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linux/drivers/usb/storage/shuttle_usbat.c

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/* Driver for SCM Microsystems USB-ATAPI cable
*
* $Id: shuttle_usbat.c,v 1.17 2002/04/22 03:39:43 mdharm Exp $
*
* Current development and maintenance by:
* (c) 2000, 2001 Robert Baruch (autophile@starband.net)
* (c) 2004, 2005 Daniel Drake <dsd@gentoo.org>
*
* Developed with the assistance of:
* (c) 2002 Alan Stern <stern@rowland.org>
*
* Flash support based on earlier work by:
* (c) 2002 Thomas Kreiling <usbdev@sm04.de>
*
* Many originally ATAPI devices were slightly modified to meet the USB
* market by using some kind of translation from ATAPI to USB on the host,
* and the peripheral would translate from USB back to ATAPI.
*
* SCM Microsystems (www.scmmicro.com) makes a device, sold to OEM's only,
* which does the USB-to-ATAPI conversion. By obtaining the data sheet on
* their device under nondisclosure agreement, I have been able to write
* this driver for Linux.
*
* The chip used in the device can also be used for EPP and ISA translation
* as well. This driver is only guaranteed to work with the ATAPI
* translation.
*
* See the Kconfig help text for a list of devices known to be supported by
* this driver.
*
* 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.
*/
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/cdrom.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include "usb.h"
#include "transport.h"
#include "protocol.h"
#include "debug.h"
#include "shuttle_usbat.h"
#define short_pack(LSB,MSB) ( ((u16)(LSB)) | ( ((u16)(MSB))<<8 ) )
#define LSB_of(s) ((s)&0xFF)
#define MSB_of(s) ((s)>>8)
static int transferred = 0;
static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us);
static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us);
/*
* Convenience function to produce an ATAPI read/write sectors command
* Use cmd=0x20 for read, cmd=0x30 for write
*/
static void usbat_pack_atapi_sector_cmd(unsigned char *buf,
unsigned char thistime,
u32 sector, unsigned char cmd)
{
buf[0] = 0;
buf[1] = thistime;
buf[2] = sector & 0xFF;
buf[3] = (sector >> 8) & 0xFF;
buf[4] = (sector >> 16) & 0xFF;
buf[5] = 0xE0 | ((sector >> 24) & 0x0F);
buf[6] = cmd;
}
/*
* Convenience function to get the device type (flash or hp8200)
*/
static int usbat_get_device_type(struct us_data *us)
{
return ((struct usbat_info*)us->extra)->devicetype;
}
/*
* Read a register from the device
*/
static int usbat_read(struct us_data *us,
unsigned char access,
unsigned char reg,
unsigned char *content)
{
return usb_stor_ctrl_transfer(us,
us->recv_ctrl_pipe,
access | USBAT_CMD_READ_REG,
0xC0,
(u16)reg,
0,
content,
1);
}
/*
* Write to a register on the device
*/
static int usbat_write(struct us_data *us,
unsigned char access,
unsigned char reg,
unsigned char content)
{
return usb_stor_ctrl_transfer(us,
us->send_ctrl_pipe,
access | USBAT_CMD_WRITE_REG,
0x40,
short_pack(reg, content),
0,
NULL,
0);
}
/*
* Convenience function to perform a bulk read
*/
static int usbat_bulk_read(struct us_data *us,
unsigned char *data,
unsigned int len)
{
if (len == 0)
return USB_STOR_XFER_GOOD;
US_DEBUGP("usbat_bulk_read: len = %d\n", len);
return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, data, len, NULL);
}
/*
* Convenience function to perform a bulk write
*/
static int usbat_bulk_write(struct us_data *us,
unsigned char *data,
unsigned int len)
{
if (len == 0)
return USB_STOR_XFER_GOOD;
US_DEBUGP("usbat_bulk_write: len = %d\n", len);
return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, data, len, NULL);
}
/*
* Some USBAT-specific commands can only be executed over a command transport
* This transport allows one (len=8) or two (len=16) vendor-specific commands
* to be executed.
*/
static int usbat_execute_command(struct us_data *us,
unsigned char *commands,
unsigned int len)
{
return usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
USBAT_CMD_EXEC_CMD, 0x40, 0, 0,
commands, len);
}
/*
* Read the status register
*/
static int usbat_get_status(struct us_data *us, unsigned char *status)
{
int rc;
rc = usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status);
US_DEBUGP("usbat_get_status: 0x%02X\n", (unsigned short) (*status));
return rc;
}
/*
* Check the device status
*/
static int usbat_check_status(struct us_data *us)
{
unsigned char *reply = us->iobuf;
int rc;
if (!us)
return USB_STOR_TRANSPORT_ERROR;
rc = usbat_get_status(us, reply);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_FAILED;
if (*reply & 0x01 && *reply != 0x51) // error/check condition (0x51 is ok)
return USB_STOR_TRANSPORT_FAILED;
if (*reply & 0x20) // device fault
return USB_STOR_TRANSPORT_FAILED;
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Stores critical information in internal registers in prepartion for the execution
* of a conditional usbat_read_blocks or usbat_write_blocks call.
