WSL2-Linux-Kernel/arch/sh/kernel/io_generic.c

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5.1 KiB
C

/* $Id: io_generic.c,v 1.2 2003/05/04 19:29:53 lethal 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(CONFIG_CPU_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;
}
/*
* insb/w/l all read a series of bytes/words/longs from a fixed port
* address. However as the port address doesn't change we only need to
* convert the port address to real address once.
*/
void generic_insb(unsigned long port, void *buffer, unsigned long count)
{
volatile unsigned char *port_addr;
unsigned char *buf=buffer;
port_addr = (volatile unsigned char *)PORT2ADDR(port);
while(count--)
*buf++ = *port_addr;
}
void generic_insw(unsigned long port, void *buffer, unsigned long count)
{
volatile unsigned short *port_addr;
unsigned short *buf=buffer;
port_addr = (volatile unsigned short *)PORT2ADDR(port);
while(count--)
*buf++ = *port_addr;
#ifdef SH3_PCMCIA_BUG_WORKAROUND
ctrl_inb (DUMMY_READ_AREA6);
#endif
}
void generic_insl(unsigned long port, void *buffer, unsigned long count)
{
volatile unsigned long *port_addr;
unsigned long *buf=buffer;
port_addr = (volatile unsigned long *)PORT2ADDR(port);
while(count--)
*buf++ = *port_addr;
#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();
}
/*
* outsb/w/l all write a series of bytes/words/longs to a fixed port
* address. However as the port address doesn't change we only need to
* convert the port address to real address once.
*/
void generic_outsb(unsigned long port, const void *buffer, unsigned long count)
{
volatile unsigned char *port_addr;
const unsigned char *buf=buffer;
port_addr = (volatile unsigned char *)PORT2ADDR(port);
while(count--)
*port_addr = *buf++;
}
void generic_outsw(unsigned long port, const void *buffer, unsigned long count)
{
volatile unsigned short *port_addr;
const unsigned short *buf=buffer;
port_addr = (volatile unsigned short *)PORT2ADDR(port);
while(count--)
*port_addr = *buf++;
#ifdef SH3_PCMCIA_BUG_WORKAROUND
ctrl_inb (DUMMY_READ_AREA6);
#endif
}
void generic_outsl(unsigned long port, const void *buffer, unsigned long count)
{
volatile unsigned long *port_addr;
const unsigned long *buf=buffer;
port_addr = (volatile unsigned long *)PORT2ADDR(port);
while(count--)
*port_addr = *buf++;
#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;
}