Skip to content

Detact the kernel driver to allow libusb to control the device. #1

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
mithro wants to merge 1 commit into
base: dev
Choose a base branch
from
Open

Detact the kernel driver to allow libusb to control the device. #1

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
17 changes: 17 additions & 0 deletions libusbwrap.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ static libusb_device_handle *libusbOpenWithVidPid(
struct libusb_device **devs;
struct libusb_device *found = NULL;
struct libusb_device *dev;
struct libusb_config_descriptor* desc = NULL;
size_t i = 0;
int status = (int)libusb_get_device_list(ctx, &devs);
CHECK_STATUS(status < 0, NULL, cleanup, libusb_error_name(status));
Expand All @@ -60,11 +61,27 @@ static libusb_device_handle *libusbOpenWithVidPid(
if ( found ) {
status = libusb_open(found, &retVal);
CHECK_STATUS(status < 0, NULL, cleanup, libusb_error_name(status));

if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
// Detact the kernel drivers from this device so we can control it.
status = libusb_get_active_config_descriptor(found, &desc);
CHECK_STATUS(status < 0, NULL, cleanup, libusb_error_name(status));

for (int i = 0; i < desc->bNumInterfaces; i++) {
if (libusb_kernel_driver_active(retVal, i)) {
status = libusb_detach_kernel_driver(retVal, i);
CHECK_STATUS(status < 0, NULL, cleanup, libusb_error_name(status));
}
}
}
} else {
errRender(error, "device not found");
}

cleanup:
if (desc != NULL) {
libusb_free_config_descriptor(desc);
}
libusb_free_device_list(devs, 1);
return retVal;
}
Expand Down