initializers.c

Go to the documentation of this file.

/* Special Initializers for certain USB Mass Storage devices
 *
 * Current development and maintenance by:
 *   (c) 1999, 2000 Matthew Dharm ([email protected])
 *
 * This driver is based on the 'USB Mass Storage Class' document. This
 * describes in detail the protocol used to communicate with such
 * devices.  Clearly, the designers had SCSI and ATAPI commands in
 * mind when they created this document.  The commands are all very
 * similar to commands in the SCSI-II and ATAPI specifications.
 *
 * It is important to note that in a number of cases this class
 * exhibits class-specific exemptions from the USB specification.
 * Notably the usage of NAK, STALL and ACK differs from the norm, in
 * that they are used to communicate wait, failed and OK on commands.
 *
 * Also, for certain devices, the interrupt endpoint is used to convey
 * status of a command.
 *
 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
 * information about this driver.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/errno.h>

#include "usb.h"
#include "initializers.h"
#include "debug.h"
#include "transport.h"

/* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
 * mode */
int usb_stor_euscsi_init(struct us_data *us)
{
    int result;

    US_DEBUGP("Attempting to init eUSCSI bridge...\n");
    us->iobuf[0] = 0x1;
    result = usb_stor_control_msg(us, us->send_ctrl_pipe,
            0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
            0x01, 0x0, us->iobuf, 0x1, 5000);
    US_DEBUGP("-- result is %d\n", result);

    return 0;
}

/* This function is required to activate all four slots on the UCR-61S2B
 * flash reader */
int usb_stor_ucr61s2b_init(struct us_data *us)
{
    struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
    struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
    int res;
    unsigned int partial;
    static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";

    US_DEBUGP("Sending UCR-61S2B initialization packet...\n");

    bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
    bcb->Tag = 0;
    bcb->DataTransferLength = cpu_to_le32(0);
    bcb->Flags = bcb->Lun = 0;
    bcb->Length = sizeof(init_string) - 1;
    memset(bcb->CDB, 0, sizeof(bcb->CDB));
    memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);

    res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
            US_BULK_CB_WRAP_LEN, &partial);
    if (res)
        return -EIO;

    US_DEBUGP("Getting status packet...\n");
    res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
            US_BULK_CS_WRAP_LEN, &partial);
    if (res)
        return -EIO;

    return 0;
}

/* This places the HUAWEI E220 devices in multi-port mode */
int usb_stor_huawei_e220_init(struct us_data *us)
{
    int result;

    result = usb_stor_control_msg(us, us->send_ctrl_pipe,
                      USB_REQ_SET_FEATURE,
                      USB_TYPE_STANDARD | USB_RECIP_DEVICE,
                      0x01, 0x0, NULL, 0x0, 1000);
    US_DEBUGP("Huawei mode set result is %d\n", result);
    return 0;
}