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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 |