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linux/drivers/usb/storage/isd200.c
Colin Ian King 446230f52a usb: storage: return on error to avoid a null pointer dereference 
When us->extra is null the driver is not initialized, however, a
later call to osd200_scsi_to_ata is made that dereferences
us->extra, causing a null pointer dereference.  The code
currently detects and reports that the driver is not initialized;
add a return to avoid the subsequent dereference issue in this
check.

Thanks to Alan Stern for pointing out that srb->result needs setting
to DID_ERROR << 16

Detected by CoverityScan, CID#100308 ("Dereference after null check")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-07-17 13:11:57 +02:00

1586 lines
45 KiB
C
Raw Blame History

/*
* Transport & Protocol Driver for In-System Design, Inc. ISD200 ASIC
*
* Current development and maintenance:
* (C) 2001-2002 Björn Stenberg (bjorn@haxx.se)
*
* Developed with the assistance of:
* (C) 2002 Alan Stern <stern@rowland.org>
*
* Initial work:
* (C) 2000 In-System Design, Inc. (support@in-system.com)
*
* The ISD200 ASIC does not natively support ATA devices. The chip
* does implement an interface, the ATA Command Block (ATACB) which provides
* a means of passing ATA commands and ATA register accesses to a device.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
* History:
*
* 2002-10-19: Removed the specialized transfer routines.
* (Alan Stern <stern@rowland.harvard.edu>)
* 2001-02-24: Removed lots of duplicate code and simplified the structure.
* (bjorn@haxx.se)
* 2002-01-16: Fixed endianness bug so it works on the ppc arch.
* (Luc Saillard <luc@saillard.org>)
* 2002-01-17: All bitfields removed.
* (bjorn@haxx.se)
*/
/* Include files */
#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/ata.h>
#include <linux/hdreg.h>
#include <linux/scatterlist.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include "usb.h"
#include "transport.h"
#include "protocol.h"
#include "debug.h"
#include "scsiglue.h"
#define DRV_NAME "ums-isd200"
MODULE_DESCRIPTION("Driver for In-System Design, Inc. ISD200 ASIC");
MODULE_AUTHOR("Björn Stenberg <bjorn@haxx.se>");
MODULE_LICENSE("GPL");
static int isd200_Initialization(struct us_data *us);
/*
* The table of devices
*/
#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
vendorName, productName, useProtocol, useTransport, \
initFunction, flags) \
{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
.driver_info = (flags) }
static struct usb_device_id isd200_usb_ids[] = {
# include "unusual_isd200.h"
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, isd200_usb_ids);
#undef UNUSUAL_DEV
/*
* The flags table
*/
#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
vendor_name, product_name, use_protocol, use_transport, \
init_function, Flags) \
{ \
.vendorName = vendor_name, \
.productName = product_name, \
.useProtocol = use_protocol, \
.useTransport = use_transport, \
.initFunction = init_function, \
}
static struct us_unusual_dev isd200_unusual_dev_list[] = {
# include "unusual_isd200.h"
{ } /* Terminating entry */
};
#undef UNUSUAL_DEV
/* Timeout defines (in Seconds) */
#define ISD200_ENUM_BSY_TIMEOUT 35
#define ISD200_ENUM_DETECT_TIMEOUT 30
#define ISD200_DEFAULT_TIMEOUT 30
/* device flags */
#define DF_ATA_DEVICE 0x0001
#define DF_MEDIA_STATUS_ENABLED 0x0002
#define DF_REMOVABLE_MEDIA 0x0004
/* capability bit definitions */
#define CAPABILITY_DMA 0x01
#define CAPABILITY_LBA 0x02
/* command_setX bit definitions */
#define COMMANDSET_REMOVABLE 0x02
#define COMMANDSET_MEDIA_STATUS 0x10
/* ATA Vendor Specific defines */
#define ATA_ADDRESS_DEVHEAD_STD 0xa0
#define ATA_ADDRESS_DEVHEAD_LBA_MODE 0x40
#define ATA_ADDRESS_DEVHEAD_SLAVE 0x10
/* Action Select bits */
#define ACTION_SELECT_0 0x01
#define ACTION_SELECT_1 0x02
#define ACTION_SELECT_2 0x04
#define ACTION_SELECT_3 0x08
#define ACTION_SELECT_4 0x10
#define ACTION_SELECT_5 0x20
#define ACTION_SELECT_6 0x40
#define ACTION_SELECT_7 0x80
/* Register Select bits */
#define REG_ALTERNATE_STATUS 0x01
#define REG_DEVICE_CONTROL 0x01
#define REG_ERROR 0x02
#define REG_FEATURES 0x02
#define REG_SECTOR_COUNT 0x04
#define REG_SECTOR_NUMBER 0x08
#define REG_CYLINDER_LOW 0x10
#define REG_CYLINDER_HIGH 0x20
#define REG_DEVICE_HEAD 0x40
#define REG_STATUS 0x80
#define REG_COMMAND 0x80
/* ATA registers offset definitions */
#define ATA_REG_ERROR_OFFSET 1
#define ATA_REG_LCYL_OFFSET 4
#define ATA_REG_HCYL_OFFSET 5
#define ATA_REG_STATUS_OFFSET 7
/* ATA error definitions not in <linux/hdreg.h> */
#define ATA_ERROR_MEDIA_CHANGE 0x20
/* ATA command definitions not in <linux/hdreg.h> */
#define ATA_COMMAND_GET_MEDIA_STATUS 0xDA
#define ATA_COMMAND_MEDIA_EJECT 0xED
/* ATA drive control definitions */
#define ATA_DC_DISABLE_INTERRUPTS 0x02
#define ATA_DC_RESET_CONTROLLER 0x04
#define ATA_DC_REENABLE_CONTROLLER 0x00
/*
* General purpose return codes
*/
#define ISD200_ERROR -1
#define ISD200_GOOD 0
/*
* Transport return codes
*/
#define ISD200_TRANSPORT_GOOD 0 /* Transport good, command good */
#define ISD200_TRANSPORT_FAILED 1 /* Transport good, command failed */
#define ISD200_TRANSPORT_ERROR 2 /* Transport bad (i.e. device dead) */
/* driver action codes */
#define ACTION_READ_STATUS 0
#define ACTION_RESET 1
#define ACTION_REENABLE 2
#define ACTION_SOFT_RESET 3
#define ACTION_ENUM 4
#define ACTION_IDENTIFY 5
/*
* ata_cdb struct
*/
union ata_cdb {
struct {
unsigned char SignatureByte0;
unsigned char SignatureByte1;
unsigned char ActionSelect;
unsigned char RegisterSelect;
unsigned char TransferBlockSize;
unsigned char WriteData3F6;
unsigned char WriteData1F1;
unsigned char WriteData1F2;
unsigned char WriteData1F3;
unsigned char WriteData1F4;
unsigned char WriteData1F5;
unsigned char WriteData1F6;
unsigned char WriteData1F7;
unsigned char Reserved[3];
} generic;
struct {
unsigned char SignatureByte0;
unsigned char SignatureByte1;
unsigned char ActionSelect;
unsigned char RegisterSelect;
unsigned char TransferBlockSize;
unsigned char AlternateStatusByte;
unsigned char ErrorByte;
unsigned char SectorCountByte;
unsigned char SectorNumberByte;
unsigned char CylinderLowByte;
unsigned char CylinderHighByte;
unsigned char DeviceHeadByte;
unsigned char StatusByte;
unsigned char Reserved[3];
} read;
struct {
unsigned char SignatureByte0;
unsigned char SignatureByte1;
unsigned char ActionSelect;
unsigned char RegisterSelect;
unsigned char TransferBlockSize;
unsigned char DeviceControlByte;
unsigned char FeaturesByte;
unsigned char SectorCountByte;
unsigned char SectorNumberByte;
unsigned char CylinderLowByte;
unsigned char CylinderHighByte;
unsigned char DeviceHeadByte;
unsigned char CommandByte;
unsigned char Reserved[3];
} write;
};
/*
* Inquiry data structure. This is the data returned from the target
* after it receives an inquiry.
