From patchwork Mon Aug 15 19:21:27 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: 9281983 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 1B8DC60467 for ; Mon, 15 Aug 2016 19:23:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0D9B928E5A for ; Mon, 15 Aug 2016 19:23:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 024C728E5C; Mon, 15 Aug 2016 19:23:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 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.wl.linuxfoundation.org (Postfix) with ESMTPS id ADDCB28E5A for ; Mon, 15 Aug 2016 19:23:53 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bZNT1-00081J-RW; Mon, 15 Aug 2016 19:22:35 +0000 Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bZNSW-0007qs-6F for linux-arm-kernel@lists.infradead.org; Mon, 15 Aug 2016 19:22:05 +0000 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (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 8D28FC04D28F; Mon, 15 Aug 2016 19:21:44 +0000 (UTC) Received: from shalem.localdomain.com (vpn1-4-16.ams2.redhat.com [10.36.4.16]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u7FJLYYt002825; Mon, 15 Aug 2016 15:21:41 -0400 From: Hans de Goede To: Bin Liu , Greg Kroah-Hartman , Kishon Vijay Abraham I , Rob Herring Subject: [PATCH v2 2/7] phy-sun4i-usb: Refactor forced session ending Date: Mon, 15 Aug 2016 21:21:27 +0200 Message-Id: <1471288892-21702-3-git-send-email-hdegoede@redhat.com> In-Reply-To: <1471288892-21702-1-git-send-email-hdegoede@redhat.com> References: <1471288892-21702-1-git-send-email-hdegoede@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Mon, 15 Aug 2016 19:21:44 +0000 (UTC) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160815_122204_380113_DE65106D X-CRM114-Status: GOOD ( 14.74 ) 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: Hans de Goede , Maxime Ripard , linux-usb@vger.kernel.org, Chen-Yu Tsai , 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-Virus-Scanned: ClamAV using ClamSMTP The phy-sun4i-usb code supports forced ending a session on systems which lack Vbus detection, to allow switching between host and peripheral mode on such systems. Role switching via the musb driver "mode" sysfs attribute requires force ending the session too. This commit refactors the code to allow other parts of the phy-sun4i-usb code to request a forced session end. Signed-off-by: Hans de Goede --- drivers/phy/phy-sun4i-usb.c | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c index 1cb84a8..02cb65e 100644 --- a/drivers/phy/phy-sun4i-usb.c +++ b/drivers/phy/phy-sun4i-usb.c @@ -133,6 +133,7 @@ struct sun4i_usb_phy_data { struct power_supply *vbus_power_supply; struct notifier_block vbus_power_nb; bool vbus_power_nb_registered; + bool force_session_end; int id_det_irq; int vbus_det_irq; int id_det; @@ -445,7 +446,7 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) struct sun4i_usb_phy_data *data = container_of(work, struct sun4i_usb_phy_data, detect.work); struct phy *phy0 = data->phys[0].phy; - bool id_notify = false, vbus_notify = false; + bool force_session_end, id_notify = false, vbus_notify = false; int id_det, vbus_det; if (phy0 == NULL) @@ -461,14 +462,17 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) return; } + force_session_end = data->force_session_end; + data->force_session_end = false; + if (id_det != data->id_det) { - /* - * When a host cable (id == 0) gets plugged in on systems - * without vbus detection report vbus low for long enough for - * the musb-ip to end the current device session. - */ + /* id-change, force session end if we've no vbus detection */ if (data->dr_mode == USB_DR_MODE_OTG && - !sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) { + !sun4i_usb_phy0_have_vbus_det(data)) + force_session_end = true; + + /* When entering host mode (id = 0) force end the session now */ + if (force_session_end && id_det == 0) { sun4i_usb_phy0_set_vbus_detect(phy0, 0); msleep(200); sun4i_usb_phy0_set_vbus_detect(phy0, 1); @@ -489,13 +493,8 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) if (id_notify) { extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST, !id_det); - /* - * When a host cable gets unplugged (id == 1) on systems - * without vbus detection report vbus low for long enough to - * the musb-ip to end the current host session. - */ - if (data->dr_mode == USB_DR_MODE_OTG && - !sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) { + /* When leaving host mode force end the session here */ + if (force_session_end && id_det == 1) { mutex_lock(&phy0->mutex); sun4i_usb_phy0_set_vbus_detect(phy0, 0); msleep(1000);