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usb_storage.c

/*
 * Most of this source has been derived from the Linux USB
 * project:
 *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
 *   (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org)
 *   (c) 1999 Michael Gee (michael@linuxspecific.com)
 *   (c) 2000 Yggdrasil Computing, Inc.
 *
 *
 * Adapted for U-Boot:
 *   (C) Copyright 2001 Denis Peter, MPL AG Switzerland
 *
 * For BBB support (C) Copyright 2003
 * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
 *
 * BBB support based on /sys/dev/usb/umass.c from
 * FreeBSD.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 of
 * the License, 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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */

/* Note:
 * Currently only the CBI transport protocoll has been implemented, and it
 * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
 * transport protocoll may work as well.
 */
/*
 * New Note:
 * Support for USB Mass Storage Devices (BBB) has been added. It has
 * only been tested with USB memory sticks.
 */


#include <common.h>
#include <command.h>
#include <asm/byteorder.h>
#include <asm/processor.h>

#include <part.h>
#include <usb.h>

#undef USB_STOR_DEBUG
#undef BBB_COMDAT_TRACE
#undef BBB_XPORT_TRACE

#ifdef      USB_STOR_DEBUG
#define USB_STOR_PRINTF(fmt, args...)     printf(fmt , ##args)
#else
#define USB_STOR_PRINTF(fmt, args...)
#endif

#include <scsi.h>
/* direction table -- this indicates the direction of the data
 * transfer for each command code -- a 1 indicates input
 */
unsigned char us_direction[256/8] = {
      0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
      0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
#define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)

static unsigned char usb_stor_buf[512];
static ccb usb_ccb;

/*
 * CBI style
 */

#define US_CBI_ADSC           0

/*
 * BULK only
 */
#define US_BBB_RESET          0xff
#define US_BBB_GET_MAX_LUN    0xfe

/* Command Block Wrapper */
typedef struct {
      __u32       dCBWSignature;
#     define CBWSIGNATURE     0x43425355
      __u32       dCBWTag;
      __u32       dCBWDataTransferLength;
      __u8        bCBWFlags;
#     define CBWFLAGS_OUT     0x00
#     define CBWFLAGS_IN      0x80
      __u8        bCBWLUN;
      __u8        bCDBLength;
#     define CBWCDBLENGTH     16
      __u8        CBWCDB[CBWCDBLENGTH];
} umass_bbb_cbw_t;
#define UMASS_BBB_CBW_SIZE    31
static __u32 CBWTag;

/* Command Status Wrapper */
typedef struct {
      __u32       dCSWSignature;
#     define CSWSIGNATURE     0x53425355
      __u32       dCSWTag;
      __u32       dCSWDataResidue;
      __u8        bCSWStatus;
#     define CSWSTATUS_GOOD   0x0
#     define CSWSTATUS_FAILED 0x1
#     define CSWSTATUS_PHASE  0x2
} umass_bbb_csw_t;
#define UMASS_BBB_CSW_SIZE    13

#define USB_MAX_STOR_DEV 5
static int usb_max_devs; /* number of highest available usb device */

static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV];

struct us_data;
typedef int (*trans_cmnd)(ccb *cb, struct us_data *data);
typedef int (*trans_reset)(struct us_data *data);

struct us_data {
      struct usb_device *pusb_dev;   /* this usb_device */

      unsigned int      flags;                  /* from filter initially */
      unsigned char     ifnum;                  /* interface number */
      unsigned char     ep_in;                  /* in endpoint */
      unsigned char     ep_out;                 /* out ....... */
      unsigned char     ep_int;                 /* interrupt . */
      unsigned char     subclass;         /* as in overview */
      unsigned char     protocol;         /* .............. */
      unsigned char     attention_done;         /* force attn on first cmd */
      unsigned short    ip_data;          /* interrupt data */
      int         action;                 /* what to do */
      int         ip_wanted;        /* needed */
      int         *irq_handle;            /* for USB int requests */
      unsigned int      irqpipe;          /* pipe for release_irq */
      unsigned char     irqmaxp;          /* max packed for irq Pipe */
      unsigned char     irqinterval;            /* Intervall for IRQ Pipe */
      ccb         *srb;             /* current srb */
      trans_reset transport_reset;  /* reset routine */
      trans_cmnd  transport;        /* transport routine */
};

static struct us_data usb_stor[USB_MAX_STOR_DEV];


#define USB_STOR_TRANSPORT_GOOD        0
#define USB_STOR_TRANSPORT_FAILED -1
#define USB_STOR_TRANSPORT_ERROR  -2

int usb_stor_get_info(struct usb_device *dev, struct us_data *us,
                  block_dev_desc_t *dev_desc);
int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
                  struct us_data *ss);
unsigned long usb_stor_read(int device, unsigned long blknr,
                      unsigned long blkcnt, void *buffer);
unsigned long usb_stor_write(int device, unsigned long blknr,
                       unsigned long blkcnt, const void *buffer);
struct usb_device * usb_get_dev_index(int index);
void uhci_show_temp_int_td(void);

block_dev_desc_t *usb_stor_get_dev(int index)
{
      return (index < usb_max_devs) ? &usb_dev_desc[index] : NULL;
}


void usb_show_progress(void)
{
      debug(".");
}

/*******************************************************************************
 * show info on storage devices; 'usb start/init' must be invoked earlier
 * as we only retrieve structures populated during devices initialization
 */
int usb_stor_info(void)
{
      int i;

      if (usb_max_devs > 0) {
            for (i = 0; i < usb_max_devs; i++) {
                  printf("  Device %d: ", i);
                  dev_print(&usb_dev_desc[i]);
            }
            return 0;
      }

      printf("No storage devices, perhaps not 'usb start'ed..?\n");
      return 1;
}

/*******************************************************************************
 * scan the usb and reports device info
 * to the user if mode = 1
 * returns current device or -1 if no
 */
int usb_stor_scan(int mode)
{
      unsigned char i;
      struct usb_device *dev;

