drivers/usb/storage/dpcm.c

   1 /* Driver for Microtech DPCM-USB CompactFlash/SmartMedia reader
   2  *
   3  * $Id: dpcm.c,v 1.4 2001/06/11 02:54:25 mdharm Exp $
   4  *
   5  * DPCM driver v0.1:
   6  *
   7  * First release
   8  *
   9  * Current development and maintenance by:
  10  *   (c) 2000 Brian Webb (webbb@earthlink.net)
  11  *
  12  * This device contains both a CompactFlash card reader, which
  13  * uses the Control/Bulk w/o Interrupt protocol and
  14  * a SmartMedia card reader that uses the same protocol
  15  * as the SDDR09.
  16  *
  17  * This program is free software; you can redistribute it and/or modify it
  18  * under the terms of the GNU General Public License as published by the
  19  * Free Software Foundation; either version 2, or (at your option) any
  20  * later version.
  21  *
  22  * This program is distributed in the hope that it will be useful, but
  23  * WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  25  * General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License along
  28  * with this program; if not, write to the Free Software Foundation, Inc.,
  29  * 675 Mass Ave, Cambridge, MA 02139, USA.
  30  */
  31
  32 #include <scsi/scsi.h>
  33 #include <scsi/scsi_cmnd.h>
  34 #include <scsi/scsi_device.h>
  35
  36 #include "usb.h"
  37 #include "transport.h"
  38 #include "protocol.h"
  39 #include "debug.h"
  40 #include "dpcm.h"
  41 #include "sddr09.h"
  42
  43 /*
  44  * Transport for the Microtech DPCM-USB
  45  *
  46  */
  47 int dpcm_transport(struct scsi_cmnd *srb, struct us_data *us)
  48 {
  49         int ret;
  50
  51         if (srb == NULL)
  52                 return USB_STOR_TRANSPORT_ERROR;
  53
  54         US_DEBUGP("dpcm_transport: LUN=%d\n", srb->device->lun);
  55
  56         switch (srb->device->lun) {
  57                 case 0:
  58
  59                         /*
  60                          * LUN 0 corresponds to the CompactFlash card reader.
  61                          */
  62                         ret = usb_stor_CB_transport(srb, us);
  63                         break;
  64
  65 #ifdef CONFIG_USB_STORAGE_SDDR09
  66                 case 1:
  67
  68                         /*
  69                          * LUN 1 corresponds to the SmartMedia card reader.
  70                          */
  71
  72                         /*
  73                          * Set the LUN to 0 (just in case).
  74                          */
  75                         srb->device->lun = 0; us->srb->device->lun = 0;
  76                         ret = sddr09_transport(srb, us);
  77                         srb->device->lun = 1; us->srb->device->lun = 1;
  78                         break;
  79
  80 #endif
  81
  82                 default:
  83                         US_DEBUGP("dpcm_transport: Invalid LUN %d\n", srb->device->lun);
  84                         ret = USB_STOR_TRANSPORT_ERROR;
  85                         break;
  86         }
  87         return ret;
  88 }