You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
322 lines
10 KiB
322 lines
10 KiB
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2012.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.lufa-lib.org
|
|
*/
|
|
|
|
/*
|
|
Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
|
|
|
Permission to use, copy, modify, distribute, and sell this
|
|
software and its documentation for any purpose is hereby granted
|
|
without fee, provided that the above copyright notice appear in
|
|
all copies and that both that the copyright notice and this
|
|
permission notice and warranty disclaimer appear in supporting
|
|
documentation, and that the name of the author not be used in
|
|
advertising or publicity pertaining to distribution of the
|
|
software without specific, written prior permission.
|
|
|
|
The author disclaims all warranties with regard to this
|
|
software, including all implied warranties of merchantability
|
|
and fitness. In no event shall the author be liable for any
|
|
special, indirect or consequential damages or any damages
|
|
whatsoever resulting from loss of use, data or profits, whether
|
|
in an action of contract, negligence or other tortious action,
|
|
arising out of or in connection with the use or performance of
|
|
this software.
|
|
*/
|
|
|
|
/** \file
|
|
*
|
|
* Main source file for the Mass Storage demo. This file contains the main tasks of the demo and
|
|
* is responsible for the initial application hardware configuration.
|
|
*/
|
|
|
|
#define INCLUDE_FROM_MASSSTORAGE_C
|
|
#include "MassStorage.h"
|
|
|
|
/** Structure to hold the latest Command Block Wrapper issued by the host, containing a SCSI command to execute. */
|
|
MS_CommandBlockWrapper_t CommandBlock;
|
|
|
|
/** Structure to hold the latest Command Status Wrapper to return to the host, containing the status of the last issued command. */
|
|
MS_CommandStatusWrapper_t CommandStatus = { .Signature = MS_CSW_SIGNATURE };
|
|
|
|
/** Flag to asynchronously abort any in-progress data transfers upon the reception of a mass storage reset command. */
|
|
volatile bool IsMassStoreReset = false;
|
|
|
|
|
|
/** Main program entry point. This routine configures the hardware required by the application, then
|
|
* enters a loop to run the application tasks in sequence.
|
|
*/
|
|
int main(void)
|
|
{
|
|
SetupHardware();
|
|
|
|
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
|
|
GlobalInterruptEnable();
|
|
|
|
for (;;)
|
|
{
|
|
MassStorage_Task();
|
|
USB_USBTask();
|
|
}
|
|
}
|
|
|
|
/** Configures the board hardware and chip peripherals for the demo's functionality. */
|
|
void SetupHardware(void)
|
|
{
|
|
/* Disable watchdog if enabled by bootloader/fuses */
|
|
MCUSR &= ~(1 << WDRF);
|
|
wdt_disable();
|
|
|
|
/* Disable clock division */
|
|
clock_prescale_set(clock_div_1);
|
|
|
|
/* Hardware Initialization */
|
|
LEDs_Init();
|
|
SPI_Init(SPI_SPEED_FCPU_DIV_2 | SPI_ORDER_MSB_FIRST | SPI_SCK_LEAD_FALLING | SPI_SAMPLE_TRAILING | SPI_MODE_MASTER);
|
|
Dataflash_Init();
|
|
USB_Init();
|
|
|
|
/* Check if the Dataflash is working, abort if not */
|
|
if (!(DataflashManager_CheckDataflashOperation()))
|
|
{
|
|
LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
|
|
for(;;);
|
|
}
|
|
|
|
/* Clear Dataflash sector protections, if enabled */
|
|
DataflashManager_ResetDataflashProtections();
|
|
}
|
|
|
|
/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */
|
|
void EVENT_USB_Device_Connect(void)
|
|
{
|
|
/* Indicate USB enumerating */
|
|
LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
|
|
|
|
/* Reset the MSReset flag upon connection */
|
|
IsMassStoreReset = false;
|
|
}
|
|
|
|
/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
|
|
* the status LEDs and stops the Mass Storage management task.
|
|
*/
|
|
void EVENT_USB_Device_Disconnect(void)
|
|
{
|
|
/* Indicate USB not ready */
|
|
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
|
|
}
|
|
|
|
/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
|
|
* of the USB device after enumeration - the device endpoints are configured and the Mass Storage management task started.
