From patchwork Tue Jul 28 07:45:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 11688611 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 1C36813B1 for ; Tue, 28 Jul 2020 07:46:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0112C21D95 for ; Tue, 28 Jul 2020 07:46:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="jngU+4i7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728005AbgG1Hqk (ORCPT ); Tue, 28 Jul 2020 03:46:40 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:57144 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726933AbgG1Hqj (ORCPT ); Tue, 28 Jul 2020 03:46:39 -0400 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 06S7cKU9018522; Tue, 28 Jul 2020 09:46:22 +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=o17UNbxPJi74AdiW/0RqZLQ/kxpo/02/yQhPBM1sn7Y=; b=jngU+4i7hNvuReU4xD6DK0yCeCeVi3BWJH6xvig/UbfF0TilvMUFLDYFTG9EmmBPBUEH qeG0g5s8fGbQ+A7R9NX4pRmBnaIGhzZbhlDkKsrbE+716k8vw1whuFOW2goq5O/rtK95 dVLFFjXwqQKIIAsJbOfHwS0pxSHMtTyNd7mSKX6vUhRvNadoZQUme5TN8WCQtaWTTUOb YxPfw1J3h9s4tdiUB+hxgzf0GO5sP9MO5tdZeTQgYPzVhLapp8NZ0Osgrojuza4UAvaa vzFgMt3Uhs/kk5g3+dHDqAPc4P7eYClIaqTbuqdKRFEoxoFQD2FkoFpPRWZgF4a5Bqq4 NA== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 32ga71w1ce-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 28 Jul 2020 09:46:22 +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 75EF510002A; Tue, 28 Jul 2020 09:46:17 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 5CB2E21FE93; Tue, 28 Jul 2020 09:46:17 +0200 (CEST) Received: from localhost (10.75.127.44) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 28 Jul 2020 09:46:17 +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 v5 0/3] Add USB role switch support to DWC2 Date: Tue, 28 Jul 2020 09:45:59 +0200 Message-ID: <20200728074602.14218-1-amelie.delaunay@st.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG5NODE3.st.com (10.75.127.15) 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=2020-07-28_01:2020-07-27,2020-07-28 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): dt-bindings: usb: dwc2: add optional usb-role-switch property 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 --- Changes in v5: - Use device_property_read_bool instead of of_read_property_bool in params.c Changes in v4: - Simplify call to dwc2_force_mode in drd.c - Add error_drd label in probe error path in platform.c 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 | 180 ++++++++++++++++++ drivers/usb/dwc2/gadget.c | 2 +- drivers/usb/dwc2/params.c | 2 +- drivers/usb/dwc2/platform.c | 20 +- 8 files changed, 215 insertions(+), 5 deletions(-) create mode 100644 drivers/usb/dwc2/drd.c