void usb_stor_transparent_scsi_command(Scsi_Cmnd *srb, struct us_data *us)
{
/* send the command to the transport layer */
usb_stor_invoke_transport(srb, us);
if (srb->result == SAM_STAT_GOOD) {
/* Fix the INQUIRY data if necessary */
fix_inquiry_data(srb);
/* Fix the READ CAPACITY result if necessary */
if (us->flags & US_FL_FIX_CAPACITY)
fix_read_capacity(srb);
}
}
void usb_stor_ufi_command(Scsi_Cmnd *srb, struct us_data *us)
{
/* fix some commands -- this is a form of mode translation
* UFI devices only accept 12 byte long commands
*
* NOTE: This only works because a Scsi_Cmnd struct field contains
* a unsigned char cmnd[16], so we know we have storage available
*/
/* Pad the ATAPI command with zeros */
for (; srb->cmd_len<12; srb->cmd_len++)
srb->cmnd[srb->cmd_len] = 0;
/* set command length to 12 bytes (this affects the transport layer) */
srb->cmd_len = 12;
/* XXX We should be constantly re-evaluating the need for these */
/* determine the correct data length for these commands */
switch (srb->cmnd[0]) {
/* for INQUIRY, UFI devices only ever return 36 bytes */
case INQUIRY:
srb->cmnd[4] = 36;
break;
/* again, for MODE_SENSE_10, we get the minimum (8) */
case MODE_SENSE_10:
srb->cmnd[7] = 0;
srb->cmnd[8] = 8;
break;
/* for REQUEST_SENSE, UFI devices only ever return 18 bytes */
case REQUEST_SENSE:
srb->cmnd[4] = 18;
break;
} /* end switch on cmnd[0] */
/* send the command to the transport layer */
usb_stor_invoke_transport(srb, us);
if (srb->result == SAM_STAT_GOOD) {
/* Fix the data for an INQUIRY, if necessary */
fix_inquiry_data(srb);
}
}
/***********************************************************************
* Protocol routines
***********************************************************************/
void UMAS_Qic157Command(SCSI_CMD_T *srb, UMAS_DATA_T *umas)
{
/*
* Pad the ATAPI command with zeros
* NOTE: This only works because a SCSI_CMD_T struct field contains
* a uint8_t cmnd[12], so we know we have storage available
*/
for(; srb->cmd_len < 12; srb->cmd_len++)
srb->cmnd[srb->cmd_len] = 0;
/* set command length to 12 bytes */
srb->cmd_len = 12;
/* send the command to the transport layer */
UMAS_InvokeTransport(srb, umas);
/* fix the INQUIRY data if necessary */
fix_inquiry_data(srb);
}
void usb_stor_qic157_command(Scsi_Cmnd *srb, struct us_data *us)
{
/* Pad the ATAPI command with zeros
*
* NOTE: This only works because a Scsi_Cmnd struct field contains
* a unsigned char cmnd[16], so we know we have storage available
*/
for (; srb->cmd_len<12; srb->cmd_len++)
srb->cmnd[srb->cmd_len] = 0;
/* set command length to 12 bytes */
srb->cmd_len = 12;
/* send the command to the transport layer */
usb_stor_invoke_transport(srb, us);
if (srb->result == SAM_STAT_GOOD) {
/* fix the INQUIRY data if necessary */
fix_inquiry_data(srb);
}
}
