| 1 | /* $Id: idc_vdd.c,v 1.1 2000/04/23 14:55:16 ktk Exp $ */
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| 2 |
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| 3 | #define INCL_16
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| 4 | #define INCL_DOSINFOSEG
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| 5 | #include <os2.h>
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| 6 |
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| 7 | #include "idc_vdd.h"
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| 8 | #include <include.h>
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| 9 | #include <devhelp.h>
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| 10 |
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| 11 | ULONG pLincodec = 0;
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| 12 |
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| 13 | ADAPTERINFO __far * pfcodec_info;
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| 14 | ADAPTERINFO codec_info;
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| 15 | USHORT usInUseCount = 0;
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| 16 | USHORT usVDDHasHardware = FALSE;
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| 17 |
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| 18 | #pragma off (unreferenced);
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| 19 |
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| 20 |
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| 21 | // -------------------------- IDCVddOPENPDD -
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| 22 | // OS/2 MVDM kernel calls us to provide the IDC address
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| 23 | // of the Virtual Device driver.
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| 24 | // The VDD can also call (with address of NULL) to terminate
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| 25 | // future IDC between the drivers.
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| 26 | //
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| 27 | ULONG IDCVddOPENPDD (ULONG ul1, ULONG ul2)
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| 28 | {
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| 29 | // Nothing to do, we don't call the VDD
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| 30 | // ###should save the vdd entry point so we can call him later...
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| 31 | // we should inform him of shutdowns, apm events and when the hardware
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| 32 | // becomes free......
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| 33 | return (TRUE);
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| 34 | }
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| 35 | // -------------------- IDCVddQUERYPROTOCOL -
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| 36 | ULONG IDCVddQUERYPROTOCOL (ULONG ul1, ULONG ul2)
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| 37 | {
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| 38 | // if the VDD sends us Dead Beef
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| 39 | // We Return Dead Beef just like Hudson Foods !!
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| 40 | if (ul1 == IDC_PROTOCOL_LEVEL) {
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| 41 | return (IDC_PROTOCOL_LEVEL);
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| 42 | }
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| 43 | // Else Return junk
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| 44 | else {
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| 45 | return (-1);
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| 46 | } /* endif */
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| 47 | }
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| 48 |
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| 49 | // ---------------------- IDCVddASSIGNHANDLE -
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| 50 | ULONG IDCVddASSIGNHANDLE (ULONG ul1, ULONG ul2)
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| 51 | {
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| 52 | return (FALSE);
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| 53 | }
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| 54 | // ---------------------- IDCVddOPENDEVICE -
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| 55 | ULONG IDCVddOPENDEVICE (ULONG ul1, ULONG ul2)
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| 56 | {
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| 57 | if (usInUseCount == 0) {
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| 58 | usVDDHasHardware = TRUE;
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| 59 | return (TRUE);
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| 60 | }
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| 61 | else {
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| 62 | return (FALSE);
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| 63 | } /* endif */
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| 64 | }
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| 65 | // -------------------- IDCVddCLOSEDEVICE -
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| 66 | ULONG IDCVddCLOSEDEVICE (ULONG ul1, ULONG ul2)
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| 67 | {
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| 68 | usVDDHasHardware = FALSE;
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| 69 | return (TRUE);
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| 70 | }
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| 71 | // ------------------ IDCVddGETIOPORTINFO -
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| 72 | ULONG IDCVddGETIOPORTINFO (ULONG ul1, ULONG ul2)
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| 73 | {
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| 74 | return (pLincodec);
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| 75 | }
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| 76 | // --------------------- IDCVddTRUSTEDOPEN -
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| 77 | ULONG IDCVddTRUSTEDOPEN (ULONG ul1, ULONG ul2)
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| 78 | {
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| 79 | return (FALSE);
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| 80 | }
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| 81 |
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| 82 |
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| 83 | ULONG (*IDCVddFuncs[]) (ULONG ul1, ULONG ul2) =
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| 84 | {
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| 85 | IDCVddOPENPDD,
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| 86 | IDCVddQUERYPROTOCOL,
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| 87 | IDCVddASSIGNHANDLE,
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| 88 | IDCVddOPENDEVICE,
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| 89 | IDCVddCLOSEDEVICE,
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| 90 | IDCVddGETIOPORTINFO,
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| 91 | IDCVddTRUSTEDOPEN
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| 92 | };
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| 93 | USHORT MaxIDCVddFuncs = sizeof(IDCVddFuncs)/sizeof(USHORT);
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| 94 |
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| 95 |
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| 96 | // ---------------------- IDCEntry_VDD_c -
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| 97 | // Interface for other VDDs to call this device driver
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| 98 | //
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| 99 | ULONG pascal IDCEntry_VDD_c (ULONG ulFunc, ULONG ul1, ULONG ul2)
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| 100 | {
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| 101 | if (ulFunc > MaxIDCVddFuncs) {
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| 102 | return (FALSE);
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| 103 | }
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| 104 | else {
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| 105 | return (IDCVddFuncs [ulFunc](ul1,ul2));
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| 106 | }
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| 107 | }
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