2 * ReactOS Floppy Driver
3 * Copyright (C) 2004, Vizzini (vizzini@plasmic.com)
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 * PROJECT: ReactOS Floppy Driver
21 * PURPOSE: Main floppy driver routines
22 * PROGRAMMER: Vizzini (vizzini@plasmic.com)
24 * 15-Feb-2004 vizzini - Created
26 * - This driver is only designed to work with ISA-bus floppy controllers. This
27 * won't work on PCI-based controllers or on anything else with level-sensitive
28 * interrupts without modification. I don't think these controllers exist.
30 * ---- General to-do items ----
31 * TODO: Figure out why CreateClose isn't called any more. Seems to correspond
32 * with the driver not being unloadable.
33 * TODO: Think about StopDpcQueued -- could be a race; too tired atm to tell
34 * TODO: Clean up drive start/stop responsibilities (currently a mess...)
36 * ---- Support for proper media detection ----
37 * TODO: Handle MFM flag
38 * TODO: Un-hardcode the data rate from various places
39 * TODO: Proper media detection (right now we're hardcoded to 1.44)
40 * TODO: Media detection based on sector 1
46 * Global controller info structures. Each controller gets one. Since the system
47 * will probably have only one, with four being a very unlikely maximum, a static
48 * global array is easiest to deal with.
50 static CONTROLLER_INFO gControllerInfo
[MAX_CONTROLLERS
];
51 static ULONG gNumberOfControllers
= 0;
53 /* Queue thread management */
54 static KEVENT QueueThreadTerminate
;
55 static PVOID QueueThreadObject
;
59 MotorStopDpcFunc(PKDPC UnusedDpc
, PVOID DeferredContext
, PVOID SystemArgument1
, PVOID SystemArgument2
)
61 * FUNCTION: Stop the floppy motor
63 * UnusedDpc: DPC object that's going off
64 * DeferredContext: called with DRIVE_INFO for drive to turn off
65 * SystemArgument1: unused
66 * SystemArgument2: unused
68 * - Must set an event to let other threads know we're done turning off the motor
69 * - Called back at DISPATCH_LEVEL
72 PCONTROLLER_INFO ControllerInfo
= (PCONTROLLER_INFO
)DeferredContext
;
74 UNREFERENCED_PARAMETER(SystemArgument1
);
75 UNREFERENCED_PARAMETER(SystemArgument2
);
76 UNREFERENCED_PARAMETER(UnusedDpc
);
78 ASSERT(KeGetCurrentIrql() == DISPATCH_LEVEL
);
79 ASSERT(ControllerInfo
);
81 TRACE_(FLOPPY
, "MotorStopDpcFunc called\n");
83 HwTurnOffMotor(ControllerInfo
);
84 ControllerInfo
->StopDpcQueued
= FALSE
;
85 KeSetEvent(&ControllerInfo
->MotorStoppedEvent
, EVENT_INCREMENT
, FALSE
);
90 StartMotor(PDRIVE_INFO DriveInfo
)
92 * FUNCTION: Start the motor, taking into account proper handling of the timer race
94 * DriveInfo: drive to start
96 * - Never call HwTurnOnMotor() directly
97 * - This protocol manages a race between the cancel timer and the requesting thread.
98 * You wouldn't want to turn on the motor and then cancel the timer, because the
99 * cancel dpc might fire in the meantime, and that'd un-do what you just did. If you
100 * cancel the timer first, but KeCancelTimer returns false, the dpc is already running,
101 * so you have to wait until the dpc is completly done running, or else you'll race
102 * with the turner-offer
103 * - PAGED_CODE because we wait
109 TRACE_(FLOPPY
, "StartMotor called\n");
111 if(DriveInfo
->ControllerInfo
->StopDpcQueued
&& !KeCancelTimer(&DriveInfo
->ControllerInfo
->MotorTimer
))
113 /* Motor turner-offer is already running; wait for it to finish */
114 INFO_(FLOPPY
, "StartMotor: motor turner-offer is already running; waiting for it\n");
115 KeWaitForSingleObject(&DriveInfo
->ControllerInfo
->MotorStoppedEvent
, Executive
, KernelMode
, FALSE
, NULL
);
116 INFO_(FLOPPY
, "StartMotor: wait satisfied\n");
119 DriveInfo
->ControllerInfo
->StopDpcQueued
= FALSE
;
121 if(HwTurnOnMotor(DriveInfo
) != STATUS_SUCCESS
)
123 WARN_(FLOPPY
, "StartMotor(): warning: HwTurnOnMotor failed\n");
129 StopMotor(PCONTROLLER_INFO ControllerInfo
)
131 * FUNCTION: Stop all motors on the controller
133 * DriveInfo: Drive to stop
135 * - Never call HwTurnOffMotor() directly
136 * - This manages the timer cancelation race (see StartMotor for details).
137 * All we have to do is set up a timer.
140 LARGE_INTEGER StopTime
;
142 ASSERT(ControllerInfo
);
144 TRACE_(FLOPPY
, "StopMotor called\n");
146 /* one relative second, in 100-ns units */
147 StopTime
.QuadPart
= 10000000;
148 StopTime
.QuadPart
*= -1;
150 KeClearEvent(&ControllerInfo
->MotorStoppedEvent
);
151 KeSetTimer(&ControllerInfo
->MotorTimer
, StopTime
, &ControllerInfo
->MotorStopDpc
);
152 ControllerInfo
->StopDpcQueued
= TRUE
;
157 WaitForControllerInterrupt(PCONTROLLER_INFO ControllerInfo
)
159 * FUNCTION: Wait for the controller to interrupt, and then clear the event
161 * ControllerInfo: Controller to wait for
163 * - There is a small chance that an unexpected or spurious interrupt could
164 * be lost with this clear/wait/clear scheme used in this driver. This is
165 * deemed to be an acceptable risk due to the unlikeliness of the scenario,
166 * and the fact that it'll probably work fine next time.
167 * - PAGED_CODE because it waits
171 ASSERT(ControllerInfo
);
173 KeWaitForSingleObject(&ControllerInfo
->SynchEvent
, Executive
, KernelMode
, FALSE
, NULL
);
174 KeClearEvent(&ControllerInfo
->SynchEvent
);
177 static DRIVER_DISPATCH CreateClose
;
178 static NTSTATUS NTAPI
CreateClose(PDEVICE_OBJECT DeviceObject
,
181 * FUNCTION: Dispatch function called for Create and Close IRPs
183 * DeviceObject: DeviceObject that is the target of the IRP
184 * Irp: IRP to process
186 * STATUS_SUCCESS in all cases
188 * - The Microsoft sample drivers tend to return FILE_OPENED in Information, so I do too.