void UMAS_TransparentScsiCommand(SCSI_CMD_T *srb, UMAS_DATA_T *umas)
{
/*
* This code supports devices which do not support {READ|WRITE}_6
* Apparently, neither Windows or MacOS will use these commands,
* so some devices do not support them
*/
if(umas->flags & UMAS_FL_MODE_XLATE)
{
/* translate READ_6 to READ_10 */
if(srb->cmnd[0] == READ_6)
{
/* get the control */
srb->cmnd[9] = umas->srb.cmnd[5];
/* get the length */
srb->cmnd[8] = umas->srb.cmnd[6];
srb->cmnd[7] = 0;
/* set the reserved area to 0 */
srb->cmnd[6] = 0;
/* get LBA */
srb->cmnd[5] = umas->srb.cmnd[3];
srb->cmnd[4] = umas->srb.cmnd[2];
srb->cmnd[3] = 0;
srb->cmnd[2] = 0;
/* LUN and other info in cmnd[1] can stay */
/* fix command code */
srb->cmnd[0] = 0x28;
UMAS_DEBUG("Changing READ_6 to READ_10\n");
UMAS_DEBUG_ShowCommand(srb);
}
/* translate WRITE_6 to WRITE_10 */
if(srb->cmnd[0] == WRITE_6)
{
/* get the control */
srb->cmnd[9] = umas->srb.cmnd[5];
/* get the length */
srb->cmnd[8] = umas->srb.cmnd[4];
srb->cmnd[7] = 0;
/* set the reserved area to 0 */
srb->cmnd[6] = 0;
/* get LBA */
srb->cmnd[5] = umas->srb.cmnd[3];
srb->cmnd[4] = umas->srb.cmnd[2];
srb->cmnd[3] = 0;
srb->cmnd[2] = 0;
/* LUN and other info in cmnd[1] can stay */
/* fix command code */
srb->cmnd[0] = 0x2A;
UMAS_DEBUG("Changing WRITE_6 to WRITE_10\n");
UMAS_DEBUG_ShowCommand(&umas->srb);
}
} /* if (umas->flags & UMAS_FL_MODE_XLATE) */
/* send the command to the transport layer */
UMAS_InvokeTransport(srb, umas);
/* fix the INQUIRY data if necessary */
fix_inquiry_data(srb);
}
void UMAS_UfiCommand(SCSI_CMD_T *srb, UMAS_DATA_T *umas)
{
int old_cmnd = 0;
/*
* fix some commands -- this is a form of mode translation
* UFI devices only accept 12 byte long commands
*
* NOTE: This only works because a SCSI_CMD_T struct field contains
* a uint8_t cmnd[12], so we know we have storage available
*/
/* set command length to 12 bytes (this affects the transport layer) */
srb->cmd_len = 12;
/* determine the correct (or minimum) data length for these commands */
switch(srb->cmnd[0])
{
/* for INQUIRY, UFI devices only ever return 36 bytes */
case INQUIRY:
srb->cmnd[4] = 36;
break;
/* change MODE_SENSE/MODE_SELECT from 6 to 10 byte commands */
case MODE_SENSE:
case MODE_SELECT:
/* save the command so we can tell what it was */
old_cmnd = srb->cmnd[0];
srb->cmnd[11] = 0;
srb->cmnd[10] = 0;
srb->cmnd[9] = 0;
/*
* If we're sending data, we send all. If getting data,
* get the minimum
*/
if(srb->cmnd[0] == MODE_SELECT)
srb->cmnd[8] = srb->cmnd[4];
else
srb->cmnd[8] = 8;
srb->cmnd[7] = 0;
srb->cmnd[6] = 0;
srb->cmnd[5] = 0;
srb->cmnd[4] = 0;
srb->cmnd[3] = 0;
srb->cmnd[2] = srb->cmnd[2];
srb->cmnd[1] = srb->cmnd[1];
srb->cmnd[0] = srb->cmnd[0] | 0x40;
break;
/* again, for MODE_SENSE_10, we get the minimum (8) */
case MODE_SENSE_10:
srb->cmnd[7] = 0;
srb->cmnd[8] = 8;
break;
