+++ /dev/null
-/* 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/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 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;
-
- US_DEBUGP("usbat_bulk_read: 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;
-
- US_DEBUGP("usbat_bulk_write: 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);
-
- 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;
-
- 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 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,
- 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;
-
- 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, 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);
-
- 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;
- 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 */
- 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 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) {
- 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, 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;
-
- 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, &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;
-
- US_DEBUGP("handle_read10: 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];
- US_DEBUGP("handle_read10: GPCMD_READ_CD: len %d\n", len);
- srb->transfersize = scsi_bufflen(srb)/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, 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) {
- US_DEBUGP("init_usbat: Gah! Can't allocate storage for usbat info struct!\n");
- 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;
-
- 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");
-
- rc = usbat_select_and_test_registers(us);
- if (rc != USB_STOR_TRANSPORT_GOOD)
- return rc;
-
- US_DEBUGP("INIT 4\n");
-
- rc = usbat_read_user_io(us, status);
- if (rc != USB_STOR_XFER_GOOD)
- return USB_STOR_TRANSPORT_ERROR;
-
- US_DEBUGP("INIT 5\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 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");
-
- msleep(1400);
-
- rc = usbat_read_user_io(us, status);
- if (rc != USB_STOR_XFER_GOOD)
- return USB_STOR_TRANSPORT_ERROR;
-
- US_DEBUGP("INIT 8\n");
-
- rc = usbat_select_and_test_registers(us);
- if (rc != USB_STOR_TRANSPORT_GOOD)
- return rc;
-
- US_DEBUGP("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;
-
- US_DEBUGP("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;
-
- US_DEBUGP("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);
- 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,
- scsi_sglist(srb),
- len, scsi_sg_count(srb), 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), 0) !=
- 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) {
- 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;
-
- /* hard coded 512 byte sectors as per ATA spec */
- info->ssize = 0x200;
- 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;
-}
-
-int init_usbat_cd(struct us_data *us)
-{
- return init_usbat(us, USBAT_DEV_HP8200);
-}
-
-
-int init_usbat_flash(struct us_data *us)
-{
- return init_usbat(us, USBAT_DEV_FLASH);
-}
-
-int init_usbat_probe(struct us_data *us)
-{
- return init_usbat(us, 0);
-}
-
-/*
- * 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, 0))
- return USB_STOR_TRANSPORT_ERROR;
-
- return us->transport(srb, us);
-}
projects / kernel-power / blobdiff