From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Fri, 26 Jun 2026 19:45:00 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wdAbr-00A9Zc-3D for lore@lore.pengutronix.de; Fri, 26 Jun 2026 19:45:00 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1wdAbr-0007YK-4m for lore@pengutronix.de; Fri, 26 Jun 2026 19:44:59 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=tQI6XFmoyT2QjqXnlyY6YDruGVfUUS5gJhuvEcu3JAE=; b=pVz4FmO5tanFNtBJhQiGTW3PmX xF4v8p3GGJuGBuc8/WbOGcE/cBbl2Rek0uQ7FrqhGpu/HLCK1JvwtKrYviZOxm3k8GxY91fLqmm44 Q8kHsPs3IWdir9fcH1glGaztGDzAM3HUrmRnYG3r+AMf78AxoDMAJB4ywcIYAtbSaRrnBLWoYgK0b EM5UdQa2olIVQB6+UWI3y/Z6JMk81RV9ZApxbNpfq9zOyXolhUh+m4rcy7ETPUuEFwcV1kewnFVal udVWgOmk/M/0gxR1KuAQa+hk7PmpX9psYgSsLIbZZ/gGddDR6LKzJljAY3W0/Ii+dVpLZIHNRd62S fwsrx+9Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wdAak-0000000BiXJ-1N3J; Fri, 26 Jun 2026 17:43:50 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wdAag-0000000BiUy-2zQR for barebox@lists.infradead.org; Fri, 26 Jun 2026 17:43:49 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=geraet.lan) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1wdAaf-0003ev-5y; Fri, 26 Jun 2026 19:43:45 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Fri, 26 Jun 2026 19:31:38 +0200 Message-ID: <20260626174342.1923132-3-a.fatoum@barebox.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260626174342.1923132-1-a.fatoum@barebox.org> References: <20260626174342.1923132-1-a.fatoum@barebox.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260626_104346_750613_33A67039 X-CRM114-Status: GOOD ( 10.86 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.0 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 2/5] usb: wait after initial device descriptor read X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) Port over U-Boot commit 3406e9d8afcc8ade8cb3e697be2bcf9cc85c9d04: | 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 | Tested-by: Janne Grunau Assisted-by: Codex:gpt-5.5 Signed-off-by: Ahmad Fatoum --- drivers/usb/core/usb.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index ae87137447c7..c6b3187de17d 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -403,6 +403,17 @@ static int usb_setup_descriptor(struct usb_device *dev, bool do_read) 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; dev->epmaxpacketout[0] = dev->descriptor->bMaxPacketSize0; } -- 2.47.3