189 * - No reason to fail the device open
190 * - No state to track, so this routine is easy
191 * - Can be called <= DISPATCH_LEVEL
193 * TODO: Figure out why this isn't getting called
196 UNREFERENCED_PARAMETER(DeviceObject
);
198 TRACE_(FLOPPY
, "CreateClose called\n");
200 Irp
->IoStatus
.Status
= STATUS_SUCCESS
;
201 Irp
->IoStatus
.Information
= FILE_OPENED
;
203 IoCompleteRequest(Irp
, IO_DISK_INCREMENT
);
205 return STATUS_SUCCESS
;
209 static NTSTATUS NTAPI
210 Recalibrate(PDRIVE_INFO DriveInfo
)
212 * FUNCTION: Start the recalibration process
214 * DriveInfo: Pointer to the driveinfo struct associated with the targeted drive
216 * STATUS_SUCCESS on successful starting of the process
217 * STATUS_IO_DEVICE_ERROR if it fails
219 * - Sometimes you have to do two recalibrations, particularly if the disk has <80 tracks.
220 * - PAGED_CODE because we wait
229 /* first turn on the motor */
230 /* Must stop after every start, prior to return */
231 StartMotor(DriveInfo
);
233 /* set the data rate */
234 WARN_(FLOPPY
, "FIXME: UN-HARDCODE DATA RATE\n");
235 if(HwSetDataRate(DriveInfo
->ControllerInfo
, 0) != STATUS_SUCCESS
)
237 WARN_(FLOPPY
, "Recalibrate: HwSetDataRate failed\n");
238 StopMotor(DriveInfo
->ControllerInfo
);
239 return STATUS_IO_DEVICE_ERROR
;
242 /* clear the event just in case the last call forgot */
243 KeClearEvent(&DriveInfo
->ControllerInfo
->SynchEvent
);
245 /* sometimes you have to do this twice; we'll just do it twice all the time since
246 * we don't know if the people calling this Recalibrate routine expect a disk to
247 * even be in the drive, and if so, if that disk is formatted.
249 for(i
= 0; i
< 2; i
++)
251 /* Send the command */
252 Status
= HwRecalibrate(DriveInfo
);
253 if(Status
!= STATUS_SUCCESS
)
255 WARN_(FLOPPY
, "Recalibrate: HwRecalibrate returned error\n");
259 WaitForControllerInterrupt(DriveInfo
->ControllerInfo
);
261 /* Get the results */
262 Status
= HwRecalibrateResult(DriveInfo
->ControllerInfo
);
263 if(Status
!= STATUS_SUCCESS
)
265 WARN_(FLOPPY
, "Recalibrate: HwRecalibrateResult returned error\n");
270 KeClearEvent(&DriveInfo
->ControllerInfo
->SynchEvent
);
272 /* Must stop after every start, prior to return */
273 StopMotor(DriveInfo
->ControllerInfo
);
280 ResetChangeFlag(PDRIVE_INFO DriveInfo
)
282 * FUNCTION: Reset the drive's change flag (as reflected in the DIR)
284 * DriveInfo: the drive to reset
286 * STATUS_SUCCESS if the changeline is cleared
287 * STATUS_NO_MEDIA_IN_DEVICE if the changeline cannot be cleared
288 * STATUS_IO_DEVICE_ERROR if the controller cannot be communicated with
290 * - Change reset procedure: recalibrate, seek 1, seek 0
291 * - If the line is still set after that, there's clearly no disk in the
292 * drive, so we return STATUS_NO_MEDIA_IN_DEVICE
293 * - PAGED_CODE because we wait
301 TRACE_(FLOPPY
, "ResetChangeFlag called\n");
303 /* Try to recalibrate. We don't care if it works. */
304 Recalibrate(DriveInfo
);
306 /* clear spurious interrupts in prep for seeks */
307 KeClearEvent(&DriveInfo
->ControllerInfo
->SynchEvent
);
309 /* must re-start the drive because Recalibrate() stops it */
310 StartMotor(DriveInfo
);
313 if(HwSeek(DriveInfo
, 1) != STATUS_SUCCESS
)
315 WARN_(FLOPPY
, "ResetChangeFlag(): HwSeek failed; returning STATUS_IO_DEVICE_ERROR\n");
316 StopMotor(DriveInfo
->ControllerInfo
);
317 return STATUS_IO_DEVICE_ERROR
;
320 WaitForControllerInterrupt(DriveInfo
->ControllerInfo
);
322 if(HwSenseInterruptStatus(DriveInfo
->ControllerInfo
) != STATUS_SUCCESS
)
324 WARN_(FLOPPY
, "ResetChangeFlag(): HwSenseInterruptStatus failed; bailing out\n");
325 StopMotor(DriveInfo
->ControllerInfo
);
326 return STATUS_IO_DEVICE_ERROR
;
330 if(HwSeek(DriveInfo
, 0) != STATUS_SUCCESS
)
332 WARN_(FLOPPY
, "ResetChangeFlag(): HwSeek failed; returning STATUS_IO_DEVICE_ERROR\n");
333 StopMotor(DriveInfo
->ControllerInfo
);
334 return STATUS_IO_DEVICE_ERROR
;
337 WaitForControllerInterrupt(DriveInfo
->ControllerInfo
);
339 if(HwSenseInterruptStatus(DriveInfo
->ControllerInfo
) != STATUS_SUCCESS
)
341 WARN_(FLOPPY
, "ResetChangeFlag(): HwSenseInterruptStatus #2 failed; bailing\n");
342 StopMotor(DriveInfo
->ControllerInfo
);
343 return STATUS_IO_DEVICE_ERROR
;
346 /* Check the change bit */
347 if(HwDiskChanged(DriveInfo
, &DiskChanged
) != STATUS_SUCCESS
)
349 WARN_(FLOPPY
, "ResetChangeFlag(): HwDiskChanged failed; returning STATUS_IO_DEVICE_ERROR\n");
350 StopMotor(DriveInfo
->ControllerInfo
);
351 return STATUS_IO_DEVICE_ERROR
;
354 StopMotor(DriveInfo
->ControllerInfo
);
356 /* if the change flag is still set, there's probably no media in the drive. */
358 return STATUS_NO_MEDIA_IN_DEVICE
;
360 /* else we're done! */
361 return STATUS_SUCCESS
;
366 Unload(PDRIVER_OBJECT DriverObject
)
368 * FUNCTION: Unload the driver from memory
370 * DriverObject - The driver that is being unloaded
