/*
LUFA Library
- Copyright (C) Dean Camera, 2010.
-
+ Copyright (C) Dean Camera, 2011.
+
dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
+ www.lufa-lib.org
*/
/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
- Permission to use, copy, modify, distribute, and sell this
+ 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
+ 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
+ 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 disclaim all warranties with regard to this
* devices use a thin "Bulk-Only Transport" protocol for issuing commands and status information,
* which wrap around standard SCSI device commands for controlling the actual storage medium.
*/
-
+
#define INCLUDE_FROM_SCSI_C
#include "SCSI.h"
/** Structure to hold the SCSI response data to a SCSI INQUIRY command. This gives information about the device's
* features and capabilities.
*/
-SCSI_Inquiry_Response_t InquiryData =
+static const SCSI_Inquiry_Response_t InquiryData =
{
.DeviceType = DEVICE_TYPE_BLOCK,
.PeripheralQualifier = 0,
-
+
.Removable = true,
-
+
.Version = 0,
-
+
.ResponseDataFormat = 2,
.NormACA = false,
.TrmTsk = false,
.AERC = false,
.AdditionalLength = 0x1F,
-
+
.SoftReset = false,
.CmdQue = false,
.Linked = false,
.WideBus16Bit = false,
.WideBus32Bit = false,
.RelAddr = false,
-
+
.VendorID = "LUFA",
.ProductID = "Dataflash Disk",
.RevisionID = {'0','.','0','0'},
/** Structure to hold the sense data for the last issued SCSI command, which is returned to the host after a SCSI REQUEST SENSE
* command is issued. This gives information on exactly why the last command failed to complete.
*/
-SCSI_Request_Sense_Response_t SenseData =
+static SCSI_Request_Sense_Response_t SenseData =
{
.ResponseCode = 0x70,
.AdditionalLength = 0x0A,
switch (CommandBlock.SCSICommandData[0])
{
case SCSI_CMD_INQUIRY:
- CommandSuccess = SCSI_Command_Inquiry();
+ CommandSuccess = SCSI_Command_Inquiry();
break;
case SCSI_CMD_REQUEST_SENSE:
CommandSuccess = SCSI_Command_Request_Sense();
break;
case SCSI_CMD_READ_CAPACITY_10:
- CommandSuccess = SCSI_Command_Read_Capacity_10();
+ CommandSuccess = SCSI_Command_Read_Capacity_10();
break;
case SCSI_CMD_SEND_DIAGNOSTIC:
CommandSuccess = SCSI_Command_Send_Diagnostic();
case SCSI_CMD_READ_10:
CommandSuccess = SCSI_Command_ReadWrite_10(DATA_READ);
break;
+ case SCSI_CMD_MODE_SENSE_6:
+ CommandSuccess = SCSI_Command_ModeSense_6();
+ break;
case SCSI_CMD_TEST_UNIT_READY:
case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
case SCSI_CMD_VERIFY_10:
SCSI_ASENSEQ_NO_QUALIFIER);
break;
}
-
+
/* Check if command was successfully processed */
if (CommandSuccess)
{
SCSI_SET_SENSE(SCSI_SENSE_KEY_GOOD,
SCSI_ASENSE_NO_ADDITIONAL_INFORMATION,
SCSI_ASENSEQ_NO_QUALIFIER);
-
+
return true;
}
static bool SCSI_Command_Inquiry(void)
{
uint16_t AllocationLength = SwapEndian_16(*(uint16_t*)&CommandBlock.SCSICommandData[3]);
- uint16_t BytesTransferred = (AllocationLength < sizeof(InquiryData))? AllocationLength :
- sizeof(InquiryData);
+ uint16_t BytesTransferred = MIN(AllocationLength, sizeof(InquiryData));
/* Only the standard INQUIRY data is supported, check if any optional INQUIRY bits set */
if ((CommandBlock.SCSICommandData[1] & ((1 << 0) | (1 << 1))) ||
}
/* Write the INQUIRY data to the endpoint */
- Endpoint_Write_Stream_LE(&InquiryData, BytesTransferred, StreamCallback_AbortOnMassStoreReset);
+ Endpoint_Write_Stream_LE(&InquiryData, BytesTransferred, NULL);
- uint8_t PadBytes[AllocationLength - BytesTransferred];
-
/* Pad out remaining bytes with 0x00 */
- Endpoint_Write_Stream_LE(&PadBytes, sizeof(PadBytes), StreamCallback_AbortOnMassStoreReset);
+ Endpoint_Null_Stream((AllocationLength - BytesTransferred), NULL);
/* Finalize the stream transfer to send the last packet */
Endpoint_ClearIN();
/* Succeed the command and update the bytes transferred counter */
CommandBlock.DataTransferLength -= BytesTransferred;
-
+
return true;
}
static bool SCSI_Command_Request_Sense(void)
{
uint8_t AllocationLength = CommandBlock.SCSICommandData[4];
