view libuwrap/open_close.c @ 39:b9ecfa54fe2b

fc-duart28-conf: replace find and check-eeprom with single show command The original design with separate find and check-eeprom commands was driven by the assumption that we had to bump off the ftdi_sio driver in order to read the EEPROM, while a USB device tree check could be done non-invasively. However, now that we know that we can read the EEPROM non-invasively too, we can simplify the tool with a single show command.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 10 Sep 2023 19:21:20 +0000
parents 80e521d6609c
children
line wrap: on
line source

/*
 * Here we implement functions for opening and closing the libusb device
 * we have located.
 */

#include <stdio.h>
#include <stdlib.h>
#include <usb.h>
#include "open_close.h"

usb_dev_handle *usbwrap_open_dev(struct usb_device *dev, int detach)
{
	usb_dev_handle *usbh;

	usbh = usb_open(dev);
	if (!usbh) {
		fprintf(stderr, "error: usb_open() failed\n");
		exit(1);
	}
	if (detach)
		usb_detach_kernel_driver_np(usbh, 0);
	if (usb_claim_interface(usbh, 0) != 0) {
		fprintf(stderr, "error: usb_claim_interface() failed\n");
		exit(1);
	}
	return usbh;
}

void usbwrap_close_dev(usb_dev_handle *usbh)
{
	usb_release_interface(usbh, 0);
	usb_close(usbh);
}