      /* GJ */
      memset(usb_stor_buf, 0, sizeof(usb_stor_buf));

      if (mode == 1)
            printf("       scanning bus for storage devices... ");

      usb_disable_asynch(1); /* asynch transfer not allowed */

      for (i = 0; i < USB_MAX_STOR_DEV; i++) {
            memset(&usb_dev_desc[i], 0, sizeof(block_dev_desc_t));
            usb_dev_desc[i].if_type = IF_TYPE_USB;
            usb_dev_desc[i].dev = i;
            usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
            usb_dev_desc[i].target = 0xff;
            usb_dev_desc[i].type = DEV_TYPE_UNKNOWN;
            usb_dev_desc[i].block_read = usb_stor_read;
            usb_dev_desc[i].block_write = usb_stor_write;
      }

      usb_max_devs = 0;
      for (i = 0; i < USB_MAX_DEVICE; i++) {
            dev = usb_get_dev_index(i); /* get device */
            USB_STOR_PRINTF("i=%d\n", i);
            if (dev == NULL)
                  break; /* no more devices avaiable */

            if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
                  /* ok, it is a storage devices
                   * get info and fill it in
                   */
                  if (usb_stor_get_info(dev, &usb_stor[usb_max_devs],
                                    &usb_dev_desc[usb_max_devs]) == 1)
                        usb_max_devs++;
            }
            /* if storage device */
            if (usb_max_devs == USB_MAX_STOR_DEV) {
                  printf("max USB Storage Device reached: %d stopping\n",
                        usb_max_devs);
                  break;
            }
      } /* for */

      usb_disable_asynch(0); /* asynch transfer allowed */
      printf("%d Storage Device(s) found\n", usb_max_devs);
      if (usb_max_devs > 0)
            return 0;
      return -1;
}

static int usb_stor_irq(struct usb_device *dev)
{
      struct us_data *us;
      us = (struct us_data *)dev->privptr;

      if (us->ip_wanted)
            us->ip_wanted = 0;
      return 0;
}


#ifdef      USB_STOR_DEBUG

static void usb_show_srb(ccb *pccb)
{
      int i;
      printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
      for (i = 0; i < 12; i++)
            printf("%02X ", pccb->cmd[i]);
      printf("\n");
}

static void display_int_status(unsigned long tmp)
{
      printf("Status: %s %s %s %s %s %s %s\n",
            (tmp & USB_ST_ACTIVE) ? "Active" : "",
            (tmp & USB_ST_STALLED) ? "Stalled" : "",
            (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
            (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
            (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
            (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
            (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
}
#endif
/***********************************************************************
 * Data transfer routines
 ***********************************************************************/

static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
{
      int max_size;
      int this_xfer;
      int result;
      int partial;
      int maxtry;
      int stat;

      /* determine the maximum packet size for these transfers */
      max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;

      /* while we have data left to transfer */
      while (length) {

            /* calculate how long this will be -- maximum or a remainder */
            this_xfer = length > max_size ? max_size : length;
            length -= this_xfer;

            /* setup the retry counter */
            maxtry = 10;

            /* set up the transfer loop */
            do {
                  /* transfer the data */
                  USB_STOR_PRINTF("Bulk xfer 0x%x(%d) try #%d\n",
                          (unsigned int)buf, this_xfer, 11 - maxtry);
                  result = usb_bulk_msg(us->pusb_dev, pipe, buf,
                                    this_xfer, &partial,
                                    USB_CNTL_TIMEOUT * 5);
                  USB_STOR_PRINTF("bulk_msg returned %d xferred %d/%d\n",
                          result, partial, this_xfer);
                  if (us->pusb_dev->status != 0) {
                        /* if we stall, we need to clear it before
                         * we go on
                         */
#ifdef USB_STOR_DEBUG
                        display_int_status(us->pusb_dev->status);
#endif
                        if (us->pusb_dev->status & USB_ST_STALLED) {
                              USB_STOR_PRINTF("stalled ->clearing endpoint halt for pipe 0x%x\n", pipe);
                              stat = us->pusb_dev->status;
                              usb_clear_halt(us->pusb_dev, pipe);
                              us->pusb_dev->status = stat;
                              if (this_xfer == partial) {
                                    USB_STOR_PRINTF("bulk transferred with error %X, but data ok\n", us->pusb_dev->status);
                                    return 0;
                              }
                              else
                                    return result;
                        }
                        if (us->pusb_dev->status & USB_ST_NAK_REC) {
                              USB_STOR_PRINTF("Device NAKed bulk_msg\n");
                              return result;
                        }
                        USB_STOR_PRINTF("bulk transferred with error");
                        if (this_xfer == partial) {
                              USB_STOR_PRINTF(" %d, but data ok\n",
                                          us->pusb_dev->status);
                              return 0;
                        }
                        /* if our try counter reaches 0, bail out */
                              USB_STOR_PRINTF(" %d, data %d\n",
                                    us->pusb_dev->status, partial);
                        if (!maxtry--)
                                    return result;
                  }
                  /* update to show what data was transferred */
                  this_xfer -= partial;
                  buf += partial;
                  /* continue until this transfer is done */
            } while (this_xfer);
      }

      /* if we get here, we're done and successful */
      return 0;
}

static int usb_stor_BBB_reset(struct us_data *us)
{
      int result;
      unsigned int pipe;

      /*
       * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
       *
       * For Reset Recovery the host shall issue in the following order:
       * a) a Bulk-Only Mass Storage Reset
       * b) a Clear Feature HALT to the Bulk-In endpoint
       * c) a Clear Feature HALT to the Bulk-Out endpoint
       *
       * This is done in 3 steps.
       *
       * If the reset doesn't succeed, the device should be port reset.
       *
       * This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
       */
      USB_STOR_PRINTF("BBB_reset\n");
      result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
                         US_BBB_RESET,
                         USB_TYPE_CLASS | USB_RECIP_INTERFACE,
                         0, us->ifnum, 0, 0, USB_CNTL_TIMEOUT * 5);

      if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
            USB_STOR_PRINTF("RESET:stall\n");
            return -1;
      }

