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Fixed Mass Storage Host Class driver and Low Level demo not clearing the error condition if an attached device returns a STALL to a GET MAX LUN request (thanks to Martin Luxen).

This commit is contained in:
Dean Camera 2009-12-04 09:08:48 +00:00
parent 478d9dc04f
commit c49bdcb7c9
4 changed files with 20 additions and 4 deletions
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11
Demos/Host/LowLevel/MassStorageHost/Lib/MassStoreCommands.c
View File

@ -287,13 +287,17 @@ uint8_t MassStore_MassStorageReset(void)
/** Issues a Mass Storage class specific request to determine the index of the highest numbered Logical
* Unit in the attached device.
*
* \note Some devices do not support this request, and will STALL it when issued. To get around this,
* on unsupported devices the max LUN index will be reported as zero and no error will be returned
* if the device STALLs the request.
*
* \param[out] MaxLUNIndex Pointer to the location that the maximum LUN index value should be stored
*
* \return A value from the USB_Host_SendControlErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
*/
uint8_t MassStore_GetMaxLUN(uint8_t* const MaxLUNIndex)
{
uint8_t ErrorCode;
uint8_t ErrorCode = HOST_SENDCONTROL_Successful;
USB_ControlRequest = (USB_Request_Header_t)
{
@ -313,7 +317,10 @@ uint8_t MassStore_GetMaxLUN(uint8_t* const MaxLUNIndex)
Pipe_ClearStall();
/* Some faulty Mass Storage devices don't implement the GET_MAX_LUN request, so assume a single LUN */
*MaxLUNIndex = 0;
*MaxLUNIndex = 0;
/* Clear the error, and pretend the request executed correctly if the device STALLed it */
ErrorCode = HOST_SENDCONTROL_Successful;
}
return ErrorCode;

7
LUFA/Drivers/USB/Class/Host/MassStorage.c
View File

@ -305,7 +305,7 @@ uint8_t MS_Host_ResetMSInterface(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo)
uint8_t MS_Host_GetMaxLUN(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo, uint8_t* const MaxLUNIndex)
{
uint8_t ErrorCode;
uint8_t ErrorCode = HOST_SENDCONTROL_Successful;
USB_ControlRequest = (USB_Request_Header_t)
{
@ -319,7 +319,10 @@ uint8_t MS_Host_GetMaxLUN(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo, uint8_
Pipe_SelectPipe(PIPE_CONTROLPIPE);
if ((ErrorCode = USB_Host_SendControlRequest(MaxLUNIndex)) != HOST_SENDCONTROL_Successful)
*MaxLUNIndex = 0;
{
*MaxLUNIndex = 0;
ErrorCode = HOST_SENDCONTROL_Successful;
}
return ErrorCode;
}

4
LUFA/Drivers/USB/Class/Host/MassStorage.h
View File

@ -149,6 +149,10 @@
* UNit, a logical drive) in the device. This value can then be used in the other functions of the Mass Storage
* Host mode Class driver to address a specific LUN within the device.
*
* \note Some devices do not support this request, and will STALL it when issued. To get around this,
* on unsupported devices the max LUN index will be reported as zero and no error will be returned
* if the device STALLs the request.
*
* \param[in,out] MSInterfaceInfo Pointer to a structure containing a MS Class host configuration and state
* \param[out] MaxLUNIndex Pointer to a location where the highest LUN index value should be stored
*

2
LUFA/ManPages/ChangeLog.txt
View File

@ -49,6 +49,8 @@
* - Fixed CDCHost failing on devices with bidirectional endpoints
* - Fixed USB driver failing to define the PLL prescaler mask for the ATMEGA8U2 and ATMEGA16U2
* - Fixed HID Parser not distributing the Usage Min and Usage Max values across an array of report items
* - Fixed Mass Storage Host Class driver and Low Level demo not clearing the error condition if an attached device returns a
* STALL to a GET MAX LUN request (thanks to Martin Luxen)
*
* \section Sec_ChangeLog091122 Version 091122
*