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 <linux/config.h>
  33 #include <scsi/scsi.h>
  34 #include <scsi/scsi_cmnd.h>
  35 #include <scsi/scsi_device.h>
  36
  37 #include "usb.h"
  38 #include "transport.h"
  39 #include "protocol.h"
  40 #include "debug.h"
  41 #include "dpcm.h"
  42 #include "sddr09.h"
  43
  44 /*
  45  * Transport for the Microtech DPCM-USB
  46  *
  47  */
  48 int dpcm_transport(struct scsi_cmnd *srb, struct us_data *us)
  49 {
  50   int ret;
  51
  52   if(srb == NULL)
  53     return USB_STOR_TRANSPORT_ERROR;
  54
  55   US_DEBUGP("dpcm_transport: LUN=%d\n", srb->device->lun);
  56
  57   switch(srb->device->lun) {
  58   case 0:
  59
  60     /*
  61      * LUN 0 corresponds to the CompactFlash card reader.
  62      */
  63     ret = usb_stor_CB_transport(srb, us);
  64     break;
  65
  66 #ifdef CONFIG_USB_STORAGE_SDDR09
  67   case 1:
  68
  69     /*
  70      * LUN 1 corresponds to the SmartMedia card reader.
  71      */
  72
  73     /*
  74      * Set the LUN to 0 (just in case).
  75      */
  76     srb->device->lun = 0; us->srb->device->lun = 0;
  77     ret = sddr09_transport(srb, us);
  78     srb->device->lun = 1; us->srb->device->lun = 1;
  79     break;
  80
  81 #endif
  82
  83   default:
  84     US_DEBUGP("dpcm_transport: Invalid LUN %d\n", srb->device->lun);
  85     ret = USB_STOR_TRANSPORT_ERROR;
  86     break;
  87   }
  88   return ret;
  89 }