2 Implementation of the USB mass storage Bulk-Only Transport protocol,
3 according to USB Mass Storage Class Bulk-Only Transport, Revision 1.0.
5 Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
6 SPDX-License-Identifier: BSD-2-Clause-Patent
13 // Definition of USB BOT Transport Protocol
15 USB_MASS_TRANSPORT mUsbBotTransport
= {
25 Initializes USB BOT protocol.
27 This function initializes the USB mass storage class BOT protocol.
28 It will save its context which is a USB_BOT_PROTOCOL structure
29 in the Context if Context isn't NULL.
31 @param UsbIo The USB I/O Protocol instance
32 @param Context The buffer to save the context to
34 @retval EFI_SUCCESS The device is successfully initialized.
35 @retval EFI_UNSUPPORTED The transport protocol doesn't support the device.
36 @retval Other The USB BOT initialization fails.
41 IN EFI_USB_IO_PROTOCOL
*UsbIo
,
42 OUT VOID
**Context OPTIONAL
45 USB_BOT_PROTOCOL
*UsbBot
;
46 EFI_USB_INTERFACE_DESCRIPTOR
*Interface
;
47 EFI_USB_ENDPOINT_DESCRIPTOR EndPoint
;
52 // Allocate the BOT context for USB_BOT_PROTOCOL and two endpoint descriptors.
54 UsbBot
= AllocateZeroPool (sizeof (USB_BOT_PROTOCOL
) + 2 * sizeof (EFI_USB_ENDPOINT_DESCRIPTOR
));
55 ASSERT (UsbBot
!= NULL
);
57 UsbBot
->UsbIo
= UsbIo
;
60 // Get the interface descriptor and validate that it
61 // is a USB Mass Storage BOT interface.
63 Status
= UsbIo
->UsbGetInterfaceDescriptor (UsbIo
, &UsbBot
->Interface
);
65 if (EFI_ERROR (Status
)) {
69 Interface
= &UsbBot
->Interface
;
71 if (Interface
->InterfaceProtocol
!= USB_MASS_STORE_BOT
) {
72 Status
= EFI_UNSUPPORTED
;
77 // Locate and save the first bulk-in and bulk-out endpoint
79 for (Index
= 0; Index
< Interface
->NumEndpoints
; Index
++) {
80 Status
= UsbIo
->UsbGetEndpointDescriptor (UsbIo
, Index
, &EndPoint
);
82 if (EFI_ERROR (Status
) || !USB_IS_BULK_ENDPOINT (EndPoint
.Attributes
)) {
86 if (USB_IS_IN_ENDPOINT (EndPoint
.EndpointAddress
) &&
87 (UsbBot
->BulkInEndpoint
== NULL
)) {
89 UsbBot
->BulkInEndpoint
= (EFI_USB_ENDPOINT_DESCRIPTOR
*) (UsbBot
+ 1);
90 CopyMem(UsbBot
->BulkInEndpoint
, &EndPoint
, sizeof (EndPoint
));
93 if (USB_IS_OUT_ENDPOINT (EndPoint
.EndpointAddress
) &&
94 (UsbBot
->BulkOutEndpoint
== NULL
)) {
96 UsbBot
->BulkOutEndpoint
= (EFI_USB_ENDPOINT_DESCRIPTOR
*) (UsbBot
+ 1) + 1;
97 CopyMem (UsbBot
->BulkOutEndpoint
, &EndPoint
, sizeof(EndPoint
));
102 // If bulk-in or bulk-out endpoint is not found, report error.
104 if ((UsbBot
->BulkInEndpoint
== NULL
) || (UsbBot
->BulkOutEndpoint
== NULL
)) {
105 Status
= EFI_UNSUPPORTED
;
110 // The USB BOT protocol uses CBWTag to match the CBW and CSW.
112 UsbBot
->CbwTag
= 0x01;
114 if (Context
!= NULL
) {
128 Send the command to the device using Bulk-Out endpoint.
130 This function sends the command to the device using Bulk-Out endpoint.
131 BOT transfer is composed of three phases: Command, Data, and Status.
132 This is the Command phase.
134 @param UsbBot The USB BOT device
135 @param Cmd The command to transfer to device
136 @param CmdLen The length of the command
137 @param DataDir The direction of the data
138 @param TransLen The expected length of the data
139 @param Lun The number of logic unit
141 @retval EFI_SUCCESS The command is sent to the device.
