+ cleargbuf();
+ usb_get_descriptor(dev, CONFIGURATION, index, gbuf, 8);
+ usb_get_descriptor(dev, CONFIGURATION, index, gbuf, gbuf[0]);
+
+ conf->bLength = gbuf[0];
+ conf->bDescriptorType = gbuf[1];
+ conf->wTotalLength = (u16) (gbuf[3] << 8 | gbuf[2]);
+ conf->bNumInterfaces = gbuf[4];
+ conf->bConfigurationValue = gbuf[5];
+ conf->iConfiguration = gbuf[6];
+ conf->bmAttributes = gbuf[7];
+ conf->bMaxPower = gbuf[8];
+ conf->intf = NULL;
+
+ return 0;
+}
+
+/* returns more information about CONFIGURATION, including
+ * INTERFACE(s) and ENDPOINT(s)
+ * usb_get_desc_configuration() must be called for this device before
+ */
+s8 usb_get_desc_config_ext(struct usb_device *dev, u8 index, struct usb_conf *conf)
+{
+ cleargbuf();
+
+ usb_get_desc_configuration(dev, index, conf);
+ usb_get_descriptor(dev, CONFIGURATION, index, gbuf, dev->conf->wTotalLength);
+
+ u8 i,j,off=9;
+ struct usb_intf *ifs = dev->conf->intf = (struct usb_intf*) malloc(sizeof(struct usb_intf));
+ for(i=1; i <= dev->conf->bNumInterfaces; i++) {
+ if(i!=1) {
+ ifs->next = (struct usb_intf*) malloc(sizeof(struct usb_intf));
+ ifs = ifs->next;
+ }
+ ifs->bLength = gbuf[off+0];
+ ifs->bDescriptorType = gbuf[off+1];
+ ifs->bInterfaceNumber = gbuf[off+2];
+ ifs->bAlternateSetting = gbuf[off+3];
+ ifs->bNumEndpoints = gbuf[off+4];
+ ifs->bInterfaceClass = gbuf[off+5];
+ ifs->bInterfaceSubClass = gbuf[off+6];
+ ifs->bInterfaceProtocol = gbuf[off+7];
+ ifs->iInterface = gbuf[off+8];
+
+ off += 9;
+
+ struct usb_endp *ep = ifs->endp = (struct usb_endp*) malloc(sizeof(struct usb_endp));
+ for(j=1; j <= ifs->bNumEndpoints; j++) {
+ /* skip HID Device Descriptor (see lsusb) */
+ if(gbuf[off+1] == 33) {
+ j--;
+ off += 9;
+ continue;
+ }
+
+ if(j!=1) {
+ ep->next = (struct usb_endp*) malloc(sizeof(struct usb_endp));
+ ep = ep->next;
+ }
+
+ ep->bLength = gbuf[off+0];
+ ep->bDescriptorType = gbuf[off+1];
+ ep->bEndpointAddress = gbuf[off+2];
+ ep->bmAttributes = gbuf[off+3];
+ ep->wMaxPacketSize = (u16) ((gbuf[off+5] << 8) | (gbuf[off+4]));
+ ep->bInterval = gbuf[off+6];
+
+ off += 7;
+ }