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

   1/* Special Initializers for certain USB Mass Storage devices
   2 *
   3 * Current development and maintenance by:
   4 *   (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
   5 *
   6 * This driver is based on the 'USB Mass Storage Class' document. This
   7 * describes in detail the protocol used to communicate with such
   8 * devices.  Clearly, the designers had SCSI and ATAPI commands in
   9 * mind when they created this document.  The commands are all very
  10 * similar to commands in the SCSI-II and ATAPI specifications.
  11 *
  12 * It is important to note that in a number of cases this class
  13 * exhibits class-specific exemptions from the USB specification.
  14 * Notably the usage of NAK, STALL and ACK differs from the norm, in
  15 * that they are used to communicate wait, failed and OK on commands.
  16 *
  17 * Also, for certain devices, the interrupt endpoint is used to convey
  18 * status of a command.
  19 *
  20 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
  21 * information about this driver.
  22 *
  23 * This program is free software; you can redistribute it and/or modify it
  24 * under the terms of the GNU General Public License as published by the
  25 * Free Software Foundation; either version 2, or (at your option) any
  26 * later version.
  27 *
  28 * This program is distributed in the hope that it will be useful, but
  29 * WITHOUT ANY WARRANTY; without even the implied warranty of
  30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  31 * General Public License for more details.
  32 *
  33 * You should have received a copy of the GNU General Public License along
  34 * with this program; if not, write to the Free Software Foundation, Inc.,
  35 * 675 Mass Ave, Cambridge, MA 02139, USA.
  36 */
  37
  38#include <linux/errno.h>
  39
  40#include "usb.h"
  41#include "initializers.h"
  42#include "debug.h"
  43#include "transport.h"
  44
  45/* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
  46 * mode */
  47int usb_stor_euscsi_init(struct us_data *us)
  48{
  49        int result;
  50
  51        US_DEBUGP("Attempting to init eUSCSI bridge...\n");
  52        us->iobuf[0] = 0x1;
  53        result = usb_stor_control_msg(us, us->send_ctrl_pipe,
  54                        0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
  55                        0x01, 0x0, us->iobuf, 0x1, 5000);
  56        US_DEBUGP("-- result is %d\n", result);
  57
  58        return 0;
  59}
  60
  61/* This function is required to activate all four slots on the UCR-61S2B
  62 * flash reader */
  63int usb_stor_ucr61s2b_init(struct us_data *us)
  64{
  65        struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
  66        struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
  67        int res;
  68        unsigned int partial;
  69        static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
  70
  71        US_DEBUGP("Sending UCR-61S2B initialization packet...\n");
  72
  73        bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
  74        bcb->Tag = 0;
  75        bcb->DataTransferLength = cpu_to_le32(0);
  76        bcb->Flags = bcb->Lun = 0;
  77        bcb->Length = sizeof(init_string) - 1;
  78        memset(bcb->CDB, 0, sizeof(bcb->CDB));
  79        memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
  80
  81        res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
  82                        US_BULK_CB_WRAP_LEN, &partial);
  83        if (res)
  84                return -EIO;
  85
  86        US_DEBUGP("Getting status packet...\n");
  87        res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
  88                        US_BULK_CS_WRAP_LEN, &partial);
  89        if (res)
  90                return -EIO;
  91
  92        return 0;
  93}
  94
  95/* This places the HUAWEI E220 devices in multi-port mode */
  96int usb_stor_huawei_e220_init(struct us_data *us)
  97{
  98        int result;
  99
 100        result = usb_stor_control_msg(us, us->send_ctrl_pipe,
 101                                      USB_REQ_SET_FEATURE,
 102                                      USB_TYPE_STANDARD | USB_RECIP_DEVICE,
 103                                      0x01, 0x0, NULL, 0x0, 1000);
 104        US_DEBUGP("Huawei mode set result is %d\n", result);
 105        return 0;
 106}
 107