[U-Boot] [PATCH 4/7] usb: Wait after sending Set Configuration request

Marek Vasut
2016-05-03T20:51:17Z

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>
---
common/usb.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/common/usb.c b/common/usb.c
index 63429d4..205041b 100644
--- 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);
--
2.7.0