From 3406e9d8afcc8ade8cb3e697be2bcf9cc85c9d04 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Sun, 30 Oct 2022 23:38:35 +0100
Subject: [PATCH] usb: Add 1ms delay after first Get Descriptor request

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 before
issuing subsequent requests to avoid probe failure with
this device, since it can be used to connect USB keyboards.

Signed-off-by: Marek Vasut <marex@denx.de>
Tested-by: Janne Grunau <j@jannau.net>
---
 common/usb.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/common/usb.c b/common/usb.c
index 6fcf1e8428..ae9253dfc0 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;
-- 
2.39.5