/
IOATADevConfig.cpp
611 lines (421 loc) · 13.1 KB
/
IOATADevConfig.cpp
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/*
* Copyright (c) 2000-2008 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/*
*
* IOATADevConfig.cpp
*
*/
const int configword = 00;
const int pioModeNumber = 51;
const int fieldValidity = 53;
const int mwDMAWord = 63;
const int pioAdvancedMode = 64;
const int minimumDMATime = 65;
const int recommendDMATime = 66;
const int pioCycleNoFlow = 67;
const int pioCycleIORDY = 68;
const int ultraDMAWord = 88;
#include<IOKit/IOTypes.h>
#include"IOATATypes.h"
#include"IOATADevConfig.h"
#include"IOATABusInfo.h"
#ifdef DLOG
#undef DLOG
#endif
#ifdef ATA_DEBUG
#define DLOG(fmt, args...) IOLog(fmt, ## args)
#else
#define DLOG(fmt, args...)
#endif
//---------------------------------------------------------------------------
#define super OSObject
OSDefineMetaClassAndStructors ( IOATADevConfig, OSObject )
OSMetaClassDefineReservedUnused(IOATADevConfig, 0);
OSMetaClassDefineReservedUnused(IOATADevConfig, 1);
OSMetaClassDefineReservedUnused(IOATADevConfig, 2);
OSMetaClassDefineReservedUnused(IOATADevConfig, 3);
OSMetaClassDefineReservedUnused(IOATADevConfig, 4);
OSMetaClassDefineReservedUnused(IOATADevConfig, 5);
OSMetaClassDefineReservedUnused(IOATADevConfig, 6);
OSMetaClassDefineReservedUnused(IOATADevConfig, 7);
OSMetaClassDefineReservedUnused(IOATADevConfig, 8);
OSMetaClassDefineReservedUnused(IOATADevConfig, 9);
OSMetaClassDefineReservedUnused(IOATADevConfig, 10);
OSMetaClassDefineReservedUnused(IOATADevConfig, 11);
OSMetaClassDefineReservedUnused(IOATADevConfig, 12);
OSMetaClassDefineReservedUnused(IOATADevConfig, 13);
OSMetaClassDefineReservedUnused(IOATADevConfig, 14);
OSMetaClassDefineReservedUnused(IOATADevConfig, 15);
OSMetaClassDefineReservedUnused(IOATADevConfig, 16);
OSMetaClassDefineReservedUnused(IOATADevConfig, 17);
OSMetaClassDefineReservedUnused(IOATADevConfig, 18);
OSMetaClassDefineReservedUnused(IOATADevConfig, 19);
OSMetaClassDefineReservedUnused(IOATADevConfig, 20);
IOATADevConfig*
IOATADevConfig::atadevconfig(void)
{
IOATADevConfig* config = new IOATADevConfig;
if( !config )
return 0L;
if( !config->init() )
{
return 0L;
}
return config;
}
// intialize the data fields to nil values
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
bool
IOATADevConfig::init( )
{
if( ! super::init() )
return false;
_atapiIRQForPacket = kATAPIUnknown;
_ataPIOMode = 0x00;
_ataPIOCycleTime = 0;
_ataMultiDMAMode = 0x00;
_ataMultiCycleTime = 0;
_ataUltraDMAMode = 0x00;
// _ataUltraCycleTime = 0;
return true;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
IOReturn
IOATADevConfig::initWithBestSelection( const UInt16* identifyData, IOATABusInfo* busInfo)
{
IOReturn err = kATANoErr;
err = assignFromData( identifyData );
if( err )
return err;
// AND mask with the modes supported by the bus controller
_ataPIOMode = _ataPIOMode & busInfo->getPIOModes();
_ataMultiDMAMode = _ataMultiDMAMode & busInfo->getDMAModes();
_ataUltraDMAMode = _ataUltraDMAMode & busInfo->getUltraModes();
// select only one kind of DMA mode, preferring UDMA over MWDMA
if( _ataUltraDMAMode != 0x00 )
{
_ataMultiDMAMode = 0x00;
}
// clear all but the most-significant matching bit to indicate the best match between
// device and bus.
_ataPIOMode = _MostSignificantBit(_ataPIOMode);
_ataMultiDMAMode = _MostSignificantBit(_ataMultiDMAMode);
_ataUltraDMAMode = _MostSignificantBit(_ataUltraDMAMode);
return kATANoErr;
}
//-----------------------------------------------------------------------------
IOReturn
IOATADevConfig::assignFromData( const UInt16* identifyData )
{
if ( ( identifyData[0] & 0xC000 ) == 0xC000 )
{
// unknown device type
return kATAErrUnknownType;
}
// for atapi devices, figure out the command-to-packet protocol
if( ( identifyData[0] & 0x8000 ) )
{
// Atapi device that uses INTRQ
_atapiIRQForPacket = ( atapiConfig )( ( identifyData[0] & 0x0060 ) >> 5 );
}
_AssignPIOData ( identifyData );
_AssignDMAData ( identifyData );
_AssignUltraData ( identifyData );
return kATANoErr;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
IOReturn
IOATADevConfig::_AssignPIOData( const UInt16* identifyData)
{
UInt16 advancedPIO = 0x0000;
// set internal fields to no modes.
_ataPIOCycleTime = 0;
_ataPIOMode = 0;
//Check word 53 bit 1 if advanced fields are valid.
if( 0x0002 & identifyData[fieldValidity] )
{
advancedPIO = (identifyData[ pioAdvancedMode ] & 0x03) << 3 ;
if(advancedPIO != 0x0000)
{
// set ns cycle time.
_ataPIOCycleTime = identifyData[ pioCycleIORDY ];
if( _ataPIOCycleTime == 0 )
{
// some devices fail to support cycle times.
