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418 lines
12 KiB
C
418 lines
12 KiB
C
/*********************************************************************************
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File: HALc96.c
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Contains: routines that implement the HAL for 53c96 HBAs (Quadras)
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Notes:
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This HAL follows the rules for SCSI HALs. That means it:
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• has 1 Action entry point
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• has 1 Bus Inquiry entry point
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It also has its own rules:
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• has 1 software and 1 hardware init entry point
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• these entry points expect a ptr to a CONSTANTs structure that contains addresses
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and characteristics of the HBA that it is responsible for. This structure is
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called HBADesc_c96.
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• the 53c96 registers are offset $10 from one another (i.e. reg2 = $20+base)
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Entry points:
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Written by: Paul Wolf
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Copyright: © 1992-1994 by Apple Computer, Inc., all rights reserved.
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Change History (most recent first):
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<SM24> 2/2/94 DCB Adding another bit to SCSIWeirdStuff - this time to indicate a
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need for scsiHandshaking.
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<SM23> 2/1/94 DCB Added scsiBusErrorsUnsafe to BusInquiry on emulated pseudo-DMA
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machines.
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<SM22> 1/28/94 chp Make TNT unconditionally oldCallCapable.
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<SM21> 11/22/93 pdw Rolling in from <MCxx>.
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<SM20> 11/22/93 pdw Added TNT debug flags around setting of oldCallCapable flag.
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<SM19> 11/19/93 chp Nothing to worry about. Just removed a commented-out line of TNT
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code.
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<SMG3> 9/29/93 chp Clean up header. Remove unnecessary includes. Add a switch case
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to initialize the Grand Central HBA software.
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<SMG2> 9/22/93 chp Classify the interrupt handler for Grand Central.
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<SM17> 10/14/93 pdw Added support for Synchronous data transfers, rewrote State
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Machine, message handling etc.
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<SM16> 9/12/93 pdw Add ReInit (reregister) stuff.
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<SM15> 9/9/93 pdw
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<SM14> 7/17/93 pdw Lots of little things.
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<SM13> 7/8/93 pdw Got rid of an unnecessary local variable somewhere.
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<SM12> 6/29/93 pdw Massive checkins: Change asynchronicity mechanism to CallMachine
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stack switching mechanism. Adding support for Cold Fusion.
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Rearranging HW/SW Init code. Some code optimizations.
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<SM11> 5/25/93 DCB Rollin from Ludwig. (The next item below)
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<LW9> 5/21/93 PW Fixed BusInquiry (we weren't filling everything in)
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<SM10> 5/5/93 PW Converted names to meanies-friendly names.
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<LW8> 4/30/93 DCB Adding entry point for BusInquiry.
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<LW6> 3/26/93 PW Changed name of busOldAPICapable to scsiBusOldCallCapable. Wow!
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<LW5> 3/1/93 DCB Added slot and srsrc fields to bus inquiry
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<LW4> 2/17/93 PW Began to add dual-interrupt support for Quadras.
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<SM7> 1/31/93 PW Update from the latest of Ludwig. Also changes required for PDM
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(will update Ludwig with these as needed myself).
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<LW3> 1/27/93 PW Changing busNoExtern to scsiBusInternalExternal.
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<LW2> 1/27/93 PW Changed some fields in BusInquiry including scsiIOFlagsSupported
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and scsiFlagsSupported.
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<SM6> 12/5/92 PW Changed some field names.
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<SM5> 11/20/92 DCB Minor changes to the data returned in BusInquiry
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<SM4> 10/30/92 DCB Changed to reflect new acam.h
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<SM3> 10/8/92 PW Lots of trivial name changes.
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<SM2> 7/28/92 PW Resolved differences in sources.
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<SM1> 7/26/92 PW Initial check-in.
