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| Rev | Author | Line No. | Line |
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| 23 | f9daq | 1 | //------------------------------------------------------------------------- |
| 2 | // WINNT driver for PCICC32 interface from ARW Elektronik, Germany -------- |
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| 3 | // all around irq handling |
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| 4 | // |
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| 5 | // (c) 1999-2002 ARW Elektronik |
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| 6 | // |
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| 7 | // this source code is published under GPL (Open Source). You can use, redistrubute and |
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| 8 | // modify it unless this header is not modified or deleted. No warranty is given that |
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| 9 | // this software will work like expected. |
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| 10 | // This product is not authorized for use as critical component in life support systems |
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| 11 | // wihout the express written approval of ARW Elektronik Germany. |
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| 12 | // |
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| 13 | // Please announce changes and hints to ARW Elektronik |
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| 14 | // |
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| 15 | // what who when |
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| 16 | // started AR 01.08.1999 |
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| 17 | // first release 1.0 AR 17.10.1999 |
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| 18 | // IoConnectInterrupt, share vector now true AR 04.03.2000 |
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| 19 | // globalInterruptEnabledStatus() added AR 24.02.2001 |
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| 20 | // added IRQ handling AR 24.02.2001 |
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| 21 | // added WITH_IRQS switch to switsch off irqs AR 04.10.2001 |
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| 22 | // changed making procedure (only VCC > 6.0) AR 30.05.2002 |
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| 23 | // |
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| 24 | |||
| 25 | //------------------------------------------------------------------------- |
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| 26 | // INCLUDES |
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| 27 | // |
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| 28 | #define WITH_IRQS // comment out for interrupt handling excludes |
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| 29 | // ACHTUNG TEST |
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| 30 | |||
| 31 | //------------------------------------------------------------------------- |
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| 32 | // INCLUDES |
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| 33 | // |
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| 34 | #include <ntddk.h> |
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| 35 | #include <pcicc32_drv.h> |
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| 36 | #include <pcicc32_i.h> |
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| 37 | #include <pcicc32.h> |
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| 38 | #include <pcicc32_local.h> |
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| 39 | |||
| 40 | //------------------------------------------------------------------------ |
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| 41 | // DEFINES |
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| 42 | // |
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| 43 | #ifndef DWORD |
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| 44 | #define DWORD ULONG |
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| 45 | #endif |
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| 46 | |||
| 47 | #ifndef WORD |
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| 48 | #define WORD USHORT |
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| 49 | #endif |
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| 50 | |||
| 51 | //------------------------------------------------------------------------ |
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| 52 | // GLOBALS |
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| 53 | // |
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| 54 | |||
| 55 | //------------------------------------------------------------------------ |
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| 56 | // FUNCTIONS |
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| 57 | // |
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| 58 | |||
| 59 | //------------------------------------------------------------------------ |
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| 60 | // enable and disable of interrupts |
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| 61 | // |
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| 62 | void globalInterruptEnable(PCIADA *pciada) |
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| 63 | { |
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| 64 | #ifdef WITH_IRQS |
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| 65 | WRITE_REGISTER_USHORT(pciada->pwIntCSR, ENABLE_PCIADA_IRQS); |
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| 66 | #endif |
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| 67 | } |
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| 68 | |||
| 69 | void globalInterruptDisable(PCIADA *pciada) |
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| 70 | { |
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| 71 | WRITE_REGISTER_USHORT(pciada->pwIntCSR, DISABLE_PCIADA_IRQS); |
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| 72 | } |
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| 73 | |||
| 74 | unsigned short globalInterruptEnabledStatus(PCIADA *pciada) |
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| 75 | { |
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| 76 | unsigned short wStatus; |
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| 77 | |||
| 78 | wStatus = READ_REGISTER_USHORT(pciada->pwIntCSR); |
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| 79 | |||
| 80 | if ((wStatus & ENABLE_PCIADA_IRQS) == ENABLE_PCIADA_IRQS) |
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| 81 | return 1; |
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| 82 | |||
| 83 | return 0; |
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| 84 | } |
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| 85 | |||
| 86 | //------------------------------------------------------------------------ |
