138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
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//---------------------------------------------------------------------------
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/*++
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Copyright (c) 1993 Compaq Computer Corporation
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Module Name:
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ctlrasic.c
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Abstract:
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This module contains the code for identification of Compaq
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Display Controller ASICS.
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Original QVision ASIC - Feb. '92
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--------------------------------
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QVision 1024 /E - 1M configuration
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QVision 1024 /I - 1M configuration
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Deskpro /i with system board QVision - 512k or 1M configuration
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Enhanced QVision ASIC - May '93
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-------------------------------
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QVision 1024 /E - 1M or 2M configuration
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QVision 1024 /I - 1M or 2M configuration
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QVision 1280 /E - 2M configuration
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QVision 1280 /I - 2M configuration
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Environment:
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kernel mode only
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Notes:
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Revision History:
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$0006
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miked: 02/17/1994
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. took out conditional debug code to satisfy MSBHPD
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$0004
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miked: 1/26/1994
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. Added debug print code without all the other DBG overhead
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12/1/93 Mike Duke Original module started as start for NT version of QRY
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library.
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--*/
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//---------------------------------------------------------------------------
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#include "dderror.h"
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#include "devioctl.h"
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#include "miniport.h"
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#include "ntddvdeo.h"
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#include "video.h"
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#include "qvision.h"
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#include "qry_nt.h"
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ULONG
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QRY_ControllerASICID( PUCHAR IOAddress )
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/*++
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Function: QRY_ControllerASICID
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This function returns the ASIC id of Compaq Video controllers.
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Return value:
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The return value is a ULONG with bytes defined as follows:
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3 2 1 0 (byte positions)
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ULONG ---> XX FF FF FF
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-- -- -- --
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| | | |____ASIC ID
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| | |_______Extended ID
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| |__________Second Extended ID
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|_____________Not used (will be zero)
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--*/
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//---------------------------------------------------------------------------
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{
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ULONG ulReturn = 0L;
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UCHAR ucTemp = 0 ;
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// unlock QVision registers
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//
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VideoPortWritePortUchar((PUCHAR)(IOAddress + GRAPH_ADDRESS_PORT),
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0x0f);
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ucTemp = VideoPortReadPortUchar((IOAddress + \
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GRAPH_DATA_PORT)) & 0xf0;
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VideoPortWritePortUchar((PUCHAR)(IOAddress + GRAPH_DATA_PORT),
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(UCHAR)(0x05 | ucTemp));
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VideoPortWritePortUchar((PUCHAR)(IOAddress + GRAPH_ADDRESS_PORT),
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0x10);
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ucTemp = VideoPortReadPortUchar((PUCHAR)(IOAddress + GRAPH_DATA_PORT));
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VideoPortWritePortUchar((PUCHAR)(IOAddress + GRAPH_DATA_PORT),
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(UCHAR)(0x28 | ucTemp));
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//
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// get asic id
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//
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VideoPortWritePortUchar((PUCHAR)(IOAddress + GRAPH_ADDRESS_PORT), 0x0c);
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// read in asic id
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//
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ucTemp = VideoPortReadPortUchar(IOAddress + GRAPH_DATA_PORT) ;
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ulReturn = (ULONG)ucTemp; // save asic id
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//
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// is extended id info available ?
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//
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if (ucTemp & EXTENDED_ID_BIT) {
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VideoPortWritePortUchar((PUCHAR)(IOAddress + GRAPH_ADDRESS_PORT), 0x0d);
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//
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// read in extended id
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//
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ucTemp = VideoPortReadPortUchar(IOAddress + GRAPH_DATA_PORT) ;
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ulReturn |= ((ULONG)(ucTemp)) << 8 ;
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//
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// is second extended id info available ?
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//
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if (ucTemp & EXTENDED_ID2_BIT) {
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VideoPortWritePortUchar((PUCHAR)(IOAddress + GRAPH_ADDRESS_PORT), 0x0e);
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//
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// read in second extended id
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//
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ucTemp = VideoPortReadPortUchar(IOAddress + GRAPH_DATA_PORT) ;
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ulReturn |= ((ULONG)(ucTemp)) << 16 ;
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}
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}
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return (ulReturn);
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}
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