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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/usb/storage/shuttle_usbat.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/usb/storage/shuttle_usbat.c')
-rw-r--r--drivers/usb/storage/shuttle_usbat.c1712
1 files changed, 1712 insertions, 0 deletions
diff --git a/drivers/usb/storage/shuttle_usbat.c b/drivers/usb/storage/shuttle_usbat.c
new file mode 100644
index 00000000000..7eff03d9b04
--- /dev/null
+++ b/drivers/usb/storage/shuttle_usbat.c
@@ -0,0 +1,1712 @@
+/* Driver for SCM Microsystems USB-ATAPI cable
+ *
+ * $Id: shuttle_usbat.c,v 1.17 2002/04/22 03:39:43 mdharm Exp $
+ *
+ * Current development and maintenance by:
+ * (c) 2000, 2001 Robert Baruch (autophile@starband.net)
+ * (c) 2004, 2005 Daniel Drake <dsd@gentoo.org>
+ *
+ * Developed with the assistance of:
+ * (c) 2002 Alan Stern <stern@rowland.org>
+ *
+ * Flash support based on earlier work by:
+ * (c) 2002 Thomas Kreiling <usbdev@sm04.de>
+ *
+ * Many originally ATAPI devices were slightly modified to meet the USB
+ * market by using some kind of translation from ATAPI to USB on the host,
+ * and the peripheral would translate from USB back to ATAPI.
+ *
+ * SCM Microsystems (www.scmmicro.com) makes a device, sold to OEM's only,
+ * which does the USB-to-ATAPI conversion. By obtaining the data sheet on
+ * their device under nondisclosure agreement, I have been able to write
+ * this driver for Linux.
+ *
+ * The chip used in the device can also be used for EPP and ISA translation
+ * as well. This driver is only guaranteed to work with the ATAPI
+ * translation.
+ *
+ * See the Kconfig help text for a list of devices known to be supported by
+ * this driver.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/cdrom.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include "usb.h"
+#include "transport.h"
+#include "protocol.h"
+#include "debug.h"
+#include "shuttle_usbat.h"
+
+#define short_pack(LSB,MSB) ( ((u16)(LSB)) | ( ((u16)(MSB))<<8 ) )
+#define LSB_of(s) ((s)&0xFF)
+#define MSB_of(s) ((s)>>8)
+
+static int transferred = 0;
+
+static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us);
+static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us);
+
+/*
+ * Convenience function to produce an ATAPI read/write sectors command
+ * Use cmd=0x20 for read, cmd=0x30 for write
+ */
+static void usbat_pack_atapi_sector_cmd(unsigned char *buf,
+ unsigned char thistime,
+ u32 sector, unsigned char cmd)
+{
+ buf[0] = 0;
+ buf[1] = thistime;
+ buf[2] = sector & 0xFF;
+ buf[3] = (sector >> 8) & 0xFF;
+ buf[4] = (sector >> 16) & 0xFF;
+ buf[5] = 0xE0 | ((sector >> 24) & 0x0F);
+ buf[6] = cmd;
+}
+
+/*
+ * Convenience function to get the device type (flash or hp8200)
+ */
+static int usbat_get_device_type(struct us_data *us)
+{
+ return ((struct usbat_info*)us->extra)->devicetype;
+}
+
+/*
+ * Read a register from the device
+ */
+static int usbat_read(struct us_data *us,
+ unsigned char access,
+ unsigned char reg,
+ unsigned char *content)
+{
+ return usb_stor_ctrl_transfer(us,
+ us->recv_ctrl_pipe,
+ access | USBAT_CMD_READ_REG,
+ 0xC0,
+ (u16)reg,
+ 0,
+ content,
+ 1);
+}
+
+/*
+ * Write to a register on the device
+ */
+static int usbat_write(struct us_data *us,
+ unsigned char access,
+ unsigned char reg,
+ unsigned char content)
+{
+ return usb_stor_ctrl_transfer(us,
+ us->send_ctrl_pipe,
+ access | USBAT_CMD_WRITE_REG,
+ 0x40,
+ short_pack(reg, content),
+ 0,
+ NULL,
+ 0);
+}
+
+/*
+ * Convenience function to perform a bulk read
+ */
+static int usbat_bulk_read(struct us_data *us,
+ unsigned char *data,
+ unsigned int len)
+{
+ if (len == 0)
+ return USB_STOR_XFER_GOOD;
+
+ US_DEBUGP("usbat_bulk_read: len = %d\n", len);
+ return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, data, len, NULL);
+}
+
+/*
+ * Convenience function to perform a bulk write
+ */
+static int usbat_bulk_write(struct us_data *us,
+ unsigned char *data,
+ unsigned int len)
+{
+ if (len == 0)
+ return USB_STOR_XFER_GOOD;
+
+ US_DEBUGP("usbat_bulk_write: len = %d\n", len);
+ return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, data, len, NULL);
+}
+
+/*
+ * Some USBAT-specific commands can only be executed over a command transport
+ * This transport allows one (len=8) or two (len=16) vendor-specific commands
+ * to be executed.
+ */
+static int usbat_execute_command(struct us_data *us,
+ unsigned char *commands,
+ unsigned int len)
+{
+ return usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
+ USBAT_CMD_EXEC_CMD, 0x40, 0, 0,
+ commands, len);
+}
+
+/*
+ * Read the status register
+ */
+static int usbat_get_status(struct us_data *us, unsigned char *status)
+{
+ int rc;
+ rc = usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status);
+
+ US_DEBUGP("usbat_get_status: 0x%02X\n", (unsigned short) (*status));
+ return rc;
+}
+
+/*
+ * Check the device status
+ */
+static int usbat_check_status(struct us_data *us)
+{
+ unsigned char *reply = us->iobuf;
+ int rc;
+
+ if (!us)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ rc = usbat_get_status(us, reply);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_FAILED;
+
+ if (*reply & 0x01 && *reply != 0x51) // error/check condition (0x51 is ok)
+ return USB_STOR_TRANSPORT_FAILED;
+
+ if (*reply & 0x20) // device fault
+ return USB_STOR_TRANSPORT_FAILED;
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Stores critical information in internal registers in prepartion for the execution
+ * of a conditional usbat_read_blocks or usbat_write_blocks call.
