From patchwork Mon May 25 02:50:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bin Liu X-Patchwork-Id: 11567875 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5EF2E13B4 for ; Mon, 25 May 2020 02:50:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3DE342089D for ; Mon, 25 May 2020 02:50:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="nvIYRXQ4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388742AbgEYCux (ORCPT ); Sun, 24 May 2020 22:50:53 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:59884 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388450AbgEYCuv (ORCPT ); Sun, 24 May 2020 22:50:51 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 04P2ooNS103750; Sun, 24 May 2020 21:50:50 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1590375050; bh=NUWycC2SXXYO8B9Yzs08GTXNQIgLGElyOSZbaQLH+ro=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=nvIYRXQ4b0kxZPrGSeESBnHI3n4bn8myDsQWFBPJns8jvMlsFv/Ew3tiJFKyUT3XZ eSRLhO0VLXG4B4AAWCX2RYVl1WApahPeSUxUJ6Fj5+d4zNh7XfkZ0QJYiKhDNbE4DZ p3eg/BayLS2eM+LmW3FK1+OzpnRemxgcrGeSiCso= Received: from DLEE102.ent.ti.com (dlee102.ent.ti.com [157.170.170.32]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 04P2ooJ4113215 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Sun, 24 May 2020 21:50:50 -0500 Received: from DLEE105.ent.ti.com (157.170.170.35) by DLEE102.ent.ti.com (157.170.170.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Sun, 24 May 2020 21:50:50 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Sun, 24 May 2020 21:50:50 -0500 Received: from uda0271908.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 04P2onNm023969; Sun, 24 May 2020 21:50:49 -0500 From: Bin Liu To: Greg Kroah-Hartman CC: , Bin Liu Subject: [PATCH 4/6] usb: musb: mediatek: add reset FADDR to zero in reset interrupt handle Date: Sun, 24 May 2020 21:50:47 -0500 Message-ID: <20200525025049.3400-5-b-liu@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200525025049.3400-1-b-liu@ti.com> References: <20200525025049.3400-1-b-liu@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Macpaul Lin 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 --- drivers/usb/musb/mediatek.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/musb/mediatek.c b/drivers/usb/musb/mediatek.c index 6196b0e8d77d..eebeadd26946 100644 --- a/drivers/usb/musb/mediatek.c +++ b/drivers/usb/musb/mediatek.c @@ -208,6 +208,12 @@ static irqreturn_t generic_interrupt(int irq, void *__hci) 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);