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Annotation of XNU/iokit/Drivers/usb/drvAppleOHCI/AppleOHCI_Interrupts.cpp, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
        !            24:  *
        !            25:  * HISTORY
        !            26:  *
        !            27:  */
        !            28: 
        !            29: 
        !            30: #include "AppleOHCI.h"
        !            31: #include <libkern/OSByteOrder.h>
        !            32: 
        !            33: #define nil (0)
        !            34: #define DEBUGGING_LEVEL 0      // 1 = low; 2 = high; 3 = extreme
        !            35: 
        !            36: #define super IOUSBController
        !            37: #define self this
        !            38: 
        !            39: void AppleOHCI::pollInterrupts(IOUSBCompletionAction safeAction)
        !            40: {
        !            41:     register OHCIRegistersPtr  pOHCIRegisters;
        !            42:     register UInt32            activeInterrupts;
        !            43:     register UInt32            interruptEnable;
        !            44: 
        !            45:     pOHCIRegisters = pOHCIUIMData->pOHCIRegisters;
        !            46: 
        !            47:     interruptEnable = OSSwapInt32(pOHCIRegisters->hcInterruptEnable);
        !            48: 
        !            49:     activeInterrupts = interruptEnable &
        !            50:         OSSwapInt32(pOHCIRegisters->hcInterruptStatus);
        !            51: 
        !            52:     if ((interruptEnable & kOHCIHcInterrupt_MIE) && (activeInterrupts != 0))
        !            53:     {
        !            54:         /*
        !            55:          * SchedulingOverrun Interrupt
        !            56:          */
        !            57:         if (activeInterrupts & kOHCIHcInterrupt_SO)
        !            58:         {
        !            59:             pOHCIUIMData->errors.scheduleOverrun++;
        !            60:             pOHCIRegisters->hcInterruptStatus = OSSwapInt32(kOHCIHcInterrupt_SO);
        !            61:             IOSync();
        !            62: 
        !            63: #if (DEBUGGING_LEVEL > 0)
        !            64:             IOLog("<SchedulingOverrun Interrupt>\n");
        !            65: #endif
        !            66:         }
        !            67:         /*
        !            68:          * WritebackDoneHead Interrupt
        !            69:          */
        !            70:         if (activeInterrupts & kOHCIHcInterrupt_WDH)
        !            71:         {
        !            72:             UIMProcessDoneQueue(safeAction);
        !            73: 
        !            74: #if (DEBUGGING_LEVEL > 0)
        !            75:             IOLog("<WritebackDoneHead Interrupt>\n");
        !            76: #endif
        !            77:         }
        !            78:         /*
        !            79:          * StartofFrame Interrupt
        !            80:          */
        !            81:         if (activeInterrupts & kOHCIHcInterrupt_SF)
        !            82:         {
        !            83:             // Clear the interrrupt
        !            84:             pOHCIRegisters->hcInterruptStatus = OSSwapInt32(kOHCIHcInterrupt_SF);
        !            85: 
        !            86:             // and mask it off so it doesn't happen again.
        !            87:             // will have to be turned on manually to happen again.
        !            88:             pOHCIRegisters->hcInterruptDisable = OSSwapInt32(kOHCIHcInterrupt_SF);
        !            89: 
        !            90: #if (DEBUGGING_LEVEL > 0)
        !            91:             IOLog("<Frame Interrupt>\n");
        !            92: #endif
        !            93:             // FIXME? ERIC performCommand(ROOT_HUB_FRAME, (void *)0);
        !            94:         }
        !            95:         /*
        !            96:          * ResumeDetected Interrupt
        !            97:          */
        !            98:         if (activeInterrupts & kOHCIHcInterrupt_RD)
        !            99:         {
        !           100:             pOHCIRegisters->hcInterruptStatus = OSSwapInt32(kOHCIHcInterrupt_RD);
        !           101: #if (DEBUGGING_LEVEL > 0)
        !           102:             IOLog("<ResumeDetected Interrupt>\n");
        !           103: #endif
        !           104:         }
        !           105:         /*
        !           106:          * Unrecoverable Error Interrupt
        !           107:          */
        !           108:         if (activeInterrupts & kOHCIHcInterrupt_UE)
        !           109:         {
        !           110:             pOHCIUIMData->errors.unrecoverableError++;
        !           111:             // Let's do a SW reset to recover from this condition.
