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/* $Id: io.c,v 1.5 2004/02/22 23:08:43 kkojima Exp $
*
* linux/arch/sh/kernel/io_se.c
*
* Copyright (C) 2000 Kazumoto Kojima
*
* I/O routine for Hitachi SolutionEngine.
*
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <asm/io.h>
#include <asm/se/se.h>
/* SH pcmcia io window base, start and end. */
int sh_pcic_io_wbase = 0xb8400000;
int sh_pcic_io_start;
int sh_pcic_io_stop;
int sh_pcic_io_type;
int sh_pcic_io_dummy;
static inline void delay(void)
{
ctrl_inw(0xa0000000);
}
/* MS7750 requires special versions of in*, out* routines, since
PC-like io ports are located at upper half byte of 16-bit word which
can be accessed only with 16-bit wide. */
static inline volatile __u16 *
port2adr(unsigned int port)
{
if (port >= 0x2000)
return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
else if (port >= 0x1000)
return (volatile __u16 *) (PA_83902 + (port << 1));
else if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
return (volatile __u16 *) (sh_pcic_io_wbase + (port &~ 1));
else
return (volatile __u16 *) (PA_SUPERIO + (port << 1));
}
static inline int
shifted_port(unsigned long port)
{
/* For IDE registers, value is not shifted */
if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
return 0;
else
return 1;
}
#define maybebadio(name,port) \
printk("bad PC-like io %s for port 0x%lx at 0x%08x\n", \
#name, (port), (__u32) __builtin_return_address(0))
unsigned char se_inb(unsigned long port)
{
if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
return *(__u8 *) (sh_pcic_io_wbase + 0x40000 + port);
else if (shifted_port(port))
return (*port2adr(port) >> 8);
else
return (*port2adr(port))&0xff;
}
unsigned char se_inb_p(unsigned long port)
{
unsigned long v;
if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
v = *(__u8 *) (sh_pcic_io_wbase + 0x40000 + port);
else if (shifted_port(port))
v = (*port2adr(port) >> 8);
else
v = (*port2adr(port))&0xff;
delay();
return v;
}
unsigned short se_inw(unsigned long port)
{
if (port >= 0x2000 ||
(sh_pcic_io_start <= port && port <= sh_pcic_io_stop))
return *port2adr(port);
else
maybebadio(inw, port);
return 0;
}
unsigned int se_inl(unsigned long port)
{
maybebadio(inl, port);
return 0;
}
void se_outb(unsigned char value, unsigned long port)
{
if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
*(__u8 *)(sh_pcic_io_wbase + port) = value;
else if (shifted_port(port))
*(port2adr(port)) = value << 8;
else
*(port2adr(port)) = value;
}
void se_outb_p(unsigned char value, unsigned long port)
{
if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
*(__u8 *)(sh_pcic_io_wbase + port) = value;
else if (shifted_port(port))
*(port2adr(port)) = value << 8;
else
*(port2adr(port)) = value;
delay();
}
void se_outw(unsigned short value, unsigned long port)
{
if (port >= 0x2000 ||
(sh_pcic_io_start <= port && port <= sh_pcic_io_stop))
*port2adr(port) = value;
else
maybebadio(outw, port);
}
void se_outl(unsigned int value, unsigned long port)
{
maybebadio(outl, port);
}
void se_insb(unsigned long port, void *addr, unsigned long count)
{
volatile __u16 *p = port2adr(port);
__u8 *ap = addr;
if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) {
volatile __u8 *bp = (__u8 *) (sh_pcic_io_wbase + 0x40000 + port);
while (count--)
*ap++ = *bp;
} else if (shifted_port(port)) {
while (count--)
*ap++ = *p >> 8;
} else {
while (count--)
*ap++ = *p;
}
}
void se_insw(unsigned long port, void *addr, unsigned long count)
{
volatile __u16 *p = port2adr(port);
__u16 *ap = addr;
while (count--)
*ap++ = *p;
}
void se_insl(unsigned long port, void *addr, unsigned long count)
{
maybebadio(insl, port);
}
void se_outsb(unsigned long port, const void *addr, unsigned long count)
{
volatile __u16 *p = port2adr(port);
const __u8 *ap = addr;
if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) {
volatile __u8 *bp = (__u8 *) (sh_pcic_io_wbase + port);
while (count--)
*bp = *ap++;
} else if (shifted_port(port)) {
while (count--)
*p = *ap++ << 8;
} else {
while (count--)
*p = *ap++;
}
}
void se_outsw(unsigned long port, const void *addr, unsigned long count)
{
volatile __u16 *p = port2adr(port);
const __u16 *ap = addr;
while (count--)
*p = *ap++;
}
void se_outsl(unsigned long port, const void *addr, unsigned long count)
{
maybebadio(outsw, port);
}
/* Map ISA bus address to the real address. Only for PCMCIA. */
/* ISA page descriptor. */
static __u32 sh_isa_memmap[256];
static int
sh_isa_mmap(__u32 start, __u32 length, __u32 offset)
{
int idx;
if (start >= 0x100000 || (start & 0xfff) || (length != 0x1000))
return -1;
idx = start >> 12;
sh_isa_memmap[idx] = 0xb8000000 + (offset &~ 0xfff);
#if 0
printk("sh_isa_mmap: start %x len %x offset %x (idx %x paddr %x)\n",
start, length, offset, idx, sh_isa_memmap[idx]);
#endif
return 0;
}
unsigned long
se_isa_port2addr(unsigned long offset)
{
int idx;
idx = (offset >> 12) & 0xff;
offset &= 0xfff;
return sh_isa_memmap[idx] + offset;
}
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