420 lines
8.5 KiB
C
420 lines
8.5 KiB
C
/*
|
|
* linux/arch/arm/mach-ebsa110/isamem.c
|
|
*
|
|
* Copyright (C) 2001 Russell King
|
|
*
|
|
* Perform "ISA" memory and IO accesses. The EBSA110 has some "peculiarities"
|
|
* in the way it handles accesses to odd IO ports on 16-bit devices. These
|
|
* devices have their D0-D15 lines connected to the processors D0-D15 lines.
|
|
* Since they expect all byte IO operations to be performed on D0-D7, and the
|
|
* StrongARM expects to transfer the byte to these odd addresses on D8-D15,
|
|
* we must use a trick to get the required behaviour.
|
|
*
|
|
* The trick employed here is to use long word stores to odd address -1. The
|
|
* glue logic picks this up as a "trick" access, and asserts the LSB of the
|
|
* peripherals address bus, thereby accessing the odd IO port. Meanwhile, the
|
|
* StrongARM transfers its data on D0-D7 as expected.
|
|
*
|
|
* Things get more interesting on the pass-1 EBSA110 - the PCMCIA controller
|
|
* wiring was screwed in such a way that it had limited memory space access.
|
|
* Luckily, the work-around for this is not too horrible. See
|
|
* __isamem_convert_addr for the details.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/page.h>
|
|
|
|
static void __iomem *__isamem_convert_addr(const volatile void __iomem *addr)
|
|
{
|
|
u32 ret, a = (u32 __force) addr;
|
|
|
|
/*
|
|
* The PCMCIA controller is wired up as follows:
|
|
* +---------+---------+---------+---------+---------+---------+
|
|
* PCMCIA | 2 2 2 2 | 1 1 1 1 | 1 1 1 1 | 1 1 | | |
|
|
* | 3 2 1 0 | 9 8 7 6 | 5 4 3 2 | 1 0 9 8 | 7 6 5 4 | 3 2 1 0 |
|
|
* +---------+---------+---------+---------+---------+---------+
|
|
* CPU | 2 2 2 2 | 2 1 1 1 | 1 1 1 1 | 1 1 1 | | |
|
|
* | 4 3 2 1 | 0 9 9 8 | 7 6 5 4 | 3 2 0 9 | 8 7 6 5 | 4 3 2 x |
|
|
* +---------+---------+---------+---------+---------+---------+
|
|
*
|
|
* This means that we can access PCMCIA regions as follows:
|
|
* 0x*10000 -> 0x*1ffff
|
|
* 0x*70000 -> 0x*7ffff
|
|
* 0x*90000 -> 0x*9ffff
|
|
* 0x*f0000 -> 0x*fffff
|
|
*/
|
|
ret = (a & 0xf803fe) << 1;
|
|
ret |= (a & 0x03fc00) << 2;
|
|
|
|
ret += 0xe8000000;
|
|
|
|
if ((a & 0x20000) == (a & 0x40000) >> 1)
|
|
return (void __iomem *)ret;
|
|
|
|
BUG();
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* read[bwl] and write[bwl]
|
|
*/
|
|
u8 __readb(const volatile void __iomem *addr)
|
|
{
|
|
void __iomem *a = __isamem_convert_addr(addr);
|
|
u32 ret;
|
|
|
|
if ((unsigned long)addr & 1)
|
|
ret = __raw_readl(a);
|
|
else
|
|
ret = __raw_readb(a);
|
|
return ret;
|
|
}
|
|
|
|
u16 __readw(const volatile void __iomem *addr)
|
|
{
|
|
void __iomem *a = __isamem_convert_addr(addr);
|
|
|
|
if ((unsigned long)addr & 1)
|
|
BUG();
|
|
|
|
return __raw_readw(a);
|
|
}
|
|
|
|
u32 __readl(const volatile void __iomem *addr)
|
|
{
|
|
void __iomem *a = __isamem_convert_addr(addr);
|
|
u32 ret;
|
|
|
|
if ((unsigned long)addr & 3)
|
|
BUG();
|
|
|
|
ret = __raw_readw(a);
|
|
ret |= __raw_readw(a + 4) << 16;
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL(__readb);
|
|
EXPORT_SYMBOL(__readw);
|
|
EXPORT_SYMBOL(__readl);
|
|
|
|
void readsw(const void __iomem *addr, void *data, int len)
|
|
{
|
|
void __iomem *a = __isamem_convert_addr(addr);
|
|
|
|
BUG_ON((unsigned long)addr & 1);
|
|
|
|
__raw_readsw(a, data, len);
|
|
}
|
|
EXPORT_SYMBOL(readsw);
|
|
|
|
void readsl(const void __iomem *addr, void *data, int len)
|
