From patchwork Thu May 12 18:31:09 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 9085621 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 01D6F9F372 for ; Thu, 12 May 2016 18:33:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2F7D02024C for ; Thu, 12 May 2016 18:33:20 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4E97920221 for ; Thu, 12 May 2016 18:33:19 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1b0vOf-0008R7-Fs; Thu, 12 May 2016 18:31:41 +0000 Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1b0vOc-0008MW-R5 for linux-arm-kernel@lists.infradead.org; Thu, 12 May 2016 18:31:39 +0000 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 60736627FE; Thu, 12 May 2016 18:31:22 +0000 (UTC) Received: from shalem.localdomain.com (vpn1-7-160.ams2.redhat.com [10.36.7.160]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u4CIVCvA029126; Thu, 12 May 2016 14:31:18 -0400 From: Hans de Goede To: Bin Liu , Greg Kroah-Hartman , Felipe Balbi Subject: [PATCH 2/2] musb: sunxi: Set state to A_WAIT_VRISE when enabling VBus Date: Thu, 12 May 2016 20:31:09 +0200 Message-Id: <1463077869-13224-2-git-send-email-hdegoede@redhat.com> In-Reply-To: <1463077869-13224-1-git-send-email-hdegoede@redhat.com> References: <1463077869-13224-1-git-send-email-hdegoede@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Thu, 12 May 2016 18:31:22 +0000 (UTC) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160512_113138_912391_5E73D6C7 X-CRM114-Status: GOOD ( 15.21 ) X-Spam-Score: -8.3 (--------) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-usb@vger.kernel.org, Chen-Yu Tsai , Kishon Vijay Abraham I , Hans de Goede , linux-sunxi@googlegroups.com, Maxime Ripard , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When the board is powering attached usb devices via the otg port sometimes / on some devices it takes slightly too long for the VBus detection code in phy-sun4i-usb.c to signal that VBus is high after enabling VBus and the musb hardware signals a MUSB_INTR_VBUSERROR interrupt. This commit sets the otg state to A_WAIT_VRISE upon enabling Vbus making musb_stage0_irq() ignore the first VBUSERR_RETRY_COUNT VBUSERROR interrupts, fixing connection issues in these cases. Signed-off-by: Hans de Goede --- drivers/usb/musb/sunxi.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c index 2c33d9b..2ee48fb 100644 --- a/drivers/usb/musb/sunxi.c +++ b/drivers/usb/musb/sunxi.c @@ -112,7 +112,7 @@ static void sunxi_musb_work(struct work_struct *work) if (test_bit(SUNXI_MUSB_FL_HOSTMODE, &glue->flags)) { set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); musb->xceiv->otg->default_a = 1; - musb->xceiv->otg->state = OTG_STATE_A_IDLE; + musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; MUSB_HST_MODE(musb); devctl |= MUSB_DEVCTL_SESSION; } else { @@ -145,9 +145,10 @@ static void sunxi_musb_set_vbus(struct musb *musb, int is_on) { struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent); - if (is_on) + if (is_on) { set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); - else + musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; + } else clear_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); schedule_work(&glue->work); @@ -325,6 +326,7 @@ static int sunxi_set_mode(struct musb *musb, u8 mode) set_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags); /* Stop musb work from turning vbus off again */ set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags); + musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; } return 0;