*
* This structure may be extended by the number of bytes specified
* in the field AdditionalLength. The defined size constant only
* includes fields through ProductRevisionLevel.
*/
/*
* DeviceType field
*/
#define DIRECT_ACCESS_DEVICE 0x00 /* disks */
#define DEVICE_REMOVABLE 0x80
struct inquiry_data {
unsigned char DeviceType;
unsigned char DeviceTypeModifier;
unsigned char Versions;
unsigned char Format;
unsigned char AdditionalLength;
unsigned char Reserved[2];
unsigned char Capability;
unsigned char VendorId[8];
unsigned char ProductId[16];
unsigned char ProductRevisionLevel[4];
unsigned char VendorSpecific[20];
unsigned char Reserved3[40];
} __attribute__ ((packed));
/*
* INQUIRY data buffer size
*/
#define INQUIRYDATABUFFERSIZE 36
/*
* ISD200 CONFIG data struct
*/
#define ATACFG_TIMING 0x0f
#define ATACFG_ATAPI_RESET 0x10
#define ATACFG_MASTER 0x20
#define ATACFG_BLOCKSIZE 0xa0
#define ATACFGE_LAST_LUN 0x07
#define ATACFGE_DESC_OVERRIDE 0x08
#define ATACFGE_STATE_SUSPEND 0x10
#define ATACFGE_SKIP_BOOT 0x20
#define ATACFGE_CONF_DESC2 0x40
#define ATACFGE_INIT_STATUS 0x80
#define CFG_CAPABILITY_SRST 0x01
struct isd200_config {
unsigned char EventNotification;
unsigned char ExternalClock;
unsigned char ATAInitTimeout;
unsigned char ATAConfig;
unsigned char ATAMajorCommand;
unsigned char ATAMinorCommand;
unsigned char ATAExtraConfig;
unsigned char Capability;
}__attribute__ ((packed));
/*
* ISD200 driver information struct
*/
struct isd200_info {
struct inquiry_data InquiryData;
u16 *id;
struct isd200_config ConfigData;
unsigned char *RegsBuf;
unsigned char ATARegs[8];
unsigned char DeviceHead;
unsigned char DeviceFlags;
/* maximum number of LUNs supported */
unsigned char MaxLUNs;
unsigned char cmnd[BLK_MAX_CDB];
struct scsi_cmnd srb;
struct scatterlist sg;
};
/*
* Read Capacity Data - returned in Big Endian format
*/
struct read_capacity_data {
__be32 LogicalBlockAddress;
__be32 BytesPerBlock;
};
/*
* Read Block Limits Data - returned in Big Endian format
* This structure returns the maximum and minimum block
* size for a TAPE device.
*/
struct read_block_limits {
unsigned char Reserved;
unsigned char BlockMaximumSize[3];
unsigned char BlockMinimumSize[2];
};
/*
* Sense Data Format
*/
#define SENSE_ERRCODE 0x7f
#define SENSE_ERRCODE_VALID 0x80
#define SENSE_FLAG_SENSE_KEY 0x0f
#define SENSE_FLAG_BAD_LENGTH 0x20
#define SENSE_FLAG_END_OF_MEDIA 0x40
#define SENSE_FLAG_FILE_MARK 0x80
struct sense_data {
unsigned char ErrorCode;
unsigned char SegmentNumber;
unsigned char Flags;
unsigned char Information[4];
unsigned char AdditionalSenseLength;
unsigned char CommandSpecificInformation[4];
unsigned char AdditionalSenseCode;
unsigned char AdditionalSenseCodeQualifier;
unsigned char FieldReplaceableUnitCode;
unsigned char SenseKeySpecific[3];
} __attribute__ ((packed));
/*
* Default request sense buffer size
*/
#define SENSE_BUFFER_SIZE 18
/***********************************************************************
* Helper routines
***********************************************************************/
/**************************************************************************
* isd200_build_sense
*
* Builds an artificial sense buffer to report the results of a
* failed command.