376 UNREFERENCED_PARAMETER(DriverObject
);
378 TRACE_(FLOPPY
, "unloading\n");
380 KeSetEvent(&QueueThreadTerminate
, 0, FALSE
);
381 KeWaitForSingleObject(QueueThreadObject
, Executive
, KernelMode
, FALSE
, 0);
382 ObDereferenceObject(QueueThreadObject
);
384 for(i
= 0; i
< gNumberOfControllers
; i
++)
386 if(!gControllerInfo
[i
].Initialized
)
389 for(j
= 0; j
< gControllerInfo
[i
].NumberOfDrives
; j
++)
391 if(!gControllerInfo
[i
].DriveInfo
[j
].Initialized
)
394 if(gControllerInfo
[i
].DriveInfo
[j
].DeviceObject
)
398 RtlInitUnicodeString(&Link
, gControllerInfo
[i
].DriveInfo
[j
].SymLinkBuffer
);
399 IoDeleteSymbolicLink(&Link
);
401 RtlInitUnicodeString(&Link
, gControllerInfo
[i
].DriveInfo
[j
].ArcPathBuffer
);
402 IoDeassignArcName(&Link
);
404 IoDeleteDevice(gControllerInfo
[i
].DriveInfo
[j
].DeviceObject
);
408 IoDisconnectInterrupt(gControllerInfo
[i
].InterruptObject
);
410 /* Power down the controller */
411 if(HwPowerOff(&gControllerInfo
[i
]) != STATUS_SUCCESS
)
413 WARN_(FLOPPY
, "unload: warning: HwPowerOff failed\n");
419 static NTSTATUS NTAPI
420 ConfigCallback(PVOID Context
,
421 PUNICODE_STRING PathName
,
422 INTERFACE_TYPE BusType
,
424 PKEY_VALUE_FULL_INFORMATION
*BusInformation
,
425 CONFIGURATION_TYPE ControllerType
,
426 ULONG ControllerNumber
,
427 PKEY_VALUE_FULL_INFORMATION
*ControllerInformation
,
428 CONFIGURATION_TYPE PeripheralType
,
429 ULONG PeripheralNumber
,
430 PKEY_VALUE_FULL_INFORMATION
*PeripheralInformation
)
432 * FUNCTION: Callback to IoQueryDeviceDescription, which tells us about our controllers
436 * BusType: Type of the bus that our controller is on
437 * BusNumber: Number of the bus that our controller is on
438 * BusInformation: Unused
439 * ControllerType: Unused
440 * ControllerNumber: Number of the controller that we're adding
441 * ControllerInformation: Full configuration information for our controller
442 * PeripheralType: Unused
443 * PeripheralNumber: Unused
444 * PeripheralInformation: Full configuration information for each drive on our controller
446 * STATUS_SUCCESS in all cases
448 * - The only documentation I've found about the contents of these structures is
449 * from the various Microsoft floppy samples and from the DDK headers. They're
450 * very vague, though, so I'm only mostly sure that this stuff is correct, as
451 * the MS samples do things completely differently than I have done them. Seems
452 * to work in my VMWare, though.
453 * - Basically, the function gets all of the information (port, dma, irq) about the
454 * controller, and then loops through all of the drives presented in PeripheralInformation.
455 * - Each controller has a CONTROLLER_INFO created for it, and each drive has a DRIVE_INFO.
456 * - Device objects are created for each drive (not controller), as that's the targeted
457 * device in the eyes of the rest of the OS. Each DRIVE_INFO points to a single CONTROLLER_INFO.
458 * - We only support up to four controllers in the whole system, each of which supports up to four
462 PKEY_VALUE_FULL_INFORMATION ControllerFullDescriptor
= ControllerInformation
[IoQueryDeviceConfigurationData
];
463 PCM_FULL_RESOURCE_DESCRIPTOR ControllerResourceDescriptor
= (PCM_FULL_RESOURCE_DESCRIPTOR
)((PCHAR
)ControllerFullDescriptor
+
464 ControllerFullDescriptor
->DataOffset
);
466 PKEY_VALUE_FULL_INFORMATION PeripheralFullDescriptor
= PeripheralInformation
[IoQueryDeviceConfigurationData
];
467 PCM_FULL_RESOURCE_DESCRIPTOR PeripheralResourceDescriptor
= (PCM_FULL_RESOURCE_DESCRIPTOR
)((PCHAR
)PeripheralFullDescriptor
+
468 PeripheralFullDescriptor
->DataOffset
);
470 PCM_PARTIAL_RESOURCE_DESCRIPTOR PartialDescriptor
;
471 PCM_FLOPPY_DEVICE_DATA FloppyDeviceData
;
475 UNREFERENCED_PARAMETER(PeripheralType
);
476 UNREFERENCED_PARAMETER(PeripheralNumber
);
477 UNREFERENCED_PARAMETER(BusInformation
);
478 UNREFERENCED_PARAMETER(Context
);
479 UNREFERENCED_PARAMETER(ControllerType
);
480 UNREFERENCED_PARAMETER(PathName
);
483 TRACE_(FLOPPY
, "ConfigCallback called with ControllerNumber %d\n", ControllerNumber
);
485 gControllerInfo
[gNumberOfControllers
].ControllerNumber
= ControllerNumber
;
486 gControllerInfo
[gNumberOfControllers
].InterfaceType
= BusType
;
487 gControllerInfo
[gNumberOfControllers
].BusNumber
= BusNumber
;
489 /* Get controller interrupt level/vector, dma channel, and port base */
490 for(i
= 0; i
< ControllerResourceDescriptor
->PartialResourceList
.Count
; i
++)
492 KeInitializeEvent(&gControllerInfo
[gNumberOfControllers
].SynchEvent
, NotificationEvent
, FALSE
);
494 PartialDescriptor
= &ControllerResourceDescriptor
->PartialResourceList
.PartialDescriptors
[i
];
496 if(PartialDescriptor
->Type
== CmResourceTypeInterrupt
)
498 gControllerInfo
[gNumberOfControllers
].Level
= PartialDescriptor
->u
.Interrupt
.Level
;
499 gControllerInfo
[gNumberOfControllers
].Vector