+ */
+static int usbat_set_shuttle_features(struct us_data *us,
+ unsigned char external_trigger,
+ unsigned char epp_control,
+ unsigned char mask_byte,
+ unsigned char test_pattern,
+ unsigned char subcountH,
+ unsigned char subcountL)
+{
+ unsigned char *command = us->iobuf;
+
+ command[0] = 0x40;
+ command[1] = USBAT_CMD_SET_FEAT;
+
+ // The only bit relevant to ATA access is bit 6
+ // which defines 8 bit data access (set) or 16 bit (unset)
+ command[2] = epp_control;
+
+ // If FCQ is set in the qualifier (defined in R/W cmd), then bits U0, U1,
+ // ET1 and ET2 define an external event to be checked for on event of a
+ // _read_blocks or _write_blocks operation. The read/write will not take
+ // place unless the defined trigger signal is active.
+ command[3] = external_trigger;
+
+ // The resultant byte of the mask operation (see mask_byte) is compared for
+ // equivalence with this test pattern. If equal, the read/write will take
+ // place.
+ command[4] = test_pattern;
+
+ // This value is logically ANDed with the status register field specified
+ // in the read/write command.
+ command[5] = mask_byte;
+
+ // If ALQ is set in the qualifier, this field contains the address of the
+ // registers where the byte count should be read for transferring the data.
+ // If ALQ is not set, then this field contains the number of bytes to be
+ // transferred.
+ command[6] = subcountL;
+ command[7] = subcountH;
+
+ return usbat_execute_command(us, command, 8);
+}
+
+/*
+ * Block, waiting for an ATA device to become not busy or to report
+ * an error condition.
+ */
+static int usbat_wait_not_busy(struct us_data *us, int minutes)
+{
+ int i;
+ int result;
+ unsigned char *status = us->iobuf;
+
+ /* Synchronizing cache on a CDR could take a heck of a long time,
+ * but probably not more than 10 minutes or so. On the other hand,
+ * doing a full blank on a CDRW at speed 1 will take about 75
+ * minutes!
+ */
+
+ for (i=0; i<1200+minutes*60; i++) {
+
+ result = usbat_get_status(us, status);
+
+ if (result!=USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+ if (*status & 0x01) { // check condition
+ result = usbat_read(us, USBAT_ATA, 0x10, status);
+ return USB_STOR_TRANSPORT_FAILED;
+ }
+ if (*status & 0x20) // device fault
+ return USB_STOR_TRANSPORT_FAILED;
+
+ if ((*status & 0x80)==0x00) { // not busy
+ US_DEBUGP("Waited not busy for %d steps\n", i);
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (i<500)
+ msleep(10); // 5 seconds
+ else if (i<700)
+ msleep(50); // 10 seconds
+ else if (i<1200)
+ msleep(100); // 50 seconds
+ else
+ msleep(1000); // X minutes
+ }
+
+ US_DEBUGP("Waited not busy for %d minutes, timing out.\n",
+ minutes);
+ return USB_STOR_TRANSPORT_FAILED;
+}
+
+/*
+ * Read block data from the data register
+ */
+static int usbat_read_block(struct us_data *us,
+ unsigned char *content,
+ unsigned short len)
+{
+ int result;
+ unsigned char *command = us->iobuf;
+
+ if (!len)
+ return USB_STOR_TRANSPORT_GOOD;
+
+ command[0] = 0xC0;
+ command[1] = USBAT_ATA | USBAT_CMD_READ_BLOCK;
+ command[2] = USBAT_ATA_DATA;
+ command[3] = 0;
+ command[4] = 0;
+ command[5] = 0;
+ command[6] = LSB_of(len);
+ command[7] = MSB_of(len);
+
+ result = usbat_execute_command(us, command, 8);
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ result = usbat_bulk_read(us, content, len);
+ return (result == USB_STOR_XFER_GOOD ?
+ USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_ERROR);
+}
+
+/*
+ * Write block data via the data register
+ */
+static int usbat_write_block(struct us_data *us,
+ unsigned char access,
+ unsigned char *content,
+ unsigned short len,
+ int minutes)
+{
+ int result;
+ unsigned char *command = us->iobuf;
+
+ if (!len)
+ return USB_STOR_TRANSPORT_GOOD;
+
+ command[0] = 0x40;
+ command[1] = access | USBAT_CMD_WRITE_BLOCK;
+ command[2] = USBAT_ATA_DATA;
+ command[3] = 0;
+ command[4] = 0;
+ command[5] = 0;
+ command[6] = LSB_of(len);
+ command[7] = MSB_of(len);
+
+ result = usbat_execute_command(us, command, 8);
+
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ result = usbat_bulk_write(us, content, len);
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ return usbat_wait_not_busy(us, minutes);
+}
+
+/*
+ * Process read and write requests
+ */
+static int usbat_hp8200e_rw_block_test(struct us_data *us,
+ unsigned char access,
+ unsigned char *registers,
+ unsigned char *data_out,
+ unsigned short num_registers,
+ unsigned char data_reg,
+ unsigned char status_reg,
+ unsigned char timeout,
+ unsigned char qualifier,
+ int direction,
+ unsigned char *content,
+ unsigned short len,
+ int use_sg,
+ int minutes)
+{
+ int result;
+ unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
+ us->recv_bulk_pipe : us->send_bulk_pipe;
+
+ unsigned char *command = us->iobuf;
+ int i, j;
+ int cmdlen;
+ unsigned char *data = us->iobuf;
+ unsigned char *status = us->iobuf;
+
+ BUG_ON(num_registers > US_IOBUF_SIZE/2);
+
+ for (i=0; i<20; i++) {
+
+ /*
+ * The first time we send the full command, which consists
+ * of downloading the SCSI command followed by downloading
+ * the data via a write-and-test. Any other time we only
+ * send the command to download the data -- the SCSI command
+ * is still 'active' in some sense in the device.
+ *
+ * We're only going to try sending the data 10 times. After
+ * that, we just return a failure.
+ */
+
+ if (i==0) {
+ cmdlen = 16;
+ // Write to multiple registers
+ // Not really sure the 0x07, 0x17, 0xfc, 0xe7 is necessary here,
+ // but that's what came out of the trace every single time.