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**********************************************************************************/
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#include <Errors.h>
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#include "SCSIGlue.h"
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#include "XPTpriv.h"
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#include "SIMCorePriv.h"
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#include "HALc96.h"
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#define PRIVATE_STACK_SIZE 16*1024
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extern long HAL_NoISR(HALc96Globals *HALg);
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void HALInitCommon( HBADesc_53c9x *hwDescPtr, HALinitInfo * HALinfoPtr);
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/*********************************************************************************
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Init53c9xHW - Initialize HBA
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Initialize 53c96
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PSC?
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VIA int?
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NOTE: For now (3/2/92) I will assume that HW was init'd by InitSCSIMgrHW
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*********************************************************************************/
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#if 0
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long
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Init53c9xHW(HBADesc_53c9x *hwDesc)
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{
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ClearSCSIIRQ(hwDesc);
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EnableSCSIInt();
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return (0);
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}
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#endif
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/*********************************************************************************
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Init53c9xSW - Initialize HAL for 53c96
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Register HBA with SIMCore (which will then register with XPT)
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*********************************************************************************/
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void * // HALg
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Init53c9xSW(HBADesc_53c9x *hwDescPtr)
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{
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HALinitInfo HALinfo;
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HALc96Globals * HALg;
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// Put our values into registration parameter block
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HALInitCommon( hwDescPtr, &HALinfo);
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HALinfo.supported_scFlags = SUPPORTED_scFlags;
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HALinfo.supported_scIOFlags = SUPPORTED_scIOFlags;
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HALinfo.supported_scDataTypes = SUPPORTED_scDataTypes;
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// Make call then get HALg from pb
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if (SIMRegisterHAL( &HALinfo))
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return (0);
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HALg = (HALc96Globals *)HALinfo.HALstaticPtr;
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return (HALg);
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}
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/*********************************************************************************
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ReInitHAL - Initialize HAL for 53c96
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Reregister HBA with SIMCore (which will then reregister with XPT)
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*********************************************************************************/
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void * // HALg
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ReInitHAL(HBADesc_53c9x *hwDescPtr, ushort busID)
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{
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HALinitInfo HALinfo;
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HALc96Globals * HALg;
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// Put our values into registration parameter block
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HALInitCommon( hwDescPtr, &HALinfo);
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HALinfo.busID = busID;
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HALinfo.supported_scFlags = SUPPORTED_scFlags;
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HALinfo.supported_scIOFlags = SUPPORTED_scIOFlags;
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HALinfo.supported_scDataTypes = SUPPORTED_scDataTypes;
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// Make call then get HALg from pb
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if (SIMReregisterHAL( &HALinfo))
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return (0);
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HALg = (HALc96Globals *)HALinfo.HALstaticPtr;
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return (HALg);
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}
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/*********************************************************************************
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HALInitCommon
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ReRegister HBA with SIMCore (which will then reregister with XPT)
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*********************************************************************************/
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void
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HALInitCommon( HBADesc_53c9x *hwDescPtr, HALinitInfo * HALinfoPtr)
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{
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// Set up HALinfo for call to SIMRegisterHAL
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// -> num bytes HAL needs for static vars
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HALinfoPtr->staticSize = SizeOfGlobals();
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HALinfoPtr->HALstaticPtr = 0;
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HALinfoPtr->HALinit = HALinit; // -> ptr to HAL init routine
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HALinfoPtr->HALaction = HALaction; // -> ptr to HAL action routine
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HALinfoPtr->HALBusInquiry = GetHalInfo; // -> ptr to BusInquiry routine
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HALinfoPtr->HALIntPoll = HALIntPoll; // -> ptr to HAL interrupt polling routine
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HALinfoPtr->HALResetBus = HALResetBus; // -> ptr to HAL ResetBus routine
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HALinfoPtr->HALAssertATN = HALAssertATN; // -> ptr to HAL AssertATN routine
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HALinfoPtr->HALTeardownIO = HALTeardownIO; // -> ptr to HAL TeardownIO routine
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HALinfoPtr->HALSyncConfig = HALSyncConfig; // -> ptr to HAL SyncConfig routine
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// -> ptr to HAL interrupt service routine
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switch (hwDescPtr->intTypeSCSI) {
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case SHARED_VIA:
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HALinfoPtr->HAL_ISR = HAL_DualISR;