= PartialDescriptor
->u
.Interrupt
.Vector
;
501 if(PartialDescriptor
->Flags
& CM_RESOURCE_INTERRUPT_LATCHED
)
502 gControllerInfo
[gNumberOfControllers
].InterruptMode
= Latched
;
504 gControllerInfo
[gNumberOfControllers
].InterruptMode
= LevelSensitive
;
507 else if(PartialDescriptor
->Type
== CmResourceTypePort
)
509 PHYSICAL_ADDRESS TranslatedAddress
;
510 ULONG AddressSpace
= 0x1; /* I/O Port Range */
512 if(!HalTranslateBusAddress(BusType
, BusNumber
, PartialDescriptor
->u
.Port
.Start
, &AddressSpace
, &TranslatedAddress
))
514 WARN_(FLOPPY
, "HalTranslateBusAddress failed; returning\n");
515 return STATUS_IO_DEVICE_ERROR
;
518 if(AddressSpace
== 0)
519 gControllerInfo
[gNumberOfControllers
].BaseAddress
= MmMapIoSpace(TranslatedAddress
, FDC_PORT_BYTES
, MmNonCached
);
521 gControllerInfo
[gNumberOfControllers
].BaseAddress
= (PUCHAR
)(ULONG_PTR
)TranslatedAddress
.QuadPart
;
524 else if(PartialDescriptor
->Type
== CmResourceTypeDma
)
525 gControllerInfo
[gNumberOfControllers
].Dma
= PartialDescriptor
->u
.Dma
.Channel
;
528 /* Start with 0 drives, then go looking */
529 gControllerInfo
[gNumberOfControllers
].NumberOfDrives
= 0;
531 /* learn about drives attached to controller */
532 for(i
= 0; i
< PeripheralResourceDescriptor
->PartialResourceList
.Count
; i
++)
534 PDRIVE_INFO DriveInfo
= &gControllerInfo
[gNumberOfControllers
].DriveInfo
[i
];
536 PartialDescriptor
= &PeripheralResourceDescriptor
->PartialResourceList
.PartialDescriptors
[i
];
538 if(PartialDescriptor
->Type
!= CmResourceTypeDeviceSpecific
)
541 FloppyDeviceData
= (PCM_FLOPPY_DEVICE_DATA
)(PartialDescriptor
+ 1);
543 DriveInfo
->ControllerInfo
= &gControllerInfo
[gNumberOfControllers
];
544 DriveInfo
->UnitNumber
= i
;
546 DriveInfo
->FloppyDeviceData
.MaxDensity
= FloppyDeviceData
->MaxDensity
;
547 DriveInfo
->FloppyDeviceData
.MountDensity
= FloppyDeviceData
->MountDensity
;
548 DriveInfo
->FloppyDeviceData
.StepRateHeadUnloadTime
= FloppyDeviceData
->StepRateHeadUnloadTime
;
549 DriveInfo
->FloppyDeviceData
.HeadLoadTime
= FloppyDeviceData
->HeadLoadTime
;
550 DriveInfo
->FloppyDeviceData
.MotorOffTime
= FloppyDeviceData
->MotorOffTime
;
551 DriveInfo
->FloppyDeviceData
.SectorLengthCode
= FloppyDeviceData
->SectorLengthCode
;
552 DriveInfo
->FloppyDeviceData
.SectorPerTrack
= FloppyDeviceData
->SectorPerTrack
;
553 DriveInfo
->FloppyDeviceData
.ReadWriteGapLength
= FloppyDeviceData
->ReadWriteGapLength
;
554 DriveInfo
->FloppyDeviceData
.FormatGapLength
= FloppyDeviceData
->FormatGapLength
;
555 DriveInfo
->FloppyDeviceData
.FormatFillCharacter
= FloppyDeviceData
->FormatFillCharacter
;
556 DriveInfo
->FloppyDeviceData
.HeadSettleTime
= FloppyDeviceData
->HeadSettleTime
;
557 DriveInfo
->FloppyDeviceData
.MotorSettleTime
= FloppyDeviceData
->MotorSettleTime
;
558 DriveInfo
->FloppyDeviceData
.MaximumTrackValue
= FloppyDeviceData
->MaximumTrackValue
;
559 DriveInfo
->FloppyDeviceData
.DataTransferLength
= FloppyDeviceData
->DataTransferLength
;
561 /* Once it's all set up, acknowledge its existance in the controller info object */
562 gControllerInfo
[gNumberOfControllers
].NumberOfDrives
++;
565 gControllerInfo
[gNumberOfControllers
].Populated
= TRUE
;
566 gNumberOfControllers
++;
568 return STATUS_SUCCESS
;
573 Isr(PKINTERRUPT Interrupt
, PVOID ServiceContext
)
575 * FUNCTION: Interrupt service routine for the controllers
577 * Interrupt: Interrupt object representing the interrupt that occured
578 * ServiceContext: Pointer to the ControllerInfo object that caused the interrupt
580 * TRUE in all cases (see notes)
582 * - We should always be the target of the interrupt, being an edge-triggered ISA interrupt, but
583 * this won't be the case with a level-sensitive system like PCI
584 * - Note that it probably doesn't matter if the interrupt isn't dismissed, as it's edge-triggered.
585 * It probably won't keep re-interrupting.
586 * - There are two different ways to dismiss a floppy interrupt. If the command has a result phase
587 * (see intel datasheet), you dismiss the interrupt by reading the first data byte. If it does
588 * not, you dismiss the interrupt by doing a Sense Interrupt command. Again, because it's edge-
589 * triggered, this is safe to not do here, as we can just wait for the DPC.
590 * - Either way, we don't want to do this here. The controller shouldn't interrupt again, so we'll
591 * schedule a DPC to take care of it.
592 * - This driver really cannot shrare interrupts, as I don't know how to conclusively say
593 * whether it was our controller that interrupted or not. I just have to assume that any time
594 * my ISR gets called, it was my board that called it. Dumb design, yes, but it goes back to
595 * the semantics of ISA buses. That, and I don't know much about ISA drivers. :-)
596 * UPDATE: The high bit of Status Register A seems to work on non-AT controllers.