*/
static int usbat_set_shuttle_features(struct us_data *us,
unsigned char external_trigger,
unsigned char epp_control,
unsigned char mask_byte,
unsigned char test_pattern,
unsigned char subcountH,
unsigned char subcountL)
{
unsigned char *command = us->iobuf;
command[0] = 0x40;
command[1] = USBAT_CMD_SET_FEAT;
// The only bit relevant to ATA access is bit 6
// which defines 8 bit data access (set) or 16 bit (unset)
command[2] = epp_control;
// If FCQ is set in the qualifier (defined in R/W cmd), then bits U0, U1,
// ET1 and ET2 define an external event to be checked for on event of a
// _read_blocks or _write_blocks operation. The read/write will not take
// place unless the defined trigger signal is active.
command[3] = external_trigger;
// The resultant byte of the mask operation (see mask_byte) is compared for
// equivalence with this test pattern. If equal, the read/write will take
// place.
command[4] = test_pattern;
// This value is logically ANDed with the status register field specified
// in the read/write command.
command[5] = mask_byte;
// If ALQ is set in the qualifier, this field contains the address of the
// registers where the byte count should be read for transferring the data.
// If ALQ is not set, then this field contains the number of bytes to be
// transferred.
command[6] = subcountL;
command[7] = subcountH;
return usbat_execute_command(us, command, 8);
}
/*
* Block, waiting for an ATA device to become not busy or to report
* an error condition.
*/
static int usbat_wait_not_busy(struct us_data *us, int minutes)
{
int i;
int result;
unsigned char *status = us->iobuf;
/* Synchronizing cache on a CDR could take a heck of a long time,
* but probably not more than 10 minutes or so. On the other hand,
* doing a full blank on a CDRW at speed 1 will take about 75
* minutes!
*/
for (i=0; i<1200+minutes*60; i++) {
result = usbat_get_status(us, status);
if (result!=USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (*status & 0x01) { // check condition
result = usbat_read(us, USBAT_ATA, 0x10, status);
return USB_STOR_TRANSPORT_FAILED;
}
if (*status & 0x20) // device fault
return USB_STOR_TRANSPORT_FAILED;
if ((*status & 0x80)==0x00) { // not busy
US_DEBUGP("Waited not busy for %d steps\n", i);
return USB_STOR_TRANSPORT_GOOD;
}
if (i<500)
msleep(10); // 5 seconds
else if (i<700)
msleep(50); // 10 seconds
else if (i<1200)
msleep(100); // 50 seconds
else
msleep(1000); // X minutes
}
US_DEBUGP("Waited not busy for %d minutes, timing out.\n",
minutes);
return USB_STOR_TRANSPORT_FAILED;
}
/*
* Read block data from the data register
*/
static int usbat_read_block(struct us_data *us,
unsigned char *content,
unsigned short len)
{
int result;
unsigned char *command = us->iobuf;
if (!len)
return USB_STOR_TRANSPORT_GOOD;
command[0] = 0xC0;
command[1] = USBAT_ATA | USBAT_CMD_READ_BLOCK;
command[2] = USBAT_ATA_DATA;
command[3] = 0;
command[4] = 0;
command[5] = 0;
command[6] = LSB_of(len);
command[7] = MSB_of(len);
result = usbat_execute_command(us, command, 8);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
result = usbat_bulk_read(us, content, len);
return (result == USB_STOR_XFER_GOOD ?
USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_ERROR);
}
/*
* Write block data via the data register
*/
static int usbat_write_block(struct us_data *us,
unsigned char access,
unsigned char *content,
unsigned short len,
int minutes)
{
int result;
unsigned char *command = us->iobuf;
if (!len)
return USB_STOR_TRANSPORT_GOOD;
command[0] = 0x40;
command[1] = access | USBAT_CMD_WRITE_BLOCK;
command[2] = USBAT_ATA_DATA;
command[3] = 0;
command[4] = 0;
command[5] = 0;
command[6] = LSB_of(len);
command[7] = MSB_of(len);
result = usbat_execute_command(us, command, 8);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
result = usbat_bulk_write(us, content, len);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
return usbat_wait_not_busy(us, minutes);
}
/*
* Process read and write requests
*/
static int usbat_hp8200e_rw_block_test(struct us_data *us,
unsigned char access,
unsigned char *registers,
unsigned char *data_out,
unsigned short num_registers,
unsigned char data_reg,
unsigned char status_reg,
unsigned char timeout,
unsigned char qualifier,
int direction,
unsigned char *content,
unsigned short len,
int use_sg,
int minutes)
{
int result;
unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
us->recv_bulk_pipe : us->send_bulk_pipe;
unsigned char *command = us->iobuf;
int i, j;
int cmdlen;
unsigned char *data = us->iobuf;
unsigned char *status = us->iobuf;
BUG_ON(num_registers > US_IOBUF_SIZE/2);
for (i=0; i<20; i++) {
/*
* The first time we send the full command, which consists
* of downloading the SCSI command followed by downloading
* the data via a write-and-test. Any other time we only
* send the command to download the data -- the SCSI command
* is still 'active' in some sense in the device.
*
* We're only going to try sending the data 10 times. After
* that, we just return a failure.
*/
if (i==0) {
cmdlen = 16;
// Write to multiple registers
// Not really sure the 0x07, 0x17, 0xfc, 0xe7 is necessary here,
// but that's what came out of the trace every single time.
command[0] = 0x40;
command[1] = access | USBAT_CMD_WRITE_REGS;
command[2] = 0x07;
command[3] = 0x17;
command[4] = 0xFC;
command[5] = 0xE7;
command[6] = LSB_of(num_registers*2);
command[7] = MSB_of(num_registers*2);
} else
cmdlen = 8;
// Conditionally read or write blocks
command[cmdlen-8] = (direction==DMA_TO_DEVICE ? 0x40 : 0xC0);
command[cmdlen-7] = access |
(direction==DMA_TO_DEVICE ?