*
* RETURNS:
* void
*/
static void isd200_build_sense(struct us_data *us, struct scsi_cmnd *srb)
{
struct isd200_info *info = (struct isd200_info *)us->extra;
struct sense_data *buf = (struct sense_data *) &srb->sense_buffer[0];
unsigned char error = info->ATARegs[ATA_REG_ERROR_OFFSET];
if(error & ATA_ERROR_MEDIA_CHANGE) {
buf->ErrorCode = 0x70 | SENSE_ERRCODE_VALID;
buf->AdditionalSenseLength = 0xb;
buf->Flags = UNIT_ATTENTION;
buf->AdditionalSenseCode = 0;
buf->AdditionalSenseCodeQualifier = 0;
} else if (error & ATA_MCR) {
buf->ErrorCode = 0x70 | SENSE_ERRCODE_VALID;
buf->AdditionalSenseLength = 0xb;
buf->Flags = UNIT_ATTENTION;
buf->AdditionalSenseCode = 0;
buf->AdditionalSenseCodeQualifier = 0;
} else if (error & ATA_TRK0NF) {
buf->ErrorCode = 0x70 | SENSE_ERRCODE_VALID;
buf->AdditionalSenseLength = 0xb;
buf->Flags = NOT_READY;
buf->AdditionalSenseCode = 0;
buf->AdditionalSenseCodeQualifier = 0;
} else if (error & ATA_UNC) {
buf->ErrorCode = 0x70 | SENSE_ERRCODE_VALID;
buf->AdditionalSenseLength = 0xb;
buf->Flags = DATA_PROTECT;
buf->AdditionalSenseCode = 0;
buf->AdditionalSenseCodeQualifier = 0;
} else {
buf->ErrorCode = 0;
buf->AdditionalSenseLength = 0;
buf->Flags = 0;
buf->AdditionalSenseCode = 0;
buf->AdditionalSenseCodeQualifier = 0;
}
}
/***********************************************************************
* Transport routines
***********************************************************************/
/**************************************************************************
* isd200_set_srb(), isd200_srb_set_bufflen()
*
* Two helpers to facilitate in initialization of scsi_cmnd structure
* Will need to change when struct scsi_cmnd changes
*/
static void isd200_set_srb(struct isd200_info *info,
enum dma_data_direction dir, void* buff, unsigned bufflen)
{
struct scsi_cmnd *srb = &info->srb;
if (buff)
sg_init_one(&info->sg, buff, bufflen);
srb->sc_data_direction = dir;
srb->sdb.table.sgl = buff ? &info->sg : NULL;
srb->sdb.length = bufflen;
srb->sdb.table.nents = buff ? 1 : 0;
}
static void isd200_srb_set_bufflen(struct scsi_cmnd *srb, unsigned bufflen)
{
srb->sdb.length = bufflen;
}
/**************************************************************************
* isd200_action
*
* Routine for sending commands to the isd200
*
* RETURNS:
* ISD status code
*/
static int isd200_action( struct us_data *us, int action,
void* pointer, int value )
{
union ata_cdb ata;
/* static to prevent this large struct being placed on the valuable stack */
static struct scsi_device srb_dev;
struct isd200_info *info = (struct isd200_info *)us->extra;
struct scsi_cmnd *srb = &info->srb;
int status;
memset(&ata, 0, sizeof(ata));
srb->cmnd = info->cmnd;
srb->device = &srb_dev;
ata.generic.SignatureByte0 = info->ConfigData.ATAMajorCommand;
ata.generic.SignatureByte1 = info->ConfigData.ATAMinorCommand;
ata.generic.TransferBlockSize = 1;
switch ( action ) {
case ACTION_READ_STATUS:
usb_stor_dbg(us, " isd200_action(READ_STATUS)\n");
ata.generic.ActionSelect = ACTION_SELECT_0|ACTION_SELECT_2;
ata.generic.RegisterSelect =
REG_CYLINDER_LOW | REG_CYLINDER_HIGH |
REG_STATUS | REG_ERROR;
isd200_set_srb(info, DMA_FROM_DEVICE, pointer, value);
break;
case ACTION_ENUM:
usb_stor_dbg(us, " isd200_action(ENUM,0x%02x)\n", value);
ata.generic.ActionSelect = ACTION_SELECT_1|ACTION_SELECT_2|
ACTION_SELECT_3|ACTION_SELECT_4|
ACTION_SELECT_5;
ata.generic.RegisterSelect = REG_DEVICE_HEAD;
ata.write.DeviceHeadByte = value;
isd200_set_srb(info, DMA_NONE, NULL, 0);
break;
case ACTION_RESET:
usb_stor_dbg(us, " isd200_action(RESET)\n");
ata.generic.ActionSelect = ACTION_SELECT_1|ACTION_SELECT_2|
ACTION_SELECT_3|ACTION_SELECT_4;
ata.generic.RegisterSelect = REG_DEVICE_CONTROL;
ata.write.DeviceControlByte = ATA_DC_RESET_CONTROLLER;
isd200_set_srb(info, DMA_NONE, NULL, 0);
break;
case ACTION_REENABLE:
usb_stor_dbg(us, " isd200_action(REENABLE)\n");
ata.generic.ActionSelect = ACTION_SELECT_1|ACTION_SELECT_2|
ACTION_SELECT_3|ACTION_SELECT_4;
ata.generic.RegisterSelect = REG_DEVICE_CONTROL;
ata.write.DeviceControlByte = ATA_DC_REENABLE_CONTROLLER;
isd200_set_srb(info, DMA_NONE, NULL, 0);
break;
case ACTION_SOFT_RESET:
usb_stor_dbg(us, " isd200_action(SOFT_RESET)\n");
ata.generic.ActionSelect = ACTION_SELECT_1|ACTION_SELECT_5;
ata.generic.RegisterSelect = REG_DEVICE_HEAD | REG_COMMAND;
ata.write.DeviceHeadByte = info->DeviceHead;
ata.write.CommandByte = ATA_CMD_DEV_RESET;
isd200_set_srb(info, DMA_NONE, NULL, 0);
break;
case ACTION_IDENTIFY:
usb_stor_dbg(us, " isd200_action(IDENTIFY)\n");
ata.generic.RegisterSelect = REG_COMMAND;
ata.write.CommandByte = ATA_CMD_ID_ATA;
isd200_set_srb(info, DMA_FROM_DEVICE, info->id,
ATA_ID_WORDS * 2);
break;
default:
usb_stor_dbg(us, "Error: Undefined action %d\n", action);
return ISD200_ERROR;
}
memcpy(srb->cmnd, &ata, sizeof(ata.generic));
srb->cmd_len = sizeof(ata.generic);
status = usb_stor_Bulk_transport(srb, us);
if (status == USB_STOR_TRANSPORT_GOOD)
status = ISD200_GOOD;
else {
usb_stor_dbg(us, " isd200_action(0x%02x) error: %d\n",
action, status);
status = ISD200_ERROR;
/* need to reset device here */
}
return status;
}
/**************************************************************************
* isd200_read_regs
*
* Read ATA Registers
*
* RETURNS:
* ISD status code
*/
static int isd200_read_regs( struct us_data *us )
{
struct isd200_info *info = (struct isd200_info *)us->extra;
int retStatus = ISD200_GOOD;
int transferStatus;
usb_stor_dbg(us, "Entering isd200_IssueATAReadRegs\n");
transferStatus = isd200_action( us, ACTION_READ_STATUS,
info->RegsBuf, sizeof(info->ATARegs) );
if (transferStatus != ISD200_TRANSPORT_GOOD) {
usb_stor_dbg(us, " Error reading ATA registers\n");
retStatus = ISD200_ERROR;
} else {
memcpy(info->ATARegs, info->RegsBuf, sizeof(info->ATARegs));
usb_stor_dbg(us, " Got ATA Register[ATA_REG_ERROR_OFFSET] = 0x%x\n",
info->ATARegs[ATA_REG_ERROR_OFFSET]);
}
return retStatus;
}
/**************************************************************************
* Invoke the transport and basic error-handling/recovery methods
*
* This is used by the protocol layers to actually send the message to
* the device and receive the response.
