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Chromebook-Device-Nyan-NVID.../drivers/usb/storage/shuttle_usbat.c

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/* Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable
*
* 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/errno.h>
#include <linux/module.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"
MODULE_DESCRIPTION("Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable");
MODULE_AUTHOR("Daniel Drake <dsd@gentoo.org>, Robert Baruch <autophile@starband.net>");
MODULE_LICENSE("GPL");
/* Supported device types */
#define USBAT_DEV_HP8200 0x01
#define USBAT_DEV_FLASH 0x02
#define USBAT_EPP_PORT 0x10
#define USBAT_EPP_REGISTER 0x30
#define USBAT_ATA 0x40
#define USBAT_ISA 0x50
/* Commands (need to be logically OR'd with an access type */
#define USBAT_CMD_READ_REG 0x00
#define USBAT_CMD_WRITE_REG 0x01
#define USBAT_CMD_READ_BLOCK 0x02
#define USBAT_CMD_WRITE_BLOCK 0x03
#define USBAT_CMD_COND_READ_BLOCK 0x04
#define USBAT_CMD_COND_WRITE_BLOCK 0x05
#define USBAT_CMD_WRITE_REGS 0x07
/* Commands (these don't need an access type) */
#define USBAT_CMD_EXEC_CMD 0x80
#define USBAT_CMD_SET_FEAT 0x81
#define USBAT_CMD_UIO 0x82
/* Methods of accessing UIO register */
#define USBAT_UIO_READ 1
#define USBAT_UIO_WRITE 0
/* Qualifier bits */
#define USBAT_QUAL_FCQ 0x20 /* full compare */
#define USBAT_QUAL_ALQ 0x10 /* auto load subcount */
/* USBAT Flash Media status types */
#define USBAT_FLASH_MEDIA_NONE 0
#define USBAT_FLASH_MEDIA_CF 1
/* USBAT Flash Media change types */
#define USBAT_FLASH_MEDIA_SAME 0
#define USBAT_FLASH_MEDIA_CHANGED 1
/* USBAT ATA registers */
#define USBAT_ATA_DATA 0x10 /* read/write data (R/W) */
#define USBAT_ATA_FEATURES 0x11 /* set features (W) */
#define USBAT_ATA_ERROR 0x11 /* error (R) */
#define USBAT_ATA_SECCNT 0x12 /* sector count (R/W) */
#define USBAT_ATA_SECNUM 0x13 /* sector number (R/W) */
#define USBAT_ATA_LBA_ME 0x14 /* cylinder low (R/W) */
#define USBAT_ATA_LBA_HI 0x15 /* cylinder high (R/W) */
#define USBAT_ATA_DEVICE 0x16 /* head/device selection (R/W) */
#define USBAT_ATA_STATUS 0x17 /* device status (R) */
#define USBAT_ATA_CMD 0x17 /* device command (W) */
#define USBAT_ATA_ALTSTATUS 0x0E /* status (no clear IRQ) (R) */
/* USBAT User I/O Data registers */
#define USBAT_UIO_EPAD 0x80 /* Enable Peripheral Control Signals */
#define USBAT_UIO_CDT 0x40 /* Card Detect (Read Only) */
/* CDT = ACKD & !UI1 & !UI0 */
#define USBAT_UIO_1 0x20 /* I/O 1 */
#define USBAT_UIO_0 0x10 /* I/O 0 */
#define USBAT_UIO_EPP_ATA 0x08 /* 1=EPP mode, 0=ATA mode */
#define USBAT_UIO_UI1 0x04 /* Input 1 */
#define USBAT_UIO_UI0 0x02 /* Input 0 */
#define USBAT_UIO_INTR_ACK 0x01 /* Interrupt (ATA/ISA)/Acknowledge (EPP) */
/* USBAT User I/O Enable registers */
#define USBAT_UIO_DRVRST 0x80 /* Reset Peripheral */
#define USBAT_UIO_ACKD 0x40 /* Enable Card Detect */
#define USBAT_UIO_OE1 0x20 /* I/O 1 set=output/clr=input */
/* If ACKD=1, set OE1 to 1 also. */
#define USBAT_UIO_OE0 0x10 /* I/O 0 set=output/clr=input */
#define USBAT_UIO_ADPRST 0x01 /* Reset SCM chip */
/* USBAT Features */
#define USBAT_FEAT_ETEN 0x80 /* External trigger enable */
#define USBAT_FEAT_U1 0x08
#define USBAT_FEAT_U0 0x04
#define USBAT_FEAT_ET1 0x02
#define USBAT_FEAT_ET2 0x01
struct usbat_info {
int devicetype;
/* Used for Flash readers only */
unsigned long sectors; /* total sector count */
unsigned long ssize; /* sector size in bytes */
unsigned char sense_key;
unsigned long sense_asc; /* additional sense code */
unsigned long sense_ascq; /* additional sense code qualifier */
};
#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);
static int init_usbat_cd(struct us_data *us);
static int init_usbat_flash(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 usbat_usb_ids[] = {
# include "unusual_usbat.h"
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, usbat_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 usbat_unusual_dev_list[] = {
# include "unusual_usbat.h"
{ } /* Terminating entry */
};
#undef UNUSUAL_DEV
/*
* Convenience function to produce an ATA read/write sectors command
* Use cmd=0x20 for read, cmd=0x30 for write
*/
static void usbat_pack_ata_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,
void* buf,
unsigned int len,
int use_sg)
{
if (len == 0)
return USB_STOR_XFER_GOOD;
usb_stor_dbg(us, "len = %d\n", len);
return usb_stor_bulk_transfer_sg(us, us->recv_bulk_pipe, buf, len, use_sg, NULL);
}
/*
* Convenience function to perform a bulk write
*/
static int usbat_bulk_write(struct us_data *us,
void* buf,
unsigned int len,
int use_sg)
{
if (len == 0)
return USB_STOR_XFER_GOOD;
usb_stor_dbg(us, "len = %d\n", len);
