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/*
* Implement the default iomap interfaces
*
* (C) Copyright 2004 Linus Torvalds
* (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
* (C) Copyright 2007 MIPS Technologies, Inc.
* written by Ralf Baechle <ralf@linux-mips.org>
*/
#include <linux/module.h>
#include <asm/io.h>
/*
* Read/write from/to an (offsettable) iomem cookie. It might be a PIO
* access or a MMIO access, these functions don't care. The info is
* encoded in the hardware mapping set up by the mapping functions
* (or the cookie itself, depending on implementation and hw).
*
* The generic routines don't assume any hardware mappings, and just
* encode the PIO/MMIO as part of the cookie. They coldly assume that
* the MMIO IO mappings are not in the low address range.
*
* Architectures for which this is not true can't use this generic
* implementation and should do their own copy.
*/
#define PIO_MASK 0x0ffffUL
unsigned int ioread8(void __iomem *addr)
{
return readb(addr);
}
EXPORT_SYMBOL(ioread8);
unsigned int ioread16(void __iomem *addr)
{
return readw(addr);
}
EXPORT_SYMBOL(ioread16);
unsigned int ioread16be(void __iomem *addr)
{
return be16_to_cpu(__raw_readw(addr));
}
EXPORT_SYMBOL(ioread16be);
unsigned int ioread32(void __iomem *addr)
{
return readl(addr);
}
EXPORT_SYMBOL(ioread32);
unsigned int ioread32be(void __iomem *addr)
{
return be32_to_cpu(__raw_readl(addr));
}
EXPORT_SYMBOL(ioread32be);
void iowrite8(u8 val, void __iomem *addr)
{
writeb(val, addr);
}
EXPORT_SYMBOL(iowrite8);
void iowrite16(u16 val, void __iomem *addr)
{
writew(val, addr);
}
EXPORT_SYMBOL(iowrite16);
void iowrite16be(u16 val, void __iomem *addr)
{
__raw_writew(cpu_to_be16(val), addr);
}
EXPORT_SYMBOL(iowrite16be);
void iowrite32(u32 val, void __iomem *addr)
{
writel(val, addr);
}
EXPORT_SYMBOL(iowrite32);
void iowrite32be(u32 val, void __iomem *addr)
{
__raw_writel(cpu_to_be32(val), addr);
}
EXPORT_SYMBOL(iowrite32be);
/*
* These are the "repeat MMIO read/write" functions.
* Note the "__raw" accesses, since we don't want to
* convert to CPU byte order. We write in "IO byte
* order" (we also don't have IO barriers).
*/
static inline void mmio_insb(void __iomem *addr, u8 *dst, int count)
{
while (--count >= 0) {
u8 data = __raw_readb(addr);
*dst = data;
dst++;
}
}
static inline void mmio_insw(void __iomem *addr, u16 *dst, int count)
{
while (--count >= 0) {
u16 data = __raw_readw(addr);
*dst = data;
dst++;
}
}
static inline void mmio_insl(void __iomem *addr, u32 *dst, int count)
{
while (--count >= 0) {
u32 data = __raw_readl(addr);
*dst = data;
dst++;
}
}
static inline void mmio_outsb(void __iomem *addr, const u8 *src, int count)
{
while (--count >= 0) {
__raw_writeb(*src, addr);
src++;
}
}
static inline void mmio_outsw(void __iomem *addr, const u16 *src, int count)
{
while (--count >= 0) {
__raw_writew(*src, addr);
src++;
}
}
static inline void mmio_outsl(void __iomem *addr, const u32 *src, int count)
{
while (--count >= 0) {
__raw_writel(*src, addr);
src++;
}
}
void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
{
mmio_insb(addr, dst, count);
}
EXPORT_SYMBOL(ioread8_rep);
void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
{
mmio_insw(addr, dst, count);
}
EXPORT_SYMBOL(ioread16_rep);
void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
{
mmio_insl(addr, dst, count);
}
EXPORT_SYMBOL(ioread32_rep);
void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
{
mmio_outsb(addr, src, count);
}
EXPORT_SYMBOL(iowrite8_rep);
void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
{
mmio_outsw(addr, src, count);
}
EXPORT_SYMBOL(iowrite16_rep);
void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
{
mmio_outsl(addr, src, count);
}
EXPORT_SYMBOL(iowrite32_rep);
/*
* Create a virtual mapping cookie for an IO port range
*
* This uses the same mapping are as the in/out family which has to be setup
* by the platform initialization code.
*
* Just to make matters somewhat more interesting on MIPS systems with
* multiple host bridge each will have it's own ioport address space.
*/
static void __iomem *ioport_map_legacy(unsigned long port, unsigned int nr)
{
return (void __iomem *) (mips_io_port_base + port);
}
void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
if (port > PIO_MASK)
return NULL;
return ioport_map_legacy(port, nr);
}
EXPORT_SYMBOL(ioport_map);
void ioport_unmap(void __iomem *addr)
{
/* Nothing to do */
}
EXPORT_SYMBOL(ioport_unmap);
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