io_generic.c
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上传日期:2013-04-10
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文件大小:4k
- /* $Id: io_generic.c,v 1.12 2000/11/14 16:45:11 sugioka Exp $
- *
- * linux/arch/sh/kernel/io_generic.c
- *
- * Copyright (C) 2000 Niibe Yutaka
- *
- * Generic I/O routine. These can be used where a machine specific version
- * is not required.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- */
- #include <asm/io.h>
- #include <asm/machvec.h>
- #include <linux/module.h>
- #if defined(__sh3__)
- /* I'm not sure SH7709 has this kind of bug */
- #define SH3_PCMCIA_BUG_WORKAROUND 1
- #define DUMMY_READ_AREA6 0xba000000
- #endif
- #define PORT2ADDR(x) (sh_mv.mv_isa_port2addr(x))
- unsigned long generic_io_base;
- static inline void delay(void)
- {
- ctrl_inw(0xa0000000);
- }
- unsigned char generic_inb(unsigned long port)
- {
- return *(volatile unsigned char*)PORT2ADDR(port);
- }
- unsigned short generic_inw(unsigned long port)
- {
- return *(volatile unsigned short*)PORT2ADDR(port);
- }
- unsigned int generic_inl(unsigned long port)
- {
- return *(volatile unsigned long*)PORT2ADDR(port);
- }
- unsigned char generic_inb_p(unsigned long port)
- {
- unsigned long v = *(volatile unsigned char*)PORT2ADDR(port);
- delay();
- return v;
- }
- unsigned short generic_inw_p(unsigned long port)
- {
- unsigned long v = *(volatile unsigned short*)PORT2ADDR(port);
- delay();
- return v;
- }
- unsigned int generic_inl_p(unsigned long port)
- {
- unsigned long v = *(volatile unsigned long*)PORT2ADDR(port);
- delay();
- return v;
- }
- void generic_insb(unsigned long port, void *buffer, unsigned long count)
- {
- unsigned char *buf=buffer;
- while(count--) *buf++=inb(port);
- }
- void generic_insw(unsigned long port, void *buffer, unsigned long count)
- {
- unsigned short *buf=buffer;
- while(count--) *buf++=inw(port);
- #ifdef SH3_PCMCIA_BUG_WORKAROUND
- ctrl_inb (DUMMY_READ_AREA6);
- #endif
- }
- void generic_insl(unsigned long port, void *buffer, unsigned long count)
- {
- unsigned long *buf=buffer;
- while(count--) *buf++=inl(port);
- #ifdef SH3_PCMCIA_BUG_WORKAROUND
- ctrl_inb (DUMMY_READ_AREA6);
- #endif
- }
- void generic_outb(unsigned char b, unsigned long port)
- {
- *(volatile unsigned char*)PORT2ADDR(port) = b;
- }
- void generic_outw(unsigned short b, unsigned long port)
- {
- *(volatile unsigned short*)PORT2ADDR(port) = b;
- }
- void generic_outl(unsigned int b, unsigned long port)
- {
- *(volatile unsigned long*)PORT2ADDR(port) = b;
- }
- void generic_outb_p(unsigned char b, unsigned long port)
- {
- *(volatile unsigned char*)PORT2ADDR(port) = b;
- delay();
- }
- void generic_outw_p(unsigned short b, unsigned long port)
- {
- *(volatile unsigned short*)PORT2ADDR(port) = b;
- delay();
- }
- void generic_outl_p(unsigned int b, unsigned long port)
- {
- *(volatile unsigned long*)PORT2ADDR(port) = b;
- delay();
- }
- void generic_outsb(unsigned long port, const void *buffer, unsigned long count)
- {
- const unsigned char *buf=buffer;
- while(count--) outb(*buf++, port);
- }
- void generic_outsw(unsigned long port, const void *buffer, unsigned long count)
- {
- const unsigned short *buf=buffer;
- while(count--) outw(*buf++, port);
- #ifdef SH3_PCMCIA_BUG_WORKAROUND
- ctrl_inb (DUMMY_READ_AREA6);
- #endif
- }
- void generic_outsl(unsigned long port, const void *buffer, unsigned long count)
- {
- const unsigned long *buf=buffer;
- while(count--) outl(*buf++, port);
- #ifdef SH3_PCMCIA_BUG_WORKAROUND
- ctrl_inb (DUMMY_READ_AREA6);
- #endif
- }
- unsigned char generic_readb(unsigned long addr)
- {
- return *(volatile unsigned char*)addr;
- }
- unsigned short generic_readw(unsigned long addr)
- {
- return *(volatile unsigned short*)addr;
- }
- unsigned int generic_readl(unsigned long addr)
- {
- return *(volatile unsigned long*)addr;
- }
- void generic_writeb(unsigned char b, unsigned long addr)
- {
- *(volatile unsigned char*)addr = b;
- }
- void generic_writew(unsigned short b, unsigned long addr)
- {
- *(volatile unsigned short*)addr = b;
- }
- void generic_writel(unsigned int b, unsigned long addr)
- {
- *(volatile unsigned long*)addr = b;
- }
- void * generic_ioremap(unsigned long offset, unsigned long size)
- {
- return (void *) P2SEGADDR(offset);
- }
- EXPORT_SYMBOL(generic_ioremap);
- void generic_iounmap(void *addr)
- {
- }
- EXPORT_SYMBOL(generic_iounmap);
- unsigned long generic_isa_port2addr(unsigned long offset)
- {
- return offset + generic_io_base;
- }