USBAT_CMD_COND_WRITE_BLOCK : USBAT_CMD_COND_READ_BLOCK);
command[cmdlen-6] = data_reg;
command[cmdlen-5] = status_reg;
command[cmdlen-4] = timeout;
command[cmdlen-3] = qualifier;
command[cmdlen-2] = LSB_of(len);
command[cmdlen-1] = MSB_of(len);
result = usbat_execute_command(us, command, cmdlen);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (i==0) {
for (j=0; j<num_registers; j++) {
data[j<<1] = registers[j];
data[1+(j<<1)] = data_out[j];
}
result = usbat_bulk_write(us, data, num_registers*2);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
}
//US_DEBUGP("Transfer %s %d bytes, sg buffers %d\n",
// direction == DMA_TO_DEVICE ? "out" : "in",
// len, use_sg);
result = usb_stor_bulk_transfer_sg(us,
pipe, content, len, use_sg, NULL);
/*
* If we get a stall on the bulk download, we'll retry
* the bulk download -- but not the SCSI command because
* in some sense the SCSI command is still 'active' and
* waiting for the data. Don't ask me why this should be;
* I'm only following what the Windoze driver did.
*
* Note that a stall for the test-and-read/write command means
* that the test failed. In this case we're testing to make
* sure that the device is error-free
* (i.e. bit 0 -- CHK -- of status is 0). The most likely
* hypothesis is that the USBAT chip somehow knows what
* the device will accept, but doesn't give the device any
* data until all data is received. Thus, the device would
* still be waiting for the first byte of data if a stall
* occurs, even if the stall implies that some data was
* transferred.
*/
if (result == USB_STOR_XFER_SHORT ||
result == USB_STOR_XFER_STALLED) {
/*
* If we're reading and we stalled, then clear
* the bulk output pipe only the first time.
*/
if (direction==DMA_FROM_DEVICE && i==0) {
if (usb_stor_clear_halt(us,
us->send_bulk_pipe) < 0)
return USB_STOR_TRANSPORT_ERROR;
}
/*
* Read status: is the device angry, or just busy?
*/
result = usbat_read(us, USBAT_ATA,
direction==DMA_TO_DEVICE ?
USBAT_ATA_STATUS : USBAT_ATA_ALTSTATUS,
status);
if (result!=USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (*status & 0x01) // check condition
return USB_STOR_TRANSPORT_FAILED;
if (*status & 0x20) // device fault
return USB_STOR_TRANSPORT_FAILED;
US_DEBUGP("Redoing %s\n",
direction==DMA_TO_DEVICE ? "write" : "read");
} else if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
else
return usbat_wait_not_busy(us, minutes);
}
US_DEBUGP("Bummer! %s bulk data 20 times failed.\n",
direction==DMA_TO_DEVICE ? "Writing" : "Reading");
return USB_STOR_TRANSPORT_FAILED;
}
/*
* Write to multiple registers:
* Allows us to write specific data to any registers. The data to be written
* gets packed in this sequence: reg0, data0, reg1, data1, ..., regN, dataN
* which gets sent through bulk out.
* Not designed for large transfers of data!
*/
static int usbat_multiple_write(struct us_data *us,
unsigned char *registers,
unsigned char *data_out,
unsigned short num_registers)
{
int i, result;
unsigned char *data = us->iobuf;
unsigned char *command = us->iobuf;
BUG_ON(num_registers > US_IOBUF_SIZE/2);
// Write to multiple registers, ATA access
command[0] = 0x40;
command[1] = USBAT_ATA | USBAT_CMD_WRITE_REGS;
// No relevance
command[2] = 0;
command[3] = 0;
command[4] = 0;
command[5] = 0;
// Number of bytes to be transferred (incl. addresses and data)
command[6] = LSB_of(num_registers*2);
command[7] = MSB_of(num_registers*2);
// The setup command
result = usbat_execute_command(us, command, 8);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
// Create the reg/data, reg/data sequence
for (i=0; i<num_registers; i++) {
data[i<<1] = registers[i];
data[1+(i<<1)] = data_out[i];
}
// Send the data
result = usbat_bulk_write(us, data, num_registers*2);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (usbat_get_device_type(us) == USBAT_DEV_HP8200)
return usbat_wait_not_busy(us, 0);
else
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Conditionally read blocks from device:
* Allows us to read blocks from a specific data register, based upon the
* condition that a status register can be successfully masked with a status
* qualifier. If this condition is not initially met, the read will wait
* up until a maximum amount of time has elapsed, as specified by timeout.
* The read will start when the condition is met, otherwise the command aborts.
*
* The qualifier defined here is not the value that is masked, it defines
* conditions for the write to take place. The actual masked qualifier (and
* other related details) are defined beforehand with _set_shuttle_features().
*/
static int usbat_read_blocks(struct us_data *us,
unsigned char *buffer,
int len)
{
int result;
unsigned char *command = us->iobuf;
command[0] = 0xC0;
command[1] = USBAT_ATA | USBAT_CMD_COND_READ_BLOCK;
command[2] = USBAT_ATA_DATA;
command[3] = USBAT_ATA_STATUS;
command[4] = 0xFD; // Timeout (ms);
command[5] = USBAT_QUAL_FCQ;
command[6] = LSB_of(len);
command[7] = MSB_of(len);
// Multiple block read setup command
result = usbat_execute_command(us, command, 8);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_FAILED;
// Read the blocks we just asked for
result = usbat_bulk_read(us, buffer, len);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_FAILED;
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Conditionally write blocks to device:
* Allows us to write blocks to a specific data register, based upon the
* condition that a status register can be successfully masked with a status
* qualifier. If this condition is not initially met, the write will wait
* up until a maximum amount of time has elapsed, as specified by timeout.
