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Annotation of XNU/iokit/bsddev/IOBSDConsole.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: #include <IOKit/assert.h>
        !            23: #include <IOKit/IOMessage.h>
        !            24: #include <IOKit/IOLib.h>
        !            25: #include "IOBSDConsole.h"
        !            26: #include <IOKit/hidsystem/IOHIKeyboard.h>
        !            27: #include <IOKit/hidsystem/IOLLEvent.h>
        !            28: #include <IOKit/audio/IOAudio.h>
        !            29: 
        !            30: static IOBSDConsole * gBSDConsoleInst = 0;
        !            31: bool displayWranglerPublished( OSObject *, void *, IOService * );
        !            32: 
        !            33: #define super IOService
        !            34: OSDefineMetaClassAndStructors(IOBSDConsole, IOService);
        !            35: 
        !            36: //************************************************************************
        !            37: 
        !            38: bool IOBSDConsole::start(IOService * provider)
        !            39: {
        !            40:     OSObject * notify;
        !            41: 
        !            42:     if (!super::start(provider))  return false;
        !            43: 
        !            44:     assert( gBSDConsoleInst == 0 );
        !            45:     gBSDConsoleInst = this;
        !            46: 
        !            47:     notify = addNotification( gIOPublishNotification,
        !            48:         serviceMatching("IOHIKeyboard"),
        !            49:         (IOServiceNotificationHandler) &IOBSDConsole::publishNotificationHandler,
        !            50:         this, 0 );
        !            51:     assert( notify );
        !            52: 
        !            53:     notify = addNotification( gIOPublishNotification,
        !            54:         serviceMatching("IODisplayWrangler"),
        !            55:                               (IOServiceNotificationHandler)displayWranglerPublished,
        !            56:          this, 0 );
        !            57:     assert( notify ); 
        !            58: 
        !            59:     notify = addNotification( gIOPublishNotification,
        !            60:         serviceMatching("IOAudioStream"),
        !            61:         (IOServiceNotificationHandler) &IOBSDConsole::publishNotificationHandler,
        !            62:         this, this );
        !            63:     assert( notify );
        !            64: 
        !            65:     return( true );
        !            66: }
        !            67: 
        !            68: bool IOBSDConsole::publishNotificationHandler(
        !            69:                            IOBSDConsole * self,
        !            70:                             void * ref,
        !            71:                             IOService * newService )
        !            72: 
        !            73: {
        !            74:     IOHIKeyboard *     keyboard;
        !            75:     IOAudioStream *    audio;
        !            76: 
        !            77:     if( ref) {
        !            78:         keyboard = 0;
        !            79:         audio = OSDynamicCast(IOAudioStream, newService);
        !            80:         if(audio) {
        !            81:             SInt32     isOut;
        !            82:             audio->isOutput(&isOut);
        !            83:             if(isOut)
        !            84:                 self->fAudioOut = audio;       // A stream we can write to
        !            85:        }
        !            86: 
        !            87:     } else {
        !            88:        audio = 0;
        !            89:         keyboard = OSDynamicCast( IOHIKeyboard, newService );
        !            90: 
        !            91:         if( keyboard && self->attach( keyboard ))
        !            92:             self->arbitrateForKeyboard( keyboard );
        !            93:     }
        !            94: 
        !            95:     if( !keyboard && !audio)
        !            96:        IOLog("%s: strange service notify \"%s\"\n",
        !            97:                self->getName(), newService->getName());
        !            98: 
        !            99:     return true;
        !           100: }
        !           101: 
        !           102: // **********************************************************************************
        !           103: // displayWranglerPublished
        !           104: //
        !           105: // The Display Wrangler has appeared.  We will be calling its
        !           106: // ActivityTickle method when there is user activity.
