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-Using DataBuffer and DataTransferLength from DeviceExtension on read/write requests.

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-Check if there is a device attached to the ide channel in AtapiFindDevice.

svn path=/trunk/; revision=4080
This commit is contained in:
Hartmut Birr 2003-01-28 17:34:20 +00:00
parent 596dfc3682
commit 40e995eed2
1 changed files with 55 additions and 28 deletions
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83
reactos/drivers/storage/atapi/atapi.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: atapi.c,v 1.35 2002/12/22 11:38:41 gvg Exp $
/* $Id: atapi.c,v 1.36 2003/01/28 17:34:20 hbirr Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS ATAPI miniport driver
@ -89,7 +89,8 @@ typedef struct _ATAPI_MINIPORT_EXTENSION
PSCSI_REQUEST_BLOCK CurrentSrb;
PUSHORT DataBuffer;
PUCHAR DataBuffer;
ULONG DataTransferLength;
} ATAPI_MINIPORT_EXTENSION, *PATAPI_MINIPORT_EXTENSION;
@ -933,7 +934,7 @@ AtapiInterrupt(IN PVOID DeviceExtension)
DPRINT("Read data\n");
/* Update controller/device state variables */
TargetAddress = Srb->DataBuffer;
TargetAddress = DevExt->DataBuffer;
if (IsAtapi)
{
@ -948,21 +949,21 @@ AtapiInterrupt(IN PVOID DeviceExtension)
DPRINT("TransferLength: %lu\n", Srb->DataTransferLength);
DPRINT("TransferSize: %lu\n", TransferSize);
if (Srb->DataTransferLength <= TransferSize)
if (DevExt->DataTransferLength <= TransferSize)
{
if (!IsAtapi)
{
TransferSize = Srb->DataTransferLength;
TransferSize = DevExt->DataTransferLength;
}
Srb->DataTransferLength = 0;
DevExt->DataTransferLength = 0;
IsLastBlock = TRUE;
}
else
{
Srb->DataTransferLength -= TransferSize;
DevExt->DataTransferLength -= TransferSize;
IsLastBlock = FALSE;
}
Srb->DataBuffer += TransferSize;
DevExt->DataBuffer += TransferSize;
DPRINT("IsLastBlock == %s\n", (IsLastBlock) ? "TRUE" : "FALSE");
/* Wait for DRQ assertion */
@ -1010,7 +1011,7 @@ AtapiInterrupt(IN PVOID DeviceExtension)
{
DPRINT("Write data\n");
if (Srb->DataTransferLength == 0)
if (DevExt->DataTransferLength == 0)
{
/* Check for data overrun */
if (DeviceStatus & IDE_SR_DRQ)
@ -1027,16 +1028,16 @@ AtapiInterrupt(IN PVOID DeviceExtension)
}
else
{
/* Update SRB data */
/* Update DevExt data */
TransferSize = DevExt->TransferSize[Srb->TargetId];
if (Srb->DataTransferLength < TransferSize)
if (DevExt->DataTransferLength < TransferSize)
{
TransferSize = Srb->DataTransferLength;
TransferSize = DevExt->DataTransferLength;
}
TargetAddress = Srb->DataBuffer;
Srb->DataBuffer += TransferSize;
Srb->DataTransferLength -= TransferSize;
TargetAddress = DevExt->DataBuffer;
DevExt->DataBuffer += TransferSize;
DevExt->DataTransferLength -= TransferSize;
/* Write the sector */
if (DevExt->DWordIo[Srb->TargetId])
@ -1146,8 +1147,22 @@ AtapiFindDevices(PATAPI_MINIPORT_EXTENSION DeviceExtension,
IDE_DC_nIEN);
ScsiPortStallExecution(500);
/* Check if a device is attached to the interface */
IDEWriteCylinderHigh(CommandPortBase, 0xaa);
IDEWriteCylinderLow(CommandPortBase, 0x55);
High = IDEReadCylinderHigh(CommandPortBase);
Low = IDEReadCylinderLow(CommandPortBase);
IDEWriteCylinderHigh(CommandPortBase, 0);
IDEWriteCylinderLow(CommandPortBase, 0);
if (Low != 0x55 || High != 0xaa)
{
DPRINT("No Drive found. UnitNumber %d CommandPortBase %x\n", UnitNumber, CommandPortBase);