// supply a default setting that equals PIO mode 3 timing
_ataPIOCycleTime = 180;
}
// set all lower mode bits as per ATA standards
_ataPIOMode = advancedPIO | 0x0007;
return kATANoErr;
}
// otherwise fall through and use the mode number in word 51.
}
// Otherwise, this is a basic device
switch( identifyData[ pioModeNumber] & 0xFF00 )
{
case 0x0200:
_ataPIOMode = 0x07; // mode 2, 1, 0
_ataPIOCycleTime = 240;
break;
case 0x0100:
_ataPIOMode = 0x03; // mode 1, 0
_ataPIOCycleTime = 383;
break;
default:
_ataPIOMode = 0x01; // mode 0 only.
_ataPIOCycleTime = 600;
break;
}
return kATANoErr;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
IOReturn
IOATADevConfig::_AssignDMAData(const UInt16* identifyData)
{
// set internal fields to no support
_ataMultiDMAMode = 0;
_ataMultiCycleTime = 0;
//Check word 53 bit 1 if dma fields are valid.
if( 0x0002 & identifyData[fieldValidity] )
{
_ataMultiDMAMode = identifyData[mwDMAWord] & 0x0007;
if( identifyData[recommendDMATime] > identifyData[minimumDMATime] )
{
_ataMultiCycleTime = identifyData[recommendDMATime];
} else {
_ataMultiCycleTime = identifyData[minimumDMATime];
}
}
return kATANoErr;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
IOReturn
IOATADevConfig::_AssignUltraData(const UInt16* identifyData)
{
// set internal fields to no support
_ataUltraDMAMode = 0;
//Check word 53 bit 2 if ultra fields are valid.
if( 0x0004 & identifyData[fieldValidity] )
{
_ataUltraDMAMode = identifyData[ultraDMAWord] & 0x00FF;
}
return kATANoErr;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
void
IOATADevConfig::setPacketConfig ( atapiConfig packetConfig)
{
_atapiIRQForPacket = packetConfig;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
atapiConfig
IOATADevConfig::getPacketConfig( void )
{
return _atapiIRQForPacket;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
void
IOATADevConfig::setPIOMode( UInt8 inModeBitMap)
{
_ataPIOMode = inModeBitMap;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
UInt8
IOATADevConfig::getPIOMode( void )
{
return _ataPIOMode;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
void
IOATADevConfig::setDMAMode( UInt8 inModeBitMap )
{
_ataMultiDMAMode = inModeBitMap;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
UInt8
IOATADevConfig::getDMAMode( void )
{
return _ataMultiDMAMode;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
void
IOATADevConfig::setUltraMode( UInt8 inModeBitMap )
{
_ataUltraDMAMode = inModeBitMap;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
UInt8
IOATADevConfig::getUltraMode( void )
{
return _ataUltraDMAMode;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
void
IOATADevConfig::setPIOCycleTime( UInt16 inNS )
{
_ataPIOCycleTime = inNS;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
UInt16
IOATADevConfig::getPIOCycleTime( void )
{
return _ataPIOCycleTime;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
void
IOATADevConfig::setDMACycleTime( UInt16 inNS )
{
_ataMultiCycleTime = inNS;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
UInt16
IOATADevConfig::getDMACycleTime( void )
{
return _ataMultiCycleTime;
}
/*-----------------------------------------------------------------------------
*
*
*-----------------------------------------------------------------------------*/
UInt8
IOATADevConfig::_MostSignificantBit( UInt8 inByte)
{
// return 0 if input is 0
if( inByte == 0)
return inByte;
// start at the top and work down.
UInt8 mask = 0x80;
for( int i = 7; i >0; i--)
{
// if it masks, return.
if( mask & inByte )
{
return mask;
}
// shift one right and try again.
mask >>= 1;
}
// bit zero is the winner.
return 0x01;
}
/*****************************************************************************
** Function bitSigToNumeric
** This function converts a bit-significant value into an integer which
** corresponds to the highest-order bit which is active. For example,
** 0x0035 is converted to 5, which is the bit-number of the high bit of 0x0035.
** Input variable binary = zero is technically illegal; the routine does not check
** explicitly for this value, but rather returns 0xFFFF as a result of no
** bit being found, and the return value is decemented below zero. The
** loop terminates when i becomes zero because of binary = 0.
** Implicit maximum value of binary: 0x00FF.
**
** Explicit Inputs:
** binary - a non-zero binary number (0 has no corresponding bit number)
** Return Value:
** integer - the bit-number of the highest bit active in binary.
**
******************************************************************************/
UInt8
IOATADevConfig::bitSigToNumeric(UInt16 binary)
{
UInt16 i, integer;
/* Test all bits from left to right, terminating at the first non-zero bit. */
for (i = 0x0080, integer = 7; ((i & binary) == 0 && i != 0) ; i >>= 1, integer-- )
{;}
return (integer);
} /* end BitSigToNumeric() */
bool
IOATADevConfig::sDriveSupports48BitLBA( const UInt16* identifyData )
{
if( (identifyData[83] & 0x0400)
&& (identifyData[86] & 0x0400))
{
return true;
}
return false;
}
UInt32
IOATADevConfig::sDriveExtendedLBASize( UInt32* lbaHi, UInt32* lbaLo, const UInt16* identifyData)
{
UInt32 lowerLBA = 0;
UInt32 upperLBA = 0;
if( IOATADevConfig::sDriveSupports48BitLBA( identifyData ) )
{
lowerLBA = identifyData[ 100 ] | ( identifyData[101] << 16 );
upperLBA = identifyData[102] | ( identifyData[103] << 16 );
}
*lbaLo = lowerLBA;
*lbaHi = upperLBA;
return lowerLBA;
}