From patchwork Fri Jul 24 10:47:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 11682947 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 4CBC2138A for ; Fri, 24 Jul 2020 10:47:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 346A82074A for ; Fri, 24 Jul 2020 10:47:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="OQbP1dk9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727786AbgGXKrj (ORCPT ); Fri, 24 Jul 2020 06:47:39 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:40650 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727057AbgGXKri (ORCPT ); Fri, 24 Jul 2020 06:47:38 -0400 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 06OAlMvI002109; Fri, 24 Jul 2020 12:47:22 +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=p9Yq1UIRht3FJka2ELyJEv6RiWxJVu9Woas+GfUzZYs=; b=OQbP1dk93DzXNT/7wCmzF4vPEJwt7sR+MAHn+bESQdNI2ojpzn2zEhkvtPBPWgaCHwed d0QhSs65RSL9mOMm6Qyi4626fe6x+XiMctd+HjY+kTBW3yhNuox0SQ9pyXko6DWAT61+ z/L1G8+yyYdRczj7EX86o4ZJLhnGMw/R5ES4nsiAXHFyUQf3RctMMUqMuxchtC2HzwaG fqznXhV+aX/ewh7cfCuK6DwFIgN3s6/KKm5NDB09bQQ7tV2o+qHBTXGP0xdcj4bHg+0a 39w7WFXNTjE/i5UUaQxAGR8qoT9Fm0O4B3tBbtVUVVUL9qFTuoH1pPCkoWW7aKMQDGev Xw== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 32bsahfwxp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 24 Jul 2020 12:47:22 +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 0421310002A; Fri, 24 Jul 2020 12:47:17 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id E2E292A4D71; Fri, 24 Jul 2020 12:47:16 +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; Fri, 24 Jul 2020 12:47:16 +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 v3 0/3] Add USB role switch support to DWC2 Date: Fri, 24 Jul 2020 12:47:08 +0200 Message-ID: <20200724104711.5474-1-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: SFHDAG6NODE2.st.com (10.75.127.17) 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=2020-07-24_03:2020-07-24,2020-07-24 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 v3: - Fix build issue reported by kernel test robot in drd.c 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 | 181 ++++++++++++++++++ drivers/usb/dwc2/gadget.c | 2 +- drivers/usb/dwc2/params.c | 4 +- drivers/usb/dwc2/platform.c | 15 ++ 8 files changed, 215 insertions(+), 3 deletions(-) create mode 100644 drivers/usb/dwc2/drd.c