      /* long wait for reset */
      wait_ms(150);
      USB_STOR_PRINTF("BBB_reset result %d: status %X reset\n", result,
                  us->pusb_dev->status);
      pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
      result = usb_clear_halt(us->pusb_dev, pipe);
      /* long wait for reset */
      wait_ms(150);
      USB_STOR_PRINTF("BBB_reset result %d: status %X clearing IN endpoint\n",
                  result, us->pusb_dev->status);
      /* long wait for reset */
      pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
      result = usb_clear_halt(us->pusb_dev, pipe);
      wait_ms(150);
      USB_STOR_PRINTF("BBB_reset result %d: status %X"
                  " clearing OUT endpoint\n", result,
                  us->pusb_dev->status);
      USB_STOR_PRINTF("BBB_reset done\n");
      return 0;
}

/* FIXME: this reset function doesn't really reset the port, and it
 * should. Actually it should probably do what it's doing here, and
 * reset the port physically
 */
static int usb_stor_CB_reset(struct us_data *us)
{
      unsigned char cmd[12];
      int result;

      USB_STOR_PRINTF("CB_reset\n");
      memset(cmd, 0xff, sizeof(cmd));
      cmd[0] = SCSI_SEND_DIAG;
      cmd[1] = 4;
      result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
                         US_CBI_ADSC,
                         USB_TYPE_CLASS | USB_RECIP_INTERFACE,
                         0, us->ifnum, cmd, sizeof(cmd),
                         USB_CNTL_TIMEOUT * 5);

      /* long wait for reset */
      wait_ms(1500);
      USB_STOR_PRINTF("CB_reset result %d: status %X"
                  " clearing endpoint halt\n", result,
                  us->pusb_dev->status);
      usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
      usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));

      USB_STOR_PRINTF("CB_reset done\n");
      return 0;
}

/*
 * Set up the command for a BBB device. Note that the actual SCSI
 * command is copied into cbw.CBWCDB.
 */
int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
{
      int result;
      int actlen;
      int dir_in;
      unsigned int pipe;
      umass_bbb_cbw_t cbw;

      dir_in = US_DIRECTION(srb->cmd[0]);

#ifdef BBB_COMDAT_TRACE
      printf("dir %d lun %d cmdlen %d cmd %p datalen %d pdata %p\n",
            dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
            srb->pdata);
      if (srb->cmdlen) {
            for (result = 0; result < srb->cmdlen; result++)
                  printf("cmd[%d] %#x ", result, srb->cmd[result]);
            printf("\n");
      }
#endif
      /* sanity checks */
      if (!(srb->cmdlen <= CBWCDBLENGTH)) {
            USB_STOR_PRINTF("usb_stor_BBB_comdat:cmdlen too large\n");
            return -1;
      }

      /* always OUT to the ep */
      pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);

      cbw.dCBWSignature = cpu_to_le32(CBWSIGNATURE);
      cbw.dCBWTag = cpu_to_le32(CBWTag++);
      cbw.dCBWDataTransferLength = cpu_to_le32(srb->datalen);
      cbw.bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
      cbw.bCBWLUN = srb->lun;
      cbw.bCDBLength = srb->cmdlen;
      /* copy the command data into the CBW command data buffer */
      /* DST SRC LEN!!! */
      memcpy(cbw.CBWCDB, srb->cmd, srb->cmdlen);
      result = usb_bulk_msg(us->pusb_dev, pipe, &cbw, UMASS_BBB_CBW_SIZE,
                        &actlen, USB_CNTL_TIMEOUT * 5);
      if (result < 0)
            USB_STOR_PRINTF("usb_stor_BBB_comdat:usb_bulk_msg error\n");
      return result;
}

/* FIXME: we also need a CBI_command which sets up the completion
 * interrupt, and waits for it
 */
int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
{
      int result = 0;
      int dir_in, retry;
      unsigned int pipe;
      unsigned long status;

      retry = 5;
      dir_in = US_DIRECTION(srb->cmd[0]);

      if (dir_in)
            pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
      else
            pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);

      while (retry--) {
            USB_STOR_PRINTF("CBI gets a command: Try %d\n", 5 - retry);
#ifdef USB_STOR_DEBUG
            usb_show_srb(srb);
#endif
            /* let's send the command via the control pipe */
            result = usb_control_msg(us->pusb_dev,
                               usb_sndctrlpipe(us->pusb_dev , 0),
                               US_CBI_ADSC,
                               USB_TYPE_CLASS | USB_RECIP_INTERFACE,
                               0, us->ifnum,
                               srb->cmd, srb->cmdlen,
                               USB_CNTL_TIMEOUT * 5);
            USB_STOR_PRINTF("CB_transport: control msg returned %d,"
                        " status %X\n", result, us->pusb_dev->status);
            /* check the return code for the command */
            if (result < 0) {
                  if (us->pusb_dev->status & USB_ST_STALLED) {
                        status = us->pusb_dev->status;
                        USB_STOR_PRINTF(" stall during command found,"
                                    " clear pipe\n");
                        usb_clear_halt(us->pusb_dev,
                                    usb_sndctrlpipe(us->pusb_dev, 0));
                        us->pusb_dev->status = status;
                  }
                  USB_STOR_PRINTF(" error during command %02X"
                              " Stat = %X\n", srb->cmd[0],
                              us->pusb_dev->status);
                  return result;
            }
            /* transfer the data payload for this command, if one exists*/