600 PCONTROLLER_INFO ControllerInfo
= (PCONTROLLER_INFO
)ServiceContext
;
602 UNREFERENCED_PARAMETER(Interrupt
);
604 ASSERT(ControllerInfo
);
606 TRACE_(FLOPPY
, "ISR called\n");
609 * Due to the stupidity of the drive/controller relationship on the floppy drive, only one device object
610 * can have an active interrupt pending. Due to the nature of these IRPs, though, there will only ever
611 * be one thread expecting an interrupt at a time, and furthermore, Interrupts (outside of spurious ones)
612 * won't ever happen unless a thread is expecting them. Therefore, all we have to do is signal an event
613 * and we're done. Queue a DPC and leave.
615 KeInsertQueueDpc(&ControllerInfo
->Dpc
, NULL
, NULL
);
622 DpcForIsr(PKDPC UnusedDpc
, PVOID Context
, PVOID SystemArgument1
, PVOID SystemArgument2
)
624 * FUNCTION: This DPC gets queued by every ISR. Does the real per-interrupt work.
626 * UnusedDpc: Pointer to the DPC object that represents our function
627 * DeviceObject: Device that this DPC is running for
629 * Context: Pointer to our ControllerInfo struct
631 * - This function just kicks off whatever the SynchEvent is and returns. We depend on
632 * the thing that caused the drive to interrupt to handle the work of clearing the interrupt.
633 * This enables us to get back to PASSIVE_LEVEL and not hog system time on a really stupid,
634 * slow, screwed-up piece of hardare.
635 * - If nothing is waiting for us to set the event, the interrupt is effectively lost and will
636 * never be dismissed. I wonder if this will become a problem.
637 * - Called at DISPATCH_LEVEL
640 PCONTROLLER_INFO ControllerInfo
= (PCONTROLLER_INFO
)Context
;
642 UNREFERENCED_PARAMETER(UnusedDpc
);
643 UNREFERENCED_PARAMETER(SystemArgument1
);
644 UNREFERENCED_PARAMETER(SystemArgument2
);
646 ASSERT(ControllerInfo
);
648 TRACE_(FLOPPY
, "DpcForIsr called\n");
650 KeSetEvent(&ControllerInfo
->SynchEvent
, EVENT_INCREMENT
, FALSE
);
654 static NTSTATUS NTAPI
655 InitController(PCONTROLLER_INFO ControllerInfo
)
657 * FUNCTION: Initialize a newly-found controller
659 * ControllerInfo: pointer to the controller to be initialized
661 * STATUS_SUCCESS if the controller is successfully initialized
662 * STATUS_IO_DEVICE_ERROR otherwise
667 UCHAR HeadUnloadTime
;
669 UCHAR ControllerVersion
;
672 ASSERT(ControllerInfo
);
674 TRACE_(FLOPPY
, "InitController called with Controller 0x%p\n", ControllerInfo
);
676 /* Get controller in a known state */
677 HwConfigure(ControllerInfo
, FALSE
, TRUE
, TRUE
, 0, 0);
679 /* Get the controller version */
680 ControllerVersion
= HwGetVersion(ControllerInfo
);
682 KeClearEvent(&ControllerInfo
->SynchEvent
);
684 /* Reset the controller */
685 if(HwReset(ControllerInfo
) != STATUS_SUCCESS
)
687 WARN_(FLOPPY
, "InitController: unable to reset controller\n");
688 return STATUS_IO_DEVICE_ERROR
;
691 INFO_(FLOPPY
, "InitController: waiting for initial interrupt\n");
693 /* Wait for an interrupt */
694 WaitForControllerInterrupt(ControllerInfo
);
696 /* Reset means you have to clear each of the four interrupts (one per drive) */
697 for(i
= 0; i
< MAX_DRIVES_PER_CONTROLLER
; i
++)
699 INFO_(FLOPPY
, "InitController: Sensing interrupt %d\n", i
);
701 if(HwSenseInterruptStatus(ControllerInfo
) != STATUS_SUCCESS
)
703 WARN_(FLOPPY
, "InitController: Unable to clear interrupt 0x%x\n", i
);
704 return STATUS_IO_DEVICE_ERROR
;
708 INFO_(FLOPPY
, "InitController: done sensing interrupts\n");
710 /* Next, see if we have the right version to do implied seek */
711 if(ControllerVersion
== VERSION_ENHANCED
)
713 /* If so, set that up -- all defaults below except first TRUE for EIS */
714 if(HwConfigure(ControllerInfo
, TRUE
, TRUE
, TRUE
, 0, 0) != STATUS_SUCCESS
)
716 WARN_(FLOPPY
, "InitController: unable to set up implied seek\n");
717 ControllerInfo
->ImpliedSeeks
= FALSE
;
721 INFO_(FLOPPY
, "InitController: implied seeks set!\n");
722 ControllerInfo
->ImpliedSeeks
= TRUE
;
726 * FIXME: Figure out the answer to the below
728 * I must admit that I'm really confused about the Model 30 issue. At least one
729 * important bit (the disk change bit in the DIR) is flipped if this is a Model 30
730 * controller. However, at least one other floppy driver believes that there are only
731 * two computers that are guaranteed to have a Model 30 controller:
735 * ...and another driver only lists a config option for "thinkpad", that flips
736 * the change line. A third driver doesn't mention the Model 30 issue at all.
738 * What I can't tell is whether or not the average, run-of-the-mill computer now has
739 * a Model 30 controller. For the time being, I'm going to wire this to FALSE,
740 * and just not support the computers mentioned above, while I try to figure out
741 * how ubiquitous these newfangled 30 thingies are.