- uint8_t BytesTransferred = (AllocationLength < sizeof(SenseData))? AllocationLength : sizeof(SenseData);
-
+ uint8_t BytesTransferred = MIN(AllocationLength, sizeof(SenseData));
+
/* Send the SENSE data - this indicates to the host the status of the last command */
- Endpoint_Write_Stream_LE(&SenseData, BytesTransferred, StreamCallback_AbortOnMassStoreReset);
-
- uint8_t PadBytes[AllocationLength - BytesTransferred];
-
+ Endpoint_Write_Stream_LE(&SenseData, BytesTransferred, NULL);
+
/* Pad out remaining bytes with 0x00 */
- Endpoint_Write_Stream_LE(&PadBytes, sizeof(PadBytes), StreamCallback_AbortOnMassStoreReset);
+ Endpoint_Null_Stream((AllocationLength - BytesTransferred), NULL);
/* Finalize the stream transfer to send the last packet */
Endpoint_ClearIN();
static bool SCSI_Command_Read_Capacity_10(void)
{
/* Send the total number of logical blocks in the current LUN */
- Endpoint_Write_DWord_BE(LUN_MEDIA_BLOCKS - 1);
+ Endpoint_Write_32_BE(LUN_MEDIA_BLOCKS - 1);
/* Send the logical block size of the device (must be 512 bytes) */
- Endpoint_Write_DWord_BE(VIRTUAL_MEMORY_BLOCK_SIZE);
+ Endpoint_Write_32_BE(VIRTUAL_MEMORY_BLOCK_SIZE);
/* Check if the current command is being aborted by the host */
if (IsMassStoreReset)
/* Succeed the command and update the bytes transferred counter */
CommandBlock.DataTransferLength -= 8;
-
+
return true;
}
return false;
}
-
+
/* Check to see if all attached Dataflash ICs are functional */
if (!(DataflashManager_CheckDataflashOperation()))
{
/* Update SENSE key with a hardware error condition and return command fail */
SCSI_SET_SENSE(SCSI_SENSE_KEY_HARDWARE_ERROR,
SCSI_ASENSE_NO_ADDITIONAL_INFORMATION,
- SCSI_ASENSEQ_NO_QUALIFIER);
-
+ SCSI_ASENSEQ_NO_QUALIFIER);
+
return false;
}
-
+
/* Succeed the command and update the bytes transferred counter */
CommandBlock.DataTransferLength = 0;
-
+
return true;
}
*/
static bool SCSI_Command_ReadWrite_10(const bool IsDataRead)
{
- uint32_t BlockAddress = SwapEndian_32(*(uint32_t*)&CommandBlock.SCSICommandData[2]);
- uint16_t TotalBlocks = SwapEndian_16(*(uint16_t*)&CommandBlock.SCSICommandData[7]);
+ uint32_t BlockAddress;
+ uint16_t TotalBlocks;
+ /* Check if the disk is write protected or not */
+ if ((IsDataRead == DATA_WRITE) && DISK_READ_ONLY)
+ {
+ /* Block address is invalid, update SENSE key and return command fail */
+ SCSI_SET_SENSE(SCSI_SENSE_KEY_DATA_PROTECT,
+ SCSI_ASENSE_WRITE_PROTECTED,
+ SCSI_ASENSEQ_NO_QUALIFIER);
+
+ return false;
+ }
+
+ BlockAddress = SwapEndian_32(*(uint32_t*)&CommandBlock.SCSICommandData[2]);
+ TotalBlocks = SwapEndian_16(*(uint16_t*)&CommandBlock.SCSICommandData[7]);
+
/* Check if the block address is outside the maximum allowable value for the LUN */
if (BlockAddress >= LUN_MEDIA_BLOCKS)
{
/* Adjust the given block address to the real media address based on the selected LUN */
BlockAddress += ((uint32_t)CommandBlock.LUN * LUN_MEDIA_BLOCKS);
#endif
-
+
/* Determine if the packet is a READ (10) or WRITE (10) command, call appropriate function */
if (IsDataRead == DATA_READ)
DataflashManager_ReadBlocks(BlockAddress, TotalBlocks);
/* Update the bytes transferred counter and succeed the command */
CommandBlock.DataTransferLength -= ((uint32_t)TotalBlocks * VIRTUAL_MEMORY_BLOCK_SIZE);
-
+
+ return true;
+}
+
+/** Command processing for an issued SCSI MODE SENSE (6) command. This command returns various informational pages about
+ * the SCSI device, as well as the device's Write Protect status.
+ *
+ * \return Boolean true if the command completed successfully, false otherwise.
+ */
+static bool SCSI_Command_ModeSense_6(void)
+{
+ /* Send an empty header response with the Write Protect flag status */
+ Endpoint_Write_8(0x00);
+ Endpoint_Write_8(0x00);
+ Endpoint_Write_8(DISK_READ_ONLY ? 0x80 : 0x00);
+ Endpoint_Write_8(0x00);
+ Endpoint_ClearIN();
+
+ /* Update the bytes transferred counter and succeed the command */
+ CommandBlock.DataTransferLength -= 4;
+
return true;
}
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