            USB_STOR_PRINTF("CB_transport: control msg returned %d,"
                        " direction is %s to go 0x%lx\n", result,
                        dir_in ? "IN" : "OUT", srb->datalen);
            if (srb->datalen) {
                  result = us_one_transfer(us, pipe, (char *)srb->pdata,
                                     srb->datalen);
                  USB_STOR_PRINTF("CBI attempted to transfer data,"
                              " result is %d status %lX, len %d\n",
                              result, us->pusb_dev->status,
                              us->pusb_dev->act_len);
                  if (!(us->pusb_dev->status & USB_ST_NAK_REC))
                        break;
            } /* if (srb->datalen) */
            else
                  break;
      }
      /* return result */

      return result;
}


int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
{
      int timeout;

      us->ip_wanted = 1;
      submit_int_msg(us->pusb_dev, us->irqpipe,
                  (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
      timeout = 1000;
      while (timeout--) {
            if ((volatile int *) us->ip_wanted == 0)
                  break;
            wait_ms(10);
      }
      if (us->ip_wanted) {
            printf("    Did not get interrupt on CBI\n");
            us->ip_wanted = 0;
            return USB_STOR_TRANSPORT_ERROR;
      }
      USB_STOR_PRINTF
            ("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
             us->ip_data, us->pusb_dev->irq_act_len,
             us->pusb_dev->irq_status);
      /* UFI gives us ASC and ASCQ, like a request sense */
      if (us->subclass == US_SC_UFI) {
            if (srb->cmd[0] == SCSI_REQ_SENSE ||
                srb->cmd[0] == SCSI_INQUIRY)
                  return USB_STOR_TRANSPORT_GOOD; /* Good */
            else if (us->ip_data)
                  return USB_STOR_TRANSPORT_FAILED;
            else
                  return USB_STOR_TRANSPORT_GOOD;
      }
      /* otherwise, we interpret the data normally */
      switch (us->ip_data) {
      case 0x0001:
            return USB_STOR_TRANSPORT_GOOD;
      case 0x0002:
            return USB_STOR_TRANSPORT_FAILED;
      default:
            return USB_STOR_TRANSPORT_ERROR;
      }                 /* switch */
      return USB_STOR_TRANSPORT_ERROR;
}

#define USB_TRANSPORT_UNKNOWN_RETRY 5
#define USB_TRANSPORT_NOT_READY_RETRY 10

/* clear a stall on an endpoint - special for BBB devices */
int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
{
      int result;

      /* ENDPOINT_HALT = 0, so set value to 0 */
      result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
                        USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
                        0, endpt, 0, 0, USB_CNTL_TIMEOUT * 5);
      return result;
}

int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
{
      int result, retry;
      int dir_in;
      int actlen, data_actlen;
      unsigned int pipe, pipein, pipeout;
      umass_bbb_csw_t csw;
#ifdef BBB_XPORT_TRACE
      unsigned char *ptr;
      int index;
#endif

      dir_in = US_DIRECTION(srb->cmd[0]);

      /* COMMAND phase */
      USB_STOR_PRINTF("COMMAND phase\n");
      result = usb_stor_BBB_comdat(srb, us);
      if (result < 0) {
            USB_STOR_PRINTF("failed to send CBW status %ld\n",
                  us->pusb_dev->status);
            usb_stor_BBB_reset(us);
            return USB_STOR_TRANSPORT_FAILED;
      }
      wait_ms(5);
      pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
      pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
      /* DATA phase + error handling */
      data_actlen = 0;
      /* no data, go immediately to the STATUS phase */
      if (srb->datalen == 0)
            goto st;
      USB_STOR_PRINTF("DATA phase\n");
      if (dir_in)
            pipe = pipein;
      else
            pipe = pipeout;
      result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
                        &data_actlen, USB_CNTL_TIMEOUT * 5);
      /* special handling of STALL in DATA phase */
      if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
            USB_STOR_PRINTF("DATA:stall\n");
            /* clear the STALL on the endpoint */
            result = usb_stor_BBB_clear_endpt_stall(us,
                              dir_in ? us->ep_in : us->ep_out);
            if (result >= 0)
                  /* continue on to STATUS phase */
                  goto st;
      }
      if (result < 0) {
            USB_STOR_PRINTF("usb_bulk_msg error status %ld\n",
                  us->pusb_dev->status);
            usb_stor_BBB_reset(us);
            return USB_STOR_TRANSPORT_FAILED;
      }
#ifdef BBB_XPORT_TRACE
      for (index = 0; index < data_actlen; index++)
            printf("pdata[%d] %#x ", index, srb->pdata[index]);
      printf("\n");
#endif
      /* STATUS phase + error handling */
st:
      retry = 0;
again:
      USB_STOR_PRINTF("STATUS phase\n");
      result = usb_bulk_msg(us->pusb_dev, pipein, &csw, UMASS_BBB_CSW_SIZE,
                        &actlen, USB_CNTL_TIMEOUT*5);