743 //ControllerInfo->Model30 = TRUE;
744 ControllerInfo
->Model30
= FALSE
;
748 INFO_(FLOPPY
, "InitController: enhanced version not supported; disabling implied seeks\n");
749 ControllerInfo
->ImpliedSeeks
= FALSE
;
750 ControllerInfo
->Model30
= FALSE
;
754 WARN_(FLOPPY
, "FIXME: Figure out speed\n");
755 HeadLoadTime
= SPECIFY_HLT_500K
;
756 HeadUnloadTime
= SPECIFY_HUT_500K
;
757 StepRateTime
= SPECIFY_SRT_500K
;
759 INFO_(FLOPPY
, "InitController: setting data rate\n");
762 if(HwSetDataRate(ControllerInfo
, DRSR_DSEL_500KBPS
) != STATUS_SUCCESS
)
764 WARN_(FLOPPY
, "InitController: unable to set data rate\n");
765 return STATUS_IO_DEVICE_ERROR
;
768 INFO_(FLOPPY
, "InitController: issuing specify command to controller\n");
770 /* Don't disable DMA --> enable dma (dumb & confusing) */
771 if(HwSpecify(ControllerInfo
, HeadLoadTime
, HeadUnloadTime
, StepRateTime
, FALSE
) != STATUS_SUCCESS
)
773 WARN_(FLOPPY
, "InitController: unable to specify options\n");
774 return STATUS_IO_DEVICE_ERROR
;
777 /* Init the stop stuff */
778 KeInitializeDpc(&ControllerInfo
->MotorStopDpc
, MotorStopDpcFunc
, ControllerInfo
);
779 KeInitializeTimer(&ControllerInfo
->MotorTimer
);
780 KeInitializeEvent(&ControllerInfo
->MotorStoppedEvent
, NotificationEvent
, FALSE
);
781 ControllerInfo
->StopDpcQueued
= FALSE
;
784 * Recalibrate each drive on the controller (depends on StartMotor, which depends on the timer stuff above)
785 * We don't even know if there is a disk in the drive, so this may not work, but that's OK.
787 for(i
= 0; i
< ControllerInfo
->NumberOfDrives
; i
++)
789 INFO_(FLOPPY
, "InitController: recalibrating drive 0x%x on controller 0x%p\n", i
, ControllerInfo
);
790 Recalibrate(&ControllerInfo
->DriveInfo
[i
]);
793 INFO_(FLOPPY
, "InitController: done initializing; returning STATUS_SUCCESS\n");
795 return STATUS_SUCCESS
;
800 AddControllers(PDRIVER_OBJECT DriverObject
)
802 * FUNCTION: Called on initialization to find our controllers and build device and controller objects for them
804 * DriverObject: Our driver's DriverObject (so we can create devices against it)
806 * FALSE if we can't allocate a device, adapter, or interrupt object, or if we fail to find any controllers
807 * TRUE otherwise (i.e. we have at least one fully-configured controller)
809 * - Currently we only support ISA buses.
810 * - BUG: Windows 2000 seems to clobber the response from the IoQueryDeviceDescription callback, so now we
811 * just test a boolean value in the first object to see if it was completely populated. The same value
812 * is tested for each controller before we build device objects for it.
814 * - Report resource usage to the HAL
817 INTERFACE_TYPE InterfaceType
= Isa
;
818 CONFIGURATION_TYPE ControllerType
= DiskController
;
819 CONFIGURATION_TYPE PeripheralType
= FloppyDiskPeripheral
;
821 DEVICE_DESCRIPTION DeviceDescription
;
827 /* Find our controllers on all ISA buses */
828 IoQueryDeviceDescription(&InterfaceType
, 0, &ControllerType
, 0, &PeripheralType
, 0, ConfigCallback
, 0);
831 * w2k breaks the return val from ConfigCallback, so we have to hack around it, rather than just
832 * looking for a return value from ConfigCallback. We expect at least one controller.
834 if(!gControllerInfo
[0].Populated
)
836 WARN_(FLOPPY
, "AddControllers: failed to get controller info from registry\n");
840 /* Now that we have a controller, set it up with the system */
841 for(i
= 0; i
< gNumberOfControllers
&& gControllerInfo
[i
].NumberOfDrives
> 0; i
++)
843 /* 0: Report resource usage to the kernel, to make sure they aren't assigned to anyone else */
844 /* FIXME: Implement me. */
846 /* 1: Set up interrupt */
847 gControllerInfo
[i
].MappedVector
= HalGetInterruptVector(gControllerInfo
[i
].InterfaceType
, gControllerInfo
[i
].BusNumber
,
848 gControllerInfo
[i
].Level
, gControllerInfo
[i
].Vector
,
849 &gControllerInfo
[i
].MappedLevel
, &Affinity
);
851 /* Must set up the DPC before we connect the interrupt */
852 KeInitializeDpc(&gControllerInfo
[i
].Dpc
, DpcForIsr
, &gControllerInfo
[i
]);
854 INFO_(FLOPPY
, "Connecting interrupt %d to controller%d (object 0x%p)\n", gControllerInfo
[i
].MappedVector
,
855 i
, &gControllerInfo
[i
]);
857 /* NOTE: We cannot share our interrupt, even on level-triggered buses. See Isr() for details. */
858 if(IoConnectInterrupt(&gControllerInfo
[i
].InterruptObject
, Isr
, &gControllerInfo
[i
], 0, gControllerInfo
[i
].MappedVector
,
859 gControllerInfo
[i
].MappedLevel
, gControllerInfo
[i
].MappedLevel
, gControllerInfo
[i
].InterruptMode
,
860 FALSE
, Affinity
, 0) != STATUS_SUCCESS
)
862 WARN_(FLOPPY
, "AddControllers: unable to connect interrupt\n");
867 memset(&DeviceDescription
, 0, sizeof(DeviceDescription
));
868 DeviceDescription
.Version
= DEVICE_DESCRIPTION_VERSION
;
869 DeviceDescription
.DmaChannel
= gControllerInfo
[i
].Dma
;
870 DeviceDescription
.InterfaceType
= gControllerInfo
[i
].InterfaceType
;
871 DeviceDescription
.BusNumber
= gControllerInfo
[i
].BusNumber
;
872 DeviceDescription
.MaximumLength
= 2*18*512; /* based on a 1.44MB floppy */
874 /* DMA 0,1,2,3 are 8-bit; 4,5,6,7 are 16-bit (4 is chain i think) */
875 DeviceDescription
.DmaWidth
= gControllerInfo
[i
].Dma
> 3 ? Width16Bits
: Width8Bits
;
877 gControllerInfo
[i
].AdapterObject
= HalGetAdapter(&DeviceDescription
, &gControllerInfo
[i
].MapRegisters
);
879 if(!gControllerInfo
[i
].AdapterObject
)
881 WARN_(FLOPPY
, "AddControllers: unable to allocate an adapter object\n");
