From patchwork Fri Jul 24 10:47:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 11682943 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 6B9E8912 for ; Fri, 24 Jul 2020 10:47:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 47C9D20748 for ; Fri, 24 Jul 2020 10:47:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="XexPFwNV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727907AbgGXKrk (ORCPT ); Fri, 24 Jul 2020 06:47:40 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:31194 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726114AbgGXKrk (ORCPT ); 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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 85A0E2A4D7F; Fri, 24 Jul 2020 12:47:17 +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; Fri, 24 Jul 2020 12:47:17 +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 v3 1/3] usb: dwc2: override PHY input signals with usb role switch support Date: Fri, 24 Jul 2020 12:47:09 +0200 Message-ID: <20200724104711.5474-2-amelie.delaunay@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200724104711.5474-1-amelie.delaunay@st.com> References: <20200724104711.5474-1-amelie.delaunay@st.com> 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=2020-07-24_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 This patch adds support for usb role switch to dwc2, by using overriding control of the PHY voltage valid and ID input signals. iddig signal (ID) can be overridden: - when setting GUSBCFG_FORCEHOSTMODE, iddig input pin is overridden with 1; - when setting GUSBCFG_FORCEDEVMODE, iddig input pin is overridden with 0. avalid/bvalid/vbusvalid signals can be overridden respectively with: - GOTGCTL_AVALOEN + GOTGCTL_AVALOVAL - GOTGCTL_BVALOEN + GOTGCTL_BVALOVAL - GOTGCTL_VBVALEN + GOTGCTL_VBVALOVAL It is possible to determine valid sessions thanks to usb role switch: - if USB_ROLE_NONE then !avalid && !bvalid && !vbusvalid - if USB_ROLE_DEVICE then !avalid && bvalid && vbusvalid - if USB_ROLE_HOST then avalid && !bvalid && vbusvalid Cc: Martin Blumenstingl Signed-off-by: Amelie Delaunay --- Changes in v3: - Fix build issue reported by kernel test robot in drd.c Changes in v2: - Fix build issue reported by kernel test robot - Move call to dwc2_force_mode outside spinlock context - Add dwc2_drd_exit call in probe error path --- 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/platform.c | 15 +++ 6 files changed, 208 insertions(+), 2 deletions(-) create mode 100644 drivers/usb/dwc2/drd.c diff --git a/drivers/usb/dwc2/Kconfig b/drivers/usb/dwc2/Kconfig index 16e1aa304edc..dceb8f32414e 100644 --- a/drivers/usb/dwc2/Kconfig +++ b/drivers/usb/dwc2/Kconfig @@ -47,6 +47,7 @@ config USB_DWC2_PERIPHERAL config USB_DWC2_DUAL_ROLE bool "Dual Role mode" depends on (USB=y && USB_GADGET=y) || (USB_DWC2=m && USB && USB_GADGET) + select USB_ROLE_SWITCH help Select this option if you want the driver to work in a dual-role mode. In this mode both host and gadget features are enabled, and diff --git a/drivers/usb/dwc2/Makefile b/drivers/usb/dwc2/Makefile index 440320cc20a4..2bcd6945df46 100644 --- a/drivers/usb/dwc2/Makefile +++ b/drivers/usb/dwc2/Makefile @@ -3,7 +3,7 @@ ccflags-$(CONFIG_USB_DWC2_DEBUG) += -DDEBUG ccflags-$(CONFIG_USB_DWC2_VERBOSE) += -DVERBOSE_DEBUG obj-$(CONFIG_USB_DWC2) += dwc2.o -dwc2-y := core.o core_intr.o platform.o +dwc2-y := core.o core_intr.o platform.o drd.o dwc2-y += params.o ifneq ($(filter y,$(CONFIG_USB_DWC2_HOST) $(CONFIG_USB_DWC2_DUAL_ROLE)),) diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 132d687f1590..471564e120c8 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -860,6 +860,7 @@ struct dwc2_hregs_backup { * - USB_DR_MODE_PERIPHERAL * - USB_DR_MODE_HOST * - USB_DR_MODE_OTG + * @role_sw: usb_role_switch handle * @hcd_enabled: Host mode sub-driver initialization indicator. * @gadget_enabled: Peripheral mode sub-driver initialization indicator. * @ll_hw_enabled: Status of low-level hardware resources. @@ -1054,6 +1055,7 @@ struct dwc2_hsotg { struct dwc2_core_params params; enum usb_otg_state op_state; enum usb_dr_mode