* The read will start when the condition is met, otherwise the command aborts.
*
* The qualifier defined here is not the value that is masked, it defines
* conditions for the write to take place. The actual masked qualifier (and
* other related details) are defined beforehand with _set_shuttle_features().
*/
static int usbat_write_blocks(struct us_data *us,
unsigned char *buffer,
int len)
{
int result;
unsigned char *command = us->iobuf;
command[0] = 0x40;
command[1] = USBAT_ATA | USBAT_CMD_COND_WRITE_BLOCK;
command[2] = USBAT_ATA_DATA;
command[3] = USBAT_ATA_STATUS;
command[4] = 0xFD; // Timeout (ms)
command[5] = USBAT_QUAL_FCQ;
command[6] = LSB_of(len);
command[7] = MSB_of(len);
// Multiple block write setup command
result = usbat_execute_command(us, command, 8);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_FAILED;
// Write the data
result = usbat_bulk_write(us, buffer, len);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_FAILED;
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Read the User IO register
*/
static int usbat_read_user_io(struct us_data *us, unsigned char *data_flags)
{
int result;
result = usb_stor_ctrl_transfer(us,
us->recv_ctrl_pipe,
USBAT_CMD_UIO,
0xC0,
0,
0,
data_flags,
USBAT_UIO_READ);
US_DEBUGP("usbat_read_user_io: UIO register reads %02X\n", (unsigned short) (*data_flags));
return result;
}
/*
* Write to the User IO register
*/
static int usbat_write_user_io(struct us_data *us,
unsigned char enable_flags,
unsigned char data_flags)
{
return usb_stor_ctrl_transfer(us,
us->send_ctrl_pipe,
USBAT_CMD_UIO,
0x40,
short_pack(enable_flags, data_flags),
0,
NULL,
USBAT_UIO_WRITE);
}
/*
* Reset the device
* Often needed on media change.
*/
static int usbat_device_reset(struct us_data *us)
{
int rc;
// Reset peripheral, enable peripheral control signals
// (bring reset signal up)
rc = usbat_write_user_io(us,
USBAT_UIO_DRVRST | USBAT_UIO_OE1 | USBAT_UIO_OE0,
USBAT_UIO_EPAD | USBAT_UIO_1);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
// Enable peripheral control signals
// (bring reset signal down)
rc = usbat_write_user_io(us,
USBAT_UIO_OE1 | USBAT_UIO_OE0,
USBAT_UIO_EPAD | USBAT_UIO_1);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Enable card detect
*/
static int usbat_device_enable_cdt(struct us_data *us)
{
int rc;
// Enable peripheral control signals and card detect
rc = usbat_write_user_io(us,
USBAT_UIO_ACKD | USBAT_UIO_OE1 | USBAT_UIO_OE0,
USBAT_UIO_EPAD | USBAT_UIO_1);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Determine if media is present.
*/
static int usbat_flash_check_media_present(unsigned char *uio)
{
if (*uio & USBAT_UIO_UI0) {
US_DEBUGP("usbat_flash_check_media_present: no media detected\n");
return USBAT_FLASH_MEDIA_NONE;
}
return USBAT_FLASH_MEDIA_CF;
}
/*
* Determine if media has changed since last operation
*/
static int usbat_flash_check_media_changed(unsigned char *uio)
{
if (*uio & USBAT_UIO_0) {
US_DEBUGP("usbat_flash_check_media_changed: media change detected\n");
return USBAT_FLASH_MEDIA_CHANGED;
}
return USBAT_FLASH_MEDIA_SAME;
}
/*
* Check for media change / no media and handle the situation appropriately
*/
static int usbat_flash_check_media(struct us_data *us,
struct usbat_info *info)
{
int rc;
unsigned char *uio = us->iobuf;
rc = usbat_read_user_io(us, uio);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
// Check for media existence
rc = usbat_flash_check_media_present(uio);
if (rc == USBAT_FLASH_MEDIA_NONE) {
info->sense_key = 0x02;
info->sense_asc = 0x3A;
info->sense_ascq = 0x00;
return USB_STOR_TRANSPORT_FAILED;
}
// Check for media change
rc = usbat_flash_check_media_changed(uio);
if (rc == USBAT_FLASH_MEDIA_CHANGED) {
// Reset and re-enable card detect
rc = usbat_device_reset(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
rc = usbat_device_enable_cdt(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
msleep(50);
rc = usbat_read_user_io(us, uio);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
info->sense_key = UNIT_ATTENTION;
info->sense_asc = 0x28;
info->sense_ascq = 0x00;
return USB_STOR_TRANSPORT_FAILED;
}
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Determine whether we are controlling a flash-based reader/writer,
* or a HP8200-based CD drive.
* Sets transport functions as appropriate.
*/
static int usbat_identify_device(struct us_data *us,
struct usbat_info *info)
{
int rc;
unsigned char status;
if (!us || !info)
return USB_STOR_TRANSPORT_ERROR;
rc = usbat_device_reset(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
/*
* By examining the device signature after a reset, we can identify
* whether the device supports the ATAPI packet interface.
* The flash-devices do not support this, whereas the HP CDRW's obviously
* do.
*
* This method is not ideal, but works because no other devices have been
* produced based on the USBAT/USBAT02.
*
* Section 9.1 of the ATAPI-4 spec states (amongst other things) that
* after a device reset, a Cylinder low of 0x14 indicates that the device
* does support packet commands.