      /* special handling of STALL in STATUS phase */
      if ((result < 0) && (retry < 1) &&
          (us->pusb_dev->status & USB_ST_STALLED)) {
            USB_STOR_PRINTF("STATUS:stall\n");
            /* clear the STALL on the endpoint */
            result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
            if (result >= 0 && (retry++ < 1))
                  /* do a retry */
                  goto again;
      }
      if (result < 0) {
            USB_STOR_PRINTF("usb_bulk_msg error status %ld\n",
                  us->pusb_dev->status);
            usb_stor_BBB_reset(us);
            return USB_STOR_TRANSPORT_FAILED;
      }
#ifdef BBB_XPORT_TRACE
      ptr = (unsigned char *)&csw;
      for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
            printf("ptr[%d] %#x ", index, ptr[index]);
      printf("\n");
#endif
      /* misuse pipe to get the residue */
      pipe = le32_to_cpu(csw.dCSWDataResidue);
      if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
            pipe = srb->datalen - data_actlen;
      if (CSWSIGNATURE != le32_to_cpu(csw.dCSWSignature)) {
            USB_STOR_PRINTF("!CSWSIGNATURE\n");
            usb_stor_BBB_reset(us);
            return USB_STOR_TRANSPORT_FAILED;
      } else if ((CBWTag - 1) != le32_to_cpu(csw.dCSWTag)) {
            USB_STOR_PRINTF("!Tag\n");
            usb_stor_BBB_reset(us);
            return USB_STOR_TRANSPORT_FAILED;
      } else if (csw.bCSWStatus > CSWSTATUS_PHASE) {
            USB_STOR_PRINTF(">PHASE\n");
            usb_stor_BBB_reset(us);
            return USB_STOR_TRANSPORT_FAILED;
      } else if (csw.bCSWStatus == CSWSTATUS_PHASE) {
            USB_STOR_PRINTF("=PHASE\n");
            usb_stor_BBB_reset(us);
            return USB_STOR_TRANSPORT_FAILED;
      } else if (data_actlen > srb->datalen) {
            USB_STOR_PRINTF("transferred %dB instead of %dB\n",
                  data_actlen, srb->datalen);
            return USB_STOR_TRANSPORT_FAILED;
      } else if (csw.bCSWStatus == CSWSTATUS_FAILED) {
            USB_STOR_PRINTF("FAILED\n");
            return USB_STOR_TRANSPORT_FAILED;
      }

      return result;
}

int usb_stor_CB_transport(ccb *srb, struct us_data *us)
{
      int result, status;
      ccb *psrb;
      ccb reqsrb;
      int retry, notready;

      psrb = &reqsrb;
      status = USB_STOR_TRANSPORT_GOOD;
      retry = 0;
      notready = 0;
      /* issue the command */
do_retry:
      result = usb_stor_CB_comdat(srb, us);
      USB_STOR_PRINTF("command / Data returned %d, status %X\n",
                  result, us->pusb_dev->status);
      /* if this is an CBI Protocol, get IRQ */
      if (us->protocol == US_PR_CBI) {
            status = usb_stor_CBI_get_status(srb, us);
            /* if the status is error, report it */
            if (status == USB_STOR_TRANSPORT_ERROR) {
                  USB_STOR_PRINTF(" USB CBI Command Error\n");
                  return status;
            }
            srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
            srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
            if (!us->ip_data) {
                  /* if the status is good, report it */
                  if (status == USB_STOR_TRANSPORT_GOOD) {
                        USB_STOR_PRINTF(" USB CBI Command Good\n");
                        return status;
                  }
            }
      }
      /* do we have to issue an auto request? */
      /* HERE we have to check the result */
      if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
            USB_STOR_PRINTF("ERROR %X\n", us->pusb_dev->status);
            us->transport_reset(us);
            return USB_STOR_TRANSPORT_ERROR;
      }
      if ((us->protocol == US_PR_CBI) &&
          ((srb->cmd[0] == SCSI_REQ_SENSE) ||
          (srb->cmd[0] == SCSI_INQUIRY))) {
            /* do not issue an autorequest after request sense */
            USB_STOR_PRINTF("No auto request and good\n");
            return USB_STOR_TRANSPORT_GOOD;
      }
      /* issue an request_sense */
      memset(&psrb->cmd[0], 0, 12);
      psrb->cmd[0] = SCSI_REQ_SENSE;
      psrb->cmd[1] = srb->lun << 5;
      psrb->cmd[4] = 18;
      psrb->datalen = 18;
      psrb->pdata = &srb->sense_buf[0];
      psrb->cmdlen = 12;
      /* issue the command */
      result = usb_stor_CB_comdat(psrb, us);
      USB_STOR_PRINTF("auto request returned %d\n", result);
      /* if this is an CBI Protocol, get IRQ */
      if (us->protocol == US_PR_CBI)
            status = usb_stor_CBI_get_status(psrb, us);

      if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
            USB_STOR_PRINTF(" AUTO REQUEST ERROR %d\n",
                        us->pusb_dev->status);
            return USB_STOR_TRANSPORT_ERROR;
      }
      USB_STOR_PRINTF("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
                  srb->sense_buf[0], srb->sense_buf[2],
                  srb->sense_buf[12], srb->sense_buf[13]);
      /* Check the auto request result */
      if ((srb->sense_buf[2] == 0) &&
          (srb->sense_buf[12] == 0) &&
          (srb->sense_buf[13] == 0)) {
            /* ok, no sense */
            return USB_STOR_TRANSPORT_GOOD;
      }

      /* Check the auto request result */
      switch (srb->sense_buf[2]) {
      case 0x01:
            /* Recovered Error */
            return USB_STOR_TRANSPORT_GOOD;
            break;
      case 0x02:
            /* Not Ready */
            if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
                  printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
                         " 0x%02X (NOT READY)\n", srb->cmd[0],
                        srb->sense_buf[0], srb->sense_buf[2],
                        srb->sense_buf[12], srb->sense_buf[13]);
                  return USB_STOR_TRANSPORT_FAILED;
            } else {
                  wait_ms(100);
                  goto do_retry;
            }
            break;
      default:
            if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
                  printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
                         " 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
                        srb->sense_buf[2], srb->sense_buf[12],
                        srb->sense_buf[13]);
                  return USB_STOR_TRANSPORT_FAILED;
            } else
                  goto do_retry;
            break;
      }
      return USB_STOR_TRANSPORT_FAILED;
}


static int usb_inquiry(ccb *srb, struct us_data *ss)
{
      int retry, i;
      retry = 5;
      do {
            memset(&srb->cmd[0], 0, 12);
            srb->cmd[0] = SCSI_INQUIRY;
            srb->cmd[4] = 36;
            srb->datalen = 36;
            srb->cmdlen = 12;
            i = ss->transport(srb, ss);
            USB_STOR_PRINTF("inquiry returns %d\n", i);
            if (i == 0)
                  break;
      } while (--retry);

      if (!retry) {
            printf("error in inquiry\n");
            return -1;
      }
      return 0;
}

