diff options
Diffstat (limited to 'common/usb.c')
| -rw-r--r-- | common/usb.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/common/usb.c b/common/usb.c index 6fcf1e8428e..ae9253dfc0e 100644 --- a/common/usb.c +++ b/common/usb.c @@ -999,6 +999,17 @@ static int usb_setup_descriptor(struct usb_device *dev, bool do_read) err = get_descriptor_len(dev, 64, 8); if (err) return err; + + /* + * Logitech Unifying Receiver 046d:c52b bcdDevice 12.10 seems + * sensitive about the first Get Descriptor request. If there + * are any other requests in the same microframe, the device + * reports bogus data, first of the descriptor parts is not + * sent to the host. Wait over one microframe duration here + * (1mS for USB 1.x , 125uS for USB 2.0) to avoid triggering + * the issue. + */ + mdelay(1); } dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0; |