/* * IO header file * * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. * TsiChung Liew (Tsi-Chung.Liew@freescale.com) * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #ifndef __ASM_M68K_IO_H__ #define __ASM_M68K_IO_H__ #include <asm/byteorder.h> #ifndef _IO_BASE #define _IO_BASE 0 #endif #define __raw_readb(addr) (*(volatile u8 *)(addr)) #define __raw_readw(addr) (*(volatile u16 *)(addr)) #define __raw_readl(addr) (*(volatile u32 *)(addr)) #define __raw_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b)) #define __raw_writew(w,addr) ((*(volatile u16 *) (addr)) = (w)) #define __raw_writel(l,addr) ((*(volatile u32 *) (addr)) = (l)) #define readb(addr) in_8((volatile u8 *)(addr)) #define writeb(b,addr) out_8((volatile u8 *)(addr), (b)) #if !defined(__BIG_ENDIAN) #define readw(addr) (*(volatile u16 *) (addr)) #define readl(addr) (*(volatile u32 *) (addr)) #define writew(b,addr) ((*(volatile u16 *) (addr)) = (b)) #define writel(b,addr) ((*(volatile u32 *) (addr)) = (b)) #else #define readw(addr) in_le16((volatile u16 *)(addr)) #define readl(addr) in_le32((volatile u32 *)(addr)) #define writew(b,addr) out_le16((volatile u16 *)(addr),(b)) #define writel(b,addr) out_le32((volatile u32 *)(addr),(b)) #endif /* * The insw/outsw/insl/outsl macros don't do byte-swapping. * They are only used in practice for transferring buffers which * are arrays of bytes, and byte-swapping is not appropriate in * that case. - paulus */ #define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns)) #define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns)) #define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) #define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) #define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) #define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) #define inb(port) in_8((u8 *)((port)+_IO_BASE)) #define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val)) #if !defined(__BIG_ENDIAN) #define inw(port) in_be16((u16 *)((port)+_IO_BASE)) #define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val)) #define inl(port) in_be32((u32 *)((port)+_IO_BASE)) #define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val)) #else #define inw(port) in_le16((u16 *)((port)+_IO_BASE)) #define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val)) #define inl(port) in_le32((u32 *)((port)+_IO_BASE)) #define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val)) #endif extern inline void _insb(volatile u8 * port, void *buf, int ns) { u8 *data = (u8 *) buf; while (ns--) *data++ = *port; } extern inline void _outsb(volatile u8 * port, const void *buf, int ns) { u8 *data = (u8 *) buf; while (ns--) *port = *data++; } extern inline void _insw(volatile u16 * port, void *buf, int ns) { u16 *data = (u16 *) buf; while (ns--) *data++ = __sw16(*port); } extern inline void _outsw(volatile u16 * port, const void *buf, int ns) { u16 *data = (u16 *) buf; while (ns--) { *port = __sw16(*data); data++; } } extern inline void _insl(volatile u32 * port, void *buf, int nl) { u32 *data = (u32 *) buf; while (nl--) *data++ = __sw32(*port); } extern inline void _outsl(volatile u32 * port, const void *buf, int nl) { u32 *data = (u32 *) buf; while (nl--) { *port = __sw32(*data); data++; } } extern inline void _insw_ns(volatile u16 * port, void *buf, int ns) { u16 *data = (u16 *) buf; while (ns--) *data++ = *port; } extern inline void _outsw_ns(volatile u16 * port, const void *buf, int ns) { u16 *data = (u16 *) buf; while (ns--) { *port = *data++; } } extern inline void _insl_ns(volatile u32 * port, void *buf, int nl) { u32 *data = (u32 *) buf; while (nl--) *data++ = *port; } extern inline void _outsl_ns(volatile u32 * port, const void *buf, int nl) { u32 *data = (u32 *) buf; while (nl--) { *port = *data; data++; } } /* * The *_ns versions below don't do byte-swapping. * Neither do the standard versions now, these are just here * for older code. */ #define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) #define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) #define IO_SPACE_LIMIT ~0 /* * 8, 16 and 32 bit, big and little endian I/O operations, with barrier. */ extern inline int in_8(volatile u8 * addr) { return (int)*addr; } extern inline void out_8(volatile u8 * addr, int val) { *addr = (u8) val; } extern inline int in_le16(volatile u16 * addr) { return __sw16(*addr); } extern inline int in_be16(volatile u16 * addr) { return (*addr & 0xFFFF); } extern inline void out_le16(volatile u16 * addr, int val) { *addr = __sw16(val); } extern inline void out_be16(volatile u16 * addr, int val) { *addr = (u16) val; } extern inline unsigned in_le32(volatile u32 * addr) { return __sw32(*addr); } extern inline unsigned in_be32(volatile u32 * addr) { return (*addr); } extern inline void out_le32(volatile unsigned *addr, int val) { *addr = __sw32(val); } extern inline void out_be32(volatile unsigned *addr, int val) { *addr = val; } static inline void sync(void) { /* This sync function is for PowerPC or other architecture instruction * ColdFire does not have this instruction. Dummy function, added for * compatibility (CFI driver) */ } /* * Given a physical address and a length, return a virtual address * that can be used to access the memory range with the caching * properties specified by "flags". */ #define MAP_NOCACHE (0) #define MAP_WRCOMBINE (0) #define MAP_WRBACK (0) #define MAP_WRTHROUGH (0) static inline void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) { return (void *)paddr; } /* * Take down a mapping set up by map_physmem(). */ static inline void unmap_physmem(void *vaddr, unsigned long flags) { } static inline phys_addr_t virt_to_phys(void * vaddr) { return (phys_addr_t)(vaddr); } #endif /* __ASM_M68K_IO_H__ */