From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80278C433E0 for ; Fri, 19 Jun 2020 15:30:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 524FA2193E for ; Fri, 19 Jun 2020 15:30:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592580604; bh=uqtwbsRdgA9KQ1Qk38D0uiKsZpvjs6cUPkTcF18vUNM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZAAmbX7noeOjuvrkLzgzxqcyK6knnL+7MmA6rD67pchL/5p8CGQvQPpkfmL1G3FA2 V4qjZNMvfWynrOUhHCU8l/QHaiONsjAmsRZfHYIld5Ne/GHcs9aGfoiBTR2mvDCCnk o//9BTp9DFjIzIek2keHKhEp/poGkF5ys/V8x0tc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404760AbgFSPaD (ORCPT ); Fri, 19 Jun 2020 11:30:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:33606 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404736AbgFSP34 (ORCPT ); Fri, 19 Jun 2020 11:29:56 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 14A272193E; Fri, 19 Jun 2020 15:29:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592580595; bh=uqtwbsRdgA9KQ1Qk38D0uiKsZpvjs6cUPkTcF18vUNM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FKl1wQaFMNX4MrVd2dAqaCRRV2H9EYd4fcoexDIjylMRNX7SAJkPcf4HHInwfwP+y 8Fj4SMl2bJaNArdEEdVdtN85JAA+qFSWQ7VuhzEZBg8lb/iDho5xofoUqCd01+vVeQ JTIcc4Dd5IT4ABSv70u3rzLDs4mMW5f0uuBUgNnE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Macpaul Lin , Min Guo , Bin Liu Subject: [PATCH 5.7 308/376] usb: musb: mediatek: add reset FADDR to zero in reset interrupt handle Date: Fri, 19 Jun 2020 16:33:46 +0200 Message-Id: <20200619141724.917772203@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141710.350494719@linuxfoundation.org> References: <20200619141710.350494719@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Macpaul Lin commit 402bcac4b25b520c89ba60db85eb6316f36e797f upstream. When receiving reset interrupt, FADDR need to be reset to zero in peripheral mode. Otherwise ep0 cannot do enumeration when re-plugging USB cable. Signed-off-by: Macpaul Lin Acked-by: Min Guo Signed-off-by: Bin Liu Link: https://lore.kernel.org/r/20200525025049.3400-5-b-liu@ti.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/mediatek.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/usb/musb/mediatek.c +++ b/drivers/usb/musb/mediatek.c @@ -208,6 +208,12 @@ static irqreturn_t generic_interrupt(int musb->int_rx = musb_clearw(musb->mregs, MUSB_INTRRX); musb->int_tx = musb_clearw(musb->mregs, MUSB_INTRTX); + if ((musb->int_usb & MUSB_INTR_RESET) && !is_host_active(musb)) { + /* ep0 FADDR must be 0 when (re)entering peripheral mode */ + musb_ep_select(musb->mregs, 0); + musb_writeb(musb->mregs, MUSB_FADDR, 0); + } + if (musb->int_usb || musb->int_tx || musb->int_rx) retval = musb_interrupt(musb);