), \
+ "Jr" ((port))); \
+ else if ((port) > 0) \
+ __asm__ __volatile__( \
+ "ldrh %0, [%1, %2] @ inwc" \
+ : "=r" (result) \
+ : "r" (PCIO_BASE + ((port) & ~0xff)), \
+ "Jr" (((port) & 0xff))); \
+ else \
+ __asm__ __volatile__( \
+ "ldrh %0, [%1, #0] @ inwc" \
+ : "=r" (result) \
+ : "r" (PCIO_BASE + ((port)))); \
+ } else \
+ __asm__ __volatile__( \
+ "ldrh %0, [%1, #0] @ inwc" \
+ : "=r" (result) : "r" ((port))); \
+ result; \
+})
+
+#define __outlc(value,port) \
+({ \
+ unsigned long v = value; \
+ if (__PORT_PCIO((port))) \
+ __asm__ __volatile__( \
+ "str %0, [%1, %2] @ outlc" \
+ : : "r" (v), "r" (PCIO_BASE), "Jr" ((port))); \
+ else \
+ __asm__ __volatile__( \
+ "str %0, [%1, #0] @ outlc" \
+ : : "r" (v), "r" ((port))); \
+})
+
+#define __inlc(port) \
+({ \
+ unsigned long result; \
+ if (__PORT_PCIO((port))) \
+ __asm__ __volatile__( \
+ "ldr %0, [%1, %2] @ inlc" \
+ : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port))); \
+ else \
+ __asm__ __volatile__( \
+ "ldr %0, [%1, #0] @ inlc" \
+ : "=r" (result) : "r" ((port))); \
+ result; \
+})
+
+#define __ioaddrc(port) ((__PORT_PCIO(port) ? PCIO_BASE + (port) : (void __iomem *)(port)))
+
+#define inb(p) (__builtin_constant_p((p)) ? __inbc(p) : __inb(p))
+#define inw(p) (__builtin_constant_p((p)) ? __inwc(p) : __inw(p))
+#define inl(p) (__builtin_constant_p((p)) ? __inlc(p) : __inl(p))
+#define outb(v,p) (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p))
+#define outw(v,p) (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p))
+#define outl(v,p) (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p))
+#define __ioaddr(p) (__builtin_constant_p((p)) ? __ioaddr(p) : __ioaddrc(p))
+
+#define insb(p,d,l) __raw_readsb(__ioaddr(p),d,l)
+#define insw(p,d,l) __raw_readsw(__ioaddr(p),d,l)
+#define insl(p,d,l) __raw_readsl(__ioaddr(p),d,l)
+
+#define outsb(p,d,l) __raw_writesb(__ioaddr(p),d,l)
+#define outsw(p,d,l) __raw_writesw(__ioaddr(p),d,l)
+#define outsl(p,d,l) __raw_writesl(__ioaddr(p),d,l)
+
+#endif