*/
static void isd200_invoke_transport( struct us_data *us,
struct scsi_cmnd *srb,
union ata_cdb *ataCdb )
{
int need_auto_sense = 0;
int transferStatus;
int result;
/* send the command to the transport layer */
memcpy(srb->cmnd, ataCdb, sizeof(ataCdb->generic));
srb->cmd_len = sizeof(ataCdb->generic);
transferStatus = usb_stor_Bulk_transport(srb, us);
/*
* if the command gets aborted by the higher layers, we need to
* short-circuit all other processing
*/
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
usb_stor_dbg(us, "-- command was aborted\n");
goto Handle_Abort;
}
switch (transferStatus) {
case USB_STOR_TRANSPORT_GOOD:
/* Indicate a good result */
srb->result = SAM_STAT_GOOD;
break;
case USB_STOR_TRANSPORT_NO_SENSE:
usb_stor_dbg(us, "-- transport indicates protocol failure\n");
srb->result = SAM_STAT_CHECK_CONDITION;
return;
case USB_STOR_TRANSPORT_FAILED:
usb_stor_dbg(us, "-- transport indicates command failure\n");
need_auto_sense = 1;
break;
case USB_STOR_TRANSPORT_ERROR:
usb_stor_dbg(us, "-- transport indicates transport error\n");
srb->result = DID_ERROR << 16;
/* Need reset here */
return;
default:
usb_stor_dbg(us, "-- transport indicates unknown error\n");
srb->result = DID_ERROR << 16;
/* Need reset here */
return;
}
if ((scsi_get_resid(srb) > 0) &&
!((srb->cmnd[0] == REQUEST_SENSE) ||
(srb->cmnd[0] == INQUIRY) ||
(srb->cmnd[0] == MODE_SENSE) ||
(srb->cmnd[0] == LOG_SENSE) ||
(srb->cmnd[0] == MODE_SENSE_10))) {
usb_stor_dbg(us, "-- unexpectedly short transfer\n");
need_auto_sense = 1;
}
if (need_auto_sense) {
result = isd200_read_regs(us);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
usb_stor_dbg(us, "-- auto-sense aborted\n");
goto Handle_Abort;
}
if (result == ISD200_GOOD) {
isd200_build_sense(us, srb);
srb->result = SAM_STAT_CHECK_CONDITION;
/* If things are really okay, then let's show that */
if ((srb->sense_buffer[2] & 0xf) == 0x0)
srb->result = SAM_STAT_GOOD;
} else {
srb->result = DID_ERROR << 16;
/* Need reset here */
}
}
/*
* Regardless of auto-sense, if we _know_ we have an error
* condition, show that in the result code
*/
if (transferStatus == USB_STOR_TRANSPORT_FAILED)
srb->result = SAM_STAT_CHECK_CONDITION;
return;
/*
* abort processing: the bulk-only transport requires a reset
* following an abort
*/
Handle_Abort:
srb->result = DID_ABORT << 16;
/* permit the reset transfer to take place */
clear_bit(US_FLIDX_ABORTING, &us->dflags);
/* Need reset here */
}
#ifdef CONFIG_USB_STORAGE_DEBUG
static void isd200_log_config(struct us_data *us, struct isd200_info *info)
{
usb_stor_dbg(us, " Event Notification: 0x%x\n",
info->ConfigData.EventNotification);
usb_stor_dbg(us, " External Clock: 0x%x\n",
info->ConfigData.ExternalClock);
usb_stor_dbg(us, " ATA Init Timeout: 0x%x\n",
info->ConfigData.ATAInitTimeout);
usb_stor_dbg(us, " ATAPI Command Block Size: 0x%x\n",
(info->ConfigData.ATAConfig & ATACFG_BLOCKSIZE) >> 6);
usb_stor_dbg(us, " Master/Slave Selection: 0x%x\n",
info->ConfigData.ATAConfig & ATACFG_MASTER);
usb_stor_dbg(us, " ATAPI Reset: 0x%x\n",
info->ConfigData.ATAConfig & ATACFG_ATAPI_RESET);
usb_stor_dbg(us, " ATA Timing: 0x%x\n",
info->ConfigData.ATAConfig & ATACFG_TIMING);
usb_stor_dbg(us, " ATA Major Command: 0x%x\n",
info->ConfigData.ATAMajorCommand);
usb_stor_dbg(us, " ATA Minor Command: 0x%x\n",
info->ConfigData.ATAMinorCommand);
usb_stor_dbg(us, " Init Status: 0x%x\n",
info->ConfigData.ATAExtraConfig & ATACFGE_INIT_STATUS);
usb_stor_dbg(us, " Config Descriptor 2: 0x%x\n",
info->ConfigData.ATAExtraConfig & ATACFGE_CONF_DESC2);
usb_stor_dbg(us, " Skip Device Boot: 0x%x\n",
info->ConfigData.ATAExtraConfig & ATACFGE_SKIP_BOOT);
usb_stor_dbg(us, " ATA 3 State Suspend: 0x%x\n",
info->ConfigData.ATAExtraConfig & ATACFGE_STATE_SUSPEND);
usb_stor_dbg(us, " Descriptor Override: 0x%x\n",
info->ConfigData.ATAExtraConfig & ATACFGE_DESC_OVERRIDE);
usb_stor_dbg(us, " Last LUN Identifier: 0x%x\n",
info->ConfigData.ATAExtraConfig & ATACFGE_LAST_LUN);
usb_stor_dbg(us, " SRST Enable: 0x%x\n",
info->ConfigData.ATAExtraConfig & CFG_CAPABILITY_SRST);
}
#endif
/**************************************************************************
* isd200_write_config
*
* Write the ISD200 Configuration data
*
* RETURNS:
* ISD status code
*/
static int isd200_write_config( struct us_data *us )
{
struct isd200_info *info = (struct isd200_info *)us->extra;
int retStatus = ISD200_GOOD;
int result;
#ifdef CONFIG_USB_STORAGE_DEBUG
usb_stor_dbg(us, "Entering isd200_write_config\n");
usb_stor_dbg(us, " Writing the following ISD200 Config Data:\n");
isd200_log_config(us, info);
#endif
/* let's send the command via the control pipe */
result = usb_stor_ctrl_transfer(
us,
us->send_ctrl_pipe,
0x01,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
0x0000,
0x0002,
(void *) &info->ConfigData,
sizeof(info->ConfigData));
if (result >= 0) {
usb_stor_dbg(us, " ISD200 Config Data was written successfully\n");
} else {
usb_stor_dbg(us, " Request to write ISD200 Config Data failed!\n");
retStatus = ISD200_ERROR;
}
usb_stor_dbg(us, "Leaving isd200_write_config %08X\n", retStatus);
return retStatus;
}
/**************************************************************************
* isd200_read_config
*
* Reads the ISD200 Configuration data
*
* RETURNS:
* ISD status code
*/
static int isd200_read_config( struct us_data *us )
{
