LXR linux/drivers/usb/storage/initializers.c

   1/*
   2 * Special Initializers for certain USB Mass Storage devices
   3 *
   4 * Current development and maintenance by:
   5 *   (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
   6 *
   7 * This driver is based on the 'USB Mass Storage Class' document. This
   8 * describes in detail the protocol used to communicate with such
   9 * devices.  Clearly, the designers had SCSI and ATAPI commands in
  10 * mind when they created this document.  The commands are all very
  11 * similar to commands in the SCSI-II and ATAPI specifications.
  12 *
  13 * It is important to note that in a number of cases this class
  14 * exhibits class-specific exemptions from the USB specification.
  15 * Notably the usage of NAK, STALL and ACK differs from the norm, in
  16 * that they are used to communicate wait, failed and OK on commands.
  17 *
  18 * Also, for certain devices, the interrupt endpoint is used to convey
  19 * status of a command.
  20 *
  21 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
  22 * information about this driver.
  23 *
  24 * This program is free software; you can redistribute it and/or modify it
  25 * under the terms of the GNU General Public License as published by the
  26 * Free Software Foundation; either version 2, or (at your option) any
  27 * later version.
  28 *
  29 * This program is distributed in the hope that it will be useful, but
  30 * WITHOUT ANY WARRANTY; without even the implied warranty of
  31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  32 * General Public License for more details.
  33 *
  34 * You should have received a copy of the GNU General Public License along
  35 * with this program; if not, write to the Free Software Foundation, Inc.,
  36 * 675 Mass Ave, Cambridge, MA 02139, USA.
  37 */
  38
  39#include <linux/errno.h>
  40
  41#include "usb.h"
  42#include "initializers.h"
  43#include "debug.h"
  44#include "transport.h"
  45
  46/*
  47 * This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
  48 * mode
  49 */
  50int usb_stor_euscsi_init(struct us_data *us)
  51{
  52        int result;
  53
  54        usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
  55        result = usb_stor_control_msg(us, us->send_ctrl_pipe,
  56                        0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
  57                        0x01, 0x0, NULL, 0x0, 5 * HZ);
  58        usb_stor_dbg(us, "-- result is %d\n", result);
  59
  60        return 0;
  61}
  62
  63/*
  64 * This function is required to activate all four slots on the UCR-61S2B
  65 * flash reader
  66 */
  67int usb_stor_ucr61s2b_init(struct us_data *us)
  68{
  69        struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
  70        struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
  71        int res;
  72        unsigned int partial;
  73        static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
  74
  75        usb_stor_dbg(us, "Sending UCR-61S2B initialization packet...\n");
  76
  77        bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
  78        bcb->Tag = 0;
  79        bcb->DataTransferLength = cpu_to_le32(0);
  80        bcb->Flags = bcb->Lun = 0;
  81        bcb->Length = sizeof(init_string) - 1;
  82        memset(bcb->CDB, 0, sizeof(bcb->CDB));
  83        memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
  84
  85        res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
  86                        US_BULK_CB_WRAP_LEN, &partial);
  87        if (res)
  88                return -EIO;
  89
  90        usb_stor_dbg(us, "Getting status packet...\n");
  91        res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
  92                        US_BULK_CS_WRAP_LEN, &partial);
  93        if (res)
  94                return -EIO;
  95
  96        return 0;
  97}
  98
  99/* This places the HUAWEI E220 devices in multi-port mode */
 100int usb_stor_huawei_e220_init(struct us_data *us)
 101{
 102        int result;
 103
 104        result = usb_stor_control_msg(us, us->send_ctrl_pipe,
 105                                      USB_REQ_SET_FEATURE,
 106                                      USB_TYPE_STANDARD | USB_RECIP_DEVICE,
 107                                      0x01, 0x0, NULL, 0x0, 1 * HZ);
 108        usb_stor_dbg(us, "Huawei mode set result is %d\n", result);
 109        return 0;
 110}
 111