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 */
  47 int usb_stor_euscsi_init(struct us_data *us)
  48 {
  49         int result;
  50
  51         usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
  52         result = usb_stor_control_msg(us, us->send_ctrl_pipe,
  53                         0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
  54                         0x01, 0x0, NULL, 0x0, 5 * HZ);
  55         usb_stor_dbg(us, "-- result is %d\n", result);
  56
  57         return 0;
  58 }
  59
  60 /* This function is required to activate all four slots on the UCR-61S2B
  61  * flash reader */
  62 int usb_stor_ucr61s2b_init(struct us_data *us)
  63 {
  64         struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
  65         struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
  66         int res;
  67         unsigned int partial;
  68         static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
  69
  70         usb_stor_dbg(us, "Sending UCR-61S2B initialization packet...\n");
  71
  72         bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
  73         bcb->Tag = 0;
  74         bcb->DataTransferLength = cpu_to_le32(0);
  75         bcb->Flags = bcb->Lun = 0;
  76         bcb->Length = sizeof(init_string) - 1;
  77         memset(bcb->CDB, 0, sizeof(bcb->CDB));
  78         memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
  79
  80         res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
  81                         US_BULK_CB_WRAP_LEN, &partial);
  82         if (res)
  83                 return -EIO;
  84
  85         usb_stor_dbg(us, "Getting status packet...\n");
  86         res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
  87                         US_BULK_CS_WRAP_LEN, &partial);
  88         if (res)
  89                 return -EIO;
  90
  91         return 0;
  92 }
  93
  94 /* This places the HUAWEI E220 devices in multi-port mode */
  95 int usb_stor_huawei_e220_init(struct us_data *us)
  96 {
  97         int result;
  98
  99         result = usb_stor_control_msg(us, us->send_ctrl_pipe,
 100                                       USB_REQ_SET_FEATURE,
 101                                       USB_TYPE_STANDARD | USB_RECIP_DEVICE,
 102                                       0x01, 0x0, NULL, 0x0, 1 * HZ);
 103         usb_stor_dbg(us, "Huawei mode set result is %d\n", result);
 104         return 0;
 105 }