struct isd200_info *info = (struct isd200_info *)us->extra;
int retStatus = ISD200_GOOD;
int result;
usb_stor_dbg(us, "Entering isd200_read_config\n");
/* read the configuration information from ISD200. Use this to */
/* determine what the special ATA CDB bytes are. */
result = usb_stor_ctrl_transfer(
us,
us->recv_ctrl_pipe,
0x02,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
0x0000,
0x0002,
(void *) &info->ConfigData,
sizeof(info->ConfigData));
if (result >= 0) {
usb_stor_dbg(us, " Retrieved the following ISD200 Config Data:\n");
#ifdef CONFIG_USB_STORAGE_DEBUG
isd200_log_config(us, info);
#endif
} else {
usb_stor_dbg(us, " Request to get ISD200 Config Data failed!\n");
retStatus = ISD200_ERROR;
}
usb_stor_dbg(us, "Leaving isd200_read_config %08X\n", retStatus);
return retStatus;
}
/**************************************************************************
* isd200_atapi_soft_reset
*
* Perform an Atapi Soft Reset on the device
*
* RETURNS:
* NT status code
*/
static int isd200_atapi_soft_reset( struct us_data *us )
{
int retStatus = ISD200_GOOD;
int transferStatus;
usb_stor_dbg(us, "Entering isd200_atapi_soft_reset\n");
transferStatus = isd200_action( us, ACTION_SOFT_RESET, NULL, 0 );
if (transferStatus != ISD200_TRANSPORT_GOOD) {
usb_stor_dbg(us, " Error issuing Atapi Soft Reset\n");
retStatus = ISD200_ERROR;
}
usb_stor_dbg(us, "Leaving isd200_atapi_soft_reset %08X\n", retStatus);
return retStatus;
}
/**************************************************************************
* isd200_srst
*
* Perform an SRST on the device
*
* RETURNS:
* ISD status code
*/
static int isd200_srst( struct us_data *us )
{
int retStatus = ISD200_GOOD;
int transferStatus;
usb_stor_dbg(us, "Entering isd200_SRST\n");
transferStatus = isd200_action( us, ACTION_RESET, NULL, 0 );
/* check to see if this request failed */
if (transferStatus != ISD200_TRANSPORT_GOOD) {
usb_stor_dbg(us, " Error issuing SRST\n");
retStatus = ISD200_ERROR;
} else {
/* delay 10ms to give the drive a chance to see it */
msleep(10);
transferStatus = isd200_action( us, ACTION_REENABLE, NULL, 0 );
if (transferStatus != ISD200_TRANSPORT_GOOD) {
usb_stor_dbg(us, " Error taking drive out of reset\n");
retStatus = ISD200_ERROR;
} else {
/* delay 50ms to give the drive a chance to recover after SRST */
msleep(50);
}
}
usb_stor_dbg(us, "Leaving isd200_srst %08X\n", retStatus);
return retStatus;
}
/**************************************************************************
* isd200_try_enum
*
* Helper function for isd200_manual_enum(). Does ENUM and READ_STATUS
* and tries to analyze the status registers
*
* RETURNS:
* ISD status code
*/
static int isd200_try_enum(struct us_data *us, unsigned char master_slave,
int detect )
{
int status = ISD200_GOOD;
unsigned long endTime;
struct isd200_info *info = (struct isd200_info *)us->extra;
unsigned char *regs = info->RegsBuf;
int recheckAsMaster = 0;
if ( detect )
endTime = jiffies + ISD200_ENUM_DETECT_TIMEOUT * HZ;
else
endTime = jiffies + ISD200_ENUM_BSY_TIMEOUT * HZ;
/* loop until we detect !BSY or timeout */
while(1) {
status = isd200_action( us, ACTION_ENUM, NULL, master_slave );
if ( status != ISD200_GOOD )
break;
status = isd200_action( us, ACTION_READ_STATUS,
regs, 8 );
if ( status != ISD200_GOOD )
break;
if (!detect) {
if (regs[ATA_REG_STATUS_OFFSET] & ATA_BUSY) {
usb_stor_dbg(us, " %s status is still BSY, try again...\n",
master_slave == ATA_ADDRESS_DEVHEAD_STD ?
"Master" : "Slave");
} else {
usb_stor_dbg(us, " %s status !BSY, continue with next operation\n",
master_slave == ATA_ADDRESS_DEVHEAD_STD ?
"Master" : "Slave");
break;
}
}
/* check for ATA_BUSY and */
/* ATA_DF (workaround ATA Zip drive) and */
/* ATA_ERR (workaround for Archos CD-ROM) */
else if (regs[ATA_REG_STATUS_OFFSET] &
(ATA_BUSY | ATA_DF | ATA_ERR)) {
usb_stor_dbg(us, " Status indicates it is not ready, try again...\n");
}
/* check for DRDY, ATA devices set DRDY after SRST */
else if (regs[ATA_REG_STATUS_OFFSET] & ATA_DRDY) {
usb_stor_dbg(us, " Identified ATA device\n");
info->DeviceFlags |= DF_ATA_DEVICE;
info->DeviceHead = master_slave;
break;
}
/*
* check Cylinder High/Low to
* determine if it is an ATAPI device
*/
else if (regs[ATA_REG_HCYL_OFFSET] == 0xEB &&
regs[ATA_REG_LCYL_OFFSET] == 0x14) {
/*
* It seems that the RICOH
* MP6200A CD/RW drive will
* report itself okay as a
* slave when it is really a
* master. So this check again
* as a master device just to
* make sure it doesn't report
* itself okay as a master also
*/
if ((master_slave & ATA_ADDRESS_DEVHEAD_SLAVE) &&
!recheckAsMaster) {
usb_stor_dbg(us, " Identified ATAPI device as slave. Rechecking again as master\n");
recheckAsMaster = 1;
master_slave = ATA_ADDRESS_DEVHEAD_STD;
} else {
usb_stor_dbg(us, " Identified ATAPI device\n");
info->DeviceHead = master_slave;
status = isd200_atapi_soft_reset(us);
break;
}
} else {
usb_stor_dbg(us, " Not ATA, not ATAPI - Weird\n");
break;
}
/* check for timeout on this request */
if (time_after_eq(jiffies, endTime)) {
if (!detect)
usb_stor_dbg(us, " BSY check timeout, just continue with next operation...\n");
else
usb_stor_dbg(us, " Device detect timeout!\n");
break;
}
}
return status;
}
/**************************************************************************
* isd200_manual_enum
*
* Determines if the drive attached is an ATA or ATAPI and if it is a
* master or slave.