*/
rc = usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, &status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("usbat_identify_device: Cylinder low is %02X\n", status);
if (status == 0x14) {
// Device is HP 8200
US_DEBUGP("usbat_identify_device: Detected HP8200 CDRW\n");
info->devicetype = USBAT_DEV_HP8200;
} else {
// Device is a CompactFlash reader/writer
US_DEBUGP("usbat_identify_device: Detected Flash reader/writer\n");
info->devicetype = USBAT_DEV_FLASH;
}
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Set the transport function based on the device type
*/
static int usbat_set_transport(struct us_data *us,
struct usbat_info *info)
{
int rc;
if (!info->devicetype) {
rc = usbat_identify_device(us, info);
if (rc != USB_STOR_TRANSPORT_GOOD) {
US_DEBUGP("usbat_set_transport: Could not identify device\n");
return 1;
}
}
if (usbat_get_device_type(us) == USBAT_DEV_HP8200)
us->transport = usbat_hp8200e_transport;
else if (usbat_get_device_type(us) == USBAT_DEV_FLASH)
us->transport = usbat_flash_transport;
return 0;
}
/*
* Read the media capacity
*/
static int usbat_flash_get_sector_count(struct us_data *us,
struct usbat_info *info)
{
unsigned char registers[3] = {
USBAT_ATA_SECCNT,
USBAT_ATA_DEVICE,
USBAT_ATA_CMD,
};
unsigned char command[3] = { 0x01, 0xA0, 0xEC };
unsigned char *reply;
unsigned char status;
int rc;
if (!us || !info)
return USB_STOR_TRANSPORT_ERROR;
reply = kmalloc(512, GFP_NOIO);
if (!reply)
return USB_STOR_TRANSPORT_ERROR;
// ATAPI command : IDENTIFY DEVICE
rc = usbat_multiple_write(us, registers, command, 3);
if (rc != USB_STOR_XFER_GOOD) {
US_DEBUGP("usbat_flash_get_sector_count: Gah! identify_device failed\n");
rc = USB_STOR_TRANSPORT_ERROR;
goto leave;
}
// Read device status
if (usbat_get_status(us, &status) != USB_STOR_XFER_GOOD) {
rc = USB_STOR_TRANSPORT_ERROR;
goto leave;
}
msleep(100);
// Read the device identification data
rc = usbat_read_block(us, reply, 512);
if (rc != USB_STOR_TRANSPORT_GOOD)
goto leave;
info->sectors = ((u32)(reply[117]) << 24) |
((u32)(reply[116]) << 16) |
((u32)(reply[115]) << 8) |
((u32)(reply[114]) );
rc = USB_STOR_TRANSPORT_GOOD;
leave:
kfree(reply);
return rc;
}
/*
* Read data from device
*/
static int usbat_flash_read_data(struct us_data *us,
struct usbat_info *info,
u32 sector,
u32 sectors)
{
unsigned char registers[7] = {
USBAT_ATA_FEATURES,
USBAT_ATA_SECCNT,
USBAT_ATA_SECNUM,
USBAT_ATA_LBA_ME,
USBAT_ATA_LBA_HI,
USBAT_ATA_DEVICE,
USBAT_ATA_STATUS,
};
unsigned char command[7];
unsigned char *buffer;
unsigned char thistime;
unsigned int totallen, alloclen;
int len, result;
unsigned int sg_idx = 0, sg_offset = 0;
result = usbat_flash_check_media(us, info);
if (result != USB_STOR_TRANSPORT_GOOD)
return result;
// we're working in LBA mode. according to the ATA spec,
// we can support up to 28-bit addressing. I don't know if Jumpshot
// supports beyond 24-bit addressing. It's kind of hard to test
// since it requires > 8GB CF card.
if (sector > 0x0FFFFFFF)
return USB_STOR_TRANSPORT_ERROR;
totallen = sectors * info->ssize;
// Since we don't read more than 64 KB at a time, we have to create
// a bounce buffer and move the data a piece at a time between the
// bounce buffer and the actual transfer buffer.
alloclen = min(totallen, 65536u);
buffer = kmalloc(alloclen, GFP_NOIO);
if (buffer == NULL)
return USB_STOR_TRANSPORT_ERROR;
do {
// loop, never allocate or transfer more than 64k at once
// (min(128k, 255*info->ssize) is the real limit)
len = min(totallen, alloclen);
thistime = (len / info->ssize) & 0xff;
// ATAPI command 0x20 (READ SECTORS)
usbat_pack_atapi_sector_cmd(command, thistime, sector, 0x20);
// Write/execute ATAPI read command
result = usbat_multiple_write(us, registers, command, 7);
if (result != USB_STOR_TRANSPORT_GOOD)
goto leave;
// Read the data we just requested
result = usbat_read_blocks(us, buffer, len);
if (result != USB_STOR_TRANSPORT_GOOD)
goto leave;
US_DEBUGP("usbat_flash_read_data: %d bytes\n", len);
// Store the data in the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
&sg_idx, &sg_offset, TO_XFER_BUF);
sector += thistime;
totallen -= len;
} while (totallen > 0);
kfree(buffer);
return USB_STOR_TRANSPORT_GOOD;
leave:
kfree(buffer);
return USB_STOR_TRANSPORT_ERROR;
}
/*
* Write data to device
*/
static int usbat_flash_write_data(struct us_data *us,
struct usbat_info *info,
u32 sector,
u32 sectors)
{
unsigned char registers[7] = {
USBAT_ATA_FEATURES,
USBAT_ATA_SECCNT,
USBAT_ATA_SECNUM,
USBAT_ATA_LBA_ME,
USBAT_ATA_LBA_HI,
USBAT_ATA_DEVICE,
USBAT_ATA_STATUS,
};
unsigned char command[7];
unsigned char *buffer;
unsigned char thistime;
unsigned int totallen, alloclen;
int len, result;
unsigned int sg_idx = 0, sg_offset = 0;
result = usbat_flash_check_media(us, info);
if (result != USB_STOR_TRANSPORT_GOOD)
return result;
// we're working in LBA mode. according to the ATA spec,
// we can support up to 28-bit addressing. I don't know if Jumpshot
// supports beyond 24-bit addressing. It's kind of hard to test
// since it requires > 8GB CF card.