882 IoDisconnectInterrupt(gControllerInfo
[i
].InterruptObject
);
886 /* 2b: Initialize the new controller */
887 if(InitController(&gControllerInfo
[i
]) != STATUS_SUCCESS
)
889 WARN_(FLOPPY
, "AddControllers(): Unable to set up controller %d - initialization failed\n", i
);
890 IoDisconnectInterrupt(gControllerInfo
[i
].InterruptObject
);
894 /* 2c: Set the controller's initlized flag so we know to release stuff in Unload */
895 gControllerInfo
[i
].Initialized
= TRUE
;
897 /* 3: per-drive setup */
898 for(j
= 0; j
< gControllerInfo
[i
].NumberOfDrives
; j
++)
900 WCHAR DeviceNameBuf
[MAX_DEVICE_NAME
];
901 UNICODE_STRING DeviceName
;
902 UNICODE_STRING LinkName
;
903 UNICODE_STRING ArcPath
;
906 INFO_(FLOPPY
, "AddControllers(): Configuring drive %d on controller %d\n", i
, j
);
909 * 3a: create a device object for the drive
910 * Controllers and drives are 0-based, so the combos are:
922 DriveNumber
= (UCHAR
)(i
*4 + j
); /* loss of precision is OK; there are only 16 of 'em */
924 RtlZeroMemory(&DeviceNameBuf
, MAX_DEVICE_NAME
* sizeof(WCHAR
));
925 swprintf(DeviceNameBuf
, L
"\\Device\\Floppy%d", DriveNumber
);
926 RtlInitUnicodeString(&DeviceName
, DeviceNameBuf
);
928 if(IoCreateDevice(DriverObject
, sizeof(PVOID
), &DeviceName
,
929 FILE_DEVICE_DISK
, FILE_REMOVABLE_MEDIA
| FILE_FLOPPY_DISKETTE
, FALSE
,
930 &gControllerInfo
[i
].DriveInfo
[j
].DeviceObject
) != STATUS_SUCCESS
)
932 WARN_(FLOPPY
, "AddControllers: unable to register a Device object\n");
933 IoDisconnectInterrupt(gControllerInfo
[i
].InterruptObject
);
934 continue; /* continue on to next drive */
937 INFO_(FLOPPY
, "AddControllers: New device: %S (0x%p)\n", DeviceNameBuf
, gControllerInfo
[i
].DriveInfo
[j
].DeviceObject
);
939 /* 3b.5: Create an ARC path in case we're booting from this drive */
940 swprintf(gControllerInfo
[i
].DriveInfo
[j
].ArcPathBuffer
,
941 L
"\\ArcName\\multi(%d)disk(%d)fdisk(%d)", gControllerInfo
[i
].BusNumber
, i
, DriveNumber
);
943 RtlInitUnicodeString(&ArcPath
, gControllerInfo
[i
].DriveInfo
[j
].ArcPathBuffer
);
944 IoAssignArcName(&ArcPath
, &DeviceName
);
946 /* 3c: Set flags up */
947 gControllerInfo
[i
].DriveInfo
[j
].DeviceObject
->Flags
|= DO_DIRECT_IO
;
949 /* 3d: Create a symlink */
950 swprintf(gControllerInfo
[i
].DriveInfo
[j
].SymLinkBuffer
, L
"\\DosDevices\\%c:", DriveNumber
+ 'A');
951 RtlInitUnicodeString(&LinkName
, gControllerInfo
[i
].DriveInfo
[j
].SymLinkBuffer
);
952 if(IoCreateSymbolicLink(&LinkName
, &DeviceName
) != STATUS_SUCCESS
)
954 WARN_(FLOPPY
, "AddControllers: Unable to create a symlink for drive %d\n", DriveNumber
);
955 IoDisconnectInterrupt(gControllerInfo
[i
].InterruptObject
);
956 IoDeassignArcName(&ArcPath
);
957 continue; /* continue to next drive */
960 /* 3e: Increase global floppy drives count */
961 IoGetConfigurationInformation()->FloppyCount
++;
963 /* 3f: Set up the DPC */
964 IoInitializeDpcRequest(gControllerInfo
[i
].DriveInfo
[j
].DeviceObject
, (PIO_DPC_ROUTINE
)DpcForIsr
);
966 /* 3g: Point the device extension at our DriveInfo struct */
967 gControllerInfo
[i
].DriveInfo
[j
].DeviceObject
->DeviceExtension
= &gControllerInfo
[i
].DriveInfo
[j
];
969 /* 3h: neat comic strip */
971 /* 3i: set the initial media type to unknown */
972 memset(&gControllerInfo
[i
].DriveInfo
[j
].DiskGeometry
, 0, sizeof(DISK_GEOMETRY
));
973 gControllerInfo
[i
].DriveInfo
[j
].DiskGeometry
.MediaType
= Unknown
;
975 /* 3j: Now that we're done, set the Initialized flag so we know to free this in Unload */
976 gControllerInfo
[i
].DriveInfo
[j
].Initialized
= TRUE
;
978 /* 3k: Clear the DO_DEVICE_INITIALIZING flag */
979 gControllerInfo
[i
].DriveInfo
[j
].DeviceObject
->Flags
&= ~DO_DEVICE_INITIALIZING
;
983 INFO_(FLOPPY
, "AddControllers: --------------------------------------------> finished adding controllers\n");
985 return (IoGetConfigurationInformation()->FloppyCount
!= 0);
990 SignalMediaChanged(PDEVICE_OBJECT DeviceObject
, PIRP Irp
)
992 * FUNCTION: Process an IRP when the media has changed, and possibly notify the user
994 * DeviceObject: DeviceObject associated with the IRP
995 * Irp: IRP that we're failing due to change
997 * - This procedure is documented in the DDK by "Notifying the File System of Possible Media Changes",
998 * "IoSetHardErrorOrVerifyDevice", and by "Responding to Check-Verify Requests from the File System".
999 * - Callable at <= DISPATCH_LEVEL
1002 PDRIVE_INFO DriveInfo
= DeviceObject
->DeviceExtension
;
1004 TRACE_(FLOPPY
, "SignalMediaChanged called\n");
1006 DriveInfo
->DiskChangeCount
++;
1008 /* If volume is not mounted, do NOT set verify and return STATUS_IO_DEVICE_ERROR */
1009 if(!(DeviceObject
->Vpb
->Flags
& VPB_MOUNTED
))
1011 Irp
->IoStatus
.Status
= STATUS_IO_DEVICE_ERROR
;
1012 Irp
->IoStatus
.Information
= 0;
1016 /* Notify the filesystem that it will need to verify the volume */
1017 DeviceObject
->Flags
|= DO_VERIFY_VOLUME
;
1018 Irp
->IoStatus
.Status
= STATUS_VERIFY_REQUIRED
;
1019 Irp
->IoStatus
.Information
= 0;
1022 * If this is a user-based, threaded request, let the IO manager know to pop up a box asking
1023 * the user to supply the correct media, but only if the error (which we just picked out above)
1024 * is deemed by the IO manager to be "user induced". The reason we don't just unconditionally
1025 * call IoSetHardError... is because MS might change the definition of "user induced" some day,
1026 * and we don't want to have to remember to re-code this.