        !           107: // **********************************************************************************
        !           108: bool displayWranglerPublished( OSObject * us, void * ref, IOService * yourDevice )
        !           109: {
        !           110:  if ( yourDevice != NULL ) {
        !           111:      ((IOBSDConsole *)us)->displayManager = yourDevice;
        !           112:  }
        !           113:  return true;
        !           114: }
        !           115: 
        !           116: 
        !           117: //************************************************************************
        !           118: // Keyboard client stuff
        !           119: //************************************************************************
        !           120: 
        !           121: void IOBSDConsole::arbitrateForKeyboard( IOHIKeyboard * nub )
        !           122: {
        !           123:   nub->open(this, 0,
        !           124:        keyboardEvent, keyboardSpecialEvent, updateEventFlags);
        !           125:   // failure can be expected if the HID system already has it
        !           126: }
        !           127: 
        !           128: IOReturn IOBSDConsole::message(UInt32 type, IOService * provider,
        !           129:                                void * argument)
        !           130: {
        !           131:   IOReturn     status = kIOReturnSuccess;
        !           132: 
        !           133:   switch (type)
        !           134:   {
        !           135:     case kIOMessageServiceIsTerminated:
        !           136:     case kIOMessageServiceIsRequestingClose:
        !           137:       provider->close( this );
        !           138:       break;
        !           139: 
        !           140:     case kIOMessageServiceWasClosed:
        !           141:       arbitrateForKeyboard( (IOHIKeyboard *) provider );
        !           142:       break;
        !           143: 
        !           144:     default:
        !           145:       status = super::message(type, provider, argument);
        !           146:       break;
        !           147:   }
        !           148: 
        !           149:   return status;
        !           150: }
        !           151: 
        !           152: extern "C" {
        !           153:   void cons_cinput( char c);
        !           154: }
        !           155: #warning REMOVE cons_cinput DECLARATION FROM HERE
        !           156: 
        !           157: void IOBSDConsole::keyboardEvent(OSObject * target,
        !           158:           /* eventType */        unsigned   eventType,
        !           159:           /* flags */            unsigned   /* flags */,
        !           160:           /* keyCode */          unsigned   /* key */,
        !           161:           /* charCode */         unsigned   charCode,
        !           162:           /* charSet */          unsigned   charSet,
        !           163:           /* originalCharCode */ unsigned   /* origCharCode */,
        !           164:           /* originalCharSet */  unsigned   /* origCharSet */,
        !           165:           /* repeat */           bool       /* repeat */,
        !           166:           /* atTime */           AbsoluteTime /* ts */)
        !           167: {
        !           168:     static const char cursorCodes[] = { 'D', 'A', 'C', 'B' };
        !           169: 
        !           170:     if ( ((IOBSDConsole *)target)->displayManager != NULL ) {                          // if there is a display manager,
        !           171:         ((IOBSDConsole *)target)->displayManager->activityTickle(kIOPMSuperclassPolicy1);      // tell it there is user activity
        !           172:     }
        !           173: 
        !           174:     if( eventType == NX_KEYDOWN) {
        !           175:         if( (charSet == NX_SYMBOLSET)
        !           176:             && (charCode >= 0xac) && (charCode <= 0xaf)) {
        !           177:             cons_cinput( '\033');
        !           178:             cons_cinput( 'O');
        !           179:             charCode = cursorCodes[ charCode - 0xac ];
        !           180:         }
        !           181:         cons_cinput( charCode);
        !           182:     }
        !           183: }
        !           184: 
        !           185: void IOBSDConsole::keyboardSpecialEvent(OSObject * target,
        !           186:                         /* eventType */ unsigned   /* eventType */,
        !           187:                         /* flags */     unsigned   /* flags */,
        !           188:                         /* keyCode */   unsigned   /* key */,
        !           189:                         /* specialty */ unsigned   /* flavor */,
        !           190:                         /* atTime */    AbsoluteTime /* ts */)
        !           191: {
        !           192:     if ( ((IOBSDConsole *)target)->displayManager != NULL ) {                          // if there is a display manager,
