drivers/usb/storage/dpcm.c

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