| 1 | /* $Id: strategy.c,v 1.1 2000/04/23 14:55:25 ktk Exp $ */
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| 2 |
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| 3 | //******************************************************************************
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| 4 | // Strategy entry point
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| 5 | //
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| 6 | // Copyright 2000 Sander van Leeuwen (sandervl@xs4all.nl)
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| 7 | //
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| 8 | // This program is free software; you can redistribute it and/or
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| 9 | // modify it under the terms of the GNU General Public License as
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| 10 | // published by the Free Software Foundation; either version 2 of
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| 11 | // the License, or (at your option) any later version.
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| 12 | //
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| 13 | // This program is distributed in the hope that it will be useful,
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| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | // GNU General Public License for more details.
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| 17 | //
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| 18 | // You should have received a copy of the GNU General Public
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| 19 | // License along with this program; if not, write to the Free
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| 20 | // Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
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| 21 | // USA.
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| 22 | //
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| 23 | //******************************************************************************
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| 24 | extern "C" { // 16-bit header files are not C++ aware
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| 25 | #define INCL_NOPMAPI
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| 26 | #define INCL_DOSINFOSEG
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| 27 | #include <os2.h>
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| 28 | }
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| 29 |
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| 30 | #include <devhelp.h>
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| 31 | #include <devrp.h>
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| 32 | #include <devown.h>
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| 33 | #include "strategy.h"
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| 34 | #include <ossidc.h>
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| 35 |
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| 36 | extern ULONG StratIOCtl(RP __far *_rp);
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| 37 | extern ULONG StratClose(RP __far *_rp);
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| 38 | extern ULONG DiscardableInit(RPInit __far*_rp);
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| 39 |
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| 40 |
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| 41 | // SvL: Needed in StratOpen
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| 42 | ULONG deviceOwner = DEV_NO_OWNER;
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| 43 | ULONG numOS2Opens = 0;
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| 44 | // SvL: End
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| 45 |
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| 46 | ULONG StratOpen(RP __far*)
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| 47 | {
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| 48 | if (numOS2Opens == 0) {
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| 49 | deviceOwner = DEV_PDD_OWNER;
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| 50 | }
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| 51 | numOS2Opens++;
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| 52 | return RPDONE;
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| 53 | }
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| 54 |
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| 55 | // External initialization entry-point
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| 56 | ULONG StratInit(RP __far* _rp)
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| 57 | {
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| 58 | RPInit __far* rp = (RPInit __far*)_rp;
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| 59 | return DiscardableInit(rp);
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| 60 | }
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| 61 |
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| 62 |
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| 63 | // External initialization entry-point
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| 64 | ULONG StratInitComplete(RP __far* )
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| 65 | {
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| 66 | return(RPDONE);
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| 67 | }
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| 68 |
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| 69 | ULONG StratShutdown(RP __far *_rp)
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| 70 | {
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| 71 | RPShutdown __far *rp = (RPShutdown __far *)_rp;
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| 72 |
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| 73 | if(rp->Function == 1) {//end of shutdown
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| 74 | OSS32_RemoveDriver();
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| 75 | }
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| 76 | return(RPDONE);
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| 77 | }
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| 78 |
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| 79 | // Handle unsupported requests
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| 80 | static ULONG StratError(RP __far*)
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| 81 | {
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| 82 | return RPERR_COMMAND | RPDONE;
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| 83 | }
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| 84 |
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| 85 |
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| 86 | // Strategy dispatch table
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| 87 | //
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| 88 | // This table is used by the strategy routine to dispatch strategy requests
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| 89 |
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| 90 | typedef ULONG (*RPHandler)(RP __far* rp);
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| 91 | RPHandler StratDispatch[] =
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| 92 | {
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| 93 | StratInit, // 00 (BC): Initialization
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| 94 | StratError, // 01 (B ): Media check
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| 95 | StratError, // 02 (B ): Build BIOS parameter block
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| 96 | StratError, // 03 ( ): Unused
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| 97 | StratError, // 04 (BC): Read
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| 98 | StratError, // 05 ( C): Nondestructive read with no wait
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| 99 | StratError, // 06 ( C): Input status
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| 100 | StratError, // 07 ( C): Input flush
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| 101 | StratError, // 08 (BC): Write
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| 102 | StratError, // 09 (BC): Write verify
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| 103 | StratError, // 0A ( C): Output status
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| 104 | StratError, // 0B ( C): Output flush
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| 105 | StratError, // 0C ( ): Unused
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| 106 | StratOpen, // 0D (BC): Open
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| 107 | StratClose, // 0E (BC): Close
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| 108 | StratError, // 0F (B ): Removable media check
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| 109 | StratIOCtl, // 10 (BC): IO Control
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| 110 | StratError, // 11 (B ): Reset media
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| 111 | StratError, // 12 (B ): Get logical unit
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| 112 | StratError, // 13 (B ): Set logical unit
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| 113 | StratError, // 14 ( C): Deinstall character device driver
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| 114 | StratError, // 15 ( ): Unused
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| 115 | StratError, // 16 (B ): Count partitionable fixed disks
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| 116 | StratError, // 17 (B ): Get logical unit mapping of fixed disk
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| 117 | StratError, // 18 ( ): Unused
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| 118 | StratError, // 19 ( ): Unused
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| 119 | StratError, // 1A ( ): Unused
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| 120 | StratError, // 1B ( ): Unused
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| 121 | StratShutdown, // 1C (BC): Notify start or end of system shutdown
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| 122 | StratError, // 1D (B ): Get driver capabilities
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| 123 | StratError, // 1E ( ): Unused
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| 124 | StratInitComplete // 1F (BC): Notify end of initialization
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| 125 | };
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| 126 |
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| 127 |
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| 128 |
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| 129 | // Strategy entry point
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| 130 | //
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| 131 | // The strategy entry point must be declared according to the STRATEGY
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| 132 | // calling convention, which fetches arguments from the correct registers.
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| 133 |
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| 134 | ULONG Strategy(RP __far* rp);
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| 135 | #pragma aux (STRATEGY) Strategy "SBLIVE_STRATEGY";
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| 136 | ULONG Strategy(RP __far* rp)
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| 137 | {
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| 138 | if (rp->Command < sizeof(StratDispatch)/sizeof(StratDispatch[0]))
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| 139 | return(StratDispatch[rp->Command](rp));
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| 140 | else return(RPERR_COMMAND | RPDONE);
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| 141 | }
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| 142 |
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| 143 |
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| 144 |
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