|
{
|
|
void __iomem *a = __isamem_convert_addr(addr);
|
|
|
|
BUG_ON((unsigned long)addr & 3);
|
|
|
|
__raw_readsl(a, data, len);
|
|
}
|
|
EXPORT_SYMBOL(readsl);
|
|
|
|
void __writeb(u8 val, void __iomem *addr)
|
|
{
|
|
void __iomem *a = __isamem_convert_addr(addr);
|
|
|
|
if ((unsigned long)addr & 1)
|
|
__raw_writel(val, a);
|
|
else
|
|
__raw_writeb(val, a);
|
|
}
|
|
|
|
void __writew(u16 val, void __iomem *addr)
|
|
{
|
|
void __iomem *a = __isamem_convert_addr(addr);
|
|
|
|
if ((unsigned long)addr & 1)
|
|
BUG();
|
|
|
|
__raw_writew(val, a);
|
|
}
|
|
|
|
void __writel(u32 val, void __iomem *addr)
|
|
{
|
|
void __iomem *a = __isamem_convert_addr(addr);
|
|
|
|
if ((unsigned long)addr & 3)
|
|
BUG();
|
|
|
|
__raw_writew(val, a);
|
|
__raw_writew(val >> 16, a + 4);
|
|
}
|
|
|
|
EXPORT_SYMBOL(__writeb);
|
|
EXPORT_SYMBOL(__writew);
|
|
EXPORT_SYMBOL(__writel);
|
|
|
|
void writesw(void __iomem *addr, const void *data, int len)
|
|
{
|
|
void __iomem *a = __isamem_convert_addr(addr);
|
|
|
|
BUG_ON((unsigned long)addr & 1);
|
|
|
|
__raw_writesw(a, data, len);
|
|
}
|
|
EXPORT_SYMBOL(writesw);
|
|
|
|
void writesl(void __iomem *addr, const void *data, int len)
|
|
{
|
|
void __iomem *a = __isamem_convert_addr(addr);
|
|
|
|
BUG_ON((unsigned long)addr & 3);
|
|
|
|
__raw_writesl(a, data, len);
|
|
}
|
|
EXPORT_SYMBOL(writesl);
|
|
|
|
#define SUPERIO_PORT(p) \
|
|
(((p) >> 3) == (0x3f8 >> 3) || \
|
|
((p) >> 3) == (0x2f8 >> 3) || \
|
|
((p) >> 3) == (0x378 >> 3))
|
|
|
|
/*
|
|
* We're addressing an 8 or 16-bit peripheral which tranfers
|
|
* odd addresses on the low ISA byte lane.
|
|
*/
|
|
u8 __inb8(unsigned int port)
|
|
{
|
|
u32 ret;
|
|
|
|
/*
|
|
* The SuperIO registers use sane addressing techniques...
|
|
*/
|
|
if (SUPERIO_PORT(port))
|
|
ret = __raw_readb((void __iomem *)ISAIO_BASE + (port << 2));
|
|
else {
|
|
void __iomem *a = (void __iomem *)ISAIO_BASE + ((port & ~1) << 1);
|
|
|
|
/*
|
|
* Shame nothing else does
|
|
*/
|
|
if (port & 1)
|
|
ret = __raw_readl(a);
|
|
else
|
|
ret = __raw_readb(a);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* We're addressing a 16-bit peripheral which transfers odd
|
|
* addresses on the high ISA byte lane.
|
|
*/
|
|
u8 __inb16(unsigned int port)
|
|
{
|
|
unsigned int offset;
|
|
|
|
/*
|
|
* The SuperIO registers use sane addressing techniques...
|
|
*/
|
|
if (SUPERIO_PORT(port))
|
|
offset = port << 2;
|
|
else
|
|
offset = (port & ~1) << 1 | (port & 1);
|
|
|
|
return __raw_readb((void __iomem *)ISAIO_BASE + offset);
|
|
}
|
|
|
|
u16 __inw(unsigned int port)
|
|
{
|
|
unsigned int offset;
|
|
|
|
/*
|
|
* The SuperIO registers use sane addressing techniques...
|
|
*/
|
|
if (SUPERIO_PORT(port))
|
|
offset = port << 2;
|
|
else {
|
|
offset = port << 1;
|
|
BUG_ON(port & 1);
|
|
}
|
|
return __raw_readw((void __iomem *)ISAIO_BASE + offset);
|
|
}
|
|
|
|
/*
|
|
* Fake a 32-bit read with two 16-bit reads. Needed for 3c589.
|
|
*/
|
|
u32 __inl(unsigned int port)
|
|
{
|
|
void __iomem *a;
|
|
|
|
if (SUPERIO_PORT(port) || port & 3)
|
|
BUG();
|
|
|
|
a = (void __iomem *)ISAIO_BASE + ((port & ~1) << 1);
|
|
|
|
return __raw_readw(a) | __raw_readw(a + 4) << 16;
|
|
}
|
|
|
|
EXPORT_SYMBOL(__inb8);
|
|
EXPORT_SYMBOL(__inb16);
|
|
EXPORT_SYMBOL(__inw);
|
|
EXPORT_SYMBOL(__inl);
|
|
|
|
void __outb8(u8 val, unsigned int port)
|
|
{
|
|
/*
|
|
* The SuperIO registers use sane addressing techniques...
