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Diffstat (limited to 'arch/m68k/include/asm/io.h')
| -rw-r--r-- | arch/m68k/include/asm/io.h | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/io.h b/arch/m68k/include/asm/io.h new file mode 100644 index 0000000..531f420 --- /dev/null +++ b/arch/m68k/include/asm/io.h @@ -0,0 +1,263 @@ +/* + * 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__ */ |