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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"
#include <stdlib.h>
NTSTATUS set_configuration(libusb_device_t *dev,
int configuration,
int timeout)
{
NTSTATUS status = STATUS_SUCCESS;
URB urb, *urb_ptr = NULL;
USB_CONFIGURATION_DESCRIPTOR *configuration_descriptor = NULL;
USB_INTERFACE_DESCRIPTOR *interface_descriptor = NULL;
USBD_INTERFACE_LIST_ENTRY *interfaces = NULL;
int i, j, interface_number, desc_size, config_index, ret;
// check if this config value is already set
if ((configuration > 0) && dev->config.value == configuration)
{
return STATUS_SUCCESS;
}
// check if this config index is already set
if ((configuration < 0) && dev->config.value && dev->config.index == (abs(configuration)-1))
{
return STATUS_SUCCESS;
}
memset(&urb, 0, sizeof(URB));
if (configuration == 0)
{
urb.UrbHeader.Function = URB_FUNCTION_SELECT_CONFIGURATION;
urb.UrbHeader.Length = sizeof(struct _URB_SELECT_CONFIGURATION);
status = call_usbd(dev, &urb, IOCTL_INTERNAL_USB_SUBMIT_URB, timeout);
if (!NT_SUCCESS(status) || !USBD_SUCCESS(urb.UrbHeader.Status))
{
USBERR("setting configuration %d failed: status: 0x%x, urb-status: 0x%x\n",
configuration, status, urb.UrbHeader.Status);
return status;
}
dev->config.handle = urb.UrbSelectConfiguration.ConfigurationHandle;
dev->config.value = 0;
clear_pipe_info(dev);
return status;
}
if (configuration <= SET_CONFIG_ACTIVE_CONFIG)
{
// note: as of v1.2.4.0, the active/default configuration is
// always the first configuration the device returns. (index 0)
configuration=-1;
}
USBMSG("setting configuration %s %d timeout=%d",
(configuration < 0) ? "index" : "value",
(configuration < 0) ? abs(configuration) - 1 : configuration,
timeout);
// If configuration is negative, it is retrieved by index.
//
configuration_descriptor = get_config_descriptor(dev, configuration,
&desc_size, &config_index);
if (!configuration_descriptor)
{
USBERR0("getting configuration descriptor failed");
return STATUS_INVALID_PARAMETER;
}
// if we passed an index in we can check here to see
// if the device is already configured with this value
if (dev->config.value == configuration_descriptor->bConfigurationValue)
{
UpdateContextConfigDescriptor(
dev,
configuration_descriptor,
desc_size,
configuration_descriptor->bConfigurationValue,
config_index);
status = STATUS_SUCCESS;
goto SetConfigurationDone;
}
// MEMORY ALLOCATION BEGINS
interfaces =
ExAllocatePool(NonPagedPool,(configuration_descriptor->bNumInterfaces + 1)
* sizeof(USBD_INTERFACE_LIST_ENTRY));
if (!interfaces)
{
USBERR0("memory allocation failed\n");
status = STATUS_NO_MEMORY;
ExFreePool(configuration_descriptor);
goto SetConfigurationDone;
}
memset(interfaces, 0, (configuration_descriptor->bNumInterfaces + 1)
* sizeof(USBD_INTERFACE_LIST_ENTRY));
interface_number = 0;
for (i = 0; i < configuration_descriptor->bNumInterfaces; i++)
{
for (j = interface_number; j < LIBUSB_MAX_NUMBER_OF_INTERFACES; j++)
{
interface_descriptor =
find_interface_desc(configuration_descriptor, desc_size, j, 0);
if (interface_descriptor)
{
interface_number = ++j;
break;
}
}
if (!interface_descriptor)
{
USBERR("unable to find interface descriptor at index %d\n", i);
status = STATUS_INVALID_PARAMETER;
ExFreePool(configuration_descriptor);
goto SetConfigurationDone;
}
else
{
USBMSG("found interface %d\n",
interface_descriptor->bInterfaceNumber);
interfaces[i].InterfaceDescriptor = interface_descriptor;
}
}
urb_ptr = USBD_CreateConfigurationRequestEx(configuration_descriptor, interfaces);
if (!urb_ptr)
{
USBERR0("memory allocation failed\n");
status = STATUS_NO_MEMORY;
ExFreePool(configuration_descriptor);
goto SetConfigurationDone;
}
for (i = 0; i < configuration_descriptor->bNumInterfaces; i++)
{
for (j = 0; j < (int)interfaces[i].Interface->NumberOfPipes; j++)
{
interfaces[i].Interface->Pipes[j].MaximumTransferSize = LIBUSB_MAX_READ_WRITE;
}
}
USBDBG("#%d %s passing configuration request to target-device.",
dev->id, dev->device_id);
status = call_usbd(dev, urb_ptr, IOCTL_INTERNAL_USB_SUBMIT_URB, timeout);
if (!NT_SUCCESS(status) || !USBD_SUCCESS(urb_ptr->UrbHeader.Status))
{
USBERR("setting configuration %d failed: status: 0x%x, urb-status: 0x%x\n",
configuration, status, urb_ptr->UrbHeader.Status);
if (NT_SUCCESS(status)) status = urb_ptr->UrbHeader.Status;
ExFreePool(configuration_descriptor);
goto SetConfigurationDone;
}
dev->config.handle = urb_ptr->UrbSelectConfiguration.ConfigurationHandle;
clear_pipe_info(dev);
for (i = 0; i < configuration_descriptor->bNumInterfaces; i++)
{
update_pipe_info(dev, interfaces[i].Interface);
}
UpdateContextConfigDescriptor(dev, configuration_descriptor, desc_size, configuration_descriptor->bConfigurationValue, config_index);
SetConfigurationDone:
if (interfaces)
ExFreePool(interfaces);
if (urb_ptr)
ExFreePool(urb_ptr);
return status;
}
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