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| 87 | // determine which interrupt and evaluates status if appropriate |
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| 88 | // |
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| 89 | static int evaluateIrqStatus(PCIADA *pciada, ULONG *dwIrqStatus) |
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| 90 | { |
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| 91 | volatile USHORT wCntrl; |
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| 92 | int result = 0; |
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| 93 | |||
| 94 | wCntrl = READ_REGISTER_USHORT(pciada->pwCntrl); |
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| 95 | if (wCntrl & 0x100) // pciada switched on ? |
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| 96 | { |
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| 97 | volatile USHORT wIntCSR = READ_REGISTER_USHORT(pciada->pwIntCSR); |
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| 98 | |||
| 99 | if (wIntCSR & 0x0040) // are the interrupts enabled? |
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| 100 | { |
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| 101 | if (wIntCSR & 0x20) |
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| 102 | { |
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| 103 | // it's the pci interrupt # 2 |
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| 104 | globalInterruptDisable(pciada); // disable following interrupts |
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| 105 | |||
| 106 | // get current Cntrl - and clear interrupt |
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| 107 | WRITE_REGISTER_USHORT(pciada->pwCntrl, (USHORT)(wCntrl & ~0x0100)); // disable |
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| 108 | WRITE_REGISTER_USHORT(pciada->pwCntrl, wCntrl); // enable again |
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| 109 | |||
| 110 | *dwIrqStatus = CONNECTION_TIMEOUT; |
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| 111 | |||
| 112 | result = 1; |
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| 113 | } |
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| 114 | |||
| 115 | if (wIntCSR & 0x04) |
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| 116 | { |
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| 117 | globalInterruptDisable(pciada); // disable following interrupts |
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| 118 | |||
| 119 | *dwIrqStatus = READ_REGISTER_ULONG(_DWORD_NAF(pciada->pvVirtIfr, 28, 2, 0)); |
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| 120 | |||
| 121 | // clear pending interrupt - LAM-FF |
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| 122 | WRITE_REGISTER_USHORT(_WORD_NAF(pciada->pvVirtIfr, 28, 0, 16), 0); |
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| 123 | |||
| 124 | result = 1; |
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| 125 | } |
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| 126 | } |
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| 127 | } |
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| 128 | |||
| 129 | return result; |
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| 130 | } |
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| 131 | |||
| 132 | //------------------------------------------------------------------------ |
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| 133 | // main interrupt handler function |
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| 134 | // |
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| 135 | static BOOLEAN irq_service(PKINTERRUPT Interrupt, PVOID ServiceContext) |
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| 136 | { |
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| 137 | PCIADA *pciada = (PCIADA *)ServiceContext; |
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| 138 | |||
| 139 | #ifndef WITH_IRQS |
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| 140 | return FALSE; |
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| 141 | #endif |
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| 142 | |||
| 143 | if (!evaluateIrqStatus(pciada, &pciada->dwIrqStatus)) |
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| 144 | { |
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| 145 | // KdPrint(("Not my irq.\n")); |
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| 146 | return FALSE; |
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| 147 | } |
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| 148 | |||
| 149 | // fire custom deffered procedure call |
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| 150 | KeInsertQueueDpc(&pciada->kDPCobj, (PVOID)pciada, (PVOID)&pciada->dwIrqStatus); |
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| 151 | |||
| 152 | KdPrint(("irq_service(0x%08x)\n", pciada->dwIrqStatus)); |
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| 153 | return TRUE; |
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| 154 | } |
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| 155 | |||
| 156 | //------------------------------------------------------------------------ |
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| 157 | // translate interrupt resources for PCIADAs to hardware independent ones |
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| 158 | // |
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| 159 | NTSTATUS PCICC32TranslateInterrupt(PDEVICE_OBJECT device_Obj) |
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| 160 | { |
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| 161 | int i; |
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| 162 | NTSTATUS result = STATUS_SUCCESS; |
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| 163 | DEVICE_EXT *pDevExt = (DEVICE_EXT*)device_Obj->DeviceExtension; |
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| 164 | int nPCIADAs = pDevExt->nPCIADAs; |
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| 165 | PCIADA *pciada; |
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| 166 | |||
| 167 | KdPrint(("PCICC32TranslateInterrupt()\n")); |
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| 168 | |||
| 169 | for (i = 0; i < nPCIADAs; i++) |
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| 170 | { |
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| 171 | pciada = &pDevExt->pciada[i]; |
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| 172 | |||
| 173 | KdPrint(("In - Bus:%d, IrqLine:%d\n", pciada->Bus, pciada->Irql)); |
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| 174 | |||
| 175 | if (pciada->Irql) |
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| 176 | { |
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| 177 | pciada->Vector = HalGetInterruptVector(PCIBus, pciada->Bus, |
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| 178 | pciada->Irql, pciada->Vector, |
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| 179 | &pciada->Irql, &pciada->Affinity); |
