From patchwork Thu Jul 23 11:07:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 11680623 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 E4493913 for ; Thu, 23 Jul 2020 11:08:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CD15822B47 for ; Thu, 23 Jul 2020 11:08:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="zgcA6GOv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728430AbgGWLHx (ORCPT ); Thu, 23 Jul 2020 07:07:53 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:20522 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728282AbgGWLHw (ORCPT ); Thu, 23 Jul 2020 07:07:52 -0400 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 06NAwU4c027391; Thu, 23 Jul 2020 13:07:33 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=STMicroelectronics; bh=B8FNCHpPJo15iadwOE6rPE190prlO9w4wXVteCya9nk=; b=zgcA6GOvFc1l5ZCgd+ZOaIrP7vM4hl4947z/fAoiy1UXl1WazB+YJ58SQUFtzoXy/x+J AQ4pglkbv/Lnk2yJ7mPuxGEUMztOpfqeBcKJHznpRBukRzfocSn+MzlAdfdmHUeKHtvS G3xRRYN1CQiD+GQPaQtGwFogug8dYvdWFYadAfOoEp6Ez0uNQOWCokx5aE+35VLKFp+4 jECBzQGEovPwANETvNSXHfTUrlatDzT4qxQ+3ecTSCkyMcvGcL5woZbyVnMHFs1eT/8V VC3oA+rvKx+dkhScP1SoNREVFzMgE04bH4KpSltcRY0G8wRnJs2ZzRdqeOBJepZNi5RM ew== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 32cux0mrg2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 23 Jul 2020 13:07:33 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 75709100034; Thu, 23 Jul 2020 13:07:32 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 606EB2AD9F6; Thu, 23 Jul 2020 13:07:32 +0200 (CEST) Received: from localhost (10.75.127.45) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 23 Jul 2020 13:07:32 +0200 From: Amelie Delaunay To: Minas Harutyunyan , Felipe Balbi , Greg Kroah-Hartman , Rob Herring , Maxime Coquelin , Alexandre Torgue CC: , , , , , Fabrice Gasnier , Amelie Delaunay , Martin Blumenstingl Subject: [PATCH v2 0/3] Add USB role switch support to DWC2 Date: Thu, 23 Jul 2020 13:07:14 +0200 Message-ID: <20200723110717.18699-1-amelie.delaunay@st.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.75.127.45] X-ClientProxiedBy: SFHDAG1NODE1.st.com (10.75.127.1) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-07-23_03:2020-07-23,2020-07-23 signatures=0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org When using usb-c connector (but it can also be the case with a micro-b connector), iddig, avalid, bvalid, vbusvalid input signals may not be connected to the DWC2 OTG controller. DWC2 OTG controller features an overriding control of the PHY voltage valid and ID input signals. So, missing signals can be forced using usb role from usb role switch and this override feature. This series adds support for usb role switch to dwc2, by using overriding control of the PHY voltage valid and ID input signals. It has been tested on stm32mp157c-dk2 [1], which has a Type-C connector managed by a Type-C port controller, and connected to USB OTG controller. [1] https://www.st.com/en/evaluation-tools/stm32mp157c-dk2.html Amelie Delaunay (3): usb: dwc2: override PHY input signals with usb role switch support dt-bindings: usb: dwc2: add optional usb-role-switch property usb: dwc2: don't use ID/Vbus detection if usb-role-switch on STM32MP15 SoCs --- Changes in v2: - Previous DT patch already in stm32-next branch so removed from v2 patchset "ARM: dts: stm32: enable usb-role-switch on USB OTG on stm32mp15xx-dkx" - DWC2 DT bindings update added - Build issue reported by kernel test robot fixed - Martin's comments taken into account --- .../devicetree/bindings/usb/dwc2.yaml | 4 + drivers/usb/dwc2/Kconfig | 1 + drivers/usb/dwc2/Makefile | 2 +- drivers/usb/dwc2/core.h | 9 + drivers/usb/dwc2/drd.c | 183 ++++++++++++++++++ drivers/usb/dwc2/gadget.c | 2 +- drivers/usb/dwc2/params.c | 4 +- drivers/usb/dwc2/platform.c | 15 ++ 8 files changed, 217 insertions(+), 3 deletions(-) create mode 100644 drivers/usb/dwc2/drd.c