continue;
}
IDEWriteCommand(CommandPortBase, IDE_CMD_RESET);
for (Retries = 0; Retries < 20000; Retries++)
@ -1206,8 +1221,10 @@ AtapiFindDevices(PATAPI_MINIPORT_EXTENSION DeviceExtension,
DeviceExtension->DevicePresent[UnitNumber] = TRUE;
DeviceExtension->DeviceAtapi[UnitNumber] = FALSE;
DeviceExtension->TransferSize[UnitNumber] = DeviceExtension->DeviceParams[UnitNumber].BytesPerSector;
if (DeviceExtension->DeviceParams[UnitNumber].RWMultImplemented & 0x8000 &&
DeviceExtension->DeviceParams[UnitNumber].RWMultImplemented & 0xff)
if ((DeviceExtension->DeviceParams[UnitNumber].RWMultImplemented & 0x8000) &&
(DeviceExtension->DeviceParams[UnitNumber].RWMultImplemented & 0xff) &&
(DeviceExtension->DeviceParams[UnitNumber].RWMultCurrent & 0x100) &&
(DeviceExtension->DeviceParams[UnitNumber].RWMultCurrent & 0xff))
{
DeviceExtension->TransferSize[UnitNumber] *= (DeviceExtension->DeviceParams[UnitNumber].RWMultCurrent & 0xff);
DeviceExtension->MultiSectorCommand[UnitNumber] = TRUE;
@ -1226,6 +1243,14 @@ AtapiFindDevices(PATAPI_MINIPORT_EXTENSION DeviceExtension,
}
}
/* Reset pending interrupts */
IDEReadStatus(CommandPortBase);
/* Reenable interrupts */
IDEWriteDriveControl(ControlPortBase, 0);
ScsiPortStallExecution(500);
/* Return with drive 0 selected */
IDEWriteDriveHead(CommandPortBase, IDE_DH_FIXED);
ScsiPortStallExecution(500);
DPRINT("AtapiFindDrives() done (DeviceFound %s)\n", (DeviceFound) ? "TRUE" : "FALSE");
@ -1663,7 +1688,8 @@ AtapiSendAtapiCommand(IN PATAPI_MINIPORT_EXTENSION DeviceExtension,
Srb));
/* Set pointer to data buffer. */
DeviceExtension->DataBuffer = (PUSHORT)Srb->DataBuffer;
DeviceExtension->DataBuffer = (PUCHAR)Srb->DataBuffer;
DeviceExtension->DataTransferLength = Srb->DataTransferLength;
DeviceExtension->CurrentSrb = Srb;
/* Wait for BUSY to clear */
@ -1710,10 +1736,10 @@ AtapiSendAtapiCommand(IN PATAPI_MINIPORT_EXTENSION DeviceExtension,
}
#endif
if (Srb->DataTransferLength < 0x10000)
if (DeviceExtension->DataTransferLength < 0x10000)
{
ByteCountLow = (UCHAR)(Srb->DataTransferLength & 0xFF);
ByteCountHigh = (UCHAR)(Srb->DataTransferLength >> 8);
ByteCountLow = (UCHAR)(DeviceExtension->DataTransferLength & 0xFF);
ByteCountHigh = (UCHAR)(DeviceExtension->DataTransferLength >> 8);
}
else
{
@ -2085,7 +2111,8 @@ AtapiReadWrite(PATAPI_MINIPORT_EXTENSION DeviceExtension,
}
/* Set pointer to data buffer. */
DeviceExtension->DataBuffer = (PUSHORT)Srb->DataBuffer;
DeviceExtension->DataBuffer = (PUCHAR)Srb->DataBuffer;
DeviceExtension->DataTransferLength = Srb->DataTransferLength;
DeviceExtension->CurrentSrb = Srb;
@ -2216,16 +2243,16 @@ AtapiReadWrite(PATAPI_MINIPORT_EXTENSION DeviceExtension,
#endif
}
/* Update SRB data */
/* Update DeviceExtension data */
TransferSize = DeviceExtension->TransferSize[Srb->TargetId];
if (Srb->DataTransferLength < TransferSize)
if (DeviceExtension->DataTransferLength < TransferSize)
{
TransferSize = Srb->DataTransferLength;
TransferSize = DeviceExtension->DataTransferLength;
}
TargetAddress = Srb->DataBuffer;
Srb->DataBuffer += TransferSize;
Srb->DataTransferLength -= TransferSize;
TargetAddress = DeviceExtension->DataBuffer;
DeviceExtension->DataBuffer += TransferSize;
DeviceExtension->DataTransferLength -= TransferSize;
/* Write data block */
if (DeviceExtension->DWordIo[Srb->TargetId])