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| 180 | |||
| 181 | KdPrint(("Out - Irql:%d, Vector: %d, Affinity:%d\n", pciada->Irql, pciada->Vector, pciada->Affinity)); |
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| 182 | |||
| 183 | } |
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| 184 | else |
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| 185 | result = STATUS_BIOS_FAILED_TO_CONNECT_INTERRUPT; |
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| 186 | } |
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| 187 | |||
| 188 | return result; |
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| 189 | } |
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| 190 | |||
| 191 | //------------------------------------------------------------------------ |
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| 192 | // connect service routines to all PCIADA interrupts |
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| 193 | // |
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| 194 | NTSTATUS PCICC32ConnectInterrupt(PDEVICE_OBJECT device_Obj) |
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| 195 | { |
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| 196 | #ifdef WITH_IRQS |
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| 197 | int i; |
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| 198 | NTSTATUS result = STATUS_SUCCESS; |
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| 199 | DEVICE_EXT *pDevExt = (DEVICE_EXT*)device_Obj->DeviceExtension; |
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| 200 | int nPCIADAs = pDevExt->nPCIADAs; |
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| 201 | PCIADA *pciada; |
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| 202 | |||
| 203 | KdPrint(("PCICC32ConnectInterrupt()\n")); |
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| 204 | |||
| 205 | // connect the interrupts to service routines |
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| 206 | for (i = 0; i < nPCIADAs; i++) |
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| 207 | { |
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| 208 | pciada = &pDevExt->pciada[i]; |
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| 209 | |||
| 210 | pciada->InterruptObject = NULL; |
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| 211 | |||
| 212 | if (pciada->Vector) |
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| 213 | result = IoConnectInterrupt(&pciada->InterruptObject, |
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| 214 | irq_service, |
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| 215 | (PVOID)pciada, |
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| 216 | NULL, |
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| 217 | pciada->Vector, |
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| 218 | pciada->Irql, |
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| 219 | pciada->Irql, |
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| 220 | LevelSensitive, |
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| 221 | TRUE, |
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| 222 | pciada->Affinity, |
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| 223 | FALSE); |
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| 224 | |||
| 225 | KdPrint(("irq_service:%p, VirtVect:%d, Irql:%d, hIrql:%d, Aff:0x%08x, Status:0x%08x\n", |
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| 226 | irq_service, pciada->Vector, pciada->Irql, |
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| 227 | pciada->Irql, pciada->Affinity, result)); |
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| 228 | |||
| 229 | if (result != STATUS_SUCCESS) |
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| 230 | break; |
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| 231 | } |
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| 232 | |||
| 233 | if (result == STATUS_SUCCESS) |
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| 234 | { |
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| 235 | KdPrint(("PCICC32ConnectInterrupt() OK.\n")); |
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| 236 | } |
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| 237 | |||
| 238 | return result; |
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| 239 | #else |
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| 240 | return STATUS_SUCCESS; |
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| 241 | #endif |
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| 242 | } |
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| 243 | |||
| 244 | //------------------------------------------------------------------------ |
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| 245 | // dis-connect service routines to all PCIADA interrupts |
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| 246 | // |
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| 247 | NTSTATUS PCICC32DisConnectInterrupt(PDEVICE_OBJECT device_Obj) |
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| 248 | { |
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| 249 | #ifdef WITH_IRQS |
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| 250 | int i; |
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| 251 | DEVICE_EXT *pDevExt = (DEVICE_EXT*)device_Obj->DeviceExtension; |
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| 252 | int nPCIADAs = pDevExt->nPCIADAs; |
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| 253 | PCIADA *pciada; |
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| 254 | |||
| 255 | KdPrint(("DisConnectInterrupt()\n")); |
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| 256 | |||
| 257 | // dis connect the interrupts to service routines |
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| 258 | for (i = 0; i < nPCIADAs; i++) |
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| 259 | { |
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| 260 | pciada = &pDevExt->pciada[i]; |
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| 261 | |||
| 262 | KdPrint(("IrqObj:0x%08x\n", pciada->InterruptObject)); |
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| 263 | |||
| 264 | if (pciada->InterruptObject) |
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| 265 | { |
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| 266 | IoDisconnectInterrupt(pciada->InterruptObject); |
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| 267 | pciada->InterruptObject = 0; |
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| 268 | } |
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| 269 | } |
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| 270 | #endif |
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| 271 | |||
| 272 | return STATUS_SUCCESS; |
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| 273 | } |
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| 274 | |||
| 275 |