142 @retval EFI_NOT_READY The device return NAK to the transfer
143 @retval Others Failed to send the command to device
148 IN USB_BOT_PROTOCOL
*UsbBot
,
151 IN EFI_USB_DATA_DIRECTION DataDir
,
162 ASSERT ((CmdLen
> 0) && (CmdLen
<= USB_BOT_MAX_CMDLEN
));
165 // Fill in the Command Block Wrapper.
167 Cbw
.Signature
= USB_BOT_CBW_SIGNATURE
;
168 Cbw
.Tag
= UsbBot
->CbwTag
;
169 Cbw
.DataLen
= TransLen
;
170 Cbw
.Flag
= (UINT8
) ((DataDir
== EfiUsbDataIn
) ? BIT7
: 0);
174 ZeroMem (Cbw
.CmdBlock
, USB_BOT_MAX_CMDLEN
);
175 CopyMem (Cbw
.CmdBlock
, Cmd
, CmdLen
);
178 DataLen
= sizeof (USB_BOT_CBW
);
179 Timeout
= USB_BOT_SEND_CBW_TIMEOUT
/ USB_MASS_1_MILLISECOND
;
182 // Use USB I/O Protocol to send the Command Block Wrapper to the device.
184 Status
= UsbBot
->UsbIo
->UsbBulkTransfer (
186 UsbBot
->BulkOutEndpoint
->EndpointAddress
,
192 if (EFI_ERROR (Status
)) {
193 if (USB_IS_ERROR (Result
, EFI_USB_ERR_STALL
) && DataDir
== EfiUsbDataOut
) {
195 // Respond to Bulk-Out endpoint stall with a Reset Recovery,
196 // according to section 5.3.1 of USB Mass Storage Class Bulk-Only Transport Spec, v1.0.
198 UsbBotResetDevice (UsbBot
, FALSE
);
199 } else if (USB_IS_ERROR (Result
, EFI_USB_ERR_NAK
)) {
200 Status
= EFI_NOT_READY
;
209 Transfer the data between the device and host.
211 This function transfers the data between the device and host.
212 BOT transfer is composed of three phases: Command, Data, and Status.
213 This is the Data phase.
215 @param UsbBot The USB BOT device
216 @param DataDir The direction of the data
217 @param Data The buffer to hold data
218 @param TransLen The expected length of the data
219 @param Timeout The time to wait the command to complete
221 @retval EFI_SUCCESS The data is transferred
222 @retval EFI_SUCCESS No data to transfer
223 @retval EFI_NOT_READY The device return NAK to the transfer
224 @retval Others Failed to transfer data
229 IN USB_BOT_PROTOCOL
*UsbBot
,
230 IN EFI_USB_DATA_DIRECTION DataDir
,
232 IN OUT UINTN
*TransLen
,
236 EFI_USB_ENDPOINT_DESCRIPTOR
*Endpoint
;
241 // If no data to transfer, just return EFI_SUCCESS.
243 if ((DataDir
== EfiUsbNoData
) || (*TransLen
== 0)) {
248 // Select the endpoint then issue the transfer
250 if (DataDir
== EfiUsbDataIn
) {
251 Endpoint
= UsbBot
->BulkInEndpoint
;
253 Endpoint
= UsbBot
->BulkOutEndpoint
;
257 Timeout
= Timeout
/ USB_MASS_1_MILLISECOND
;
259 Status
= UsbBot
->UsbIo
->UsbBulkTransfer (
261 Endpoint
->EndpointAddress
,
267 if (EFI_ERROR (Status
)) {
268 if (USB_IS_ERROR (Result
, EFI_USB_ERR_STALL
)) {
269 DEBUG ((DEBUG_INFO
, "UsbBotDataTransfer: (%r)\n", Status
));
270 DEBUG ((DEBUG_INFO
, "UsbBotDataTransfer: DataIn Stall\n"));
271 UsbClearEndpointStall (UsbBot
->UsbIo
, Endpoint
->EndpointAddress
);
272 } else if (USB_IS_ERROR (Result
, EFI_USB_ERR_NAK
)) {
273 Status
= EFI_NOT_READY
;
275 DEBUG ((DEBUG_ERROR
, "UsbBotDataTransfer: (%r)\n", Status
));
277 if(Status
== EFI_TIMEOUT
){
278 UsbBotResetDevice(UsbBot
, FALSE
);
287 Get the command execution status from device.
289 This function gets the command execution status from device.
290 BOT transfer is composed of three phases: Command, Data, and Status.
291 This is the Status phase.
293 This function returns the transfer status of the BOT's CSW status,
294 and returns the high level command execution result in Result. So
295 even if EFI_SUCCESS is returned, the command may still have failed.