        !           193:         ((IOBSDConsole *)target)->displayManager->activityTickle(kIOPMSuperclassPolicy1);      // tell it there is user activity
        !           194:     }
        !           195:   return;
        !           196: }
        !           197: void IOBSDConsole::updateEventFlags(OSObject * /*target*/, unsigned /*flags*/)
        !           198: {
        !           199:   return;
        !           200: }
        !           201: 
        !           202: //************************************************************************
        !           203: // Utility sound making stuff, callable from C
        !           204: //************************************************************************
        !           205: extern "C" {
        !           206:   int asc_ringbell();
        !           207: }
        !           208: 
        !           209: /*
        !           210: * Make some sort of noise if possible, else return false
        !           211: */
        !           212: int asc_ringbell()
        !           213: {
        !           214:     IOAudioStream *output;
        !           215: 
        !           216:     if(gBSDConsoleInst && (output = gBSDConsoleInst->getAudioOut())) {
        !           217:         int dmaBlockStart, dmaBlockEnd;
        !           218:         int i;
        !           219:         IOAudioStreamStatus *status;
        !           220:         short *sampleBuffer;
        !           221:         IOByteCount bufSize;
        !           222:         IOUserClient *handler;
        !           223:        IOMemoryMap *statusMap;
        !           224:        IOMemoryMap *sampleMap;
        !           225:         IOReturn ret;
        !           226:         int j, div, mul;
        !           227:         int size;
        !           228:         int val;
        !           229: 
        !           230:         ret = output->newUserClient( kernel_task, NULL, 0, &handler );
        !           231:         if(kIOReturnSuccess != ret)
        !           232:             return false;
        !           233: 
        !           234:        sampleMap = output->mapClientMemory( kSampleBuffer, kernel_task  );
        !           235:        assert(sampleMap);
        !           236:        sampleBuffer = (short *) sampleMap->getVirtualAddress();
        !           237:        bufSize = sampleMap->getLength();
        !           238: 
        !           239:        statusMap = output->mapClientMemory( kStatus, kernel_task );
        !           240:        assert(statusMap);
        !           241:        status = (IOAudioStreamStatus *) statusMap->getVirtualAddress();
        !           242: 
        !           243:         assert(status->fSampleSize == 2);
        !           244:         // Put 1/10 second of 440Hz sound in the buffer, starting just after the current block.
        !           245:         div = status->fDataRate/status->fSampleSize/status->fChannels/440;
        !           246:         mul = 0x4000/div;
        !           247:         size = status->fDataRate/status->fSampleSize/status->fChannels/10;
        !           248:         dmaBlockStart = status->fCurrentBlock * status->fBlockSize;
        !           249:         dmaBlockEnd = dmaBlockStart + status->fBlockSize;
        !           250:         for(i=dmaBlockEnd/2; i<status->fBufSize/2; i += status->fChannels){
        !           251:             if(!--size)
        !           252:                break;
        !           253:             val = (size) % div;
        !           254:             if(val > div/2)
        !           255:                 val = div/2 - val;
        !           256:             val = val*mul - 0x1000;
        !           257:             for(j=0; j<status->fChannels; j++) {
        !           258:                sampleBuffer[i+j] = val;
        !           259:             }
        !           260:         }
        !           261:         if(size)
        !           262:             for(i=0; i<dmaBlockStart/2; i += status->fChannels){
        !           263:                 if(!--size)
        !           264:                     break;
        !           265:                 val = (size) % div;
        !           266:                 if(val > div/2)
        !           267:                     val = div/2 - val;
        !           268:                 val = val*mul - 0x1000;
        !           269:                 for(j=0; j<status->fChannels; j++) {
        !           270:                     sampleBuffer[i+j] = val;
        !           271:                 }
        !           272:             }
        !           273: 
        !           274:        sampleMap->release();
        !           275:        statusMap->release();
        !           276:         handler->clientClose();
        !           277:         return true;
        !           278:     }
        !           279:     else
        !           280:         return false;
        !           281: }

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