1028 if(Irp
->Tail
.Overlay
.Thread
&& IoIsErrorUserInduced(Irp
->IoStatus
.Status
))
1029 IoSetHardErrorOrVerifyDevice(Irp
, DeviceObject
);
1034 QueueThread(PVOID Context
)
1036 * FUNCTION: Thread that manages the queue and dispatches any queued requests
1042 PIO_STACK_LOCATION Stack
;
1043 PDEVICE_OBJECT DeviceObject
;
1047 UNREFERENCED_PARAMETER(Context
);
1049 Objects
[0] = &QueueSemaphore
;
1050 Objects
[1] = &QueueThreadTerminate
;
1054 KeWaitForMultipleObjects(2, Objects
, WaitAny
, Executive
, KernelMode
, FALSE
, NULL
, NULL
);
1056 if(KeReadStateEvent(&QueueThreadTerminate
))
1058 INFO_(FLOPPY
, "QueueThread terminating\n");
1062 INFO_(FLOPPY
, "QueueThread: servicing an IRP\n");
1064 Irp
= IoCsqRemoveNextIrp(&Csq
, 0);
1066 /* we won't get an irp if it was canceled */
1069 INFO_(FLOPPY
, "QueueThread: IRP queue empty\n");
1073 DeviceObject
= (PDEVICE_OBJECT
)Irp
->Tail
.Overlay
.DriverContext
[0];
1075 ASSERT(DeviceObject
);
1077 Stack
= IoGetCurrentIrpStackLocation(Irp
);
1079 /* Decide what to do with the IRP */
1080 switch(Stack
->MajorFunction
)
1084 ReadWritePassive(DeviceObject
->DeviceExtension
, Irp
);
1087 case IRP_MJ_DEVICE_CONTROL
:
1088 DeviceIoctlPassive(DeviceObject
->DeviceExtension
, Irp
);
1092 WARN_(FLOPPY
, "QueueThread(): Unrecognized irp: mj: 0x%x\n", Stack
->MajorFunction
);
1093 Irp
->IoStatus
.Status
= STATUS_NOT_SUPPORTED
;
1094 Irp
->IoStatus
.Information
= 0;
1095 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
1102 DriverEntry(PDRIVER_OBJECT DriverObject
, PUNICODE_STRING RegistryPath
)
1104 * FUNCTION: Entry-point for the driver
1106 * DriverObject: Our driver object
1107 * RegistryPath: Unused
1109 * STATUS_SUCCESS on successful initialization of at least one drive
1110 * STATUS_NO_SUCH_DEVICE if we didn't find even one drive
1111 * STATUS_UNSUCCESSFUL otherwise
1114 HANDLE ThreadHandle
;
1116 UNREFERENCED_PARAMETER(RegistryPath
);
1119 * Set up dispatch routines
1121 DriverObject
->MajorFunction
[IRP_MJ_CREATE
] = (PDRIVER_DISPATCH
)CreateClose
;
1122 DriverObject
->MajorFunction
[IRP_MJ_CLOSE
] = (PDRIVER_DISPATCH
)CreateClose
;
1123 DriverObject
->MajorFunction
[IRP_MJ_READ
] = (PDRIVER_DISPATCH
)ReadWrite
;
1124 DriverObject
->MajorFunction
[IRP_MJ_WRITE
] = (PDRIVER_DISPATCH
)ReadWrite
;
1125 DriverObject
->MajorFunction
[IRP_MJ_DEVICE_CONTROL
] = (PDRIVER_DISPATCH
)DeviceIoctl
;
1127 DriverObject
->DriverUnload
= Unload
;
1130 * We depend on some zeroes in these structures. I know this is supposed to be
1131 * initialized to 0 by the complier but this makes me feel beter.
1133 memset(&gControllerInfo
, 0, sizeof(gControllerInfo
));
1136 * Set up queue. This routine cannot fail (trust me, I wrote it).
1138 IoCsqInitialize(&Csq
, CsqInsertIrp
, CsqRemoveIrp
, CsqPeekNextIrp
,
1139 CsqAcquireLock
, CsqReleaseLock
, CsqCompleteCanceledIrp
);
1144 KeInitializeSpinLock(&IrpQueueLock
);
1147 * ...and the queue list itself
1149 InitializeListHead(&IrpQueue
);
1152 * The queue is counted by a semaphore. The queue management thread
1153 * blocks on this semaphore, so if requests come in faster than the queue
1154 * thread can handle them, the semaphore count goes up.
1156 KeInitializeSemaphore(&QueueSemaphore
, 0, 0x7fffffff);
1159 * Event to terminate that thread
1161 KeInitializeEvent(&QueueThreadTerminate
, NotificationEvent
, FALSE
);
1164 * Create the queue processing thread. Save its handle in the global variable
1165 * ThreadHandle so we can wait on its termination during Unload.
1167 if(PsCreateSystemThread(&ThreadHandle
, THREAD_ALL_ACCESS
, 0, 0, 0, QueueThread
, 0) != STATUS_SUCCESS
)
1169 WARN_(FLOPPY
, "Unable to create system thread; failing init\n");
1170 return STATUS_INSUFFICIENT_RESOURCES
;
1173 if(ObReferenceObjectByHandle(ThreadHandle
, STANDARD_RIGHTS_ALL
, PsThreadType
, KernelMode
, &QueueThreadObject
, NULL
) != STATUS_SUCCESS
)
1175 WARN_(FLOPPY
, "Unable to reference returned thread handle; failing init\n");
1176 return STATUS_UNSUCCESSFUL
;
1180 * Close the handle, now that we have the object pointer and a reference of our own.
1181 * The handle will certainly not be valid in the context of the caller next time we
1182 * need it, as handles are process-specific.
1184 ZwClose(ThreadHandle
);
1187 * Start the device discovery proces. Returns STATUS_SUCCESS if
1188 * it finds even one drive attached to one controller.
1190 if(!AddControllers(DriverObject
))
1191 return STATUS_NO_SUCH_DEVICE
;
1193 return STATUS_SUCCESS
;