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break;
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case INDEPENDENT_VIA:
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HALinfoPtr->HAL_ISR = HAL_SingleISR;
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break;
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case SECOND_SHARED_VIA:
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HALinfoPtr->HAL_ISR = HAL_NoISR;
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break;
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case GRAND_CENTRAL:
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HALinfoPtr->HAL_ISR = HAL_SingleISR;
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break;
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}
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// -> true if this HAL can handle old-API calls
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HALinfoPtr->oldCallCapable = true;
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// Set up synchronous parameters
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HALinfoPtr->HBAisSync = true;
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HALinfoPtr->HBAisFast = hwDescPtr->HBAisFast;
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if (hwDescPtr->usesThreshold8)
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HALinfoPtr->syncRAoffset = 7;
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else
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HALinfoPtr->syncRAoffset = 15;
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if (hwDescPtr->HBAisFast)
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HALinfoPtr->minPeriodFactor = 25;
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else
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HALinfoPtr->minPeriodFactor = 50;
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// -- put hwDescPtr in HALinfo so that HALinit can get at it
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HALinfoPtr->hwDescPtr = hwDescPtr;
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}
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/*********************************************************************************
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HALinit -
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*********************************************************************************/
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long
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HALinit( HALinitInfo * HALinfoPtr)
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{
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HALc96Globals * HALg;
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HBADesc_53c9x * hwDescPtr;
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Ptr privateStack;
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OSErr err;
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// Get results out of HALinfo and put them in HALglobals
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// get HALg ptr from static ptr allocated by SIM
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HALg = (HALc96Globals *)(HALinfoPtr->HALstaticPtr);
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hwDescPtr = HALinfoPtr->hwDescPtr;
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// store entire HWDesc into our globals
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HALg->hwDesc = *hwDescPtr;
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// If DMA is used, call the Init DMA routine
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switch (hwDescPtr->dmaType)
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{
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case dmaTypePSC:
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if (err = InitSW_PSC( HALg))
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return (err);
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break;
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case dmaTypeAMIC:
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if (err = InitSW_AMIC( HALg))
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return (err);
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break;
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case dmaTypeGC:
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if (err = InitSW_GC( HALg))
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return (err);
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break;
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case dmaTypeNone:
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break;
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}
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HALg->supported_scFlags = HALinfoPtr->supported_scFlags;
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HALg->supported_scIOFlags = HALinfoPtr->supported_scIOFlags;
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HALg->supported_scDataTypes = HALinfoPtr->supported_scDataTypes;
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// store busID as returned from register
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HALg->busID = HALinfoPtr->busID;
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// store SIMstaticPtr for use in callbacks to SIMCore
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HALg->SIMstaticPtr = HALinfoPtr->SIMstaticPtr;
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HALg->ReconnectISRptr = HALinfoPtr->ReconnectISR;
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HALg->XPT_ISRptr = HALinfoPtr->XPT_ISR;
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// Allocate our private stack
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privateStack = NewPtrSysClear( PRIVATE_STACK_SIZE);
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if (! privateStack )
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return (memFullErr);
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HALg->privStackTop = privateStack+PRIVATE_STACK_SIZE;
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*(--(long *)(HALg->privStackTop)) = 0xDEADFACE;
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// initialize Asm stuff
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Initc96Asm( HALg);
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return (0);
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}
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/*********************************************************************************
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HAL_NoISR
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*********************************************************************************/
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long
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HAL_NoISR( HALc96Globals *HALg)
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{
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#pragma unused(HALg)
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return (0);
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}
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/*********************************************************************************
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GetHalInfo - fill in info parameter block
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*********************************************************************************/
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long
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GetHalInfo( HALc96Globals * HALg, SCSIBusInquiryPB * infoPB )
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{
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ulong HalFeatures;
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HalFeatures = scsiBusOldCallCapable;
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// if we've got 2 buses and this is bus 0 then it's an Internal only bus.
