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       1                 :            : // SPDX-License-Identifier: GPL-2.0+
       2                 :            : /*
       3                 :            :  * Special Initializers for certain USB Mass Storage devices
       4                 :            :  *
       5                 :            :  * Current development and maintenance by:
       6                 :            :  *   (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
       7                 :            :  *
       8                 :            :  * This driver is based on the 'USB Mass Storage Class' document. This
       9                 :            :  * describes in detail the protocol used to communicate with such
      10                 :            :  * devices.  Clearly, the designers had SCSI and ATAPI commands in
      11                 :            :  * mind when they created this document.  The commands are all very
      12                 :            :  * similar to commands in the SCSI-II and ATAPI specifications.
      13                 :            :  *
      14                 :            :  * It is important to note that in a number of cases this class
      15                 :            :  * exhibits class-specific exemptions from the USB specification.
      16                 :            :  * Notably the usage of NAK, STALL and ACK differs from the norm, in
      17                 :            :  * that they are used to communicate wait, failed and OK on commands.
      18                 :            :  *
      19                 :            :  * Also, for certain devices, the interrupt endpoint is used to convey
      20                 :            :  * status of a command.
      21                 :            :  */
      22                 :            : 
      23                 :            : #include <linux/errno.h>
      24                 :            : 
      25                 :            : #include "usb.h"
      26                 :            : #include "initializers.h"
      27                 :            : #include "debug.h"
      28                 :            : #include "transport.h"
      29                 :            : 
      30                 :            : /*
      31                 :            :  * This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
      32                 :            :  * mode
      33                 :            :  */
      34                 :          0 : int usb_stor_euscsi_init(struct us_data *us)
      35                 :            : {
      36                 :            :         int result;
      37                 :            : 
      38                 :            :         usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
      39                 :          0 :         result = usb_stor_control_msg(us, us->send_ctrl_pipe,
      40                 :            :                         0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
      41                 :            :                         0x01, 0x0, NULL, 0x0, 5 * HZ);
      42                 :            :         usb_stor_dbg(us, "-- result is %d\n", result);
      43                 :            : 
      44                 :          0 :         return 0;
      45                 :            : }
      46                 :            : 
      47                 :            : /*
      48                 :            :  * This function is required to activate all four slots on the UCR-61S2B
      49                 :            :  * flash reader
      50                 :            :  */
      51                 :          0 : int usb_stor_ucr61s2b_init(struct us_data *us)
      52                 :            : {
      53                 :          0 :         struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
      54                 :            :         struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
      55                 :            :         int res;
      56                 :            :         unsigned int partial;
      57                 :            :         static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
      58                 :            : 
      59                 :            :         usb_stor_dbg(us, "Sending UCR-61S2B initialization packet...\n");
      60                 :            : 
      61                 :          0 :         bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
      62                 :          0 :         bcb->Tag = 0;
      63                 :          0 :         bcb->DataTransferLength = cpu_to_le32(0);
      64                 :          0 :         bcb->Flags = bcb->Lun = 0;
      65                 :          0 :         bcb->Length = sizeof(init_string) - 1;
      66                 :          0 :         memset(bcb->CDB, 0, sizeof(bcb->CDB));
      67                 :          0 :         memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
      68                 :            : 
      69                 :          0 :         res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
      70                 :            :                         US_BULK_CB_WRAP_LEN, &partial);
      71         [ #  # ]:          0 :         if (res)
      72                 :            :                 return -EIO;
      73                 :            : 
      74                 :            :         usb_stor_dbg(us, "Getting status packet...\n");
      75                 :          0 :         res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
      76                 :            :                         US_BULK_CS_WRAP_LEN, &partial);
      77         [ #  # ]:          0 :         if (res)
      78                 :            :                 return -EIO;
      79                 :            : 
      80                 :          0 :         return 0;
      81                 :            : }
      82                 :            : 
      83                 :            : /* This places the HUAWEI E220 devices in multi-port mode */
      84                 :          0 : int usb_stor_huawei_e220_init(struct us_data *us)
      85                 :            : {
      86                 :            :         int result;
      87                 :            : 
      88                 :          0 :         result = usb_stor_control_msg(us, us->send_ctrl_pipe,
      89                 :            :                                       USB_REQ_SET_FEATURE,
      90                 :            :                                       USB_TYPE_STANDARD | USB_RECIP_DEVICE,
      91                 :            :                                       0x01, 0x0, NULL, 0x0, 1 * HZ);
      92                 :            :         usb_stor_dbg(us, "Huawei mode set result is %d\n", result);
      93                 :          0 :         return 0;
      94                 :            : }