From patchwork Tue Apr 5 14:05:16 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roger Quadros X-Patchwork-Id: 8752371 Return-Path: X-Original-To: patchwork-linux-omap@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 CDC919F3D1 for ; Tue, 5 Apr 2016 14:07:06 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D235D203B1 for ; Tue, 5 Apr 2016 14:07:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EA0B520379 for ; Tue, 5 Apr 2016 14:07:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933532AbcDEOGf (ORCPT ); Tue, 5 Apr 2016 10:06:35 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:49621 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933488AbcDEOGe (ORCPT ); Tue, 5 Apr 2016 10:06:34 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id u35E6C0Y014946; Tue, 5 Apr 2016 09:06:12 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id u35E6CBX022881; Tue, 5 Apr 2016 09:06:12 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.224.2; Tue, 5 Apr 2016 09:06:10 -0500 Received: from lta0400828d.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id u35E5NPE032137; Tue, 5 Apr 2016 09:06:08 -0500 From: Roger Quadros To: , , , CC: , , , , , , , , , , Roger Quadros Subject: [PATCH v6 11/12] usb: core: hub: Notify OTG fsm when A device sets b_hnp_enable Date: Tue, 5 Apr 2016 17:05:16 +0300 Message-ID: <1459865117-7032-12-git-send-email-rogerq@ti.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1459865117-7032-1-git-send-email-rogerq@ti.com> References: <1459865117-7032-1-git-send-email-rogerq@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 This is the a_set_b_hnp_enable flag in the OTG state machine diagram and must be set when the A-Host has successfully set the b_hnp_enable feature of the OTG-B-Peripheral attached to it. When this bit changes we kick our OTG FSM to make note of the change and act accordingly. Signed-off-by: Roger Quadros --- drivers/usb/core/hub.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 38cc4ba..27e3b4c 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2273,6 +2273,7 @@ static int usb_enumerate_device_otg(struct usb_device *udev) && udev->parent == udev->bus->root_hub) { struct usb_otg_descriptor *desc = NULL; struct usb_bus *bus = udev->bus; + struct usb_hcd *hcd = bus_to_hcd(bus); unsigned port1 = udev->portnum; /* descriptor may appear anywhere in config */ @@ -2302,6 +2303,9 @@ static int usb_enumerate_device_otg(struct usb_device *udev) dev_err(&udev->dev, "can't set HNP mode: %d\n", err); bus->b_hnp_enable = 0; + } else { + /* notify OTG fsm about a_set_b_hnp_enable */ + usb_otg_kick_fsm(hcd->otg_dev); } } else if (desc->bLength == sizeof (struct usb_otg_descriptor)) { @@ -2312,10 +2316,14 @@ static int usb_enumerate_device_otg(struct usb_device *udev) USB_DEVICE_A_ALT_HNP_SUPPORT, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); - if (err < 0) + if (err < 0) { dev_err(&udev->dev, "set a_alt_hnp_support failed: %d\n", err); + } else { + /* notify OTG fsm about a_set_b_hnp_enable */ + usb_otg_kick_fsm(hcd->otg_dev); + } } } #endif @@ -4355,8 +4363,13 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1, */ if (!hdev->parent) { delay = HUB_ROOT_RESET_TIME; - if (port1 == hdev->bus->otg_port) + if (port1 == hdev->bus->otg_port) { hdev->bus->b_hnp_enable = 0; +#ifdef CONFIG_USB_OTG + /* notify OTG fsm about a_set_b_hnp_enable change */ + usb_otg_kick_fsm(hcd->otg_dev); +#endif + } } /* Some low speed devices have problems with the quick delay, so */