+ command[0] = 0x40;
+ command[1] = access | USBAT_CMD_WRITE_REGS;
+ command[2] = 0x07;
+ command[3] = 0x17;
+ command[4] = 0xFC;
+ command[5] = 0xE7;
+ command[6] = LSB_of(num_registers*2);
+ command[7] = MSB_of(num_registers*2);
+ } else
+ cmdlen = 8;
+
+ // Conditionally read or write blocks
+ command[cmdlen-8] = (direction==DMA_TO_DEVICE ? 0x40 : 0xC0);
+ command[cmdlen-7] = access |
+ (direction==DMA_TO_DEVICE ?
+ USBAT_CMD_COND_WRITE_BLOCK : USBAT_CMD_COND_READ_BLOCK);
+ command[cmdlen-6] = data_reg;
+ command[cmdlen-5] = status_reg;
+ command[cmdlen-4] = timeout;
+ command[cmdlen-3] = qualifier;
+ command[cmdlen-2] = LSB_of(len);
+ command[cmdlen-1] = MSB_of(len);
+
+ result = usbat_execute_command(us, command, cmdlen);
+
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (i==0) {
+
+ for (j=0; j<num_registers; j++) {
+ data[j<<1] = registers[j];
+ data[1+(j<<1)] = data_out[j];
+ }
+
+ result = usbat_bulk_write(us, data, num_registers*2);
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ }
+
+
+ //US_DEBUGP("Transfer %s %d bytes, sg buffers %d\n",
+ // direction == DMA_TO_DEVICE ? "out" : "in",
+ // len, use_sg);
+
+ result = usb_stor_bulk_transfer_sg(us,
+ pipe, content, len, use_sg, NULL);
+
+ /*
+ * If we get a stall on the bulk download, we'll retry
+ * the bulk download -- but not the SCSI command because
+ * in some sense the SCSI command is still 'active' and
+ * waiting for the data. Don't ask me why this should be;
+ * I'm only following what the Windoze driver did.
+ *
+ * Note that a stall for the test-and-read/write command means
+ * that the test failed. In this case we're testing to make
+ * sure that the device is error-free
+ * (i.e. bit 0 -- CHK -- of status is 0). The most likely
+ * hypothesis is that the USBAT chip somehow knows what
+ * the device will accept, but doesn't give the device any
+ * data until all data is received. Thus, the device would
+ * still be waiting for the first byte of data if a stall
+ * occurs, even if the stall implies that some data was
+ * transferred.
+ */
+
+ if (result == USB_STOR_XFER_SHORT ||
+ result == USB_STOR_XFER_STALLED) {
+
+ /*
+ * If we're reading and we stalled, then clear
+ * the bulk output pipe only the first time.
+ */
+
+ if (direction==DMA_FROM_DEVICE && i==0) {
+ if (usb_stor_clear_halt(us,
+ us->send_bulk_pipe) < 0)
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ /*
+ * Read status: is the device angry, or just busy?
+ */
+
+ result = usbat_read(us, USBAT_ATA,
+ direction==DMA_TO_DEVICE ?
+ USBAT_ATA_STATUS : USBAT_ATA_ALTSTATUS,
+ status);
+
+ if (result!=USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+ if (*status & 0x01) // check condition
+ return USB_STOR_TRANSPORT_FAILED;
+ if (*status & 0x20) // device fault
+ return USB_STOR_TRANSPORT_FAILED;
+
+ US_DEBUGP("Redoing %s\n",
+ direction==DMA_TO_DEVICE ? "write" : "read");
+
+ } else if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+ else
+ return usbat_wait_not_busy(us, minutes);
+
+ }
+
+ US_DEBUGP("Bummer! %s bulk data 20 times failed.\n",
+ direction==DMA_TO_DEVICE ? "Writing" : "Reading");
+
+ return USB_STOR_TRANSPORT_FAILED;
+}
+
+/*
+ * Write to multiple registers:
+ * Allows us to write specific data to any registers. The data to be written
+ * gets packed in this sequence: reg0, data0, reg1, data1, ..., regN, dataN
+ * which gets sent through bulk out.
+ * Not designed for large transfers of data!
+ */
+static int usbat_multiple_write(struct us_data *us,
+ unsigned char *registers,
+ unsigned char *data_out,
+ unsigned short num_registers)
+{
+ int i, result;
+ unsigned char *data = us->iobuf;
+ unsigned char *command = us->iobuf;
+
+ BUG_ON(num_registers > US_IOBUF_SIZE/2);
+
+ // Write to multiple registers, ATA access
+ command[0] = 0x40;
+ command[1] = USBAT_ATA | USBAT_CMD_WRITE_REGS;
+
+ // No relevance
+ command[2] = 0;
+ command[3] = 0;
+ command[4] = 0;
+ command[5] = 0;
+
+ // Number of bytes to be transferred (incl. addresses and data)
+ command[6] = LSB_of(num_registers*2);
+ command[7] = MSB_of(num_registers*2);
+
+ // The setup command
+ result = usbat_execute_command(us, command, 8);
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ // Create the reg/data, reg/data sequence
+ for (i=0; i<num_registers; i++) {
+ data[i<<1] = registers[i];
+ data[1+(i<<1)] = data_out[i];
+ }
+
+ // Send the data
+ result = usbat_bulk_write(us, data, num_registers*2);
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (usbat_get_device_type(us) == USBAT_DEV_HP8200)
+ return usbat_wait_not_busy(us, 0);
+ else
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Conditionally read blocks from device:
+ * Allows us to read blocks from a specific data register, based upon the
+ * condition that a status register can be successfully masked with a status
+ * qualifier. If this condition is not initially met, the read will wait
+ * up until a maximum amount of time has elapsed, as specified by timeout.
+ * The read will start when the condition is met, otherwise the command aborts.
+ *
+ * The qualifier defined here is not the value that is masked, it defines
+ * conditions for the write to take place. The actual masked qualifier (and
+ * other related details) are defined beforehand with _set_shuttle_features().
+ */
+static int usbat_read_blocks(struct us_data *us,
+ unsigned char *buffer,
+ int len)
+{
+ int result;
+ unsigned char *command = us->iobuf;
+
+ command[0] = 0xC0;
+ command[1] = USBAT_ATA | USBAT_CMD_COND_READ_BLOCK;
+ command[2] = USBAT_ATA_DATA;
+ command[3] = USBAT_ATA_STATUS;
+ command[4] = 0xFD; // Timeout (ms);
+ command[5] = USBAT_QUAL_FCQ;
+ command[6] = LSB_of(len);
+ command[7] = MSB_of(len);
+
+ // Multiple block read setup command
+ result = usbat_execute_command(us, command, 8);
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_FAILED;
+
+ // Read the blocks we just asked for
+ result = usbat_bulk_read(us, buffer, len);
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_FAILED;
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Conditionally write blocks to device:
+ * Allows us to write blocks to a specific data register, based upon the
+ * condition that a status register can be successfully masked with a status
+ * qualifier. If this condition is not initially met, the write will wait
+ * up until a maximum amount of time has elapsed, as specified by timeout.
