usb: Wait after sending Set Configuration request

Some devices, like the SanDisk Cruzer Pop need some time to process
the Set Configuration request, so wait a little until they are ready.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Stephen Warren <swarren@nvidia.com>

diff --git a/common/usb.c b/common/usb.c
index 63429d4..205041b 100644 (file)
--- a/common/usb.c
+++ b/common/usb.c
@@ -1107,6 +1107,14 @@ int usb_select_config(struct usb_device *dev)
                        "len %d, status %lX\n", dev->act_len, dev->status);
                return err;
        }
+
+       /*
+        * Wait until the Set Configuration request gets processed by the
+        * device. This is required by at least SanDisk Cruzer Pop USB 2.0
+        * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
+        */
+       mdelay(10);
+
        debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
              dev->descriptor.iManufacturer, dev->descriptor.iProduct,
              dev->descriptor.iSerialNumber);