297 @param UsbBot The USB BOT device.
298 @param TransLen The expected length of the data.
299 @param CmdStatus The result of the command execution.
301 @retval EFI_SUCCESS Command execute result is retrieved and in the Result.
302 @retval Other Error occurred when trying to get status.
307 IN USB_BOT_PROTOCOL
*UsbBot
,
317 EFI_USB_IO_PROTOCOL
*UsbIo
;
321 *CmdStatus
= USB_BOT_COMMAND_ERROR
;
322 Status
= EFI_DEVICE_ERROR
;
323 Endpoint
= UsbBot
->BulkInEndpoint
->EndpointAddress
;
324 UsbIo
= UsbBot
->UsbIo
;
325 Timeout
= USB_BOT_RECV_CSW_TIMEOUT
/ USB_MASS_1_MILLISECOND
;
327 for (Index
= 0; Index
< USB_BOT_RECV_CSW_RETRY
; Index
++) {
329 // Attempt to the read Command Status Wrapper from bulk in endpoint
331 ZeroMem (&Csw
, sizeof (USB_BOT_CSW
));
333 Len
= sizeof (USB_BOT_CSW
);
334 Status
= UsbIo
->UsbBulkTransfer (
342 if (EFI_ERROR(Status
)) {
343 if (USB_IS_ERROR (Result
, EFI_USB_ERR_STALL
)) {
344 UsbClearEndpointStall (UsbIo
, Endpoint
);
349 if (Csw
.Signature
!= USB_BOT_CSW_SIGNATURE
) {
351 // CSW is invalid, so perform reset recovery
353 Status
= UsbBotResetDevice (UsbBot
, FALSE
);
354 } else if (Csw
.CmdStatus
== USB_BOT_COMMAND_ERROR
) {
356 // Respond phase error also needs reset recovery
358 Status
= UsbBotResetDevice (UsbBot
, FALSE
);
360 *CmdStatus
= Csw
.CmdStatus
;
365 //The tag is increased even if there is an error.
374 Call the USB Mass Storage Class BOT protocol to issue
375 the command/data/status circle to execute the commands.
377 @param Context The context of the BOT protocol, that is,
379 @param Cmd The high level command
380 @param CmdLen The command length
381 @param DataDir The direction of the data transfer
382 @param Data The buffer to hold data
383 @param DataLen The length of the data
384 @param Lun The number of logic unit
385 @param Timeout The time to wait command
386 @param CmdStatus The result of high level command execution
388 @retval EFI_SUCCESS The command is executed successfully.
389 @retval Other Failed to execute command
397 IN EFI_USB_DATA_DIRECTION DataDir
,
402 OUT UINT32
*CmdStatus
405 USB_BOT_PROTOCOL
*UsbBot
;
410 *CmdStatus
= USB_MASS_CMD_FAIL
;
411 UsbBot
= (USB_BOT_PROTOCOL
*) Context
;
414 // Send the command to the device. Return immediately if device
415 // rejects the command.
417 Status
= UsbBotSendCommand (UsbBot
, Cmd
, CmdLen
, DataDir
, DataLen
, Lun
);
418 if (EFI_ERROR (Status
)) {
419 DEBUG ((DEBUG_ERROR
, "UsbBotExecCommand: UsbBotSendCommand (%r)\n", Status
));
424 // Transfer the data. Don't return immediately even data transfer
425 // failed. The host should attempt to receive the CSW no matter
426 // whether it succeeds or fails.
428 TransLen
= (UINTN
) DataLen
;
429 UsbBotDataTransfer (UsbBot
, DataDir
, Data
, &TransLen
, Timeout
);
432 // Get the status, if that succeeds, interpret the result
434 Status
= UsbBotGetStatus (UsbBot
, DataLen
, &Result
);
435 if (EFI_ERROR (Status
)) {
436 DEBUG ((DEBUG_ERROR
, "UsbBotExecCommand: UsbBotGetStatus (%r)\n", Status
));
441 *CmdStatus
= USB_MASS_CMD_SUCCESS
;
449 Reset the USB mass storage device by BOT protocol.
451 @param Context The context of the BOT protocol, that is,
453 @param ExtendedVerification If FALSE, just issue Bulk-Only Mass Storage Reset request.