|
|
*/
|
|
void EVENT_USB_Device_ConfigurationChanged(void)
|
|
{
|
|
bool ConfigSuccess = true;
|
|
|
|
/* Setup Mass Storage Data Endpoints */
|
|
ConfigSuccess &= Endpoint_ConfigureEndpoint(MASS_STORAGE_IN_EPADDR, EP_TYPE_BULK, MASS_STORAGE_IO_EPSIZE, 1);
|
|
ConfigSuccess &= Endpoint_ConfigureEndpoint(MASS_STORAGE_OUT_EPADDR, EP_TYPE_BULK, MASS_STORAGE_IO_EPSIZE, 1);
|
|
|
|
/* Indicate endpoint configuration success or failure */
|
|
LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
|
|
}
|
|
|
|
/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
|
|
* the device from the USB host before passing along unhandled control requests to the library for processing
|
|
* internally.
|
|
*/
|
|
void EVENT_USB_Device_ControlRequest(void)
|
|
{
|
|
/* Process UFI specific control requests */
|
|
switch (USB_ControlRequest.bRequest)
|
|
{
|
|
case MS_REQ_MassStorageReset:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
Endpoint_ClearSETUP();
|
|
Endpoint_ClearStatusStage();
|
|
|
|
/* Indicate that the current transfer should be aborted */
|
|
IsMassStoreReset = true;
|
|
}
|
|
|
|
break;
|
|
case MS_REQ_GetMaxLUN:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
Endpoint_ClearSETUP();
|
|
|
|
/* Indicate to the host the number of supported LUNs (virtual disks) on the device */
|
|
Endpoint_Write_8(TOTAL_LUNS - 1);
|
|
|
|
Endpoint_ClearIN();
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
/** Task to manage the Mass Storage interface, reading in Command Block Wrappers from the host, processing the SCSI commands they
|
|
* contain, and returning Command Status Wrappers back to the host to indicate the success or failure of the last issued command.
|
|
*/
|
|
void MassStorage_Task(void)
|
|
{
|
|
/* Device must be connected and configured for the task to run */
|
|
if (USB_DeviceState != DEVICE_STATE_Configured)
|
|
return;
|
|
|
|
/* Process sent command block from the host if one has been sent */
|
|
if (ReadInCommandBlock())
|
|
{
|
|
/* Indicate busy */
|
|
LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
|
|
|
|
/* Check direction of command, select Data IN endpoint if data is from the device */
|
|
if (CommandBlock.Flags & MS_COMMAND_DIR_DATA_IN)
|
|
Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPADDR);
|
|
|
|
/* Decode the received SCSI command, set returned status code */
|
|
CommandStatus.Status = SCSI_DecodeSCSICommand() ? MS_SCSI_COMMAND_Pass : MS_SCSI_COMMAND_Fail;
|
|
|
|
/* Load in the CBW tag into the CSW to link them together */
|
|
CommandStatus.Tag = CommandBlock.Tag;
|
|
|
|
/* Load in the data residue counter into the CSW */
|
|
CommandStatus.DataTransferResidue = CommandBlock.DataTransferLength;
|
|
|
|
/* Stall the selected data pipe if command failed (if data is still to be transferred) */
|
|
if ((CommandStatus.Status == MS_SCSI_COMMAND_Fail) && (CommandStatus.DataTransferResidue))
|
|
Endpoint_StallTransaction();
|
|
|
|
/* Return command status block to the host */
|
|
ReturnCommandStatus();
|
|
|
|
/* Indicate ready */
|
|
LEDs_SetAllLEDs(LEDMASK_USB_READY);
|
|
}
|
|
|
|
/* Check if a Mass Storage Reset occurred */
|
|
if (IsMassStoreReset)
|
|
{
|
|
/* Reset the data endpoint banks */
|
|
Endpoint_ResetEndpoint(MASS_STORAGE_OUT_EPADDR);
|
|
Endpoint_ResetEndpoint(MASS_STORAGE_IN_EPADDR);
|
|
|
|
Endpoint_SelectEndpoint(MASS_STORAGE_OUT_EPADDR);
|
|
Endpoint_ClearStall();
|
|
Endpoint_ResetDataToggle();
|
|
Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPADDR);
|
|
Endpoint_ClearStall();
|
|
Endpoint_ResetDataToggle();
|
|
|
|
/* Clear the abort transfer flag */
|
|
IsMassStoreReset = false;
|
|
}
|
|
}
|
|
|
|
/** Function to read in a command block from the host, via the bulk data OUT endpoint. This function reads in the next command block
|
|
* if one has been issued, and performs validation to ensure that the block command is valid.
