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Fix the reset sequence in AtapiFindDevices to work correctly in VMware.

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svn path=/trunk/; revision=10813
This commit is contained in:
Filip Navara 2004-09-10 23:17:45 +00:00
parent fb16e656c4
commit 9a4721af9c
1 changed files with 77 additions and 43 deletions
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100
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 1.51 2004/09/03 04:44:45 navaraf Exp $
/* $Id: atapi.c,v 1.52 2004/09/10 23:17:45 navaraf Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS ATAPI miniport driver
@ -56,7 +56,7 @@
#include "atapi.h"
#define NDEBUG
//#define NDEBUG
#include <debug.h>
#define VERSION "0.0.1"
@ -294,7 +294,10 @@ AtapiErrorToScsi(PVOID DeviceExtension,
PSCSI_REQUEST_BLOCK Srb);
static VOID
AtapiScsiSrbToAtapi (PSCSI_REQUEST_BLOCK Srb);
AtapiScsiSrbToAtapi(PSCSI_REQUEST_BLOCK Srb);
static BOOLEAN
AtapiWaitForStatus(ULONG CommandPort, ULONG Mask, ULONG Value, ULONG Timeout);
// ---------------------------------------------------------------- Inlines
@ -1094,9 +1097,10 @@ AtapiFindDevices(PATAPI_MINIPORT_EXTENSION DeviceExtension,
ULONG CommandPortBase;
ULONG ControlPortBase;
ULONG UnitNumber;
ULONG Retries;
ULONG Status;
UCHAR High;
UCHAR Low;
BOOL UnitPresent[2];
DPRINT("AtapiFindDevices() called\n");
@ -1109,52 +1113,66 @@ AtapiFindDevices(PATAPI_MINIPORT_EXTENSION DeviceExtension,
for (UnitNumber = 0; UnitNumber < 2; UnitNumber++)
{
/* Select drive */
IDEWriteDriveHead(CommandPortBase,
IDE_DH_FIXED | (UnitNumber ? IDE_DH_DRV1 : 0));
IDEWriteDriveControl(ControlPortBase, 0);
IDEWriteDriveHead(CommandPortBase, IDE_DH_FIXED |
(UnitNumber ? IDE_DH_DRV1 : IDE_DH_DRV0));
ScsiPortStallExecution(500);
/* Disable interrupts */
IDEWriteDriveControl(ControlPortBase,
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);
UnitPresent[UnitNumber] = (Low == 0x55 || High == 0xaa);
#ifndef NDEBUG
if (Low != 0x55 || High != 0xaa)
{
DPRINT("No Drive found. UnitNumber %d CommandPortBase %x\n", UnitNumber, CommandPortBase);
continue;
}
#endif
}
/* Check if any unit was found. */
if (UnitPresent[0] == FALSE && UnitPresent[1] == FALSE)
{
DPRINT("No device found\n");
return FALSE;
}
/* Soft reset */
IDEWriteDriveControl(ControlPortBase, IDE_DC_nIEN | IDE_DC_SRST);
IDEWriteDriveHead(CommandPortBase, IDE_DH_FIXED);
IDEWriteDriveControl(ControlPortBase, IDE_DC_SRST);
ScsiPortStallExecution(500);
IDEWriteDriveControl(ControlPortBase, IDE_DC_nIEN);
ScsiPortStallExecution(500);
ScsiPortStallExecution(200);
for (Retries = 0; Retries < 20000; Retries++)
{
if (!(IDEReadStatus(CommandPortBase) & IDE_SR_BUSY))
{
break;
}
ScsiPortStallExecution(150);
}
if (Retries >= 20000)
/* Wait for busy to clear */
if (!AtapiWaitForStatus(CommandPortBase, IDE_SR_BUSY, 0, 20000))
{
DPRINT("Timeout on drive %lu\n", UnitNumber);
DeviceExtension->DeviceFlags[UnitNumber] &= ~DEVICE_PRESENT;
return FALSE;
}
else
{
Status = IDEReadStatus(DeviceExtension->CommandPortBase);
if (Status & IDE_SR_ERR)
{
DPRINT("Error while doing software reset\n");
return FALSE;
}
}
for (UnitNumber = 0; UnitNumber < 2; UnitNumber++)
{
/* Skip initilization of non-existent units */
if (!UnitPresent[UnitNumber])
{
continue;
}
/* Select drive */
IDEWriteDriveHead(CommandPortBase, IDE_DH_FIXED |
(UnitNumber ? IDE_DH_DRV1 : IDE_DH_DRV0));
High = IDEReadCylinderHigh(CommandPortBase);
Low = IDEReadCylinderLow(CommandPortBase);
@ -1239,9 +1257,6 @@ AtapiFindDevices(PATAPI_MINIPORT_EXTENSION DeviceExtension,
/* 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");
@ -3046,4 +3061,23 @@ AtapiInitDma(PATAPI_MINIPORT_EXTENSION DevExt,
}
#endif
static BOOLEAN
AtapiWaitForStatus( ULONG CommandPort, ULONG Mask, ULONG Value, ULONG Timeout )
{
ULONG RetryCount, Status;
for (RetryCount = 0; RetryCount < Timeout; RetryCount++)
{
Status = IDEReadStatus(CommandPort);
if ((Status & Mask) == Value)
{
return TRUE;
}
ScsiPortStallExecution(10);
}
DPRINT("status=%02x\n", Status);
DPRINT("waited %ld usecs\n", RetryCount * 10);
return FALSE;
}
/* EOF */