return usb_stor_bulk_transfer_sg(us, us->send_bulk_pipe, buf, len, use_sg, 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);
usb_stor_dbg(us, "0x%02X\n", *status);
return rc;
}
/*
* Check the device status
*/
static int usbat_check_status(struct us_data *us)
{
unsigned char *reply = us->iobuf;
int rc;
rc = usbat_get_status(us, reply);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_FAILED;
/* error/check condition (0x51 is ok) */
if (*reply & 0x01 && *reply != 0x51)
return USB_STOR_TRANSPORT_FAILED;
/* device fault */
if (*reply & 0x20)
return USB_STOR_TRANSPORT_FAILED;
return USB_STOR_TRANSPORT_GOOD;
}
/*
* Stores critical information in internal registers in preparation 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 */
usb_stor_dbg(us, "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 */
}
usb_stor_dbg(us, "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,
void* buf,
unsigned short len,
int use_sg)
{
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, buf, len, use_sg);
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,
void* buf,
unsigned short len,
int minutes,
int use_sg)
{
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, buf, len, use_sg);
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,
void *buf,
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, 0);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
}
result = usb_stor_bulk_transfer_sg(us,
pipe, buf, 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;
usb_stor_dbg(us, "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);
}
usb_stor_dbg(us, "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, 0);
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,
void* buffer,
int len,
int use_sg)
{
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, use_sg);
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,
void* buffer,
int len,
int use_sg)
{
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, use_sg);
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);
usb_stor_dbg(us, "UIO register reads %02X\n", *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(struct us_data *us,
unsigned char *uio)
{
if (*uio & USBAT_UIO_UI0) {
usb_stor_dbg(us, "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(struct us_data *us,
unsigned char *uio)
{
if (*uio & USBAT_UIO_0) {
usb_stor_dbg(us, "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(us, 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(us, 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;
msleep(500);
/*
* In attempt to distinguish between HP CDRW's and Flash readers, we now
* execute the IDENTIFY PACKET DEVICE command. On ATA devices (i.e. flash
* readers), this command should fail with error. On ATAPI devices (i.e.
* CDROM drives), it should succeed.
*/
rc = usbat_write(us, USBAT_ATA, USBAT_ATA_CMD, 0xA1);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
rc = usbat_get_status(us, &status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
/* Check for error bit, or if the command 'fell through' */
if (status == 0xA1 || !(status & 0x01)) {
/* Device is HP 8200 */
usb_stor_dbg(us, "Detected HP8200 CDRW\n");
info->devicetype = USBAT_DEV_HP8200;
} else {
/* Device is a CompactFlash reader/writer */
usb_stor_dbg(us, "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 devicetype)
{
if (!info->devicetype)
info->devicetype = devicetype;
if (!info->devicetype)
usbat_identify_device(us, info);
switch (info->devicetype) {
default:
return USB_STOR_TRANSPORT_ERROR;
case USBAT_DEV_HP8200:
us->transport = usbat_hp8200e_transport;
break;
case USBAT_DEV_FLASH:
us->transport = usbat_flash_transport;
break;
}
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;
/* ATA command : IDENTIFY DEVICE */
rc = usbat_multiple_write(us, registers, command, 3);
if (rc != USB_STOR_XFER_GOOD) {
usb_stor_dbg(us, "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, 0);
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_offset = 0;
struct scatterlist *sg = NULL;
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;
/* ATA command 0x20 (READ SECTORS) */
usbat_pack_ata_sector_cmd(command, thistime, sector, 0x20);
/* Write/execute ATA 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, 0);
if (result != USB_STOR_TRANSPORT_GOOD)
goto leave;
usb_stor_dbg(us, "%d bytes\n", len);
/* Store the data in the transfer buffer */
usb_stor_access_xfer_buf(buffer, len, us->srb,
&sg, &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_offset = 0;
struct scatterlist *sg = NULL;
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 the device
* supports beyond 24-bit addressing. It's kind of hard to test
* since it requires > 8GB media.