if (sector > 0x0FFFFFFF)
return USB_STOR_TRANSPORT_ERROR;
totallen = sectors * info->ssize;
// Since we don't write more than 64 KB at a time, we have to create
// a bounce buffer and move the data a piece at a time between the
// bounce buffer and the actual transfer buffer.
alloclen = min(totallen, 65536u);
buffer = kmalloc(alloclen, GFP_NOIO);
if (buffer == NULL)
return USB_STOR_TRANSPORT_ERROR;
do {
// loop, never allocate or transfer more than 64k at once
// (min(128k, 255*info->ssize) is the real limit)
len = min(totallen, alloclen);
thistime = (len / info->ssize) & 0xff;
// Get the data from the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
&sg_idx, &sg_offset, FROM_XFER_BUF);
// ATAPI command 0x30 (WRITE SECTORS)
usbat_pack_atapi_sector_cmd(command, thistime, sector, 0x30);
// Write/execute ATAPI write command
result = usbat_multiple_write(us, registers, command, 7);
if (result != USB_STOR_TRANSPORT_GOOD)
goto leave;
// Write the data
result = usbat_write_blocks(us, buffer, len);
if (result != USB_STOR_TRANSPORT_GOOD)
goto leave;
sector += thistime;
totallen -= len;
} while (totallen > 0);
kfree(buffer);
return result;
leave:
kfree(buffer);
return USB_STOR_TRANSPORT_ERROR;
}
/*
* Squeeze a potentially huge (> 65535 byte) read10 command into
* a little ( <= 65535 byte) ATAPI pipe
*/
static int usbat_hp8200e_handle_read10(struct us_data *us,
unsigned char *registers,
unsigned char *data,
struct scsi_cmnd *srb)
{
int result = USB_STOR_TRANSPORT_GOOD;
unsigned char *buffer;
unsigned int len;
unsigned int sector;
unsigned int sg_segment = 0;
unsigned int sg_offset = 0;
US_DEBUGP("handle_read10: transfersize %d\n",
srb->transfersize);
if (srb->request_bufflen < 0x10000) {
result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
registers, data, 19,
USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
(USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
DMA_FROM_DEVICE,
srb->request_buffer,
srb->request_bufflen, srb->use_sg, 1);
return result;
}
/*
* Since we're requesting more data than we can handle in
* a single read command (max is 64k-1), we will perform
* multiple reads, but each read must be in multiples of
* a sector. Luckily the sector size is in srb->transfersize
* (see linux/drivers/scsi/sr.c).
*/
if (data[7+0] == GPCMD_READ_CD) {
len = short_pack(data[7+9], data[7+8]);
len <<= 16;
len |= data[7+7];
US_DEBUGP("handle_read10: GPCMD_READ_CD: len %d\n", len);
srb->transfersize = srb->request_bufflen/len;
}
if (!srb->transfersize) {
srb->transfersize = 2048; /* A guess */
US_DEBUGP("handle_read10: transfersize 0, forcing %d\n",
srb->transfersize);
}
// Since we only read in one block at a time, we have to create
// a bounce buffer and move the data a piece at a time between the
// bounce buffer and the actual transfer buffer.
len = (65535/srb->transfersize) * srb->transfersize;
US_DEBUGP("Max read is %d bytes\n", len);
len = min(len, srb->request_bufflen);
buffer = kmalloc(len, GFP_NOIO);
if (buffer == NULL) // bloody hell!
return USB_STOR_TRANSPORT_FAILED;
sector = short_pack(data[7+3], data[7+2]);
sector <<= 16;
sector |= short_pack(data[7+5], data[7+4]);
transferred = 0;
sg_segment = 0; // for keeping track of where we are in
sg_offset = 0; // the scatter/gather list
while (transferred != srb->request_bufflen) {
if (len > srb->request_bufflen - transferred)
len = srb->request_bufflen - transferred;
data[3] = len&0xFF; // (cylL) = expected length (L)
data[4] = (len>>8)&0xFF; // (cylH) = expected length (H)
// Fix up the SCSI command sector and num sectors
data[7+2] = MSB_of(sector>>16); // SCSI command sector
data[7+3] = LSB_of(sector>>16);
data[7+4] = MSB_of(sector&0xFFFF);
data[7+5] = LSB_of(sector&0xFFFF);
if (data[7+0] == GPCMD_READ_CD)
data[7+6] = 0;
data[7+7] = MSB_of(len / srb->transfersize); // SCSI command
data[7+8] = LSB_of(len / srb->transfersize); // num sectors
result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
registers, data, 19,
USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
(USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
DMA_FROM_DEVICE,
buffer,
len, 0, 1);
if (result != USB_STOR_TRANSPORT_GOOD)
break;
// Store the data in the transfer buffer
usb_stor_access_xfer_buf(buffer, len, srb,
&sg_segment, &sg_offset, TO_XFER_BUF);
// Update the amount transferred and the sector number
transferred += len;
sector += len / srb->transfersize;
} // while transferred != srb->request_bufflen
kfree(buffer);
return result;
}
static int usbat_select_and_test_registers(struct us_data *us)
{
int selector;
unsigned char *status = us->iobuf;
unsigned char max_selector = 0xB0;
if (usbat_get_device_type(us) == USBAT_DEV_FLASH)
max_selector = 0xA0;
// try device = master, then device = slave.