+ * The read will start when the condition is met, otherwise the command aborts.
+ *
+ * The qualifier defined here is not the value that is masked, it defines
+ * conditions for the write to take place. The actual masked qualifier (and
+ * other related details) are defined beforehand with _set_shuttle_features().
+ */
+static int usbat_write_blocks(struct us_data *us,
+ unsigned char *buffer,
+ int len)
+{
+ int result;
+ unsigned char *command = us->iobuf;
+
+ command[0] = 0x40;
+ command[1] = USBAT_ATA | USBAT_CMD_COND_WRITE_BLOCK;
+ command[2] = USBAT_ATA_DATA;
+ command[3] = USBAT_ATA_STATUS;
+ command[4] = 0xFD; // Timeout (ms)
+ command[5] = USBAT_QUAL_FCQ;
+ command[6] = LSB_of(len);
+ command[7] = MSB_of(len);
+
+ // Multiple block write setup command
+ result = usbat_execute_command(us, command, 8);
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_FAILED;
+
+ // Write the data
+ result = usbat_bulk_write(us, buffer, len);
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_FAILED;
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Read the User IO register
+ */
+static int usbat_read_user_io(struct us_data *us, unsigned char *data_flags)
+{
+ int result;
+
+ result = usb_stor_ctrl_transfer(us,
+ us->recv_ctrl_pipe,
+ USBAT_CMD_UIO,
+ 0xC0,
+ 0,
+ 0,
+ data_flags,
+ USBAT_UIO_READ);
+
+ US_DEBUGP("usbat_read_user_io: UIO register reads %02X\n", (unsigned short) (*data_flags));
+
+ return result;
+}
+
+/*
+ * Write to the User IO register
+ */
+static int usbat_write_user_io(struct us_data *us,
+ unsigned char enable_flags,
+ unsigned char data_flags)
+{
+ return usb_stor_ctrl_transfer(us,
+ us->send_ctrl_pipe,
+ USBAT_CMD_UIO,
+ 0x40,
+ short_pack(enable_flags, data_flags),
+ 0,
+ NULL,
+ USBAT_UIO_WRITE);
+}
+
+/*
+ * Reset the device
+ * Often needed on media change.
+ */
+static int usbat_device_reset(struct us_data *us)
+{
+ int rc;
+
+ // Reset peripheral, enable peripheral control signals
+ // (bring reset signal up)
+ rc = usbat_write_user_io(us,
+ USBAT_UIO_DRVRST | USBAT_UIO_OE1 | USBAT_UIO_OE0,
+ USBAT_UIO_EPAD | USBAT_UIO_1);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ // Enable peripheral control signals
+ // (bring reset signal down)
+ rc = usbat_write_user_io(us,
+ USBAT_UIO_OE1 | USBAT_UIO_OE0,
+ USBAT_UIO_EPAD | USBAT_UIO_1);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Enable card detect
+ */
+static int usbat_device_enable_cdt(struct us_data *us)
+{
+ int rc;
+
+ // Enable peripheral control signals and card detect
+ rc = usbat_write_user_io(us,
+ USBAT_UIO_ACKD | USBAT_UIO_OE1 | USBAT_UIO_OE0,
+ USBAT_UIO_EPAD | USBAT_UIO_1);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Determine if media is present.
+ */
+static int usbat_flash_check_media_present(unsigned char *uio)
+{
+ if (*uio & USBAT_UIO_UI0) {
+ US_DEBUGP("usbat_flash_check_media_present: no media detected\n");
+ return USBAT_FLASH_MEDIA_NONE;
+ }
+
+ return USBAT_FLASH_MEDIA_CF;
+}
+
+/*
+ * Determine if media has changed since last operation
+ */
+static int usbat_flash_check_media_changed(unsigned char *uio)
+{
+ if (*uio & USBAT_UIO_0) {
+ US_DEBUGP("usbat_flash_check_media_changed: media change detected\n");
+ return USBAT_FLASH_MEDIA_CHANGED;
+ }
+
+ return USBAT_FLASH_MEDIA_SAME;
+}
+
+/*
+ * Check for media change / no media and handle the situation appropriately
+ */
+static int usbat_flash_check_media(struct us_data *us,
+ struct usbat_info *info)
+{
+ int rc;
+ unsigned char *uio = us->iobuf;
+
+ rc = usbat_read_user_io(us, uio);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ // Check for media existance
+ rc = usbat_flash_check_media_present(uio);
+ if (rc == USBAT_FLASH_MEDIA_NONE) {
+ info->sense_key = 0x02;
+ info->sense_asc = 0x3A;
+ info->sense_ascq = 0x00;
+ return USB_STOR_TRANSPORT_FAILED;
+ }
+
+ // Check for media change
+ rc = usbat_flash_check_media_changed(uio);
+ if (rc == USBAT_FLASH_MEDIA_CHANGED) {
+
+ // Reset and re-enable card detect
+ rc = usbat_device_reset(us);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+ rc = usbat_device_enable_cdt(us);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ msleep(50);
+
+ rc = usbat_read_user_io(us, uio);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ info->sense_key = UNIT_ATTENTION;
+ info->sense_asc = 0x28;
+ info->sense_ascq = 0x00;
+ return USB_STOR_TRANSPORT_FAILED;
+ }
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Determine whether we are controlling a flash-based reader/writer,
+ * or a HP8200-based CD drive.
+ * Sets transport functions as appropriate.
+ */
+static int usbat_identify_device(struct us_data *us,
+ struct usbat_info *info)
+{
+ int rc;
+ unsigned char status;
+
+ if (!us || !info)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ rc = usbat_device_reset(us);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ /*
+ * By examining the device signature after a reset, we can identify
+ * whether the device supports the ATAPI packet interface.
+ * The flash-devices do not support this, whereas the HP CDRW's obviously
+ * do.
+ *
+ * This method is not ideal, but works because no other devices have been
+ * produced based on the USBAT/USBAT02.
