| 1 | /* $Id: irq.cpp,v 1.1.1.1 2003/07/02 13:56:56 eleph Exp $ */
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| 2 | /*
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| 3 | * IRQ handler functions
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| 4 | *
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| 5 | * (C) 2000-2002 InnoTek Systemberatung GmbH
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| 6 | *
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| 7 | * This program is free software; you can redistribute it and/or
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| 8 | * modify it under the terms of the GNU General Public License as
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| 9 | * published by the Free Software Foundation; either version 2 of
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| 10 | * the License, or (at your option) any later version.
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| 11 | *
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| 12 | * This program is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public
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| 18 | * License along with this program; if not, write to the Free
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| 19 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
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| 20 | * USA.
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| 21 | *
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| 22 | */
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| 23 |
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| 24 | #define INCL_NOPMAPI
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| 25 | #define INCL_DOSINFOSEG // Need Global info seg in rm.cpp algorithms
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| 26 | #include <os2.h>
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| 27 |
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| 28 | #include <devhelp.h>
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| 29 | #include <include.h> // Defn's for WatCom based drivers.
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| 30 | #include <irqos2.h>
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| 31 | #include <dbgos2.h>
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| 32 | #include "irq.h"
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| 33 |
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| 34 | // List of handlers here.
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| 35 | static FARPTR16 *pISR[MAX_IRQ_SLOTS] = {
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| 36 | &ISR00,
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| 37 | &ISR01,
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| 38 | &ISR02,
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| 39 | &ISR03,
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| 40 | &ISR04,
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| 41 | &ISR05,
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| 42 | &ISR06,
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| 43 | &ISR07
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| 44 | };
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| 45 |
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| 46 | extern DBGINT DbgInt;
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| 47 |
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| 48 | //******************************************************************************
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| 49 | BOOL ALSA_SetIrq(ULONG ulIrq, ULONG ulSlotNo, BOOL fShared)
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| 50 | {
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| 51 | USHORT rc = 1;
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| 52 |
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| 53 | if( ulSlotNo >= MAX_IRQ_SLOTS )
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| 54 | {
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| 55 | DebugInt3();
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| 56 | return FALSE;
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| 57 | }
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| 58 |
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| 59 | if(fShared)
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| 60 | {
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| 61 | rc = DevIRQSet((WORD16) *pISR[ulSlotNo], (WORD16)ulIrq, 1 ); // first try shared shared
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| 62 | }
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| 63 |
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| 64 | if (rc != 0)
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| 65 | {
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| 66 | rc = DevIRQSet((WORD16) *pISR[ulSlotNo], (WORD16)ulIrq, 0); // failed, so try exclusive instead
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| 67 | }
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| 68 |
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| 69 | if (rc != 0)
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| 70 | {
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| 71 | // If error ...
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| 72 | rprintf(("ERROR: RMSetIrq %d %d %x FAILED to set interrupt.", ulIrq, fShared, ulSlotNo));
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| 73 | DebugInt3();
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| 74 | return FALSE;
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| 75 | }
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| 76 |
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| 77 | return TRUE;
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| 78 | }
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| 79 |
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| 80 | //******************************************************************************
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| 81 | BOOL ALSA_FreeIrq(ULONG ulIrq)
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| 82 | {
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| 83 | return (DevIRQClear((WORD16)ulIrq) == 0);
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| 84 | }
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| 85 |
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| 86 | //******************************************************************************
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| 87 | #pragma aux ALSA_Interrupt "ALSA_Interrupt" parm [ebx]
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| 88 | ULONG ALSA_Interrupt(ULONG ulSlotNo)
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| 89 | {
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| 90 | ULONG ulIrqNo;
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| 91 |
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| 92 | // enable interrupts that have higher priority we should
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| 93 | // allow higher priority interrupts
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| 94 | sti();
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| 95 | if( process_interrupt(ulSlotNo, &ulIrqNo) )
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| 96 | {
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| 97 | DbgInt.ulIntServiced[DbgInt.ulState]++;
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| 98 | // We've cleared all service requests.
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| 99 | // Clear (disable) Interrupts, Send EOI
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| 100 | // and clear the carry flag (tells OS/2 kernel that Int was handled).
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| 101 | // Note carry flag is handled in setup.asm
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| 102 | cli();
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| 103 | DevEOI( (WORD16)ulIrqNo );
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| 104 | return TRUE;
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| 105 | }
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| 106 | DbgInt.ulIntUnserviced[DbgInt.ulState]++;
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| 107 | // Indicate Interrupt not serviced by setting carry flag before
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| 108 | // returning to OS/2 kernel. OS/2 will then shut down the interrupt!
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| 109 | // NOTE: Make sure interrupts are not turned on again when this irq isn't ours!
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| 110 | return FALSE;
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| 111 | }
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| 112 |
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