for (selector = 0xA0; selector <= max_selector; selector += 0x10) {
if (usbat_get_device_type(us) == USBAT_DEV_HP8200 &&
usbat_write(us, USBAT_ATA, USBAT_ATA_DEVICE, selector) !=
USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status) !=
USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (usbat_read(us, USBAT_ATA, USBAT_ATA_DEVICE, status) !=
USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_ME, 0x55) !=
USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_HI, 0xAA) !=
USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
}
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Initialize the USBAT processor and the storage device
*/
int init_usbat(struct us_data *us)
{
int rc;
struct usbat_info *info;
unsigned char subcountH = USBAT_ATA_LBA_HI;
unsigned char subcountL = USBAT_ATA_LBA_ME;
unsigned char *status = us->iobuf;
us->extra = kmalloc(sizeof(struct usbat_info), GFP_NOIO);
if (!us->extra) {
US_DEBUGP("init_usbat: Gah! Can't allocate storage for usbat info struct!\n");
return 1;
}
memset(us->extra, 0, sizeof(struct usbat_info));
info = (struct usbat_info *) (us->extra);
// Enable peripheral control signals
rc = usbat_write_user_io(us,
USBAT_UIO_OE1 | USBAT_UIO_OE0,
USBAT_UIO_EPAD | USBAT_UIO_1);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 1\n");
msleep(2000);
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
US_DEBUGP("INIT 2\n");
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 3\n");
// At this point, we need to detect which device we are using
if (usbat_set_transport(us, info))
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 4\n");
if (usbat_get_device_type(us) == USBAT_DEV_HP8200) {
msleep(250);
// Write 0x80 to ISA port 0x3F
rc = usbat_write(us, USBAT_ISA, 0x3F, 0x80);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 5\n");
// Read ISA port 0x27
rc = usbat_read(us, USBAT_ISA, 0x27, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 6\n");
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 7\n");
}
rc = usbat_select_and_test_registers(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
US_DEBUGP("INIT 8\n");
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 9\n");
// Enable peripheral control signals and card detect
rc = usbat_device_enable_cdt(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
US_DEBUGP("INIT 10\n");
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 11\n");
msleep(1400);
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 12\n");
rc = usbat_select_and_test_registers(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
US_DEBUGP("INIT 13\n");
if (usbat_get_device_type(us) == USBAT_DEV_FLASH) {
subcountH = 0x02;
subcountL = 0x00;
}
rc = usbat_set_shuttle_features(us, (USBAT_FEAT_ETEN | USBAT_FEAT_ET2 | USBAT_FEAT_ET1),
0x00, 0x88, 0x08, subcountH, subcountL);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 14\n");
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Transport for the HP 8200e
*/
static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int result;
unsigned char *status = us->iobuf;
unsigned char registers[32];
unsigned char data[32];
unsigned int len;
int i;
char string[64];
len = srb->request_bufflen;
/* Send A0 (ATA PACKET COMMAND).
Note: I guess we're never going to get any of the ATA
commands... just ATA Packet Commands.
*/
registers[0] = USBAT_ATA_FEATURES;
registers[1] = USBAT_ATA_SECCNT;
registers[2] = USBAT_ATA_SECNUM;
registers[3] = USBAT_ATA_LBA_ME;
registers[4] = USBAT_ATA_LBA_HI;
registers[5] = USBAT_ATA_DEVICE;
registers[6] = USBAT_ATA_CMD;
data[0] = 0x00;
data[1] = 0x00;
data[2] = 0x00;
data[3] = len&0xFF; // (cylL) = expected length (L)
data[4] = (len>>8)&0xFF; // (cylH) = expected length (H)
data[5] = 0xB0; // (device sel) = slave
data[6] = 0xA0; // (command) = ATA PACKET COMMAND
for (i=7; i<19; i++) {
registers[i] = 0x10;
data[i] = (i-7 >= srb->cmd_len) ? 0 : srb->cmnd[i-7];
}
result = usbat_get_status(us, status);
US_DEBUGP("Status = %02X\n", *status);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (srb->cmnd[0] == TEST_UNIT_READY)
transferred = 0;
if (srb->sc_data_direction == DMA_TO_DEVICE) {
result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
registers, data, 19,
USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
(USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
DMA_TO_DEVICE,
srb->request_buffer,
len, srb->use_sg, 10);
if (result == USB_STOR_TRANSPORT_GOOD) {
transferred += len;
US_DEBUGP("Wrote %08X bytes\n", transferred);
}
return result;
} else if (srb->cmnd[0] == READ_10 ||
srb->cmnd[0] == GPCMD_READ_CD) {
return usbat_hp8200e_handle_read10(us, registers, data, srb);
}
if (len > 0xFFFF) {
US_DEBUGP("Error: len = %08X... what do I do now?\n",
len);
return USB_STOR_TRANSPORT_ERROR;
}
if ( (result = usbat_multiple_write(us,
registers, data, 7)) != USB_STOR_TRANSPORT_GOOD) {
return result;
}
// Write the 12-byte command header.