+ *
+ * Section 9.1 of the ATAPI-4 spec states (amongst other things) that
+ * after a device reset, a Cylinder low of 0x14 indicates that the device
+ * does support packet commands.
+ */
+ rc = usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, &status);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("usbat_identify_device: Cylinder low is %02X\n", status);
+
+ if (status == 0x14) {
+ // Device is HP 8200
+ US_DEBUGP("usbat_identify_device: Detected HP8200 CDRW\n");
+ info->devicetype = USBAT_DEV_HP8200;
+ } else {
+ // Device is a CompactFlash reader/writer
+ US_DEBUGP("usbat_identify_device: Detected Flash reader/writer\n");
+ info->devicetype = USBAT_DEV_FLASH;
+ }
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Set the transport function based on the device type
+ */
+static int usbat_set_transport(struct us_data *us,
+ struct usbat_info *info)
+{
+ int rc;
+
+ if (!info->devicetype) {
+ rc = usbat_identify_device(us, info);
+ if (rc != USB_STOR_TRANSPORT_GOOD) {
+ US_DEBUGP("usbat_set_transport: Could not identify device\n");
+ return 1;
+ }
+ }
+
+ if (usbat_get_device_type(us) == USBAT_DEV_HP8200)
+ us->transport = usbat_hp8200e_transport;
+ else if (usbat_get_device_type(us) == USBAT_DEV_FLASH)
+ us->transport = usbat_flash_transport;
+
+ return 0;
+}
+
+/*
+ * Read the media capacity
+ */
+static int usbat_flash_get_sector_count(struct us_data *us,
+ struct usbat_info *info)
+{
+ unsigned char registers[3] = {
+ USBAT_ATA_SECCNT,
+ USBAT_ATA_DEVICE,
+ USBAT_ATA_CMD,
+ };
+ unsigned char command[3] = { 0x01, 0xA0, 0xEC };
+ unsigned char *reply;
+ unsigned char status;
+ int rc;
+
+ if (!us || !info)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ reply = kmalloc(512, GFP_NOIO);
+ if (!reply)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ // ATAPI command : IDENTIFY DEVICE
+ rc = usbat_multiple_write(us, registers, command, 3);
+ if (rc != USB_STOR_XFER_GOOD) {
+ US_DEBUGP("usbat_flash_get_sector_count: Gah! identify_device failed\n");
+ rc = USB_STOR_TRANSPORT_ERROR;
+ goto leave;
+ }
+
+ // Read device status
+ if (usbat_get_status(us, &status) != USB_STOR_XFER_GOOD) {
+ rc = USB_STOR_TRANSPORT_ERROR;
+ goto leave;
+ }
+
+ msleep(100);
+
+ // Read the device identification data
+ rc = usbat_read_block(us, reply, 512);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ goto leave;
+
+ info->sectors = ((u32)(reply[117]) << 24) |
+ ((u32)(reply[116]) << 16) |
+ ((u32)(reply[115]) << 8) |
+ ((u32)(reply[114]) );
+
+ rc = USB_STOR_TRANSPORT_GOOD;
+
+ leave:
+ kfree(reply);
+ return rc;
+}
+
+/*
+ * Read data from device
+ */
+static int usbat_flash_read_data(struct us_data *us,
+ struct usbat_info *info,
+ u32 sector,
+ u32 sectors)
+{
+ unsigned char registers[7] = {
+ USBAT_ATA_FEATURES,
+ USBAT_ATA_SECCNT,
+ USBAT_ATA_SECNUM,
+ USBAT_ATA_LBA_ME,
+ USBAT_ATA_LBA_HI,
+ USBAT_ATA_DEVICE,
+ USBAT_ATA_STATUS,
+ };
+ unsigned char command[7];
+ unsigned char *buffer;
+ unsigned char thistime;
+ unsigned int totallen, alloclen;
+ int len, result;
+ unsigned int sg_idx = 0, sg_offset = 0;
+
+ result = usbat_flash_check_media(us, info);
+ if (result != USB_STOR_TRANSPORT_GOOD)
+ return result;
+
+ // we're working in LBA mode. according to the ATA spec,
+ // we can support up to 28-bit addressing. I don't know if Jumpshot
+ // supports beyond 24-bit addressing. It's kind of hard to test
+ // since it requires > 8GB CF card.
+
+ if (sector > 0x0FFFFFFF)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ totallen = sectors * info->ssize;
+
+ // Since we don't read more than 64 KB at a time, we have to create
+ // a bounce buffer and move the data a piece at a time between the
+ // bounce buffer and the actual transfer buffer.
+
+ alloclen = min(totallen, 65536u);
+ buffer = kmalloc(alloclen, GFP_NOIO);
+ if (buffer == NULL)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ do {
+ // loop, never allocate or transfer more than 64k at once
+ // (min(128k, 255*info->ssize) is the real limit)
+ len = min(totallen, alloclen);
+ thistime = (len / info->ssize) & 0xff;
+
+ // ATAPI command 0x20 (READ SECTORS)
+ usbat_pack_atapi_sector_cmd(command, thistime, sector, 0x20);
+
+ // Write/execute ATAPI read command
+ result = usbat_multiple_write(us, registers, command, 7);
+ if (result != USB_STOR_TRANSPORT_GOOD)
+ goto leave;
+
+ // Read the data we just requested
+ result = usbat_read_blocks(us, buffer, len);
+ if (result != USB_STOR_TRANSPORT_GOOD)
+ goto leave;
+
+ US_DEBUGP("usbat_flash_read_data: %d bytes\n", len);
+
+ // Store the data in the transfer buffer
+ usb_stor_access_xfer_buf(buffer, len, us->srb,
+ &sg_idx, &sg_offset, TO_XFER_BUF);
+
+ sector += thistime;
+ totallen -= len;
+ } while (totallen > 0);
+
+ kfree(buffer);
+ return USB_STOR_TRANSPORT_GOOD;
+
+leave:
+ kfree(buffer);
+ return USB_STOR_TRANSPORT_ERROR;
+}
+
+/*
+ * Write data to device
+ */
+static int usbat_flash_write_data(struct us_data *us,
+ struct usbat_info *info,
+ u32 sector,
+ u32 sectors)
+{
+ unsigned char registers[7] = {
+ USBAT_ATA_FEATURES,
+ USBAT_ATA_SECCNT,
+ USBAT_ATA_SECNUM,
+ USBAT_ATA_LBA_ME,
+ USBAT_ATA_LBA_HI,
+ USBAT_ATA_DEVICE,
+ USBAT_ATA_STATUS,
+ };
+ unsigned char command[7];
+ unsigned char *buffer;
+ unsigned char thistime;
+ unsigned int totallen, alloclen;
+ int len, result;
+ unsigned int sg_idx = 0, sg_offset = 0;
+
+ result = usbat_flash_check_media(us, info);
+ if (result != USB_STOR_TRANSPORT_GOOD)
+ return result;
+
+ // we're working in LBA mode. according to the ATA spec,
+ // we can support up to 28-bit addressing. I don't know if Jumpshot
+ // supports beyond 24-bit addressing. It's kind of hard to test
+ // since it requires > 8GB CF card.