*
* RETURNS:
* ISD status code
*/
static int isd200_manual_enum(struct us_data *us)
{
struct isd200_info *info = (struct isd200_info *)us->extra;
int retStatus = ISD200_GOOD;
usb_stor_dbg(us, "Entering isd200_manual_enum\n");
retStatus = isd200_read_config(us);
if (retStatus == ISD200_GOOD) {
int isslave;
/* master or slave? */
retStatus = isd200_try_enum( us, ATA_ADDRESS_DEVHEAD_STD, 0);
if (retStatus == ISD200_GOOD)
retStatus = isd200_try_enum( us, ATA_ADDRESS_DEVHEAD_SLAVE, 0);
if (retStatus == ISD200_GOOD) {
retStatus = isd200_srst(us);
if (retStatus == ISD200_GOOD)
/* ata or atapi? */
retStatus = isd200_try_enum( us, ATA_ADDRESS_DEVHEAD_STD, 1);
}
isslave = (info->DeviceHead & ATA_ADDRESS_DEVHEAD_SLAVE) ? 1 : 0;
if (!(info->ConfigData.ATAConfig & ATACFG_MASTER)) {
usb_stor_dbg(us, " Setting Master/Slave selection to %d\n",
isslave);
info->ConfigData.ATAConfig &= 0x3f;
info->ConfigData.ATAConfig |= (isslave<<6);
retStatus = isd200_write_config(us);
}
}
usb_stor_dbg(us, "Leaving isd200_manual_enum %08X\n", retStatus);
return(retStatus);
}
static void isd200_fix_driveid(u16 *id)
{
#ifndef __LITTLE_ENDIAN
# ifdef __BIG_ENDIAN
int i;
for (i = 0; i < ATA_ID_WORDS; i++)
id[i] = __le16_to_cpu(id[i]);
# else
# error "Please fix <asm/byteorder.h>"
# endif
#endif
}
static void isd200_dump_driveid(struct us_data *us, u16 *id)
{
usb_stor_dbg(us, " Identify Data Structure:\n");
usb_stor_dbg(us, " config = 0x%x\n", id[ATA_ID_CONFIG]);
usb_stor_dbg(us, " cyls = 0x%x\n", id[ATA_ID_CYLS]);
usb_stor_dbg(us, " heads = 0x%x\n", id[ATA_ID_HEADS]);
usb_stor_dbg(us, " track_bytes = 0x%x\n", id[4]);
usb_stor_dbg(us, " sector_bytes = 0x%x\n", id[5]);
usb_stor_dbg(us, " sectors = 0x%x\n", id[ATA_ID_SECTORS]);
usb_stor_dbg(us, " serial_no[0] = 0x%x\n", *(char *)&id[ATA_ID_SERNO]);
usb_stor_dbg(us, " buf_type = 0x%x\n", id[20]);
usb_stor_dbg(us, " buf_size = 0x%x\n", id[ATA_ID_BUF_SIZE]);
usb_stor_dbg(us, " ecc_bytes = 0x%x\n", id[22]);
usb_stor_dbg(us, " fw_rev[0] = 0x%x\n", *(char *)&id[ATA_ID_FW_REV]);
usb_stor_dbg(us, " model[0] = 0x%x\n", *(char *)&id[ATA_ID_PROD]);
usb_stor_dbg(us, " max_multsect = 0x%x\n", id[ATA_ID_MAX_MULTSECT] & 0xff);
usb_stor_dbg(us, " dword_io = 0x%x\n", id[ATA_ID_DWORD_IO]);
usb_stor_dbg(us, " capability = 0x%x\n", id[ATA_ID_CAPABILITY] >> 8);
usb_stor_dbg(us, " tPIO = 0x%x\n", id[ATA_ID_OLD_PIO_MODES] >> 8);
usb_stor_dbg(us, " tDMA = 0x%x\n", id[ATA_ID_OLD_DMA_MODES] >> 8);
usb_stor_dbg(us, " field_valid = 0x%x\n", id[ATA_ID_FIELD_VALID]);
usb_stor_dbg(us, " cur_cyls = 0x%x\n", id[ATA_ID_CUR_CYLS]);
usb_stor_dbg(us, " cur_heads = 0x%x\n", id[ATA_ID_CUR_HEADS]);
usb_stor_dbg(us, " cur_sectors = 0x%x\n", id[ATA_ID_CUR_SECTORS]);
usb_stor_dbg(us, " cur_capacity = 0x%x\n", ata_id_u32(id, 57));
usb_stor_dbg(us, " multsect = 0x%x\n", id[ATA_ID_MULTSECT] & 0xff);
usb_stor_dbg(us, " lba_capacity = 0x%x\n", ata_id_u32(id, ATA_ID_LBA_CAPACITY));
usb_stor_dbg(us, " command_set_1 = 0x%x\n", id[ATA_ID_COMMAND_SET_1]);
usb_stor_dbg(us, " command_set_2 = 0x%x\n", id[ATA_ID_COMMAND_SET_2]);
}
/**************************************************************************
* isd200_get_inquiry_data
*
* Get inquiry data
*
* RETURNS:
* ISD status code
*/
static int isd200_get_inquiry_data( struct us_data *us )
{
struct isd200_info *info = (struct isd200_info *)us->extra;
int retStatus = ISD200_GOOD;
u16 *id = info->id;
usb_stor_dbg(us, "Entering isd200_get_inquiry_data\n");
/* set default to Master */
info->DeviceHead = ATA_ADDRESS_DEVHEAD_STD;
/* attempt to manually enumerate this device */
retStatus = isd200_manual_enum(us);
if (retStatus == ISD200_GOOD) {
int transferStatus;
/* check for an ATA device */
if (info->DeviceFlags & DF_ATA_DEVICE) {
/* this must be an ATA device */
/* perform an ATA Command Identify */
transferStatus = isd200_action( us, ACTION_IDENTIFY,
id, ATA_ID_WORDS * 2);
if (transferStatus != ISD200_TRANSPORT_GOOD) {
/* Error issuing ATA Command Identify */
usb_stor_dbg(us, " Error issuing ATA Command Identify\n");
retStatus = ISD200_ERROR;
} else {
/* ATA Command Identify successful */
int i;
__be16 *src;
__u16 *dest;
isd200_fix_driveid(id);
isd200_dump_driveid(us, id);
memset(&info->InquiryData, 0, sizeof(info->InquiryData));
/* Standard IDE interface only supports disks */
info->InquiryData.DeviceType = DIRECT_ACCESS_DEVICE;
/* The length must be at least 36 (5 + 31) */
info->InquiryData.AdditionalLength = 0x1F;
if (id[ATA_ID_COMMAND_SET_1] & COMMANDSET_MEDIA_STATUS) {
/* set the removable bit */
info->InquiryData.DeviceTypeModifier = DEVICE_REMOVABLE;
info->DeviceFlags |= DF_REMOVABLE_MEDIA;
}
/* Fill in vendor identification fields */
src = (__be16 *)&id[ATA_ID_PROD];
dest = (__u16*)info->InquiryData.VendorId;
for (i=0;i<4;i++)
dest[i] = be16_to_cpu(src[i]);
src = (__be16 *)&id[ATA_ID_PROD + 8/2];
dest = (__u16*)info->InquiryData.ProductId;
for (i=0;i<8;i++)
dest[i] = be16_to_cpu(src[i]);
src = (__be16 *)&id[ATA_ID_FW_REV];
dest = (__u16*)info->InquiryData.ProductRevisionLevel;
for (i=0;i<2;i++)
dest[i] = be16_to_cpu(src[i]);
/* determine if it supports Media Status Notification */
if (id[ATA_ID_COMMAND_SET_2] & COMMANDSET_MEDIA_STATUS) {
usb_stor_dbg(us, " Device supports Media Status Notification\n");
/*
* Indicate that it is enabled, even
* though it is not.
* This allows the lock/unlock of the
* media to work correctly.
*/
info->DeviceFlags |= DF_MEDIA_STATUS_ENABLED;
}
else
info->DeviceFlags &= ~DF_MEDIA_STATUS_ENABLED;
}
} else {
/*
* this must be an ATAPI device
* use an ATAPI protocol (Transparent SCSI)
*/
us->protocol_name = "Transparent SCSI";
us->proto_handler = usb_stor_transparent_scsi_command;
usb_stor_dbg(us, "Protocol changed to: %s\n",
us->protocol_name);
/* Free driver structure */
us->extra_destructor(info);
kfree(info);
us->extra = NULL;
us->extra_destructor = NULL;
}
}
usb_stor_dbg(us, "Leaving isd200_get_inquiry_data %08X\n", retStatus);
return(retStatus);
}
/**************************************************************************
* isd200_scsi_to_ata
*
* Translate SCSI commands to ATA commands.