|
|
*
|
|
* \return Boolean true if a valid command block has been read in from the endpoint, false otherwise
|
|
*/
|
|
static bool ReadInCommandBlock(void)
|
|
{
|
|
uint16_t BytesTransferred;
|
|
|
|
/* Select the Data Out endpoint */
|
|
Endpoint_SelectEndpoint(MASS_STORAGE_OUT_EPADDR);
|
|
|
|
/* Abort if no command has been sent from the host */
|
|
if (!(Endpoint_IsOUTReceived()))
|
|
return false;
|
|
|
|
/* Read in command block header */
|
|
BytesTransferred = 0;
|
|
while (Endpoint_Read_Stream_LE(&CommandBlock, (sizeof(CommandBlock) - sizeof(CommandBlock.SCSICommandData)),
|
|
&BytesTransferred) == ENDPOINT_RWSTREAM_IncompleteTransfer)
|
|
{
|
|
/* Check if the current command is being aborted by the host */
|
|
if (IsMassStoreReset)
|
|
return false;
|
|
}
|
|
|
|
/* Verify the command block - abort if invalid */
|
|
if ((CommandBlock.Signature != MS_CBW_SIGNATURE) ||
|
|
(CommandBlock.LUN >= TOTAL_LUNS) ||
|
|
(CommandBlock.Flags & 0x1F) ||
|
|
(CommandBlock.SCSICommandLength == 0) ||
|
|
(CommandBlock.SCSICommandLength > sizeof(CommandBlock.SCSICommandData)))
|
|
{
|
|
/* Stall both data pipes until reset by host */
|
|
Endpoint_StallTransaction();
|
|
Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPADDR);
|
|
Endpoint_StallTransaction();
|
|
|
|
return false;
|
|
}
|
|
|
|
/* Read in command block command data */
|
|
BytesTransferred = 0;
|
|
while (Endpoint_Read_Stream_LE(&CommandBlock.SCSICommandData, CommandBlock.SCSICommandLength,
|
|
&BytesTransferred) == ENDPOINT_RWSTREAM_IncompleteTransfer)
|
|
{
|
|
/* Check if the current command is being aborted by the host */
|
|
if (IsMassStoreReset)
|
|
return false;
|
|
}
|
|
|
|
/* Finalize the stream transfer to send the last packet */
|
|
Endpoint_ClearOUT();
|
|
|
|
return true;
|
|
}
|
|
|
|
/** Returns the filled Command Status Wrapper back to the host via the bulk data IN endpoint, waiting for the host to clear any
|
|
* stalled data endpoints as needed.
|
|
*/
|
|
static void ReturnCommandStatus(void)
|
|
{
|
|
uint16_t BytesTransferred;
|
|
|
|
/* Select the Data Out endpoint */
|
|
Endpoint_SelectEndpoint(MASS_STORAGE_OUT_EPADDR);
|
|
|
|
/* While data pipe is stalled, wait until the host issues a control request to clear the stall */
|
|
while (Endpoint_IsStalled())
|
|
{
|
|
/* Check if the current command is being aborted by the host */
|
|
if (IsMassStoreReset)
|
|
return;
|
|
}
|
|
|
|
/* Select the Data In endpoint */
|
|
Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPADDR);
|
|
|
|
/* While data pipe is stalled, wait until the host issues a control request to clear the stall */
|
|
while (Endpoint_IsStalled())
|
|
{
|
|
/* Check if the current command is being aborted by the host */
|
|
if (IsMassStoreReset)
|
|
return;
|
|
}
|
|
|
|
/* Write the CSW to the endpoint */
|
|
BytesTransferred = 0;
|
|
while (Endpoint_Write_Stream_LE(&CommandStatus, sizeof(CommandStatus),
|
|
&BytesTransferred) == ENDPOINT_RWSTREAM_IncompleteTransfer)
|
|
{
|
|
/* Check if the current command is being aborted by the host */
|
|
if (IsMassStoreReset)
|
|
return;
|
|
}
|
|
|
|
/* Finalize the stream transfer to send the last packet */
|
|
Endpoint_ClearIN();
|
|
}
|
|
|