1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
245 lines
6.5 KiB
C
245 lines
6.5 KiB
C
/*
|
|
* linux/arch/sh/kernel/io_7751se.c
|
|
*
|
|
* Copyright (C) 2001 Ian da Silva, Jeremy Siegel
|
|
* Based largely on io_se.c.
|
|
*
|
|
* I/O routine for Hitachi 7751 SolutionEngine.
|
|
*
|
|
* Initial version only to support LAN access; some
|
|
* placeholder code from io_se.c left in with the
|
|
* expectation of later SuperIO and PCMCIA access.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <asm/io.h>
|
|
#include <asm/se7751/se7751.h>
|
|
#include <asm/addrspace.h>
|
|
|
|
#include <linux/pci.h>
|
|
#include "../../../drivers/pci/pci-sh7751.h"
|
|
|
|
#if 0
|
|
/******************************************************************
|
|
* Variables from io_se.c, related to PCMCIA (not PCI); we're not
|
|
* compiling them in, and have removed references from functions
|
|
* which follow. [Many checked for IO ports in the range bounded
|
|
* by sh_pcic_io_start/stop, and used sh_pcic_io_wbase as offset.
|
|
* As start/stop are uninitialized, only port 0x0 would match?]
|
|
* When used, remember to adjust names to avoid clash with io_se?
|
|
*****************************************************************/
|
|
/* 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;
|
|
/*************************************************************/
|
|
#endif
|
|
|
|
/*
|
|
* The 7751 Solution Engine uses the built-in PCI controller (PCIC)
|
|
* of the 7751 processor, and has a SuperIO accessible via the PCI.
|
|
* The board also includes a PCMCIA controller on its memory bus,
|
|
* like the other Solution Engine boards.
|
|
*/
|
|
|
|
#define PCIIOBR (volatile long *)PCI_REG(SH7751_PCIIOBR)
|
|
#define PCIMBR (volatile long *)PCI_REG(SH7751_PCIMBR)
|
|
#define PCI_IO_AREA SH7751_PCI_IO_BASE
|
|
#define PCI_MEM_AREA SH7751_PCI_CONFIG_BASE
|
|
|
|
#define PCI_IOMAP(adr) (PCI_IO_AREA + (adr & ~SH7751_PCIIOBR_MASK))
|
|
|
|
#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))
|
|
|
|
static inline void delay(void)
|
|
{
|
|
ctrl_inw(0xa0000000);
|
|
}
|
|
|
|
static inline volatile __u16 *
|
|
port2adr(unsigned int port)
|
|
{
|
|
if (port >= 0x2000)
|
|
return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
|
|
#if 0
|
|
else
|
|
return (volatile __u16 *) (PA_SUPERIO + (port << 1));
|
|
#endif
|
|
maybebadio(name,(unsigned long)port);
|
|
return (volatile __u16*)port;
|
|
}
|
|
|
|
#if 0
|
|
/* The 7751 Solution Engine seems to have everything hooked */
|
|
/* up pretty normally (nothing on high-bytes only...) so this */
|
|
/* shouldn't be needed */
|
|
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;
|
|
}
|
|
#endif
|
|
|
|
/* In case someone configures the kernel w/o PCI support: in that */
|
|
/* scenario, don't ever bother to check for PCI-window addresses */
|
|
|
|
/* NOTE: WINDOW CHECK MAY BE A BIT OFF, HIGH PCIBIOS_MIN_IO WRAPS? */
|
|
#if defined(CONFIG_PCI)
|
|
#define CHECK_SH7751_PCIIO(port) \
|
|
((port >= PCIBIOS_MIN_IO) && (port < (PCIBIOS_MIN_IO + SH7751_PCI_IO_SIZE)))
|
|
#else
|
|
#define CHECK_SH7751_PCIIO(port) (0)
|
|
#endif
|
|
|
|
/*
|
|
* General outline: remap really low stuff [eventually] to SuperIO,
|
|
* stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
|
|
* is mapped through the PCI IO window. Stuff with high bits (PXSEG)
|
|
* should be way beyond the window, and is used w/o translation for
|
|
* compatibility.