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if (TestFor_SCSI96_2Exists() ) {
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if (HALg->busID == 0)
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HalFeatures |= scsiBusInternal;
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else
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HalFeatures |= scsiBusInternalExternal;
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}
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else
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HalFeatures = scsiBusInternalExternal;
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if( HALg->hwDesc.HBAhasDMA )
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HalFeatures |= scsiBusDMAavailable;
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if( HALg->hwDesc.HBAisFast && (HALg->supported_scFlags & scsiInitiateSyncData) )
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HalFeatures |= scsiBusFastSCSI;
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if( HALg->hwDesc.HBAisDiff )
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HalFeatures |= scsiBusDifferential;
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infoPB->scsiFeatureFlags = HalFeatures;
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infoPB->scsiFlagsSupported = HALg->supported_scFlags;
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infoPB->scsiIOFlagsSupported = HALg->supported_scIOFlags;
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infoPB->scsiWeirdStuff = scsiTargetDrivenSDTRSafe;
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if ( HALg->hwDesc.usesThreshold8) {
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infoPB->scsiWeirdStuff |= scsiOddDisconnectUnsafeWrite1;
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}
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if( HALg->hwDesc.using601Emulator == true && HALg->hwDesc.HBAhasDMA == false ) {
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infoPB->scsiWeirdStuff |= scsiBusErrorsUnsafe;
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}
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if( HALg->hwDesc.HBAhasDMA == false ) {
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infoPB->scsiWeirdStuff |= scsiRequiresHandshake;
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}
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infoPB->scsiMaxTransferType = kMaxTransferType;
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infoPB->scsiDataTypes = HALg->supported_scDataTypes;
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infoPB->scsiVersionNumber = scsiVERSION;
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infoPB->scsiHBAInquiry = scsiBusSoftReset + 0;
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infoPB->scsiTargetModeFlags = 0;
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infoPB->scsiScanFlags = 0; // !!! ?
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infoPB->scsiHBAslotNumber = 0; // Motherboard Bus
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infoPB->scsiSIMsRsrcID = infoPB->scsiDevice.bus; // We don't have an srsrc so we use bus ID
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infoPB->scsiEngineCount = 0;
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infoPB->scsiAsyncFlags = 0;
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infoPB->scsiSIMPrivatesPtr = 0;
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infoPB->scsiSIMPrivatesSize = 0;
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infoPB->scsiMaxTarget = 7;
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infoPB->scsiMaxLUN = 7;
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infoPB->scsiInitiatorID = GetInitiatorID( (HBADesc_53c9x *)HALg);
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// If anybody cares about this version stuff then we should put the
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// version number in a public header somewhere. Otherwise...
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infoPB->scsiSIMversion[0] = 0;
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infoPB->scsiSIMversion[1] = 1; // version = 1.00
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infoPB->scsiSIMversion[2] = 0;
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infoPB->scsiSIMversion[3] = 0;
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infoPB->scsiHBAversion[0] = 0;
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infoPB->scsiHBAversion[1] = 1; // version = 1.00
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infoPB->scsiHBAversion[2] = 0;
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infoPB->scsiHBAversion[3] = 0;
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BlockMove("Apple Computer \0",infoPB->scsiSIMVendor,16);
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BlockMove("Apple Computer \0",infoPB->scsiHBAVendor,16);
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BlockMove("NCR 53c96 \0",infoPB->scsiControllerFamily,16);
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BlockMove("Unknown... \0",infoPB->scsiControllerType,16);
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infoPB->scsiAdditionalLength = 0;
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return(0);
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}
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