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/*
* arch/sh/kernel/io_generic.c
*
* Copyright (C) 2000 Niibe Yutaka
* Copyright (C) 2005 - 2007 Paul Mundt
*
* 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 <linux/module.h>
#include <linux/io.h>
#include <asm/machvec.h>
#ifdef CONFIG_CPU_SH3
/* SH3 has a PCMCIA bug that needs a dummy read from area 6 for a
* workaround. */
/* I'm not sure SH7709 has this kind of bug */
#define dummy_read() ctrl_inb(0xba000000)
#else
#define dummy_read()
#endif
unsigned long generic_io_base;
static inline void delay(void)
{
ctrl_inw(0xa0000000);
}
u8 generic_inb(unsigned long port)
{
return ctrl_inb((unsigned long __force)__ioport_map(port, 1));
}
u16 generic_inw(unsigned long port)
{
return ctrl_inw((unsigned long __force)__ioport_map(port, 2));
}
u32 generic_inl(unsigned long port)
{
return ctrl_inl((unsigned long __force)__ioport_map(port, 4));
}
u8 generic_inb_p(unsigned long port)
{
unsigned long v = generic_inb(port);
delay();
return v;
}
u16 generic_inw_p(unsigned long port)
{
unsigned long v = generic_inw(port);
delay();
return v;
}
u32 generic_inl_p(unsigned long port)
{
unsigned long v = generic_inl(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 *dst, unsigned long count)
{
volatile u8 *port_addr;
u8 *buf = dst;
port_addr = (volatile u8 *)__ioport_map(port, 1);
while (count--)
*buf++ = *port_addr;
}
void generic_insw(unsigned long port, void *dst, unsigned long count)
{
volatile u16 *port_addr;
u16 *buf = dst;
port_addr = (volatile u16 *)__ioport_map(port, 2);
while (count--)
*buf++ = *port_addr;
dummy_read();
}
void generic_insl(unsigned long port, void *dst, unsigned long count)
{
volatile u32 *port_addr;
u32 *buf = dst;
port_addr = (volatile u32 *)__ioport_map(port, 4);
while (count--)
*buf++ = *port_addr;
dummy_read();
}
void generic_outb(u8 b, unsigned long port)
{
ctrl_outb(b, (unsigned long __force)__ioport_map(port, 1));
}
void generic_outw(u16 b, unsigned long port)
{
ctrl_outw(b, (unsigned long __force)__ioport_map(port, 2));
}
void generic_outl(u32 b, unsigned long port)
{
ctrl_outl(b, (unsigned long __force)__ioport_map(port, 4));
}
void generic_outb_p(u8 b, unsigned long port)
{
generic_outb(b, port);
delay();
}
void generic_outw_p(u16 b, unsigned long port)
{
generic_outw(b, port);
delay();
}
void generic_outl_p(u32 b, unsigned long port)
{
generic_outl(b, port);
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 *src, unsigned long count)
{
volatile u8 *port_addr;
const u8 *buf = src;
port_addr = (volatile u8 __force *)__ioport_map(port, 1);
while (count--)
*port_addr = *buf++;
}
void generic_outsw(unsigned long port, const void *src, unsigned long count)
{
volatile u16 *port_addr;
const u16 *buf = src;
port_addr = (volatile u16 __force *)__ioport_map(port, 2);
while (count--)
*port_addr = *buf++;
dummy_read();
}
void generic_outsl(unsigned long port, const void *src, unsigned long count)
{
volatile u32 *port_addr;
const u32 *buf = src;
port_addr = (volatile u32 __force *)__ioport_map(port, 4);
while (count--)
*port_addr = *buf++;
dummy_read();
}
u8 generic_readb(void __iomem *addr)
{
return ctrl_inb((unsigned long __force)addr);
}
u16 generic_readw(void __iomem *addr)
{
return ctrl_inw((unsigned long __force)addr);
}
u32 generic_readl(void __iomem *addr)
{
return ctrl_inl((unsigned long __force)addr);
}
void generic_writeb(u8 b, void __iomem *addr)
{
ctrl_outb(b, (unsigned long __force)addr);
}
void generic_writew(u16 b, void __iomem *addr)
{
ctrl_outw(b, (unsigned long __force)addr);
}
void generic_writel(u32 b, void __iomem *addr)
{
ctrl_outl(b, (unsigned long __force)addr);
}
void __iomem *generic_ioport_map(unsigned long addr, unsigned int size)
{
return (void __iomem *)(addr + generic_io_base);
}
void generic_ioport_unmap(void __iomem *addr)
{
}
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