|
|
*/
|
|
unsigned char sh7751se_inb(unsigned long port)
|
|
{
|
|
if (PXSEG(port))
|
|
return *(volatile unsigned char *)port;
|
|
else if (CHECK_SH7751_PCIIO(port))
|
|
return *(volatile unsigned char *)PCI_IOMAP(port);
|
|
else
|
|
return (*port2adr(port))&0xff;
|
|
}
|
|
|
|
unsigned char sh7751se_inb_p(unsigned long port)
|
|
{
|
|
unsigned char v;
|
|
|
|
if (PXSEG(port))
|
|
v = *(volatile unsigned char *)port;
|
|
else if (CHECK_SH7751_PCIIO(port))
|
|
v = *(volatile unsigned char *)PCI_IOMAP(port);
|
|
else
|
|
v = (*port2adr(port))&0xff;
|
|
delay();
|
|
return v;
|
|
}
|
|
|
|
unsigned short sh7751se_inw(unsigned long port)
|
|
{
|
|
if (PXSEG(port))
|
|
return *(volatile unsigned short *)port;
|
|
else if (CHECK_SH7751_PCIIO(port))
|
|
return *(volatile unsigned short *)PCI_IOMAP(port);
|
|
else if (port >= 0x2000)
|
|
return *port2adr(port);
|
|
else
|
|
maybebadio(inw, port);
|
|
return 0;
|
|
}
|
|
|
|
unsigned int sh7751se_inl(unsigned long port)
|
|
{
|
|
if (PXSEG(port))
|
|
return *(volatile unsigned long *)port;
|
|
else if (CHECK_SH7751_PCIIO(port))
|
|
return *(volatile unsigned int *)PCI_IOMAP(port);
|
|
else if (port >= 0x2000)
|
|
return *port2adr(port);
|
|
else
|
|
maybebadio(inl, port);
|
|
return 0;
|
|
}
|
|
|
|
void sh7751se_outb(unsigned char value, unsigned long port)
|
|
{
|
|
|
|
if (PXSEG(port))
|
|
*(volatile unsigned char *)port = value;
|
|
else if (CHECK_SH7751_PCIIO(port))
|
|
*((unsigned char*)PCI_IOMAP(port)) = value;
|
|
else
|
|
*(port2adr(port)) = value;
|
|
}
|
|
|
|
void sh7751se_outb_p(unsigned char value, unsigned long port)
|
|
{
|
|
if (PXSEG(port))
|
|
*(volatile unsigned char *)port = value;
|
|
else if (CHECK_SH7751_PCIIO(port))
|
|
*((unsigned char*)PCI_IOMAP(port)) = value;
|
|
else
|
|
*(port2adr(port)) = value;
|
|
delay();
|
|
}
|
|
|
|
void sh7751se_outw(unsigned short value, unsigned long port)
|
|
{
|
|
if (PXSEG(port))
|
|
*(volatile unsigned short *)port = value;
|
|
else if (CHECK_SH7751_PCIIO(port))
|
|
*((unsigned short *)PCI_IOMAP(port)) = value;
|
|
else if (port >= 0x2000)
|
|
*port2adr(port) = value;
|
|
else
|
|
maybebadio(outw, port);
|
|
}
|
|
|
|
void sh7751se_outl(unsigned int value, unsigned long port)
|
|
{
|
|
if (PXSEG(port))
|
|
*(volatile unsigned long *)port = value;
|
|
else if (CHECK_SH7751_PCIIO(port))
|
|
*((unsigned long*)PCI_IOMAP(port)) = value;
|
|
else
|
|
maybebadio(outl, port);
|
|
}
|
|
|
|
void sh7751se_insl(unsigned long port, void *addr, unsigned long count)
|
|
{
|
|
maybebadio(insl, port);
|
|
}
|
|
|
|
void sh7751se_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];
|
|
|
|
#if 0
|
|
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);
|
|
printk("sh_isa_mmap: start %x len %x offset %x (idx %x paddr %x)\n",
|
|
start, length, offset, idx, sh_isa_memmap[idx]);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
unsigned long
|
|
sh7751se_isa_port2addr(unsigned long offset)
|
|
{
|
|
int idx;
|
|
|
|
idx = (offset >> 12) & 0xff;
|
|
offset &= 0xfff;
|
|
return sh_isa_memmap[idx] + offset;
|
|
}
|