static int usb_request_sense(ccb *srb, struct us_data *ss)
{
      char *ptr;

      ptr = (char *)srb->pdata;
      memset(&srb->cmd[0], 0, 12);
      srb->cmd[0] = SCSI_REQ_SENSE;
      srb->cmd[4] = 18;
      srb->datalen = 18;
      srb->pdata = &srb->sense_buf[0];
      srb->cmdlen = 12;
      ss->transport(srb, ss);
      USB_STOR_PRINTF("Request Sense returned %02X %02X %02X\n",
                  srb->sense_buf[2], srb->sense_buf[12],
                  srb->sense_buf[13]);
      srb->pdata = (uchar *)ptr;
      return 0;
}

static int usb_test_unit_ready(ccb *srb, struct us_data *ss)
{
      int retries = 10;

      do {
            memset(&srb->cmd[0], 0, 12);
            srb->cmd[0] = SCSI_TST_U_RDY;
            srb->datalen = 0;
            srb->cmdlen = 12;
            if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
                  return 0;
            usb_request_sense(srb, ss);
            wait_ms(100);
      } while (retries--);

      return -1;
}

static int usb_read_capacity(ccb *srb, struct us_data *ss)
{
      int retry;
      /* XXX retries */
      retry = 3;
      do {
            memset(&srb->cmd[0], 0, 12);
            srb->cmd[0] = SCSI_RD_CAPAC;
            srb->datalen = 8;
            srb->cmdlen = 12;
            if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
                  return 0;
      } while (retry--);

      return -1;
}

static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start,
                   unsigned short blocks)
{
      memset(&srb->cmd[0], 0, 12);
      srb->cmd[0] = SCSI_READ10;
      srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
      srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
      srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
      srb->cmd[5] = ((unsigned char) (start)) & 0xff;
      srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
      srb->cmd[8] = (unsigned char) blocks & 0xff;
      srb->cmdlen = 12;
      USB_STOR_PRINTF("read10: start %lx blocks %x\n", start, blocks);
      return ss->transport(srb, ss);
}

static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start,
                  unsigned short blocks)
{
      memset(&srb->cmd[0], 0, 12);
      srb->cmd[0] = SCSI_WRITE10;
      srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
      srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
      srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
      srb->cmd[5] = ((unsigned char) (start)) & 0xff;
      srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
      srb->cmd[8] = (unsigned char) blocks & 0xff;
      srb->cmdlen = 12;
      USB_STOR_PRINTF("write10: start %lx blocks %x\n", start, blocks);
      return ss->transport(srb, ss);
}


#ifdef CONFIG_USB_BIN_FIXUP
/*
 * Some USB storage devices queried for SCSI identification data respond with
 * binary strings, which if output to the console freeze the terminal. The
 * workaround is to modify the vendor and product strings read from such
 * device with proper values (as reported by 'usb info').
 *
 * Vendor and product length limits are taken from the definition of
 * block_dev_desc_t in include/part.h.
 */
static void usb_bin_fixup(struct usb_device_descriptor descriptor,
                        unsigned char vendor[],
                        unsigned char product[]) {
      const unsigned char max_vendor_len = 40;
      const unsigned char max_product_len = 20;
      if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
            strncpy((char *)vendor, "SMSC", max_vendor_len);
            strncpy((char *)product, "Flash Media Cntrller",
                  max_product_len);
      }
}
#endif /* CONFIG_USB_BIN_FIXUP */

#define USB_MAX_READ_BLK 20

unsigned long usb_stor_read(int device, unsigned long blknr,
                      unsigned long blkcnt, void *buffer)
{
      unsigned long start, blks, buf_addr;
      unsigned short smallblks;
      struct usb_device *dev;
      int retry, i;
      ccb *srb = &usb_ccb;

      if (blkcnt == 0)
            return 0;

      device &= 0xff;
      /* Setup  device */
      USB_STOR_PRINTF("\nusb_read: dev %d \n", device);
      dev = NULL;
      for (i = 0; i < USB_MAX_DEVICE; i++) {
            dev = usb_get_dev_index(i);
            if (dev == NULL)
                  return 0;
            if (dev->devnum == usb_dev_desc[device].target)
                  break;
      }

      usb_disable_asynch(1); /* asynch transfer not allowed */
      srb->lun = usb_dev_desc[device].lun;
      buf_addr = (unsigned long)buffer;
      start = blknr;
      blks = blkcnt;
      if (usb_test_unit_ready(srb, (struct us_data *)dev->privptr)) {
            printf("Device NOT ready\n   Request Sense returned %02X %02X"
                   " %02X\n", srb->sense_buf[2], srb->sense_buf[12],
                   srb->sense_buf[13]);
            return 0;
      }

      USB_STOR_PRINTF("\nusb_read: dev %d startblk %lx, blccnt %lx"
                  " buffer %lx\n", device, start, blks, buf_addr);

      do {
            /* XXX need some comment here */
            retry = 2;
            srb->pdata = (unsigned char *)buf_addr;
            if (blks > USB_MAX_READ_BLK)
                  smallblks = USB_MAX_READ_BLK;
            else
                  smallblks = (unsigned short) blks;
retry_it:
            if (smallblks == USB_MAX_READ_BLK)
                  usb_show_progress();
            srb->datalen = usb_dev_desc[device].blksz * smallblks;
            srb->pdata = (unsigned char *)buf_addr;
            if (usb_read_10(srb, (struct us_data *)dev->privptr, start,
                smallblks)) {
                  USB_STOR_PRINTF("Read ERROR\n");
                  usb_request_sense(srb, (struct us_data *)dev->privptr);
                  if (retry--)
                        goto retry_it;
                  blkcnt -= blks;
                  break;
            }
            start += smallblks;
            blks -= smallblks;
            buf_addr += srb->datalen;
      } while (blks != 0);