/* for REQUEST_SENSE, UFI devices only ever return 18 bytes */
case REQUEST_SENSE:
srb->cmnd[4] = 18;
break;
/* change READ_6/WRITE_6 to READ_10/WRITE_10, which are UFI commands */
case WRITE_6:
case READ_6:
srb->cmnd[11] = 0;
srb->cmnd[10] = 0;
srb->cmnd[9] = 0;
srb->cmnd[8] = srb->cmnd[4];
srb->cmnd[7] = 0;
srb->cmnd[6] = 0;
srb->cmnd[5] = srb->cmnd[3];
srb->cmnd[4] = srb->cmnd[2];
srb->cmnd[3] = srb->cmnd[1] & 0x1F;
srb->cmnd[2] = 0;
srb->cmnd[1] = srb->cmnd[1] & 0xE0;
srb->cmnd[0] = srb->cmnd[0] | 0x20;
break;
} /* end switch on cmnd[0] */
/* convert MODE_SELECT data here */
if(old_cmnd == MODE_SELECT)
usb_stor_scsiSense6to10(srb);
/* send the command to the transport layer */
UMAS_InvokeTransport(srb, umas);
/* Fix the MODE_SENSE data if we translated the command */
if((old_cmnd == MODE_SENSE) && (status_byte(srb->result) == GOOD))
usb_stor_scsiSense10to6(srb);
/* Fix the data for an INQUIRY, if necessary */
fix_inquiry_data(srb);
}
void UMAS_AtapiCommand(SCSI_CMD_T *srb, UMAS_DATA_T *umas)
{
int old_cmnd = 0;
/*
* Fix some commands -- this is a form of mode translation
* ATAPI devices only accept 12 byte long commands
*
* NOTE: This only works because a SCSI_CMD_T struct field contains
* a uint8_t cmnd[12], so we know we have storage available
*/
/* Pad the ATAPI command with zeros */
for(; srb->cmd_len < 12; srb->cmd_len++)
srb->cmnd[srb->cmd_len] = 0;
/* set command length to 12 bytes */
srb->cmd_len = 12;
/* determine the correct (or minimum) data length for these commands */
switch(srb->cmnd[0])
{
/* change MODE_SENSE/MODE_SELECT from 6 to 10 byte commands */
case MODE_SENSE:
case MODE_SELECT:
/* save the command so we can tell what it was */
old_cmnd = srb->cmnd[0];
srb->cmnd[11] = 0;
srb->cmnd[10] = 0;
srb->cmnd[9] = 0;
srb->cmnd[8] = srb->cmnd[4];
srb->cmnd[7] = 0;
srb->cmnd[6] = 0;
srb->cmnd[5] = 0;
srb->cmnd[4] = 0;
srb->cmnd[3] = 0;
srb->cmnd[2] = srb->cmnd[2];
srb->cmnd[1] = srb->cmnd[1];
srb->cmnd[0] = srb->cmnd[0] | 0x40;
break;
/* change READ_6/WRITE_6 to READ_10/WRITE_10, which are ATAPI commands */
case WRITE_6:
case READ_6:
srb->cmnd[11] = 0;
srb->cmnd[10] = 0;
srb->cmnd[9] = 0;
srb->cmnd[8] = srb->cmnd[4];
srb->cmnd[7] = 0;
srb->cmnd[6] = 0;
srb->cmnd[5] = srb->cmnd[3];
srb->cmnd[4] = srb->cmnd[2];
srb->cmnd[3] = srb->cmnd[1] & 0x1F;
srb->cmnd[2] = 0;
srb->cmnd[1] = srb->cmnd[1] & 0xE0;
srb->cmnd[0] = srb->cmnd[0] | 0x20;
break;
} /* end switch on cmnd[0] */
/* convert MODE_SELECT data here */
if(old_cmnd == MODE_SELECT)
usb_stor_scsiSense6to10(srb);
/* send the command to the transport layer */
UMAS_InvokeTransport(srb, umas);
/* Fix the MODE_SENSE data if we translated the command */
if((old_cmnd == MODE_SENSE) && (status_byte(srb->result) == GOOD))
usb_stor_scsiSense10to6(srb);
/* fix the INQUIRY data if necessary */
fix_inquiry_data(srb);
}