|
|
*/
|
|
if (SUPERIO_PORT(port))
|
|
__raw_writeb(val, (void __iomem *)ISAIO_BASE + (port << 2));
|
|
else {
|
|
void __iomem *a = (void __iomem *)ISAIO_BASE + ((port & ~1) << 1);
|
|
|
|
/*
|
|
* Shame nothing else does
|
|
*/
|
|
if (port & 1)
|
|
__raw_writel(val, a);
|
|
else
|
|
__raw_writeb(val, a);
|
|
}
|
|
}
|
|
|
|
void __outb16(u8 val, unsigned int port)
|
|
{
|
|
unsigned int offset;
|
|
|
|
/*
|
|
* The SuperIO registers use sane addressing techniques...
|
|
*/
|
|
if (SUPERIO_PORT(port))
|
|
offset = port << 2;
|
|
else
|
|
offset = (port & ~1) << 1 | (port & 1);
|
|
|
|
__raw_writeb(val, (void __iomem *)ISAIO_BASE + offset);
|
|
}
|
|
|
|
void __outw(u16 val, unsigned int port)
|
|
{
|
|
unsigned int offset;
|
|
|
|
/*
|
|
* The SuperIO registers use sane addressing techniques...
|
|
*/
|
|
if (SUPERIO_PORT(port))
|
|
offset = port << 2;
|
|
else {
|
|
offset = port << 1;
|
|
BUG_ON(port & 1);
|
|
}
|
|
__raw_writew(val, (void __iomem *)ISAIO_BASE + offset);
|
|
}
|
|
|
|
void __outl(u32 val, unsigned int port)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
EXPORT_SYMBOL(__outb8);
|
|
EXPORT_SYMBOL(__outb16);
|
|
EXPORT_SYMBOL(__outw);
|
|
EXPORT_SYMBOL(__outl);
|
|
|
|
void outsb(unsigned int port, const void *from, int len)
|
|
{
|
|
u32 off;
|
|
|
|
if (SUPERIO_PORT(port))
|
|
off = port << 2;
|
|
else {
|
|
off = (port & ~1) << 1;
|
|
if (port & 1)
|
|
BUG();
|
|
}
|
|
|
|
__raw_writesb((void __iomem *)ISAIO_BASE + off, from, len);
|
|
}
|
|
|
|
void insb(unsigned int port, void *from, int len)
|
|
{
|
|
u32 off;
|
|
|
|
if (SUPERIO_PORT(port))
|
|
off = port << 2;
|
|
else {
|
|
off = (port & ~1) << 1;
|
|
if (port & 1)
|
|
BUG();
|
|
}
|
|
|
|
__raw_readsb((void __iomem *)ISAIO_BASE + off, from, len);
|
|
}
|
|
|
|
EXPORT_SYMBOL(outsb);
|
|
EXPORT_SYMBOL(insb);
|
|
|
|
void outsw(unsigned int port, const void *from, int len)
|
|
{
|
|
u32 off;
|
|
|
|
if (SUPERIO_PORT(port))
|
|
off = port << 2;
|
|
else {
|
|
off = (port & ~1) << 1;
|
|
if (port & 1)
|
|
BUG();
|
|
}
|
|
|
|
__raw_writesw((void __iomem *)ISAIO_BASE + off, from, len);
|
|
}
|
|
|
|
void insw(unsigned int port, void *from, int len)
|
|
{
|
|
u32 off;
|
|
|
|
if (SUPERIO_PORT(port))
|
|
off = port << 2;
|
|
else {
|
|
off = (port & ~1) << 1;
|
|
if (port & 1)
|
|
BUG();
|
|
}
|
|
|
|
__raw_readsw((void __iomem *)ISAIO_BASE + off, from, len);
|
|
}
|
|
|
|
EXPORT_SYMBOL(outsw);
|
|
EXPORT_SYMBOL(insw);
|
|
|
|
/*
|
|
* We implement these as 16-bit insw/outsw, mainly for
|
|
* 3c589 cards.
|
|
*/
|
|
void outsl(unsigned int port, const void *from, int len)
|
|
{
|
|
u32 off = port << 1;
|
|
|
|
if (SUPERIO_PORT(port) || port & 3)
|
|
BUG();
|
|
|
|
__raw_writesw((void __iomem *)ISAIO_BASE + off, from, len << 1);
|
|
}
|
|
|
|
void insl(unsigned int port, void *from, int len)
|
|
{
|
|
u32 off = port << 1;
|
|
|
|
if (SUPERIO_PORT(port) || port & 3)
|
|
BUG();
|
|
|
|
__raw_readsw((void __iomem *)ISAIO_BASE + off, from, len << 1);
|
|
}
|
|
|
|
EXPORT_SYMBOL(outsl);
|
|
EXPORT_SYMBOL(insl);
|