- int err = -EINVAL;
- int i;
- int j;
- int config;
-
- /* USB 2.0 section 5.5.3 talks about ep0 maxpacket ...
- * it's fixed size except for full speed devices.
- */
- switch (dev->speed) {
- case USB_SPEED_HIGH: /* fixed at 64 */
- i = 64;
- break;
- case USB_SPEED_FULL: /* 8, 16, 32, or 64 */
- /* to determine the ep0 maxpacket size, read the first 8
- * bytes from the device descriptor to get bMaxPacketSize0;
- * then correct our initial (small) guess.
- */
- // FALLTHROUGH
- case USB_SPEED_LOW: /* fixed at 8 */
- i = 8;
- break;
- default:
- goto fail;
- }
- dev->epmaxpacketin [0] = i;
- dev->epmaxpacketout[0] = i;
-
- for (i = 0; i < NEW_DEVICE_RETRYS; ++i) {
-
- for (j = 0; j < SET_ADDRESS_RETRYS; ++j) {
- err = usb_set_address(dev);
- if (err >= 0)
- break;
- wait_ms(200);
- }
- if (err < 0) {
- dev_err(&dev->dev,
- "device not accepting address %d, error %d\n",
- dev->devnum, err);
- goto fail;
- }
-
- wait_ms(10); /* Let the SET_ADDRESS settle */
-
- /* high and low speed devices don't need this... */
- err = usb_get_device_descriptor(dev, 8);
- if (err >= 8)
- break;
- wait_ms(100);
- }
-
- if (err < 8) {
- dev_err(&dev->dev, "device descriptor read/8, error %d\n", err);
- goto fail;
- }
- if (dev->speed == USB_SPEED_FULL) {
- usb_disable_endpoint(dev, 0);
- usb_endpoint_running(dev, 0, 1);
- usb_endpoint_running(dev, 0, 0);
- dev->epmaxpacketin [0] = dev->descriptor.bMaxPacketSize0;
- dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
- }
-
- /* USB device state == addressed ... still not usable */
-
- err = usb_get_device_descriptor(dev, sizeof(dev->descriptor));
- if (err != (signed)sizeof(dev->descriptor)) {
- dev_err(&dev->dev, "device descriptor read/all, error %d\n", err);
- goto fail;
- }