        !           112:             // We could make sure all OCHI registers and in-memory
        !           113:             // data structures are valid, too.
        !           114:             pOHCIRegisters->hcCommandStatus = OSSwapInt32
        !           115:                                                 (kOHCIHcCommandStatus_HCR);
        !           116:             delay(10 * MICROSECOND);
        !           117:             pOHCIRegisters->hcInterruptStatus = OSSwapInt32(kOHCIHcInterrupt_UE);
        !           118:             // zzzz - note I'm leaving the Control/Bulk list processing off
        !           119:             // for now.  FIXME? ERIC
        !           120: 
        !           121:             pOHCIRegisters->hcControl = OSSwapInt32
        !           122:                 ((kOHCIFunctionalState_Operational << kOHCIHcControl_HCFSPhase)
        !           123:                  | kOHCIHcControl_PLE);
        !           124: 
        !           125: #if (DEBUGGING_LEVEL > 0)
        !           126:             IOLog("<Unrecoverable Error Interrupt>\n");
        !           127: #endif
        !           128:         }
        !           129:         /*
        !           130:          * FrameNumberOverflow Interrupt
        !           131:          */
        !           132:         if (activeInterrupts & kOHCIHcInterrupt_FNO)
        !           133:         {
        !           134:             // not really an error, but close enough
        !           135:             pOHCIUIMData->errors.frameNumberOverflow++;
        !           136:             if ((OSReadLittleInt16 (pOHCIUIMData->pHCCA, 0x80)
        !           137:                  & kOHCIFmNumberMask) < kOHCIBit15)
        !           138:             {
        !           139:                 pOHCIUIMData->frameNumber += kOHCIFrameOverflowBit;
        !           140:             }
        !           141:             pOHCIRegisters->hcInterruptStatus = OSSwapInt32(kOHCIHcInterrupt_FNO);
        !           142: #if (DEBUGGING_LEVEL > 0)
        !           143:             IOLog("<FrameNumberOverflow Interrupt>\n");
        !           144: #endif
        !           145:         }
        !           146:         /*
        !           147:          * RootHubStatusChange Interrupt
        !           148:          */
        !           149:         if (activeInterrupts & kOHCIHcInterrupt_RHSC)
        !           150:         {
        !           151:             // Clear status change.
        !           152:             pOHCIRegisters->hcInterruptStatus =
        !           153:                                             OSSwapInt32(kOHCIHcInterrupt_RHSC);
        !           154: 
        !           155: #if (DEBUGGING_LEVEL > 0)
        !           156:             IOLog("<RHSC Interrupt>\n");
        !           157: #endif
        !           158: 
        !           159:             UIMRootHubStatusChange();
        !           160:         }
        !           161:         /*
        !           162:          * OwnershipChange Interrupt
        !           163:          */
        !           164:         if (activeInterrupts & kOHCIHcInterrupt_OC)
        !           165:         {
        !           166:             // well, we certainly weren't expecting this!
        !           167:             pOHCIUIMData->errors.ownershipChange++;
        !           168:             pOHCIRegisters->hcInterruptStatus = OSSwapInt32(kOHCIHcInterrupt_OC);
        !           169: 
        !           170: #if (DEBUGGING_LEVEL > 0)
        !           171:             IOLog("<OwnershipChange Interrupt>\n");
        !           172: #endif
        !           173:         }
        !           174:     }
        !           175: }
        !           176: 
        !           177: void AppleOHCI::OHCIUIMInterruptHandler(OSObject *owner,
        !           178:                                         IOInterruptEventSource * /*source*/,
        !           179:                                         int /*count*/)
        !           180: {
        !           181:     register AppleOHCI         *controller = (AppleOHCI *) owner;
        !           182: 
        !           183:     if (!controller)
        !           184:         return;
        !           185:     // Finish pending transactions first.
        !           186:     controller->finishPending();
        !           187:     controller->pollInterrupts();
        !           188: }
        !           189: 
        !           190: extern void print_td(OHCIGeneralTransferDescriptorPtr x);

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