+
+ if (sector > 0x0FFFFFFF)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ totallen = sectors * info->ssize;
+
+ // Since we don't write more than 64 KB at a time, we have to create
+ // a bounce buffer and move the data a piece at a time between the
+ // bounce buffer and the actual transfer buffer.
+
+ alloclen = min(totallen, 65536u);
+ buffer = kmalloc(alloclen, GFP_NOIO);
+ if (buffer == NULL)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ do {
+ // loop, never allocate or transfer more than 64k at once
+ // (min(128k, 255*info->ssize) is the real limit)
+ len = min(totallen, alloclen);
+ thistime = (len / info->ssize) & 0xff;
+
+ // Get the data from the transfer buffer
+ usb_stor_access_xfer_buf(buffer, len, us->srb,
+ &sg_idx, &sg_offset, FROM_XFER_BUF);
+
+ // ATAPI command 0x30 (WRITE SECTORS)
+ usbat_pack_atapi_sector_cmd(command, thistime, sector, 0x30);
+
+ // Write/execute ATAPI write command
+ result = usbat_multiple_write(us, registers, command, 7);
+ if (result != USB_STOR_TRANSPORT_GOOD)
+ goto leave;
+
+ // Write the data
+ result = usbat_write_blocks(us, buffer, len);
+ if (result != USB_STOR_TRANSPORT_GOOD)
+ goto leave;
+
+ sector += thistime;
+ totallen -= len;
+ } while (totallen > 0);
+
+ kfree(buffer);
+ return result;
+
+leave:
+ kfree(buffer);
+ return USB_STOR_TRANSPORT_ERROR;
+}
+
+/*
+ * Squeeze a potentially huge (> 65535 byte) read10 command into
+ * a little ( <= 65535 byte) ATAPI pipe
+ */
+static int usbat_hp8200e_handle_read10(struct us_data *us,
+ unsigned char *registers,
+ unsigned char *data,
+ struct scsi_cmnd *srb)
+{
+ int result = USB_STOR_TRANSPORT_GOOD;
+ unsigned char *buffer;
+ unsigned int len;
+ unsigned int sector;
+ unsigned int sg_segment = 0;
+ unsigned int sg_offset = 0;
+
+ US_DEBUGP("handle_read10: transfersize %d\n",
+ srb->transfersize);
+
+ if (srb->request_bufflen < 0x10000) {
+
+ result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
+ registers, data, 19,
+ USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
+ (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
+ DMA_FROM_DEVICE,
+ srb->request_buffer,
+ srb->request_bufflen, srb->use_sg, 1);
+
+ return result;
+ }
+
+ /*
+ * Since we're requesting more data than we can handle in
+ * a single read command (max is 64k-1), we will perform
+ * multiple reads, but each read must be in multiples of
+ * a sector. Luckily the sector size is in srb->transfersize
+ * (see linux/drivers/scsi/sr.c).
+ */
+
+ if (data[7+0] == GPCMD_READ_CD) {
+ len = short_pack(data[7+9], data[7+8]);
+ len <<= 16;
+ len |= data[7+7];
+ US_DEBUGP("handle_read10: GPCMD_READ_CD: len %d\n", len);
+ srb->transfersize = srb->request_bufflen/len;
+ }
+
+ if (!srb->transfersize) {
+ srb->transfersize = 2048; /* A guess */
+ US_DEBUGP("handle_read10: transfersize 0, forcing %d\n",
+ srb->transfersize);
+ }
+
+ // Since we only read in one block at a time, we have to create
+ // a bounce buffer and move the data a piece at a time between the
+ // bounce buffer and the actual transfer buffer.
+
+ len = (65535/srb->transfersize) * srb->transfersize;
+ US_DEBUGP("Max read is %d bytes\n", len);
+ len = min(len, srb->request_bufflen);
+ buffer = kmalloc(len, GFP_NOIO);
+ if (buffer == NULL) // bloody hell!
+ return USB_STOR_TRANSPORT_FAILED;
+ sector = short_pack(data[7+3], data[7+2]);
+ sector <<= 16;
+ sector |= short_pack(data[7+5], data[7+4]);
+ transferred = 0;
+
+ sg_segment = 0; // for keeping track of where we are in
+ sg_offset = 0; // the scatter/gather list
+
+ while (transferred != srb->request_bufflen) {
+
+ if (len > srb->request_bufflen - transferred)
+ len = srb->request_bufflen - transferred;
+
+ data[3] = len&0xFF; // (cylL) = expected length (L)
+ data[4] = (len>>8)&0xFF; // (cylH) = expected length (H)
+
+ // Fix up the SCSI command sector and num sectors
+
+ data[7+2] = MSB_of(sector>>16); // SCSI command sector
+ data[7+3] = LSB_of(sector>>16);
+ data[7+4] = MSB_of(sector&0xFFFF);
+ data[7+5] = LSB_of(sector&0xFFFF);
+ if (data[7+0] == GPCMD_READ_CD)
+ data[7+6] = 0;
+ data[7+7] = MSB_of(len / srb->transfersize); // SCSI command
+ data[7+8] = LSB_of(len / srb->transfersize); // num sectors
+
+ result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
+ registers, data, 19,
+ USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
+ (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
+ DMA_FROM_DEVICE,
+ buffer,
+ len, 0, 1);
+
+ if (result != USB_STOR_TRANSPORT_GOOD)
+ break;
+
+ // Store the data in the transfer buffer
+ usb_stor_access_xfer_buf(buffer, len, srb,
+ &sg_segment, &sg_offset, TO_XFER_BUF);
+
+ // Update the amount transferred and the sector number
+
+ transferred += len;
+ sector += len / srb->transfersize;
+
+ } // while transferred != srb->request_bufflen
+
+ kfree(buffer);
+ return result;
+}
+
+static int usbat_select_and_test_registers(struct us_data *us)
+{
+ int selector;
+ unsigned char *status = us->iobuf;
+ unsigned char max_selector = 0xB0;
+ if (usbat_get_device_type(us) == USBAT_DEV_FLASH)
+ max_selector = 0xA0;
+
+ // try device = master, then device = slave.
