| 1 | /* $Id: strategy.c,v 1.1.1.1 2003/07/02 13:56:56 eleph Exp $ */
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| 2 | /*
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| 3 | * Strategy entry point
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| 4 | *
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| 5 | * (C) 2000-2002 InnoTek Systemberatung GmbH
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| 6 | * (C) 2000-2001 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 |
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| 25 | #define INCL_NOPMAPI
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| 26 | #define INCL_DOSINFOSEG // Need Global info seg in rm.cpp algorithms
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| 27 | #include <os2.h>
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| 28 |
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| 29 | #include <devhelp.h>
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| 30 | #include <devrp.h>
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| 31 | #include <devown.h>
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| 32 | #include "strategy.h"
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| 33 | #include <ossidc32.h>
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| 34 | #include <dbgos2.h>
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| 35 |
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| 36 | ULONG StratRead(RP __far *_rp);
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| 37 | ULONG StratIOCtl(RP __far *_rp);
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| 38 | ULONG StratClose(RP __far *_rp);
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| 39 |
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| 40 | ULONG DiscardableInit(RPInit __far*);
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| 41 |
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| 42 | ULONG deviceOwner = DEV_NO_OWNER;
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| 43 | ULONG numOS2Opens = 0;
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| 44 |
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| 45 | //******************************************************************************
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| 46 | //******************************************************************************
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| 47 | ULONG StratOpen(RP __far*)
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| 48 | {
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| 49 | if (numOS2Opens == 0) {
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| 50 | deviceOwner = DEV_PDD_OWNER;
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| 51 | }
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| 52 | numOS2Opens++;
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| 53 | return RPDONE;
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| 54 | }
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| 55 | //******************************************************************************
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| 56 | //******************************************************************************
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| 57 | #pragma off (unreferenced)
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| 58 | static ULONG StratWrite(RP __far* _rp)
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| 59 | #pragma on (unreferenced)
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| 60 | {
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| 61 | return RPDONE | RPERR;
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| 62 | }
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| 63 | //******************************************************************************
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| 64 | // External initialization entry-point
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| 65 | //******************************************************************************
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| 66 | ULONG StratInit(RP __far* _rp)
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| 67 | {
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| 68 | ULONG rc;
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| 69 |
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| 70 | RPInit __far* rp = (RPInit __far*)_rp;
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| 71 | rc = DiscardableInit(rp);
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| 72 | #ifdef DEBUG
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| 73 | dprintf(("StratInit. cp1.rc %d", rc));
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| 74 | #endif
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| 75 | return rc;
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| 76 | }
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| 77 | //******************************************************************************
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| 78 | // External initialization complete entry-point
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| 79 | //******************************************************************************
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| 80 | #pragma off (unreferenced)
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| 81 | ULONG StratInitComplete(RP __far* _rp)
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| 82 | #pragma on (unreferenced)
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| 83 | {
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| 84 | #ifdef DEBUG
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| 85 | dprintf(("StratInitComplete"));
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| 86 | #endif
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| 87 | return(RPDONE);
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| 88 | }
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| 89 | //******************************************************************************
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| 90 | //******************************************************************************
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| 91 | #pragma off (unreferenced)
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| 92 | ULONG StratShutdown(RP __far *_rp)
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| 93 | #pragma on (unreferenced)
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| 94 | {
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| 95 | RPShutdown __far *rp = (RPShutdown __far *)_rp;
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| 96 |
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| 97 | #ifdef DEBUG
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| 98 | dprintf(("StratShutdown %d", rp->Function));
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| 99 | #endif
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| 100 | if(rp->Function == 1) {//end of shutdown
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| 101 | OSS32_Shutdown();
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| 102 | }
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| 103 | return(RPDONE);
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| 104 | }
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| 105 | //******************************************************************************
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| 106 | //******************************************************************************
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| 107 | // Handle unsupported requests
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| 108 | static ULONG StratError(RP __far*)
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| 109 | {
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| 110 | return RPERR_COMMAND | RPDONE;
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| 111 | }
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| 112 | //******************************************************************************
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| 113 | // Strategy dispatch table
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| 114 | //
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| 115 | // This table is used by the strategy routine to dispatch strategy requests
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| 116 | //******************************************************************************
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| 117 | typedef ULONG (*RPHandler)(RP __far* rp);
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| 118 | RPHandler StratDispatch[] =
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| 119 | {
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| 120 | StratInit, // 00 (BC): Initialization
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| 121 | StratError, // 01 (B ): Media check
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| 122 | StratError, // 02 (B ): Build BIOS parameter block
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| 123 | StratError, // 03 ( ): Unused
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| 124 | StratRead, // 04 (BC): Read
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| 125 | StratError, // 05 ( C): Nondestructive read with no wait
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| 126 | StratError, // 06 ( C): Input status
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| 127 | StratError, // 07 ( C): Input flush
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| 128 | StratWrite, // 08 (BC): Write
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| 129 | StratError, // 09 (BC): Write verify
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| 130 | StratError, // 0A ( C): Output status
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| 131 | StratError, // 0B ( C): Output flush
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| 132 | StratError, // 0C ( ): Unused
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| 133 | StratOpen, // 0D (BC): Open
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| 134 | StratClose, // 0E (BC): Close
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| 135 | StratError, // 0F (B ): Removable media check
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| 136 | StratIOCtl, // 10 (BC): IO Control
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| 137 | StratError, // 11 (B ): Reset media
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| 138 | StratError, // 12 (B ): Get logical unit
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| 139 | StratError, // 13 (B ): Set logical unit
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| 140 | StratError, // 14 ( C): Deinstall character device driver
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| 141 | StratError, // 15 ( ): Unused
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| 142 | StratError, // 16 (B ): Count partitionable fixed disks
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| 143 | StratError, // 17 (B ): Get logical unit mapping of fixed disk
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| 144 | StratError, // 18 ( ): Unused
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| 145 | StratError, // 19 ( ): Unused
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| 146 | StratError, // 1A ( ): Unused
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| 147 | StratError, // 1B ( ): Unused
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| 148 | StratShutdown, // 1C (BC): Notify start or end of system shutdown
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| 149 | StratError, // 1D (B ): Get driver capabilities
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| 150 | StratError, // 1E ( ): Unused
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| 151 | StratInitComplete // 1F (BC): Notify end of initialization
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| 152 | };
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| 153 | //******************************************************************************
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| 154 | // Strategy entry point
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| 155 | //
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| 156 | // The strategy entry point must be declared according to the STRATEGY
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| 157 | // calling convention, which fetches arguments from the correct registers.
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| 158 | //******************************************************************************
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| 159 | ULONG Strategy(RP __far* rp);
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| 160 | #pragma aux (STRATEGY) Strategy "ALSA_STRATEGY";
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| 161 | ULONG Strategy(RP __far* rp)
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| 162 | {
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| 163 | if (rp->Command < sizeof(StratDispatch)/sizeof(StratDispatch[0]))
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| 164 | return(StratDispatch[rp->Command](rp));
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| 165 | else return(RPERR_COMMAND | RPDONE);
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| 166 | }
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| 167 | //******************************************************************************
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| 168 | //******************************************************************************
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