diff options
Diffstat (limited to 'libusb/os/driver/set_interface.c')
| -rw-r--r-- | libusb/os/driver/set_interface.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/libusb/os/driver/set_interface.c b/libusb/os/driver/set_interface.c new file mode 100644 index 0000000..d7732f6 --- /dev/null +++ b/libusb/os/driver/set_interface.c @@ -0,0 +1,123 @@ +/* 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; +} + |