193 lines
4.2 KiB
C
193 lines
4.2 KiB
C
/*
|
|
* NS87560.C - NS NS87560 PCI chipset routines.
|
|
*
|
|
* Notes:
|
|
* Algorithms from National Semiconductor NS87560 Data Sheet
|
|
*
|
|
*/
|
|
|
|
#include "local.h"
|
|
|
|
/****************************************************************************
|
|
*
|
|
* NS87560SetIRQ - Set a NS87560 PCI link to a specific IRQ
|
|
*
|
|
* Exported.
|
|
*
|
|
* ENTRY: bIRQNumber is the new IRQ to be used.
|
|
*
|
|
* bLink is the Link to be set.
|
|
*
|
|
* EXIT: Standard PCIMP return value.
|
|
*
|
|
***************************************************************************/
|
|
PCIMPRET CDECL
|
|
NS87560SetIRQ(UCHAR bIRQNumber, UCHAR bLink)
|
|
{
|
|
UCHAR bOffset, bOldValue;
|
|
//
|
|
// Validate link number.
|
|
//
|
|
if (bLink > 4) {
|
|
|
|
return(PCIMP_INVALID_LINK);
|
|
}
|
|
//
|
|
// Zero based.
|
|
//
|
|
bLink--;
|
|
|
|
//
|
|
// Set various values.
|
|
//
|
|
bOffset=(bLink/2)+0x6C;
|
|
|
|
//
|
|
// Read the old NS87560 IRQ register.
|
|
//
|
|
bOldValue=ReadConfigUchar(bBusPIC, bDevFuncPIC, bOffset);
|
|
|
|
if (bLink&1) {
|
|
bOldValue&=0x0f;
|
|
bOldValue|=(bIRQNumber<<4);
|
|
}
|
|
else {
|
|
bOldValue&=0xf0;
|
|
bOldValue|=bIRQNumber;
|
|
}
|
|
|
|
//
|
|
// Set the NS87560 IRQ register.
|
|
//
|
|
WriteConfigUchar(bBusPIC, bDevFuncPIC, bOffset, bOldValue);
|
|
|
|
return(PCIMP_SUCCESS);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* NS87560GetIRQ - Get the IRQ of a NS87560 PCI link
|
|
*
|
|
* Exported.
|
|
*
|
|
* ENTRY: pbIRQNumber is the buffer to fill.
|
|
*
|
|
* bLink is the Link to be read.
|
|
*
|
|
* EXIT: Standard PCIMP return value.
|
|
*
|
|
***************************************************************************/
|
|
PCIMPRET CDECL
|
|
NS87560GetIRQ(PUCHAR pbIRQNumber, UCHAR bLink)
|
|
{
|
|
UCHAR bOffset, bOldValue;
|
|
//
|
|
// Validate link number.
|
|
//
|
|
if (bLink > 4) {
|
|
|
|
return(PCIMP_INVALID_LINK);
|
|
}
|
|
|
|
//
|
|
// Zero based.
|
|
//
|
|
bLink--;
|
|
|
|
//
|
|
// Set various values.
|
|
//
|
|
bOffset=(bLink/2)+0x6C;
|
|
|
|
//
|
|
// Read the old NS87560 IRQ register.
|
|
//
|
|
bOldValue=ReadConfigUchar(bBusPIC, bDevFuncPIC, bOffset);
|
|
|
|
if (bLink&1)
|
|
bOldValue>>=4;
|
|
|
|
*pbIRQNumber=bOldValue&0x0f;
|
|
|
|
return(PCIMP_SUCCESS);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* NS87560SetTrigger - Set the IRQ triggering values for the NS87560
|
|
*
|
|
* Exported.
|
|
*
|
|
* ENTRY: ulTrigger has bits set for Level triggered IRQs.
|
|
*
|
|
* EXIT: Standard PCIMP return value.
|
|
*
|
|
***************************************************************************/
|
|
PCIMPRET CDECL
|
|
NS87560SetTrigger(ULONG ulTrigger)
|
|
{
|
|
WriteConfigUchar(bBusPIC, bDevFuncPIC, 0x67, (UCHAR)ulTrigger);
|
|
WriteConfigUchar(bBusPIC, bDevFuncPIC, 0x68, (UCHAR)(ulTrigger >> 8));
|
|
|
|
return (PCIMP_SUCCESS);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* NS87560GetTrigger - Get the IRQ triggering values for the NS87560
|
|
*
|
|
* Exported.
|
|
*
|
|
* ENTRY: pulTrigger will have bits set for Level triggered IRQs.
|
|
*
|
|
* EXIT: Standard PCIMP return value.
|
|
*
|
|
***************************************************************************/
|
|
PCIMPRET CDECL
|
|
NS87560GetTrigger(PULONG pulTrigger)
|
|
{
|
|
//
|
|
// Assume all edge.
|
|
//
|
|
*pulTrigger = 0;
|
|
|
|
*pulTrigger |= ReadConfigUchar(bBusPIC, bDevFuncPIC, 0x67);
|
|
*pulTrigger |= (ReadConfigUchar(bBusPIC, bDevFuncPIC, 0x68) << 8);
|
|
|
|
return (PCIMP_SUCCESS);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* NS87560ValidateTable - Validate an IRQ table
|
|
*
|
|
* Exported.
|
|
*
|
|
* ENTRY: piihIRQInfoHeader points to an IRQInfoHeader followed
|
|
* by an IRQ Routing Table.
|
|
*
|
|
* ulFlags are PCIMP_VALIDATE flags.
|
|
*
|
|
* EXIT: Standard PCIMP return value.
|
|
*
|
|
***************************************************************************/
|
|
#ifdef ALLOC_PRAGMA
|
|
PCIMPRET CDECL
|
|
NS87560ValidateTable(PIRQINFOHEADER piihIRQInfoHeader, ULONG ulFlags);
|
|
#pragma alloc_text(PAGE, NS87560ValidateTable)
|
|
#endif //ALLOC_PRAGMA
|
|
|
|
PCIMPRET CDECL
|
|
NS87560ValidateTable(PIRQINFOHEADER piihIRQInfoHeader, ULONG ulFlags)
|
|
{
|
|
PAGED_CODE();
|
|
|
|
//
|
|
// If any link is above 4, it is an error.
|
|
//
|
|
if (GetMaxLink(piihIRQInfoHeader)>4)
|
|
return(PCIMP_FAILURE);
|
|
|
|
return(PCIMP_SUCCESS);
|
|
}
|