      USB_STOR_PRINTF("usb_read: end startblk %lx, blccnt %x buffer %lx\n",
                  start, smallblks, buf_addr);

      usb_disable_asynch(0); /* asynch transfer allowed */
      if (blkcnt >= USB_MAX_READ_BLK)
            debug("\n");
      return blkcnt;
}

#define USB_MAX_WRITE_BLK 20

unsigned long usb_stor_write(int device, unsigned long blknr,
                        unsigned long blkcnt, const void *buffer)
{
      unsigned long start, blks, buf_addr;
      unsigned short smallblks;
      struct usb_device *dev;
      int retry, i;
      ccb *srb = &usb_ccb;

      if (blkcnt == 0)
            return 0;

      device &= 0xff;
      /* Setup  device */
      USB_STOR_PRINTF("\nusb_write: dev %d \n", device);
      dev = NULL;
      for (i = 0; i < USB_MAX_DEVICE; i++) {
            dev = usb_get_dev_index(i);
            if (dev == NULL)
                  return 0;
            if (dev->devnum == usb_dev_desc[device].target)
                  break;
      }

      usb_disable_asynch(1); /* asynch transfer not allowed */

      srb->lun = usb_dev_desc[device].lun;
      buf_addr = (unsigned long)buffer;
      start = blknr;
      blks = blkcnt;
      if (usb_test_unit_ready(srb, (struct us_data *)dev->privptr)) {
            printf("Device NOT ready\n   Request Sense returned %02X %02X"
                   " %02X\n", srb->sense_buf[2], srb->sense_buf[12],
                  srb->sense_buf[13]);
            return 0;
      }

      USB_STOR_PRINTF("\nusb_write: dev %d startblk %lx, blccnt %lx"
                  " buffer %lx\n", device, start, blks, buf_addr);

      do {
            /* If write fails retry for max retry count else
             * return with number of blocks written successfully.
             */
            retry = 2;
            srb->pdata = (unsigned char *)buf_addr;
            if (blks > USB_MAX_WRITE_BLK)
                  smallblks = USB_MAX_WRITE_BLK;
            else
                  smallblks = (unsigned short) blks;
retry_it:
            if (smallblks == USB_MAX_WRITE_BLK)
                  usb_show_progress();
            srb->datalen = usb_dev_desc[device].blksz * smallblks;
            srb->pdata = (unsigned char *)buf_addr;
            if (usb_write_10(srb, (struct us_data *)dev->privptr, start,
                smallblks)) {
                  USB_STOR_PRINTF("Write ERROR\n");
                  usb_request_sense(srb, (struct us_data *)dev->privptr);
                  if (retry--)
                        goto retry_it;
                  blkcnt -= blks;
                  break;
            }
            start += smallblks;
            blks -= smallblks;
            buf_addr += srb->datalen;
      } while (blks != 0);

      USB_STOR_PRINTF("usb_write: end startblk %lx, blccnt %x buffer %lx\n",
                  start, smallblks, buf_addr);

      usb_disable_asynch(0); /* asynch transfer allowed */
      if (blkcnt >= USB_MAX_WRITE_BLK)
            debug("\n");
      return blkcnt;

}

/* Probe to see if a new device is actually a Storage device */
int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
                  struct us_data *ss)
{
      struct usb_interface *iface;
      int i;
      unsigned int flags = 0;

      int protocol = 0;
      int subclass = 0;

      /* let's examine the device now */
      iface = &dev->config.if_desc[ifnum];

#if 0
      /* this is the place to patch some storage devices */
      USB_STOR_PRINTF("iVendor %X iProduct %X\n", dev->descriptor.idVendor,
                  dev->descriptor.idProduct);

      if ((dev->descriptor.idVendor) == 0x066b &&
          (dev->descriptor.idProduct) == 0x0103) {
            USB_STOR_PRINTF("patched for E-USB\n");
            protocol = US_PR_CB;
            subclass = US_SC_UFI;       /* an assumption */
      }
#endif

      if (dev->descriptor.bDeviceClass != 0 ||
                  iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
                  iface->desc.bInterfaceSubClass < US_SC_MIN ||
                  iface->desc.bInterfaceSubClass > US_SC_MAX) {
            /* if it's not a mass storage, we go no further */
            return 0;
      }

      memset(ss, 0, sizeof(struct us_data));

      /* At this point, we know we've got a live one */
      USB_STOR_PRINTF("\n\nUSB Mass Storage device detected\n");

      /* Initialize the us_data structure with some useful info */
      ss->flags = flags;
      ss->ifnum = ifnum;
      ss->pusb_dev = dev;
      ss->attention_done = 0;

      /* If the device has subclass and protocol, then use that.  Otherwise,
       * take data from the specific interface.
       */
      if (subclass) {
            ss->subclass = subclass;
            ss->protocol = protocol;
      } else {
            ss->subclass = iface->desc.bInterfaceSubClass;
            ss->protocol = iface->desc.bInterfaceProtocol;
      }

      /* set the handler pointers based on the protocol */
      USB_STOR_PRINTF("Transport: ");
      switch (ss->protocol) {
      case US_PR_CB:
            USB_STOR_PRINTF("Control/Bulk\n");
            ss->transport = usb_stor_CB_transport;
            ss->transport_reset = usb_stor_CB_reset;
            break;

      case US_PR_CBI:
            USB_STOR_PRINTF("Control/Bulk/Interrupt\n");
            ss->transport = usb_stor_CB_transport;
            ss->transport_reset = usb_stor_CB_reset;
            break;
      case US_PR_BULK:
            USB_STOR_PRINTF("Bulk/Bulk/Bulk\n");
            ss->transport = usb_stor_BBB_transport;
            ss->transport_reset = usb_stor_BBB_reset;
            break;
      default:
            printf("USB Storage Transport unknown / not yet implemented\n");
            return 0;
            break;
      }