*
* RETURNS:
* 1 if the command needs to be sent to the transport layer
* 0 otherwise
*/
static int isd200_scsi_to_ata(struct scsi_cmnd *srb, struct us_data *us,
union ata_cdb * ataCdb)
{
struct isd200_info *info = (struct isd200_info *)us->extra;
u16 *id = info->id;
int sendToTransport = 1;
unsigned char sectnum, head;
unsigned short cylinder;
unsigned long lba;
unsigned long blockCount;
unsigned char senseData[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
memset(ataCdb, 0, sizeof(union ata_cdb));
/* SCSI Command */
switch (srb->cmnd[0]) {
case INQUIRY:
usb_stor_dbg(us, " ATA OUT - INQUIRY\n");
/* copy InquiryData */
usb_stor_set_xfer_buf((unsigned char *) &info->InquiryData,
sizeof(info->InquiryData), srb);
srb->result = SAM_STAT_GOOD;
sendToTransport = 0;
break;
case MODE_SENSE:
usb_stor_dbg(us, " ATA OUT - SCSIOP_MODE_SENSE\n");
/* Initialize the return buffer */
usb_stor_set_xfer_buf(senseData, sizeof(senseData), srb);
if (info->DeviceFlags & DF_MEDIA_STATUS_ENABLED)
{
ataCdb->generic.SignatureByte0 = info->ConfigData.ATAMajorCommand;
ataCdb->generic.SignatureByte1 = info->ConfigData.ATAMinorCommand;
ataCdb->generic.TransferBlockSize = 1;
ataCdb->generic.RegisterSelect = REG_COMMAND;
ataCdb->write.CommandByte = ATA_COMMAND_GET_MEDIA_STATUS;
isd200_srb_set_bufflen(srb, 0);
} else {
usb_stor_dbg(us, " Media Status not supported, just report okay\n");
srb->result = SAM_STAT_GOOD;
sendToTransport = 0;
}
break;
case TEST_UNIT_READY:
usb_stor_dbg(us, " ATA OUT - SCSIOP_TEST_UNIT_READY\n");
if (info->DeviceFlags & DF_MEDIA_STATUS_ENABLED)
{
ataCdb->generic.SignatureByte0 = info->ConfigData.ATAMajorCommand;
ataCdb->generic.SignatureByte1 = info->ConfigData.ATAMinorCommand;
ataCdb->generic.TransferBlockSize = 1;
ataCdb->generic.RegisterSelect = REG_COMMAND;
ataCdb->write.CommandByte = ATA_COMMAND_GET_MEDIA_STATUS;
isd200_srb_set_bufflen(srb, 0);
} else {
usb_stor_dbg(us, " Media Status not supported, just report okay\n");
srb->result = SAM_STAT_GOOD;
sendToTransport = 0;
}
break;
case READ_CAPACITY:
{
unsigned long capacity;
struct read_capacity_data readCapacityData;
usb_stor_dbg(us, " ATA OUT - SCSIOP_READ_CAPACITY\n");
if (ata_id_has_lba(id))
capacity = ata_id_u32(id, ATA_ID_LBA_CAPACITY) - 1;
else
capacity = (id[ATA_ID_HEADS] * id[ATA_ID_CYLS] *
id[ATA_ID_SECTORS]) - 1;
readCapacityData.LogicalBlockAddress = cpu_to_be32(capacity);
readCapacityData.BytesPerBlock = cpu_to_be32(0x200);
usb_stor_set_xfer_buf((unsigned char *) &readCapacityData,
sizeof(readCapacityData), srb);
srb->result = SAM_STAT_GOOD;
sendToTransport = 0;
}
break;
case READ_10:
usb_stor_dbg(us, " ATA OUT - SCSIOP_READ\n");
lba = be32_to_cpu(*(__be32 *)&srb->cmnd[2]);
blockCount = (unsigned long)srb->cmnd[7]<<8 | (unsigned long)srb->cmnd[8];
if (ata_id_has_lba(id)) {
sectnum = (unsigned char)(lba);
cylinder = (unsigned short)(lba>>8);
head = ATA_ADDRESS_DEVHEAD_LBA_MODE | (unsigned char)(lba>>24 & 0x0F);
} else {
sectnum = (u8)((lba % id[ATA_ID_SECTORS]) + 1);
cylinder = (u16)(lba / (id[ATA_ID_SECTORS] *
id[ATA_ID_HEADS]));
head = (u8)((lba / id[ATA_ID_SECTORS]) %
id[ATA_ID_HEADS]);
}
ataCdb->generic.SignatureByte0 = info->ConfigData.ATAMajorCommand;
ataCdb->generic.SignatureByte1 = info->ConfigData.ATAMinorCommand;
ataCdb->generic.TransferBlockSize = 1;
ataCdb->generic.RegisterSelect =
REG_SECTOR_COUNT | REG_SECTOR_NUMBER |
REG_CYLINDER_LOW | REG_CYLINDER_HIGH |
REG_DEVICE_HEAD | REG_COMMAND;
ataCdb->write.SectorCountByte = (unsigned char)blockCount;
ataCdb->write.SectorNumberByte = sectnum;
ataCdb->write.CylinderHighByte = (unsigned char)(cylinder>>8);
ataCdb->write.CylinderLowByte = (unsigned char)cylinder;
ataCdb->write.DeviceHeadByte = (head | ATA_ADDRESS_DEVHEAD_STD);
ataCdb->write.CommandByte = ATA_CMD_PIO_READ;
break;
case WRITE_10:
usb_stor_dbg(us, " ATA OUT - SCSIOP_WRITE\n");
lba = be32_to_cpu(*(__be32 *)&srb->cmnd[2]);
blockCount = (unsigned long)srb->cmnd[7]<<8 | (unsigned long)srb->cmnd[8];
if (ata_id_has_lba(id)) {
sectnum = (unsigned char)(lba);
cylinder = (unsigned short)(lba>>8);
head = ATA_ADDRESS_DEVHEAD_LBA_MODE | (unsigned char)(lba>>24 & 0x0F);
} else {
sectnum = (u8)((lba % id[ATA_ID_SECTORS]) + 1);
cylinder = (u16)(lba / (id[ATA_ID_SECTORS] *
id[ATA_ID_HEADS]));
head = (u8)((lba / id[ATA_ID_SECTORS]) %
id[ATA_ID_HEADS]);
}
ataCdb->generic.SignatureByte0 = info->ConfigData.ATAMajorCommand;
ataCdb->generic.SignatureByte1 = info->ConfigData.ATAMinorCommand;
ataCdb->generic.TransferBlockSize = 1;
ataCdb->generic.RegisterSelect =
REG_SECTOR_COUNT | REG_SECTOR_NUMBER |
REG_CYLINDER_LOW | REG_CYLINDER_HIGH |
REG_DEVICE_HEAD | REG_COMMAND;
ataCdb->write.SectorCountByte = (unsigned char)blockCount;
ataCdb->write.SectorNumberByte = sectnum;
ataCdb->write.CylinderHighByte = (unsigned char)(cylinder>>8);
ataCdb->write.CylinderLowByte = (unsigned char)cylinder;
ataCdb->write.DeviceHeadByte = (head | ATA_ADDRESS_DEVHEAD_STD);
ataCdb->write.CommandByte = ATA_CMD_PIO_WRITE;
break;
case ALLOW_MEDIUM_REMOVAL:
usb_stor_dbg(us, " ATA OUT - SCSIOP_MEDIUM_REMOVAL\n");
if (info->DeviceFlags & DF_REMOVABLE_MEDIA) {
usb_stor_dbg(us, " srb->cmnd[4] = 0x%X\n",
srb->cmnd[4]);
ataCdb->generic.SignatureByte0 = info->ConfigData.ATAMajorCommand;
ataCdb->generic.SignatureByte1 = info->ConfigData.ATAMinorCommand;
ataCdb->generic.TransferBlockSize = 1;
ataCdb->generic.RegisterSelect = REG_COMMAND;
ataCdb->write.CommandByte = (srb->cmnd[4] & 0x1) ?
ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
isd200_srb_set_bufflen(srb, 0);
} else {
usb_stor_dbg(us, " Not removeable media, just report okay\n");
srb->result = SAM_STAT_GOOD;
sendToTransport = 0;
}
break;
case START_STOP:
usb_stor_dbg(us, " ATA OUT - SCSIOP_START_STOP_UNIT\n");
usb_stor_dbg(us, " srb->cmnd[4] = 0x%X\n", srb->cmnd[4]);
if ((srb->cmnd[4] & 0x3) == 0x2) {
usb_stor_dbg(us, " Media Eject\n");
ataCdb->generic.SignatureByte0 = info->ConfigData.ATAMajorCommand;
ataCdb->generic.SignatureByte1 = info->ConfigData.ATAMinorCommand;
ataCdb->generic.TransferBlockSize = 0;
ataCdb->generic.RegisterSelect = REG_COMMAND;
ataCdb->write.CommandByte = ATA_COMMAND_MEDIA_EJECT;
} else if ((srb->cmnd[4] & 0x3) == 0x1) {
usb_stor_dbg(us, " Get Media Status\n");
ataCdb->generic.SignatureByte0 = info->ConfigData.ATAMajorCommand;
ataCdb->generic.SignatureByte1 = info->ConfigData.ATAMinorCommand;
ataCdb->generic.TransferBlockSize = 1;
ataCdb->generic.RegisterSelect = REG_COMMAND;
ataCdb->write.CommandByte = ATA_COMMAND_GET_MEDIA_STATUS;
isd200_srb_set_bufflen(srb, 0);
} else {
usb_stor_dbg(us, " Nothing to do, just report okay\n");
srb->result = SAM_STAT_GOOD;
sendToTransport = 0;
}
break;
default:
usb_stor_dbg(us, "Unsupported SCSI command - 0x%X\n",
srb->cmnd[0]);
srb->result = DID_ERROR << 16;
sendToTransport = 0;
break;
}
return(sendToTransport);
}
/**************************************************************************
* isd200_free_info
*
* Frees the driver structure.
*/
static void isd200_free_info_ptrs(void *info_)
{
struct isd200_info *info = (struct isd200_info *) info_;
if (info) {
kfree(info->id);
kfree(info->RegsBuf);
kfree(info->srb.sense_buffer);
}
}
/**************************************************************************
* isd200_init_info
*
* Allocates (if necessary) and initializes the driver structure.
*
* RETURNS:
* ISD status code
*/
static int isd200_init_info(struct us_data *us)
{
struct isd200_info *info;
info = kzalloc(sizeof(struct isd200_info), GFP_KERNEL);
if (!info)
return ISD200_ERROR;
info->id = kzalloc(ATA_ID_WORDS * 2, GFP_KERNEL);
info->RegsBuf = kmalloc(sizeof(info->ATARegs), GFP_KERNEL);
info->srb.sense_buffer = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
if (!info->id || !info->RegsBuf || !info->srb.sense_buffer) {
isd200_free_info_ptrs(info);
kfree(info);
return ISD200_ERROR;
}
us->extra = info;
us->extra_destructor = isd200_free_info_ptrs;
return ISD200_GOOD;
}
/**************************************************************************
* Initialization for the ISD200
*/
static int isd200_Initialization(struct us_data *us)
{
usb_stor_dbg(us, "ISD200 Initialization...\n");
/* Initialize ISD200 info struct */
if (isd200_init_info(us) == ISD200_ERROR) {
usb_stor_dbg(us, "ERROR Initializing ISD200 Info struct\n");
} else {
/* Get device specific data */
if (isd200_get_inquiry_data(us) != ISD200_GOOD)
usb_stor_dbg(us, "ISD200 Initialization Failure\n");
else
usb_stor_dbg(us, "ISD200 Initialization complete\n");
}
return 0;
}
/**************************************************************************
* Protocol and Transport for the ISD200 ASIC
*
* This protocol and transport are for ATA devices connected to an ISD200
* ASIC. An ATAPI device that is connected as a slave device will be
* detected in the driver initialization function and the protocol will
* be changed to an ATAPI protocol (Transparent SCSI).
*
*/
static void isd200_ata_command(struct scsi_cmnd *srb, struct us_data *us)
{
int sendToTransport = 1, orig_bufflen;
union ata_cdb ataCdb;
/* Make sure driver was initialized */
if (us->extra == NULL) {
usb_stor_dbg(us, "ERROR Driver not initialized\n");
srb->result = DID_ERROR << 16;
return;
}
scsi_set_resid(srb, 0);
/* scsi_bufflen might change in protocol translation to ata */
orig_bufflen = scsi_bufflen(srb);
sendToTransport = isd200_scsi_to_ata(srb, us, &ataCdb);
/* send the command to the transport layer */
if (sendToTransport)
isd200_invoke_transport(us, srb, &ataCdb);
isd200_srb_set_bufflen(srb, orig_bufflen);
}
static struct scsi_host_template isd200_host_template;
static int isd200_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct us_data *us;
int result;
result = usb_stor_probe1(&us, intf, id,
(id - isd200_usb_ids) + isd200_unusual_dev_list,
&isd200_host_template);
if (result)
return result;
us->protocol_name = "ISD200 ATA/ATAPI";
us->proto_handler = isd200_ata_command;
result = usb_stor_probe2(us);
return result;
}
static struct usb_driver isd200_driver = {
.name = DRV_NAME,
.probe = isd200_probe,
.disconnect = usb_stor_disconnect,
.suspend = usb_stor_suspend,
.resume = usb_stor_resume,
.reset_resume = usb_stor_reset_resume,
.pre_reset = usb_stor_pre_reset,
.post_reset = usb_stor_post_reset,
.id_table = isd200_usb_ids,
.soft_unbind = 1,
.no_dynamic_id = 1,
};
module_usb_stor_driver(isd200_driver, isd200_host_template, DRV_NAME);
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