454 If TRUE, additionally reset parent hub port.
456 @retval EFI_SUCCESS The device is reset.
457 @retval Others Failed to reset the device..
463 IN BOOLEAN ExtendedVerification
466 USB_BOT_PROTOCOL
*UsbBot
;
467 EFI_USB_DEVICE_REQUEST Request
;
472 UsbBot
= (USB_BOT_PROTOCOL
*) Context
;
474 if (ExtendedVerification
) {
476 // If we need to do strictly reset, reset its parent hub port
478 Status
= UsbBot
->UsbIo
->UsbPortReset (UsbBot
->UsbIo
);
479 if (EFI_ERROR (Status
)) {
480 return EFI_DEVICE_ERROR
;
485 // Issue a class specific Bulk-Only Mass Storage Reset request,
486 // according to section 3.1 of USB Mass Storage Class Bulk-Only Transport Spec, v1.0.
488 Request
.RequestType
= 0x21;
489 Request
.Request
= USB_BOT_RESET_REQUEST
;
491 Request
.Index
= UsbBot
->Interface
.InterfaceNumber
;
493 Timeout
= USB_BOT_RESET_DEVICE_TIMEOUT
/ USB_MASS_1_MILLISECOND
;
495 Status
= UsbBot
->UsbIo
->UsbControlTransfer (
505 if (EFI_ERROR (Status
)) {
506 return EFI_DEVICE_ERROR
;
510 // The device shall NAK the host's request until the reset is
511 // complete. We can use this to sync the device and host. For
512 // now just stall 100ms to wait for the device.
514 gBS
->Stall (USB_BOT_RESET_DEVICE_STALL
);
517 // Clear the Bulk-In and Bulk-Out stall condition.
519 UsbClearEndpointStall (UsbBot
->UsbIo
, UsbBot
->BulkInEndpoint
->EndpointAddress
);
520 UsbClearEndpointStall (UsbBot
->UsbIo
, UsbBot
->BulkOutEndpoint
->EndpointAddress
);
527 Get the max LUN (Logical Unit Number) of USB mass storage device.
529 @param Context The context of the BOT protocol, that is, USB_BOT_PROTOCOL
530 @param MaxLun Return pointer to the max number of LUN. (e.g. MaxLun=1 means LUN0 and
533 @retval EFI_SUCCESS Max LUN is got successfully.
534 @retval Others Fail to execute this request.
543 USB_BOT_PROTOCOL
*UsbBot
;
544 EFI_USB_DEVICE_REQUEST Request
;
549 if (Context
== NULL
|| MaxLun
== NULL
) {
550 return EFI_INVALID_PARAMETER
;
553 UsbBot
= (USB_BOT_PROTOCOL
*) Context
;
556 // Issue a class specific Bulk-Only Mass Storage get max lun request.
557 // according to section 3.2 of USB Mass Storage Class Bulk-Only Transport Spec, v1.0.
559 Request
.RequestType
= 0xA1;
560 Request
.Request
= USB_BOT_GETLUN_REQUEST
;
562 Request
.Index
= UsbBot
->Interface
.InterfaceNumber
;
564 Timeout
= USB_BOT_RESET_DEVICE_TIMEOUT
/ USB_MASS_1_MILLISECOND
;
566 Status
= UsbBot
->UsbIo
->UsbControlTransfer (
575 if (EFI_ERROR (Status
) || *MaxLun
> USB_BOT_MAX_LUN
) {
577 // If the Get LUN request returns an error or the MaxLun is larger than
578 // the maximum LUN value (0x0f) supported by the USB Mass Storage Class
579 // Bulk-Only Transport Spec, then set MaxLun to 0.
581 // This improves compatibility with USB FLASH drives that have a single LUN
582 // and either do not return a max LUN value or return an invalid maximum LUN
592 Clean up the resource used by this BOT protocol.
594 @param Context The context of the BOT protocol, that is, USB_BOT_PROTOCOL.
596 @retval EFI_SUCCESS The resource is cleaned up.