*/
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, &sg_offset, FROM_XFER_BUF);
/* ATA command 0x30 (WRITE SECTORS) */
usbat_pack_ata_sector_cmd(command, thistime, sector, 0x30);
/* Write/execute ATA 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, 0);
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_offset = 0;
struct scatterlist *sg = NULL;
usb_stor_dbg(us, "transfersize %d\n", srb->transfersize);
if (scsi_bufflen(srb) < 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,
scsi_sglist(srb),
scsi_bufflen(srb), scsi_sg_count(srb), 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];
usb_stor_dbg(us, "GPCMD_READ_CD: len %d\n", len);
srb->transfersize = scsi_bufflen(srb)/len;
}
if (!srb->transfersize) {
srb->transfersize = 2048; /* A guess */
usb_stor_dbg(us, "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;
usb_stor_dbg(us, "Max read is %d bytes\n", len);
len = min(len, scsi_bufflen(srb));
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;
while (transferred != scsi_bufflen(srb)) {
if (len > scsi_bufflen(srb) - transferred)
len = scsi_bufflen(srb) - 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, &sg_offset, TO_XFER_BUF);
/* Update the amount transferred and the sector number */
transferred += len;
sector += len / srb->transfersize;
} /* while transferred != scsi_bufflen(srb) */
kfree(buffer);
return result;
}
static int usbat_select_and_test_registers(struct us_data *us)
{
int selector;
unsigned char *status = us->iobuf;
/* try device = master, then device = slave. */
for (selector = 0xA0; selector <= 0xB0; selector += 0x10) {
if (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
*/
static int init_usbat(struct us_data *us, int devicetype)
{
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 = kzalloc(sizeof(struct usbat_info), GFP_NOIO);
if (!us->extra)
return 1;
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;
usb_stor_dbg(us, "INIT 1\n");
msleep(2000);
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
usb_stor_dbg(us, "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;
usb_stor_dbg(us, "INIT 3\n");
rc = usbat_select_and_test_registers(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
usb_stor_dbg(us, "INIT 4\n");
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
usb_stor_dbg(us, "INIT 5\n");
/* Enable peripheral control signals and card detect */
rc = usbat_device_enable_cdt(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
usb_stor_dbg(us, "INIT 6\n");
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
usb_stor_dbg(us, "INIT 7\n");
msleep(1400);
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
usb_stor_dbg(us, "INIT 8\n");
rc = usbat_select_and_test_registers(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
usb_stor_dbg(us, "INIT 9\n");
/* At this point, we need to detect which device we are using */
if (usbat_set_transport(us, info, devicetype))
return USB_STOR_TRANSPORT_ERROR;
usb_stor_dbg(us, "INIT 10\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;
usb_stor_dbg(us, "INIT 11\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;
len = scsi_bufflen(srb);
/* 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);
usb_stor_dbg(us, "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,
scsi_sglist(srb),
len, scsi_sg_count(srb), 10);
if (result == USB_STOR_TRANSPORT_GOOD) {
transferred += len;
usb_stor_dbg(us, "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) {
usb_stor_dbg(us, "Error: len = %08X... what do I do now?\n",
len);
return USB_STOR_TRANSPORT_ERROR;
}
result = usbat_multiple_write(us, registers, data, 7);
if (result != 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!!!
*/
result = usbat_write_block(us, USBAT_ATA, srb->cmnd, 12,
srb->cmnd[0] == GPCMD_BLANK ? 75 : 10, 0);
if (result != 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, scsi_sglist(srb), len,
scsi_sg_count(srb));
}
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) {
usb_stor_dbg(us, "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;
/* hard coded 512 byte sectors as per ATA spec */
info->ssize = 0x200;
usb_stor_dbg(us, "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) {
usb_stor_dbg(us, "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]));
usb_stor_dbg(us, "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]));
usb_stor_dbg(us, "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]));
usb_stor_dbg(us, "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]));
usb_stor_dbg(us, "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) {
usb_stor_dbg(us, "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) {
usb_stor_dbg(us, "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;
}
usb_stor_dbg(us, "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;
}
static int init_usbat_cd(struct us_data *us)
{
return init_usbat(us, USBAT_DEV_HP8200);
}
static int init_usbat_flash(struct us_data *us)
{
return init_usbat(us, USBAT_DEV_FLASH);
}
static int usbat_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 - usbat_usb_ids) + usbat_unusual_dev_list);
if (result)
return result;
/* The actual transport will be determined later by the
* initialization routine; this is just a placeholder.
*/
us->transport_name = "Shuttle USBAT";
us->transport = usbat_flash_transport;
us->transport_reset = usb_stor_CB_reset;
us->max_lun = 1;
result = usb_stor_probe2(us);
return result;
}
static struct usb_driver usbat_driver = {
.name = "ums-usbat",
.probe = usbat_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 = usbat_usb_ids,
.soft_unbind = 1,
.no_dynamic_id = 1,
};
module_usb_driver(usbat_driver);
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