// If the command is BLANK then set the timer for 75 minutes.
// Otherwise set it for 10 minutes.
// NOTE: THE 8200 DOCUMENTATION STATES THAT BLANKING A CDRW
// AT SPEED 4 IS UNRELIABLE!!!
if ( (result = usbat_write_block(us,
USBAT_ATA, srb->cmnd, 12,
srb->cmnd[0]==GPCMD_BLANK ? 75 : 10)) !=
USB_STOR_TRANSPORT_GOOD) {
return result;
}
// If there is response data to be read in
// then do it here.
if (len != 0 && (srb->sc_data_direction == DMA_FROM_DEVICE)) {
// How many bytes to read in? Check cylL register
if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
USB_STOR_XFER_GOOD) {
return USB_STOR_TRANSPORT_ERROR;
}
if (len > 0xFF) { // need to read cylH also
len = *status;
if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
USB_STOR_XFER_GOOD) {
return USB_STOR_TRANSPORT_ERROR;
}
len += ((unsigned int) *status)<<8;
}
else
len = *status;
result = usbat_read_block(us, srb->request_buffer, len);
/* Debug-print the first 32 bytes of the transfer */
if (!srb->use_sg) {
string[0] = 0;
for (i=0; i<len && i<32; i++) {
sprintf(string+strlen(string), "%02X ",
((unsigned char *)srb->request_buffer)[i]);
if ((i%16)==15) {
US_DEBUGP("%s\n", string);
string[0] = 0;
}
}
if (string[0]!=0)
US_DEBUGP("%s\n", string);
}
}
return result;
}
/*
* Transport for USBAT02-based CompactFlash and similar storage devices
*/
static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us)
{
int rc;
struct usbat_info *info = (struct usbat_info *) (us->extra);
unsigned long block, blocks;
unsigned char *ptr = us->iobuf;
static unsigned char inquiry_response[36] = {
0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
};
if (srb->cmnd[0] == INQUIRY) {
US_DEBUGP("usbat_flash_transport: INQUIRY. Returning bogus response.\n");
memcpy(ptr, inquiry_response, sizeof(inquiry_response));
fill_inquiry_response(us, ptr, 36);
return USB_STOR_TRANSPORT_GOOD;
}
if (srb->cmnd[0] == READ_CAPACITY) {
rc = usbat_flash_check_media(us, info);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
rc = usbat_flash_get_sector_count(us, info);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
US_DEBUGP("usbat_flash_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
info->sectors, info->ssize);
// build the reply
// note: must return the sector number of the last sector,
// *not* the total number of sectors
((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
usb_stor_set_xfer_buf(ptr, 8, srb);
return USB_STOR_TRANSPORT_GOOD;
}
if (srb->cmnd[0] == MODE_SELECT_10) {
US_DEBUGP("usbat_flash_transport: Gah! MODE_SELECT_10.\n");
return USB_STOR_TRANSPORT_ERROR;
}
if (srb->cmnd[0] == READ_10) {
block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
US_DEBUGP("usbat_flash_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks);
return usbat_flash_read_data(us, info, block, blocks);
}
if (srb->cmnd[0] == READ_12) {
// I don't think we'll ever see a READ_12 but support it anyway...
block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
US_DEBUGP("usbat_flash_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks);
return usbat_flash_read_data(us, info, block, blocks);
}
if (srb->cmnd[0] == WRITE_10) {
block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
US_DEBUGP("usbat_flash_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks);
return usbat_flash_write_data(us, info, block, blocks);
}
if (srb->cmnd[0] == WRITE_12) {
// I don't think we'll ever see a WRITE_12 but support it anyway...
block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
US_DEBUGP("usbat_flash_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks);
return usbat_flash_write_data(us, info, block, blocks);
}
if (srb->cmnd[0] == TEST_UNIT_READY) {
US_DEBUGP("usbat_flash_transport: TEST_UNIT_READY.\n");
rc = usbat_flash_check_media(us, info);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
return usbat_check_status(us);
}
if (srb->cmnd[0] == REQUEST_SENSE) {
US_DEBUGP("usbat_flash_transport: REQUEST_SENSE.\n");
memset(ptr, 0, 18);
ptr[0] = 0xF0;
ptr[2] = info->sense_key;
ptr[7] = 11;
ptr[12] = info->sense_asc;
ptr[13] = info->sense_ascq;
usb_stor_set_xfer_buf(ptr, 18, srb);
return USB_STOR_TRANSPORT_GOOD;
}
if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
// sure. whatever. not like we can stop the user from popping
// the media out of the device (no locking doors, etc)
return USB_STOR_TRANSPORT_GOOD;
}
US_DEBUGP("usbat_flash_transport: Gah! Unknown command: %d (0x%x)\n",
srb->cmnd[0], srb->cmnd[0]);
info->sense_key = 0x05;
info->sense_asc = 0x20;
info->sense_ascq = 0x00;
return USB_STOR_TRANSPORT_FAILED;
}
/*
* Default transport function. Attempts to detect which transport function
* should be called, makes it the new default, and calls it.
*
* This function should never be called. Our usbat_init() function detects the
* device type and changes the us->transport ptr to the transport function
* relevant to the device.
* However, we'll support this impossible(?) case anyway.
*/
int usbat_transport(struct scsi_cmnd *srb, struct us_data *us)
{
struct usbat_info *info = (struct usbat_info*) (us->extra);
if (usbat_set_transport(us, info))
return USB_STOR_TRANSPORT_ERROR;
return us->transport(srb, us);
}
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