Exemplo n.º 1
0
int jtag_libusb_set_configuration(jtag_libusb_device_handle *devh,
		int configuration)
{
	struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);
	int retCode = -99;

	struct libusb_config_descriptor *config = NULL;
	int current_config = -1;

	retCode = libusb_get_configuration(devh, &current_config);
	if (retCode != 0)
		return retCode;

	retCode = libusb_get_config_descriptor(udev, configuration, &config);
	if (retCode != 0 || config == NULL)
		return retCode;

	/* Only change the configuration if it is not already set to the
	   same one. Otherwise this issues a lightweight reset and hangs
	   LPC-Link2 with JLink firmware. */
	if (current_config != config->bConfigurationValue)
		retCode = libusb_set_configuration(devh, config->bConfigurationValue);

	libusb_free_config_descriptor(config);

	return retCode;
}
Exemplo n.º 2
0
int jtag_libusb_set_configuration(jtag_libusb_device_handle *devh,
		int configuration)
{
	struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);

	return usb_set_configuration(devh,
			udev->config[configuration].bConfigurationValue);
}
Exemplo n.º 3
0
int jtag_libusb_choose_interface(struct jtag_libusb_device_handle *devh,
		unsigned int *usb_read_ep,
		unsigned int *usb_write_ep,
		int bclass, int subclass, int protocol)
{
	struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);
	const struct libusb_interface *inter;
	const struct libusb_interface_descriptor *interdesc;
	const struct libusb_endpoint_descriptor *epdesc;
	struct libusb_config_descriptor *config;

	*usb_read_ep = *usb_write_ep = 0;

	libusb_get_config_descriptor(udev, 0, &config);
	for (int i = 0; i < (int)config->bNumInterfaces; i++) {
		inter = &config->interface[i];

		interdesc = &inter->altsetting[0];
		for (int k = 0;
		     k < (int)interdesc->bNumEndpoints; k++) {
			if ((bclass > 0 && interdesc->bInterfaceClass != bclass) ||
			    (subclass > 0 && interdesc->bInterfaceSubClass != subclass) ||
			    (protocol > 0 && interdesc->bInterfaceProtocol != protocol))
				continue;

			epdesc = &interdesc->endpoint[k];

			uint8_t epnum = epdesc->bEndpointAddress;
			bool is_input = epnum & 0x80;
			LOG_DEBUG("usb ep %s %02x",
				  is_input ? "in" : "out", epnum);

			if (is_input)
				*usb_read_ep = epnum;
			else
				*usb_write_ep = epnum;

			if (*usb_read_ep && *usb_write_ep) {
				LOG_DEBUG("Claiming interface %d", (int)interdesc->bInterfaceNumber);
				libusb_claim_interface(devh, (int)interdesc->bInterfaceNumber);
				libusb_free_config_descriptor(config);
				return ERROR_OK;
			}
		}
	}
	libusb_free_config_descriptor(config);

	return ERROR_FAIL;
}
Exemplo n.º 4
0
int jtag_libusb_set_configuration(jtag_libusb_device_handle *devh,
				  int configuration)
{
	struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);
	int retCode = -99;

	struct libusb_config_descriptor *config = NULL;

	libusb_get_config_descriptor(udev, configuration, &config);
	retCode = libusb_set_configuration(devh, config->bConfigurationValue);

	libusb_free_config_descriptor(config);

	return retCode;
}