LCOV - code coverage report
Current view: top level - lkbce/drivers/usb/storage - initializers.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 28 28 100.0 %
Date: 2017-01-25 Functions: 3 3 100.0 %

          Line data    Source code
       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           1 :         int result;
      50             : 
      51             :         US_DEBUGP("Attempting to init eUSCSI bridge...\n");
      52           1 :         us->iobuf[0] = 0x1;
      53           3 :         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           1 :         return 0;
      59             : }
      60             : 
      61             : /* This function is required to activate all four slots on the UCR-61S2B
      62             :  * flash reader */
      63             : int usb_stor_ucr61s2b_init(struct us_data *us)
      64             : {
      65           3 :         struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
      66           3 :         struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
      67           1 :         int res;
      68           1 :         unsigned int partial;
      69          13 :         static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
      70           2 : 
      71           2 :         US_DEBUGP("Sending UCR-61S2B initialization packet...\n");
      72             : 
      73           1 :         bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
      74           1 :         bcb->Tag = 0;
      75           1 :         bcb->DataTransferLength = cpu_to_le32(0);
      76           3 :         bcb->Flags = bcb->Lun = 0;
      77           1 :         bcb->Length = sizeof(init_string) - 1;
      78           1 :         memset(bcb->CDB, 0, sizeof(bcb->CDB));
      79           1 :         memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
      80             : 
      81           2 :         res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
      82             :                         US_BULK_CB_WRAP_LEN, &partial);
      83           2 :         if (res)
      84           1 :                 return -EIO;
      85             : 
      86             :         US_DEBUGP("Getting status packet...\n");
      87           2 :         res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
      88             :                         US_BULK_CS_WRAP_LEN, &partial);
      89           2 :         if (res)
      90           1 :                 return -EIO;
      91             : 
      92           1 :         return 0;
      93             : }
      94             : 
      95             : /* This places the HUAWEI E220 devices in multi-port mode */
      96             : int usb_stor_huawei_e220_init(struct us_data *us)
      97             : {
      98           1 :         int result;
      99             : 
     100           2 :         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           1 :         return 0;
     106             : }

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