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/* LIBUSB-WIN32, Generic Windows USB Library
* Copyright (c) 2002-2005 Stephan Meyer <ste_meyer@web.de>
*
* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "libusb_driver.h"
NTSTATUS set_interface(libusb_device_t *dev, int interface, int altsetting,
int timeout)
{
NTSTATUS status = STATUS_SUCCESS;
URB *urb;
int i, config_size, tmp_size;
USB_CONFIGURATION_DESCRIPTOR *configuration_descriptor = NULL;
USB_INTERFACE_DESCRIPTOR *interface_descriptor = NULL;
USBD_INTERFACE_INFORMATION *interface_information = NULL;
DEBUG_PRINT_NL();
DEBUG_MESSAGE("set_interface(): interface %d", interface);
DEBUG_MESSAGE("set_interface(): altsetting %d", altsetting);
DEBUG_MESSAGE("set_interface(): timeout %d", timeout);
if(!dev->config.value)
{
DEBUG_ERROR("release_interface(): device is not configured");
return STATUS_INVALID_DEVICE_STATE;
}
configuration_descriptor = get_config_descriptor(dev, dev->config.value,
&config_size);
if(!configuration_descriptor)
{
DEBUG_ERROR("set_interface(): memory_allocation error");
return STATUS_NO_MEMORY;
}
interface_descriptor =
find_interface_desc(configuration_descriptor, config_size,
interface, altsetting);
if(!interface_descriptor)
{
DEBUG_ERROR("set_interface(): interface %d or altsetting %d invalid",
interface, altsetting);
ExFreePool(configuration_descriptor);
return STATUS_UNSUCCESSFUL;
}
tmp_size = sizeof(struct _URB_SELECT_INTERFACE)
+ interface_descriptor->bNumEndpoints
* sizeof(USBD_PIPE_INFORMATION);
urb = ExAllocatePool(NonPagedPool, tmp_size);
if(!urb)
{
DEBUG_ERROR("set_interface(): memory_allocation error");
ExFreePool(configuration_descriptor);
return STATUS_NO_MEMORY;
}
memset(urb, 0, tmp_size);
urb->UrbHeader.Function = URB_FUNCTION_SELECT_INTERFACE;
urb->UrbHeader.Length = (USHORT)tmp_size;
urb->UrbSelectInterface.ConfigurationHandle = dev->config.handle;
urb->UrbSelectInterface.Interface.Length =
sizeof(struct _USBD_INTERFACE_INFORMATION);
urb->UrbSelectInterface.Interface.NumberOfPipes =
interface_descriptor->bNumEndpoints;
urb->UrbSelectInterface.Interface.Length +=
interface_descriptor->bNumEndpoints
* sizeof(struct _USBD_PIPE_INFORMATION);
urb->UrbSelectInterface.Interface.InterfaceNumber = (UCHAR)interface;
urb->UrbSelectInterface.Interface.AlternateSetting = (UCHAR)altsetting;
interface_information = &urb->UrbSelectInterface.Interface;
for(i = 0; i < interface_descriptor->bNumEndpoints; i++)
{
interface_information->Pipes[i].MaximumTransferSize
= LIBUSB0_MAX_READ_WRITE;
}
status = call_usbd(dev, urb, IOCTL_INTERNAL_USB_SUBMIT_URB, timeout);
if(!NT_SUCCESS(status) || !USBD_SUCCESS(urb->UrbHeader.Status))
{
DEBUG_ERROR("set_interface(): setting interface failed: status: 0x%x, "
"urb-status: 0x%x", status, urb->UrbHeader.Status);
ExFreePool(configuration_descriptor);
ExFreePool(urb);
return STATUS_UNSUCCESSFUL;
}
update_pipe_info(dev, interface_information);
ExFreePool(configuration_descriptor);
ExFreePool(urb);
return status;
}
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