      /*
       * We are expecting a minimum of 2 endpoints - in and out (bulk).
       * An optional interrupt is OK (necessary for CBI protocol).
       * We will ignore any others.
       */
      for (i = 0; i < iface->desc.bNumEndpoints; i++) {
            /* is it an BULK endpoint? */
            if ((iface->ep_desc[i].bmAttributes &
                 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
                  if (iface->ep_desc[i].bEndpointAddress & USB_DIR_IN)
                        ss->ep_in = iface->ep_desc[i].bEndpointAddress &
                              USB_ENDPOINT_NUMBER_MASK;
                  else
                        ss->ep_out =
                              iface->ep_desc[i].bEndpointAddress &
                              USB_ENDPOINT_NUMBER_MASK;
            }

            /* is it an interrupt endpoint? */
            if ((iface->ep_desc[i].bmAttributes &
                USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
                  ss->ep_int = iface->ep_desc[i].bEndpointAddress &
                        USB_ENDPOINT_NUMBER_MASK;
                  ss->irqinterval = iface->ep_desc[i].bInterval;
            }
      }
      USB_STOR_PRINTF("Endpoints In %d Out %d Int %d\n",
              ss->ep_in, ss->ep_out, ss->ep_int);

      /* Do some basic sanity checks, and bail if we find a problem */
      if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
          !ss->ep_in || !ss->ep_out ||
          (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
            USB_STOR_PRINTF("Problems with device\n");
            return 0;
      }
      /* set class specific stuff */
      /* We only handle certain protocols.  Currently, these are
       * the only ones.
       * The SFF8070 accepts the requests used in u-boot
       */
      if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
          ss->subclass != US_SC_8070) {
            printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
            return 0;
      }
      if (ss->ep_int) {
            /* we had found an interrupt endpoint, prepare irq pipe
             * set up the IRQ pipe and handler
             */
            ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
            ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
            ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
            dev->irq_handle = usb_stor_irq;
      }
      dev->privptr = (void *)ss;
      return 1;
}

int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
                  block_dev_desc_t *dev_desc)
{
      unsigned char perq, modi;
      unsigned long cap[2];
      unsigned long *capacity, *blksz;
      ccb *pccb = &usb_ccb;

      /* for some reasons a couple of devices would not survive this reset */
      if (
          /* Sony USM256E */
          (dev->descriptor.idVendor == 0x054c &&
           dev->descriptor.idProduct == 0x019e)
          ||
          /* USB007 Mini-USB2 Flash Drive */
          (dev->descriptor.idVendor == 0x066f &&
           dev->descriptor.idProduct == 0x2010)
          ||
          /* SanDisk Corporation Cruzer Micro 20044318410546613953 */
          (dev->descriptor.idVendor == 0x0781 &&
           dev->descriptor.idProduct == 0x5151)
          ||
          /*
           * SanDisk Corporation U3 Cruzer Micro 1/4GB
           * Flash Drive 000016244373FFB4
           */
          (dev->descriptor.idVendor == 0x0781 &&
           dev->descriptor.idProduct == 0x5406)
          )
            USB_STOR_PRINTF("usb_stor_get_info: skipping RESET..\n");
      else
            ss->transport_reset(ss);

      pccb->pdata = usb_stor_buf;

      dev_desc->target = dev->devnum;
      pccb->lun = dev_desc->lun;
      USB_STOR_PRINTF(" address %d\n", dev_desc->target);

      if (usb_inquiry(pccb, ss))
            return -1;

      perq = usb_stor_buf[0];
      modi = usb_stor_buf[1];

      if ((perq & 0x1f) == 0x1f) {
            /* skip unknown devices */
            return 0;
      }
      if ((modi&0x80) == 0x80) {
            /* drive is removable */
            dev_desc->removable = 1;
      }
      memcpy(&dev_desc->vendor[0], &usb_stor_buf[8], 8);
      memcpy(&dev_desc->product[0], &usb_stor_buf[16], 16);
      memcpy(&dev_desc->revision[0], &usb_stor_buf[32], 4);
      dev_desc->vendor[8] = 0;
      dev_desc->product[16] = 0;
      dev_desc->revision[4] = 0;
#ifdef CONFIG_USB_BIN_FIXUP
      usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
                  (uchar *)dev_desc->product);
#endif /* CONFIG_USB_BIN_FIXUP */
      USB_STOR_PRINTF("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
                  usb_stor_buf[3]);
      if (usb_test_unit_ready(pccb, ss)) {
            printf("Device NOT ready\n"
                   "   Request Sense returned %02X %02X %02X\n",
                   pccb->sense_buf[2], pccb->sense_buf[12],
                   pccb->sense_buf[13]);
            if (dev_desc->removable == 1) {
                  dev_desc->type = perq;
                  return 1;
            }
            return 0;
      }
      pccb->pdata = (unsigned char *)&cap[0];
      memset(pccb->pdata, 0, 8);
      if (usb_read_capacity(pccb, ss) != 0) {
            printf("READ_CAP ERROR\n");
            cap[0] = 2880;
            cap[1] = 0x200;
      }
      USB_STOR_PRINTF("Read Capacity returns: 0x%lx, 0x%lx\n", cap[0],
                  cap[1]);
#if 0
      if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
            cap[0] >>= 16;
#endif
      cap[0] = cpu_to_be32(cap[0]);
      cap[1] = cpu_to_be32(cap[1]);

      /* this assumes bigendian! */
      cap[0] += 1;
      capacity = &cap[0];
      blksz = &cap[1];
      USB_STOR_PRINTF("Capacity = 0x%lx, blocksz = 0x%lx\n",
                  *capacity, *blksz);
      dev_desc->lba = *capacity;
      dev_desc->blksz = *blksz;
      dev_desc->type = perq;
      USB_STOR_PRINTF(" address %d\n", dev_desc->target);
      USB_STOR_PRINTF("partype: %d\n", dev_desc->part_type);

      init_part(dev_desc);

      USB_STOR_PRINTF("partype: %d\n", dev_desc->part_type);
      return 1;
}

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