Add new USB API to get the port path of a USB device.

MFC after:	2 weeks
Requested by:	emaste @

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/libusb/libusb20_ugen20.c b/lib/libusb/libusb20_ugen20.c
index 0846eb4..a4c973e 100644
--- a/lib/libusb/libusb20_ugen20.c
+++ b/lib/libusb/libusb20_ugen20.c
@@ -73,6 +73,7 @@ static libusb20_reset_device_t ugen20_reset_device;
 static libusb20_check_connected_t ugen20_check_connected;
 static libusb20_set_power_mode_t ugen20_set_power_mode;
 static libusb20_get_power_mode_t ugen20_get_power_mode;
+static libusb20_get_port_path_t ugen20_get_port_path;
 static libusb20_get_power_usage_t ugen20_get_power_usage;
 static libusb20_kernel_driver_active_t ugen20_kernel_driver_active;
 static libusb20_detach_kernel_driver_t ugen20_detach_kernel_driver;
@@ -644,6 +645,22 @@ ugen20_get_power_mode(struct libusb20_device *pdev, uint8_t *power_mode)
 }
 
 static int
+ugen20_get_port_path(struct libusb20_device *pdev, uint8_t *buf, uint8_t bufsize)
+{
+	struct usb_device_port_path udpp;
+
+	if (ioctl(pdev->file_ctrl, USB_GET_DEV_PORT_PATH, &udpp))
+		return (LIBUSB20_ERROR_OTHER);
+
+	if (udpp.udp_port_level > bufsize)
+		return (LIBUSB20_ERROR_OVERFLOW);
+
+	memcpy(buf, udpp.udp_port_no, udpp.udp_port_level);
+
+	return (udpp.udp_port_level);	/* success */
+}
+
+static int
 ugen20_get_power_usage(struct libusb20_device *pdev, uint16_t *power_usage)
 {
 	int temp;