+
+ for (selector = 0xA0; selector <= max_selector; selector += 0x10) {
+
+ if (usbat_get_device_type(us) == USBAT_DEV_HP8200 &&
+ usbat_write(us, USBAT_ATA, USBAT_ATA_DEVICE, selector) !=
+ USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status) !=
+ USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (usbat_read(us, USBAT_ATA, USBAT_ATA_DEVICE, status) !=
+ USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
+ USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
+ USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_ME, 0x55) !=
+ USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_HI, 0xAA) !=
+ USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
+ USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
+ USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Initialize the USBAT processor and the storage device
+ */
+int init_usbat(struct us_data *us)
+{
+ int rc;
+ struct usbat_info *info;
+ unsigned char subcountH = USBAT_ATA_LBA_HI;
+ unsigned char subcountL = USBAT_ATA_LBA_ME;
+ unsigned char *status = us->iobuf;
+
+ us->extra = kmalloc(sizeof(struct usbat_info), GFP_NOIO);
+ if (!us->extra) {
+ US_DEBUGP("init_usbat: Gah! Can't allocate storage for usbat info struct!\n");
+ return 1;
+ }
+ memset(us->extra, 0, sizeof(struct usbat_info));
+ info = (struct usbat_info *) (us->extra);
+
+ // Enable peripheral control signals
+ rc = usbat_write_user_io(us,
+ USBAT_UIO_OE1 | USBAT_UIO_OE0,
+ USBAT_UIO_EPAD | USBAT_UIO_1);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("INIT 1\n");
+
+ msleep(2000);
+
+ rc = usbat_read_user_io(us, status);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ US_DEBUGP("INIT 2\n");
+
+ rc = usbat_read_user_io(us, status);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ rc = usbat_read_user_io(us, status);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("INIT 3\n");
+
+ // At this point, we need to detect which device we are using
+ if (usbat_set_transport(us, info))
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("INIT 4\n");
+
+ if (usbat_get_device_type(us) == USBAT_DEV_HP8200) {
+ msleep(250);
+
+ // Write 0x80 to ISA port 0x3F
+ rc = usbat_write(us, USBAT_ISA, 0x3F, 0x80);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("INIT 5\n");
+
+ // Read ISA port 0x27
+ rc = usbat_read(us, USBAT_ISA, 0x27, status);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("INIT 6\n");
+
+ rc = usbat_read_user_io(us, status);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("INIT 7\n");
+ }
+
+ rc = usbat_select_and_test_registers(us);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ US_DEBUGP("INIT 8\n");
+
+ rc = usbat_read_user_io(us, status);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("INIT 9\n");
+
+ // Enable peripheral control signals and card detect
+ rc = usbat_device_enable_cdt(us);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ US_DEBUGP("INIT 10\n");
+
+ rc = usbat_read_user_io(us, status);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("INIT 11\n");
+
+ msleep(1400);
+
+ rc = usbat_read_user_io(us, status);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("INIT 12\n");
+
+ rc = usbat_select_and_test_registers(us);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ US_DEBUGP("INIT 13\n");
+
+ if (usbat_get_device_type(us) == USBAT_DEV_FLASH) {
+ subcountH = 0x02;
+ subcountL = 0x00;
+ }
+ rc = usbat_set_shuttle_features(us, (USBAT_FEAT_ETEN | USBAT_FEAT_ET2 | USBAT_FEAT_ET1),
+ 0x00, 0x88, 0x08, subcountH, subcountL);
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("INIT 14\n");
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Transport for the HP 8200e
+ */
+static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us)
+{
+ int result;
+ unsigned char *status = us->iobuf;
+ unsigned char registers[32];
+ unsigned char data[32];
+ unsigned int len;
+ int i;
+ char string[64];
+
+ len = srb->request_bufflen;
+
+ /* Send A0 (ATA PACKET COMMAND).
+ Note: I guess we're never going to get any of the ATA
+ commands... just ATA Packet Commands.
+ */
+
+ registers[0] = USBAT_ATA_FEATURES;
+ registers[1] = USBAT_ATA_SECCNT;
+ registers[2] = USBAT_ATA_SECNUM;
+ registers[3] = USBAT_ATA_LBA_ME;
+ registers[4] = USBAT_ATA_LBA_HI;
+ registers[5] = USBAT_ATA_DEVICE;
+ registers[6] = USBAT_ATA_CMD;
+ data[0] = 0x00;
+ data[1] = 0x00;
+ data[2] = 0x00;
+ data[3] = len&0xFF; // (cylL) = expected length (L)
+ data[4] = (len>>8)&0xFF; // (cylH) = expected length (H)
+ data[5] = 0xB0; // (device sel) = slave
+ data[6] = 0xA0; // (command) = ATA PACKET COMMAND
+
+ for (i=7; i<19; i++) {
+ registers[i] = 0x10;
+ data[i] = (i-7 >= srb->cmd_len) ? 0 : srb->cmnd[i-7];
+ }
+
+ result = usbat_get_status(us, status);
+ US_DEBUGP("Status = %02X\n", *status);
+ if (result != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+ if (srb->cmnd[0] == TEST_UNIT_READY)
+ transferred = 0;
+
+ if (srb->sc_data_direction == DMA_TO_DEVICE) {
+
+ result = usbat_hp8200e_rw_block_test(us, USBAT_ATA,
+ registers, data, 19,
+ USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD,
+ (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ),
+ DMA_TO_DEVICE,
+ srb->request_buffer,
+ len, srb->use_sg, 10);
+
+ if (result == USB_STOR_TRANSPORT_GOOD) {
+ transferred += len;
+ US_DEBUGP("Wrote %08X bytes\n", transferred);
+ }
+
+ return result;
+
+ } else if (srb->cmnd[0] == READ_10 ||
+ srb->cmnd[0] == GPCMD_READ_CD) {
+
+ return usbat_hp8200e_handle_read10(us, registers, data, srb);
+
+ }
+
+ if (len > 0xFFFF) {
+ US_DEBUGP("Error: len = %08X... what do I do now?\n",
+ len);
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ if ( (result = usbat_multiple_write(us,
+ registers, data, 7)) != USB_STOR_TRANSPORT_GOOD) {
+ return result;
+ }
+
+ // Write the 12-byte command header.
