NuBusFPGA/nubus-to-ztex-gateware/DeclROM/NuBusFPGADrvr_OpenClose.c
2022-04-17 11:25:48 +02:00

77 lines
2.2 KiB
C

#include "NuBusFPGADrvr.h"
OSErr cNuBusFPGAOpen(IOParamPtr pb, /* DCtlPtr */ AuxDCEPtr dce)
{
OSErr ret = noErr;
/* write_reg(dce, GOBOFB_DEBUG, 0xBEEF0000); */
/* write_reg(dce, GOBOFB_DEBUG, (unsigned long)dce->dCtlDevBase); */
if (dce->dCtlStorage == nil)
{
int i;
/* set up flags in the device control entry */
/* dce->dCtlFlags |= (dCtlEnableMask | dStatEnableMask | dWritEnableMask |
dReadEnableMask | dNeedLockMask | dRAMBasedMask ); */
/* initialize dCtlStorage */
ReserveMemSys(sizeof(NuBusFPGADriverGlobals));
dce->dCtlStorage = NewHandleSysClear(sizeof(NuBusFPGADriverGlobals));
if (dce->dCtlStorage == nil)
return(openErr);
HLock(dce->dCtlStorage);
NuBusFPGADriverGlobalsHdl dStoreHdl = (NuBusFPGADriverGlobalsHdl)dce->dCtlStorage;
/* (*dStore)->dce = dce; */
/* for (i = 0 ; i < 256 ; i++) { */
/* (*dStoreHdl)->shadowClut[i*3+0] = i; */
/* (*dStoreHdl)->shadowClut[i*3+1] = i; */
/* (*dStoreHdl)->shadowClut[i*3+2] = i; */
/* } */
(*dStoreHdl)->gray = 0;
(*dStoreHdl)->irqen = 0;
SlotIntQElement *siqel = (SlotIntQElement *)NewPtrSysClear(sizeof(SlotIntQElement));
if (siqel == NULL) {
return openErr;
}
siqel->sqType = sIQType;
siqel->sqPrio = 8;
//siqel->sqAddr = interruptRoutine;
/* not sure how to get the proper result in C... */
SlotIntServiceProcPtr sqAddr;
asm("lea %%pc@(interruptRoutine),%0\n" : "=a"(sqAddr));
siqel->sqAddr = sqAddr;
siqel->sqParm = (long)dce->dCtlDevBase;
(*dStoreHdl)->siqel = siqel;
linearGamma(*dStoreHdl);
write_reg(dce, GOBOFB_MODE, GOBOFB_MODE_8BIT);
write_reg(dce, GOBOFB_VIDEOCTRL, 1);
ret = changeIRQ(dce, 1, openErr);
}
return noErr;
}
OSErr cNuBusFPGAClose(IOParamPtr pb, /* DCtlPtr */ AuxDCEPtr dce)
{
OSErr ret = noErr;
/* write_reg(dce, GOBOFB_DEBUG, 0xBEEF0003); */
/* write_reg(dce, GOBOFB_DEBUG, 0x0000DEAD); */
asm(".word 0xfe16\n");
if (dce->dCtlStorage != nil)
{
ret = changeIRQ(dce, 0, openErr);
write_reg(dce, GOBOFB_VIDEOCTRL, 0);
DisposePtr((Ptr)(*(NuBusFPGADriverGlobalsHdl)dce->dCtlStorage)->siqel);
DisposeHandle(dce->dCtlStorage);
dce->dCtlStorage = nil;
}
return ret;
}