From patchwork Tue Jun 16 14:07:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 11607633 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 0B17A618 for ; Tue, 16 Jun 2020 14:08:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E7C6C207D3 for ; Tue, 16 Jun 2020 14:08:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="LQlgpY2P" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728860AbgFPOHo (ORCPT ); Tue, 16 Jun 2020 10:07:44 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:59705 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728557AbgFPOHo (ORCPT ); Tue, 16 Jun 2020 10:07:44 -0400 Received: from pps.filterd (m0046037.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 05GE2wij002436; Tue, 16 Jun 2020 16:07:28 +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=5Hcd79p5ovxHgR2Kw+vJ8ycKacohfcjtHYW/V9jWRZU=; b=LQlgpY2PuUrJPpqbJ2bkNsqYx7LRUbCXYxr526KmqbAo6u6b+8mQreEakCrDmEQeFoKE Wl1DDz98V9dTNm7gWmOKwBQ0zn2aBcADVyfvinxmpVrL0xAQs4k2qxXsAu4/BzPMCzBt bFw6sZUCUUMKM8hP+kPh+W6Ypm4pW7pfZScttWpox8UDOBFhfuj0n3rDtuARZXq8P2ic C0UZgoIbFsLAriSPDz84DMrdg4BYhUrJbtAZC53k0M+AGiVOylMSaUoFI/sEE3sDHGcO 0L236C5TIVaxyMNqBos64ddV5zOcAa8/Fe/TW81sHv54yNIYSaZAg9LB4O1UjBAGm41p rA== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 31mmjvyrjv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 16 Jun 2020 16:07:28 +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 5F8DD10002A; Tue, 16 Jun 2020 16:07:27 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 48A582B56B6; Tue, 16 Jun 2020 16:07:27 +0200 (CEST) Received: from localhost (10.75.127.47) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 16 Jun 2020 16:07:26 +0200 From: Amelie Delaunay To: Minas Harutyunyan , Felipe Balbi , Greg Kroah-Hartman , Rob Herring , Maxime Coquelin , Alexandre Torgue CC: , , , , , Fabrice Gasnier , Amelie Delaunay Subject: [PATCH 0/3] Add USB role switch support to DWC2 Date: Tue, 16 Jun 2020 16:07:14 +0200 Message-ID: <20200616140717.28465-1-amelie.delaunay@st.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.75.127.47] X-ClientProxiedBy: SFHDAG7NODE3.st.com (10.75.127.21) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-16_04:2020-06-16,2020-06-16 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 usb: dwc2: don't use ID/Vbus detection if usb-role-switch on STM32MP15 SoCs ARM: dts: stm32: enable usb-role-switch on USB OTG on stm32mp15xx-dkx arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 2 +- drivers/usb/dwc2/Kconfig | 1 + drivers/usb/dwc2/Makefile | 2 +- drivers/usb/dwc2/core.h | 8 ++ drivers/usb/dwc2/drd.c | 190 +++++++++++++++++++++++++ drivers/usb/dwc2/gadget.c | 2 +- drivers/usb/dwc2/params.c | 4 +- drivers/usb/dwc2/platform.c | 13 ++ 8 files changed, 218 insertions(+), 4 deletions(-) create mode 100644 drivers/usb/dwc2/drd.c