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/*
* arch/ubicom32/mach-common/io.c
* PCI I/O memory read/write support functions.
*
* (C) Copyright 2009, Ubicom, Inc.
*
* This file is part of the Ubicom32 Linux Kernel Port.
*
* The Ubicom32 Linux Kernel Port 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.
*
* The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not,
* see <http://www.gnu.org/licenses/>.
*
* Ubicom32 implementation derived from (with many thanks):
* arch/m68knommu
* arch/blackfin
* arch/parisc
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/io.h>
#ifdef CONFIG_PCI
unsigned char ioread8(void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
return ubi32_pci_read_u8(addr);
else
return (unsigned char)(*(volatile unsigned char *)addr);
}
EXPORT_SYMBOL(ioread8);
unsigned short ioread16(void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
return ubi32_pci_read_u16(addr);
else
return (unsigned short)(*(volatile unsigned short *)addr);
}
EXPORT_SYMBOL(ioread16);
unsigned int ioread32(void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
return ubi32_pci_read_u32(addr);
else
return (unsigned int)(*(volatile unsigned int *)addr);
}
EXPORT_SYMBOL(ioread32);
void iowrite32(unsigned int val, void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
ubi32_pci_write_u32(val, addr);
else
*(volatile unsigned int *)addr = val;
}
EXPORT_SYMBOL(iowrite32);
void iowrite16(unsigned short val, void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
ubi32_pci_write_u16(val, addr);
else
*(volatile unsigned short *)addr = val;
}
EXPORT_SYMBOL(iowrite16);
void iowrite8(unsigned char val, void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
ubi32_pci_write_u8(val, addr);
else
*(volatile unsigned char *)addr = val;
}
EXPORT_SYMBOL(iowrite8);
void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned len)
{
if (IS_PCI_ADDRESS(from)) {
if ((((u32_t)from & 0x3) == 0) && (((u32_t)to & 0x3) == 0)) {
while ((int)len >= 4) {
*(u32_t *)to = ubi32_pci_read_u32(from);
to += 4;
from += 4;
len -= 4;
}
} else if ((((u32_t)from & 0x1) == 0) &&
(((u32_t)to & 0x1) == 0)) {
while ((int)len >= 2) {
*(u16_t *)to = ubi32_pci_read_u16(from);
to += 2;
from += 2;
len -= 2;
}
}
while (len) {
*(u8_t *)to = ubi32_pci_read_u8(from);
to++;
from++;
len--;
}
} else
memcpy(to, (void *)from, len);
}
EXPORT_SYMBOL(memcpy_fromio);
void memcpy_toio(volatile void __iomem *to, const void *from, unsigned len)
{
if (IS_PCI_ADDRESS(to)) {
if ((((u32_t)from & 0x3) == 0) && (((u32_t)to & 0x3) == 0)) {
while ((int)len >= 4) {
ubi32_pci_write_u32(*(u32_t *)from, to);
to += 4;
from += 4;
len -= 4;
}
} else if ((((u32_t)from & 0x1) == 0) &&
(((u32_t)to & 0x1) == 0)) {
while ((int)len >= 2) {
ubi32_pci_write_u16(*(u16_t *)from, to);
to += 2;
from += 2;
len -= 2;
}
}
while (len) {
ubi32_pci_write_u8(*(u8_t *)from, to);
from++;
to++;
len--;
}
} else
memcpy((void *)to, from, len);
}
EXPORT_SYMBOL(memcpy_toio);
void memset_io(volatile void __iomem *addr, int val, size_t len)
{
if (IS_PCI_ADDRESS(addr)) {
while (len) {
ubi32_pci_write_u8((unsigned char)val, addr);
addr++;
len--;
}
} else
memset((void *)addr, val, len);
}
EXPORT_SYMBOL(memset_io);
void ioread8_rep(void __iomem *port, void *buf, unsigned long count)
{
if (IS_PCI_ADDRESS(port)) {
while (count) {
*(u8_t *)buf = ioread8(port);
buf++;
count--;
}
} else {
insb((unsigned int)port, buf, count);
}
}
EXPORT_SYMBOL(ioread8_rep);
void ioread16_rep(void __iomem *port, void *buf, unsigned long count)
{
if (IS_PCI_ADDRESS(port)) {
while (count) {
*(u16_t *)buf = ioread16(port);
buf += 2;
count--;
}
} else {
insw((unsigned int)port, buf, count);
}
}
EXPORT_SYMBOL(ioread16_rep);
void ioread32_rep(void __iomem *port, void *buf, unsigned long count)
{
if (IS_PCI_ADDRESS(port)) {
while (count) {
*(u32_t *)buf = ioread32(port);
buf += 4;
count--;
}
} else {
insl((unsigned int)port, buf, count);
}
}
EXPORT_SYMBOL(ioread32_rep);
void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count)
{
if (IS_PCI_ADDRESS(port)) {
while (count) {
iowrite8(*(u8_t *)buf, port);
buf++;
count--;
}
} else {
outsb((unsigned int)port, buf, count);
}
}
EXPORT_SYMBOL(iowrite8_rep);
void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count)
{
if (IS_PCI_ADDRESS(port)) {
while (count) {
iowrite16(*(u16_t *)buf, port);
buf += 2;
count--;
}
} else {
outsw((unsigned int)port, buf, count);
}
}
EXPORT_SYMBOL(iowrite16_rep);
void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count)
{
if (IS_PCI_ADDRESS(port)) {
while (count) {
iowrite32(*(u32_t *)buf, port);
buf += 4;
count--;
}
} else {
outsl((unsigned int)port, buf, count);
}
}
EXPORT_SYMBOL(iowrite32_rep);
#endif /* CONFIG_PCI */
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