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  */
  50 int 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  */
  67 int 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 */
 100 int 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 }