+/* ask first 8 bytes of device descriptor with this special
+ * GET Descriptor Request, when device address = 0
+ */
+s8 usb_get_dev_desc_simple(usb_device *dev, u8 *buf, u8 size)
+{
+ if(size < 8) {
+ return -1;
+ }
+ usb_get_descriptor(dev, DEVICE, 0, buf, 8);
+
+ if(!buf[7]) {
+ printf("FU: %d\n", buf[7]);
+ return -2;
+ }
+ dev->bMaxPacketSize0 = buf[7];
+ return 0;
+}
+
+s8 usb_get_dev_desc(usb_device *dev, u8 *buf, u8 size)
+{
+ if (size < 0x12 || usb_get_dev_desc_simple(dev, buf, size) < 0) {
+ return -1;
+ }
+ usb_get_descriptor(dev, DEVICE, 0, buf, size >= buf[0] ? buf[0] : size);
+
+ dev->bLength = buf[0];
+ dev->bDescriptorType = buf[1];
+ dev->bcdUSB = (u16) (buf[3] << 8 | buf[2]);
+ dev->bDeviceClass = buf[4];
+ dev->bDeviceSubClass = buf[5];
+ dev->bDeviceProtocoll = buf[6];
+ dev->idVendor = (u16) (buf[9] << 8) | (buf[8]);
+ dev->idProduct = (u16) (buf[11] << 8) | (buf[10]);
+ dev->bcdDevice = (u16) (buf[13] << 8) | (buf[12]);
+ dev->iManufacturer = buf[14];
+ dev->iProduct = buf[15];
+ dev->iSerialNumber = buf[16];
+ dev->bNumConfigurations = buf[17];
+
+ return 0;
+}
+
+s8 usb_get_configuration(usb_device *dev, u8 index, u8 *buf, u8 size)
+{
+ if(size < 8) {
+ return -1;
+ }
+ usb_get_descriptor(dev, CONFIGURATION, index, buf, 8);
+ usb_get_descriptor(dev, CONFIGURATION, index, buf, size >= buf[0] ? buf[0] : size);
+ return 0;
+}
+
+s8 usb_set_address(usb_device *dev, u8 address)
+{
+ u8 buf[64];
+ usb_control_msg(dev, 0x00, SET_ADDRESS, address, 0, 0, buf, 0);
+ return 0;
+}
+
+s8 usb_set_configuration(usb_device *dev, u8 configuration)
+{
+
+ return 0;
+}
+
+s8 usb_set_altinterface(usb_device *dev, u8 alternate)
+{
+
+ return 0;
+}
+
+