+
+ // If the command is BLANK then set the timer for 75 minutes.
+ // Otherwise set it for 10 minutes.
+
+ // NOTE: THE 8200 DOCUMENTATION STATES THAT BLANKING A CDRW
+ // AT SPEED 4 IS UNRELIABLE!!!
+
+ if ( (result = usbat_write_block(us,
+ USBAT_ATA, srb->cmnd, 12,
+ srb->cmnd[0]==GPCMD_BLANK ? 75 : 10)) !=
+ USB_STOR_TRANSPORT_GOOD) {
+ return result;
+ }
+
+ // If there is response data to be read in
+ // then do it here.
+
+ if (len != 0 && (srb->sc_data_direction == DMA_FROM_DEVICE)) {
+
+ // How many bytes to read in? Check cylL register
+
+ if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) !=
+ USB_STOR_XFER_GOOD) {
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ if (len > 0xFF) { // need to read cylH also
+ len = *status;
+ if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
+ USB_STOR_XFER_GOOD) {
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+ len += ((unsigned int) *status)<<8;
+ }
+ else
+ len = *status;
+
+
+ result = usbat_read_block(us, srb->request_buffer, len);
+
+ /* Debug-print the first 32 bytes of the transfer */
+
+ if (!srb->use_sg) {
+ string[0] = 0;
+ for (i=0; i<len && i<32; i++) {
+ sprintf(string+strlen(string), "%02X ",
+ ((unsigned char *)srb->request_buffer)[i]);
+ if ((i%16)==15) {
+ US_DEBUGP("%s\n", string);
+ string[0] = 0;
+ }
+ }
+ if (string[0]!=0)
+ US_DEBUGP("%s\n", string);
+ }
+ }
+
+ return result;
+}
+
+/*
+ * Transport for USBAT02-based CompactFlash and similar storage devices
+ */
+static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us)
+{
+ int rc;
+ struct usbat_info *info = (struct usbat_info *) (us->extra);
+ unsigned long block, blocks;
+ unsigned char *ptr = us->iobuf;
+ static unsigned char inquiry_response[36] = {
+ 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
+ };
+
+ if (srb->cmnd[0] == INQUIRY) {
+ US_DEBUGP("usbat_flash_transport: INQUIRY. Returning bogus response.\n");
+ memcpy(ptr, inquiry_response, sizeof(inquiry_response));
+ fill_inquiry_response(us, ptr, 36);
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (srb->cmnd[0] == READ_CAPACITY) {
+ rc = usbat_flash_check_media(us, info);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ rc = usbat_flash_get_sector_count(us, info);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
+ US_DEBUGP("usbat_flash_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
+ info->sectors, info->ssize);
+
+ // build the reply
+ // note: must return the sector number of the last sector,
+ // *not* the total number of sectors
+ ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
+ ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
+ usb_stor_set_xfer_buf(ptr, 8, srb);
+
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (srb->cmnd[0] == MODE_SELECT_10) {
+ US_DEBUGP("usbat_flash_transport: Gah! MODE_SELECT_10.\n");
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ if (srb->cmnd[0] == READ_10) {
+ block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+ ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
+
+ blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
+
+ US_DEBUGP("usbat_flash_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks);
+ return usbat_flash_read_data(us, info, block, blocks);
+ }
+
+ if (srb->cmnd[0] == READ_12) {
+ // I don't think we'll ever see a READ_12 but support it anyway...
+ block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+ ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
+
+ blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
+ ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
+
+ US_DEBUGP("usbat_flash_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks);
+ return usbat_flash_read_data(us, info, block, blocks);
+ }
+
+ if (srb->cmnd[0] == WRITE_10) {
+ block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+ ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
+
+ blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
+
+ US_DEBUGP("usbat_flash_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks);
+ return usbat_flash_write_data(us, info, block, blocks);
+ }
+
+ if (srb->cmnd[0] == WRITE_12) {
+ // I don't think we'll ever see a WRITE_12 but support it anyway...
+ block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+ ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
+
+ blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
+ ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
+
+ US_DEBUGP("usbat_flash_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks);
+ return usbat_flash_write_data(us, info, block, blocks);
+ }
+
+
+ if (srb->cmnd[0] == TEST_UNIT_READY) {
+ US_DEBUGP("usbat_flash_transport: TEST_UNIT_READY.\n");
+
+ rc = usbat_flash_check_media(us, info);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ return usbat_check_status(us);
+ }
+
+ if (srb->cmnd[0] == REQUEST_SENSE) {
+ US_DEBUGP("usbat_flash_transport: REQUEST_SENSE.\n");
+
+ memset(ptr, 0, 18);
+ ptr[0] = 0xF0;
+ ptr[2] = info->sense_key;
+ ptr[7] = 11;
+ ptr[12] = info->sense_asc;
+ ptr[13] = info->sense_ascq;
+ usb_stor_set_xfer_buf(ptr, 18, srb);
+
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
+ // sure. whatever. not like we can stop the user from popping
+ // the media out of the device (no locking doors, etc)
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ US_DEBUGP("usbat_flash_transport: Gah! Unknown command: %d (0x%x)\n",
+ srb->cmnd[0], srb->cmnd[0]);
+ info->sense_key = 0x05;
+ info->sense_asc = 0x20;
+ info->sense_ascq = 0x00;
+ return USB_STOR_TRANSPORT_FAILED;
+}
+
+/*
+ * Default transport function. Attempts to detect which transport function
+ * should be called, makes it the new default, and calls it.
+ *
+ * This function should never be called. Our usbat_init() function detects the
+ * device type and changes the us->transport ptr to the transport function
+ * relevant to the device.
+ * However, we'll support this impossible(?) case anyway.
+ */
+int usbat_transport(struct scsi_cmnd *srb, struct us_data *us)
+{
+ struct usbat_info *info = (struct usbat_info*) (us->extra);
+
+ if (usbat_set_transport(us, info))
+ return USB_STOR_TRANSPORT_ERROR;
+
+ return us->transport(srb, us);
+}
+