dr_mode; + struct usb_role_switch *role_sw; unsigned int hcd_enabled:1; unsigned int gadget_enabled:1; unsigned int ll_hw_enabled:1; @@ -1376,6 +1378,11 @@ static inline int dwc2_is_device_mode(struct dwc2_hsotg *hsotg) return (dwc2_readl(hsotg, GINTSTS) & GINTSTS_CURMODE_HOST) == 0; } +int dwc2_drd_init(struct dwc2_hsotg *hsotg); +void dwc2_drd_suspend(struct dwc2_hsotg *hsotg); +void dwc2_drd_resume(struct dwc2_hsotg *hsotg); +void dwc2_drd_exit(struct dwc2_hsotg *hsotg); + /* * Dump core registers and SPRAM */ @@ -1392,6 +1399,7 @@ int dwc2_hsotg_resume(struct dwc2_hsotg *dwc2); int dwc2_gadget_init(struct dwc2_hsotg *hsotg); void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2, bool reset); +void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg); void dwc2_hsotg_core_connect(struct dwc2_hsotg *hsotg); void dwc2_hsotg_disconnect(struct dwc2_hsotg *dwc2); int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode); @@ -1417,6 +1425,7 @@ static inline int dwc2_gadget_init(struct dwc2_hsotg *hsotg) { return 0; } static inline void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2, bool reset) {} +static inline void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg) {} static inline void dwc2_hsotg_core_connect(struct dwc2_hsotg *hsotg) {} static inline void dwc2_hsotg_disconnect(struct dwc2_hsotg *dwc2) {} static inline int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, diff --git a/drivers/usb/dwc2/drd.c b/drivers/usb/dwc2/drd.c new file mode 100644 index 000000000000..c00073e2c48b --- /dev/null +++ b/drivers/usb/dwc2/drd.c @@ -0,0 +1,181 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * drd.c - DesignWare USB2 DRD Controller Dual-role support + * + * Copyright (C) 2020 STMicroelectronics + * + * Author(s): Amelie Delaunay + */ + +#include +#include +#include +#include "core.h" + +static void dwc2_ovr_init(struct dwc2_hsotg *hsotg) +{ + unsigned long flags; + u32 gotgctl; + + spin_lock_irqsave(&hsotg->lock, flags); + + gotgctl = dwc2_readl(hsotg, GOTGCTL); + gotgctl |= GOTGCTL_BVALOEN | GOTGCTL_AVALOEN | GOTGCTL_VBVALOEN; + gotgctl |= GOTGCTL_DBNCE_FLTR_BYPASS; + gotgctl &= ~(GOTGCTL_BVALOVAL | GOTGCTL_AVALOVAL | GOTGCTL_VBVALOVAL); + dwc2_writel(hsotg, gotgctl, GOTGCTL); + + dwc2_force_mode(hsotg, false); + + spin_unlock_irqrestore(&hsotg->lock, flags); +} + +static int dwc2_ovr_avalid(struct dwc2_hsotg *hsotg, bool valid) +{ + u32 gotgctl = dwc2_readl(hsotg, GOTGCTL); + + /* Check if A-Session is already in the right state */ + if ((valid && (gotgctl & GOTGCTL_ASESVLD)) || + (!valid && !(gotgctl & GOTGCTL_ASESVLD))) + return -EALREADY; + + if (valid) + gotgctl |= GOTGCTL_AVALOVAL | GOTGCTL_VBVALOVAL; + else + gotgctl &= ~(GOTGCTL_AVALOVAL | GOTGCTL_VBVALOVAL); + dwc2_writel(hsotg, gotgctl, GOTGCTL); + + return 0; +} + +static int dwc2_ovr_bvalid(struct dwc2_hsotg *hsotg, bool valid) +{ + u32 gotgctl = dwc2_readl(hsotg, GOTGCTL); + + /* Check if B-Session is already in the right state */ + if ((valid && (gotgctl & GOTGCTL_BSESVLD)) || + (!valid && !(gotgctl & GOTGCTL_BSESVLD))) + return -EALREADY; + + if (valid) + gotgctl |= GOTGCTL_BVALOVAL | GOTGCTL_VBVALOVAL; + else + gotgctl &= ~(GOTGCTL_BVALOVAL | GOTGCTL_VBVALOVAL); + dwc2_writel(hsotg, gotgctl, GOTGCTL); + + return 0; +} + +static int dwc2_drd_role_sw_set(struct usb_role_switch *sw, enum usb_role role) +{ + struct dwc2_hsotg *hsotg = usb_role_switch_get_drvdata(sw); + unsigned long flags; + int already = 0; + + /* Skip session not in line with dr_mode */ + if ((role == USB_ROLE_DEVICE && hsotg->dr_mode == USB_DR_MODE_HOST) || + (role == USB_ROLE_HOST && hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)) + return -EINVAL; + +#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \ + IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE) + /* Skip session if core is in test mode */ + if (role == USB_ROLE_NONE && hsotg->test_mode) { + dev_dbg(hsotg->dev, "Core is in test mode\n"); + return -EBUSY; + } +#endif + + spin_lock_irqsave(&hsotg->lock, flags); + + if (role == USB_ROLE_HOST) { + already = dwc2_ovr_avalid(hsotg, true); + } else if (role == USB_ROLE_DEVICE) { + already = dwc2_ovr_bvalid(hsotg, true); + /* This clear DCTL.SFTDISCON bit */ + dwc2_hsotg_core_connect(hsotg); + } else { + if (dwc2_is_device_mode(hsotg)) { + if (!dwc2_ovr_bvalid(hsotg, false)) + /* This set DCTL.SFTDISCON bit */ + dwc2_hsotg_core_disconnect(hsotg); + } else { + dwc2_ovr_avalid(hsotg, false); + } + } + + spin_unlock_irqrestore(&hsotg->lock, flags); + + if (!already && + role != USB_ROLE_NONE && hsotg->dr_mode == USB_DR_MODE_OTG) + /* This will raise a Connector ID Status Change Interrupt */ + dwc2_force_mode(hsotg, role == USB_ROLE_HOST); + + dev_dbg(hsotg->dev, "%s-session valid\n", + role == USB_ROLE_NONE ? "No" : + role == USB_ROLE_HOST ? "A" : "B"); + + return 0; +} + +int dwc2_drd_init(struct dwc2_hsotg *hsotg) +{ + struct usb_role_switch_desc role_sw_desc = {0}; + struct usb_role_switch *role_sw; + int ret; + + if (!device_property_read_bool(hsotg->dev, "usb-role-switch")) + return 0; + + role_sw_desc.driver_data = hsotg; + role_sw_desc.fwnode = dev_fwnode(hsotg->dev); + role_sw_desc.set = dwc2_drd_role_sw_set; + role_sw_desc.allow_userspace_control = true; + + role_sw = usb_role_switch_register(hsotg->dev, &role_sw_desc); + if (IS_ERR(role_sw)) { + ret = PTR_ERR(role_sw); + dev_err(hsotg->dev, + "failed to register role switch: %d\n", ret); + return ret; + } + + hsotg->role_sw = role_sw; + + /* Enable override and initialize values */ + dwc2_ovr_init(hsotg); + + return 0; +} + +void dwc2_drd_suspend(struct dwc2_hsotg *hsotg) +{ + u32 gintsts, gintmsk; + + if (hsotg->role_sw && !hsotg->params.external_id_pin_ctl) { + gintmsk = dwc2_readl(hsotg, GINTMSK); + gintmsk &= ~GINTSTS_CONIDSTSCHNG; + dwc2_writel(hsotg, gintmsk, GINTMSK); + gintsts = dwc2_readl(hsotg, GINTSTS); + dwc2_writel(hsotg, gintsts | GINTSTS_CONIDSTSCHNG, GINTSTS); + } +} + +void dwc2_drd_resume(struct dwc2_hsotg *hsotg) +{ + u32 gintsts, gintmsk; + + if (hsotg->role_sw && !hsotg->params.external_id_pin_ctl) { + gintsts = dwc2_readl(hsotg, GINTSTS); + dwc2_writel(hsotg, gintsts | GINTSTS_CONIDSTSCHNG, GINTSTS); + gintmsk = dwc2_readl(hsotg, GINTMSK); + gintmsk |= GINTSTS_CONIDSTSCHNG; + dwc2_writel(hsotg, gintmsk, GINTMSK); + } +} + +void dwc2_drd_exit(struct dwc2_hsotg *hsotg) +{ + if (hsotg->role_sw) + usb_role_switch_unregister(hsotg->role_sw); +} diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 7faf5f8c056d..f069530110d9 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3532,7 +3532,7 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg, dwc2_readl(hsotg, DOEPCTL0)); } -static void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg) +void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg) { /* set the soft-disconnect bit */ dwc2_set_bit(hsotg, DCTL, DCTL_SFTDISCON); diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c index c347d93eae64..1a5c196b8c8e 100644 --- a/drivers/usb/dwc2/platform.c +++ b/drivers/usb/dwc2/platform.c @@ -317,6 +317,8 @@ static int dwc2_driver_remove(struct platform_device *dev) if (hsotg->params.activate_stm_id_vb_detection) regulator_disable(hsotg->usb33d); + dwc2_drd_exit(hsotg); + if (hsotg->ll_hw_enabled) dwc2_lowlevel_hw_disable(hsotg); @@ -532,6 +534,13 @@ static int dwc2_driver_probe(struct platform_device *dev) dwc2_writel(hsotg, ggpio, GGPIO); } + retval = dwc2_drd_init(hsotg); + if (retval) { + if (retval != -EPROBE_DEFER) + dev_err(hsotg->dev, "failed to initialize dual-role\n"); + goto error_init; + } + if (hsotg->dr_mode != USB_DR_MODE_HOST) { retval = dwc2_gadget_init(hsotg); if (retval) @@ -589,6 +598,8 @@ static int dwc2_driver_probe(struct platform_device *dev) return 0; error_init: + dwc2_drd_exit(hsotg); + if (hsotg->params.activate_stm_id_vb_detection) regulator_disable(hsotg->usb33d); error: @@ -605,6 +616,8 @@ static int __maybe_unused dwc2_suspend(struct device *dev) if (is_device_mode) dwc2_hsotg_suspend(dwc2); + dwc2_drd_suspend(dwc2); + if (dwc2->params.activate_stm_id_vb_detection) { unsigned long flags; u32 ggpio, gotgctl; @@ -685,6 +698,8 @@ static int __maybe_unused dwc2_resume(struct device *dev) /* Need to restore FORCEDEVMODE/FORCEHOSTMODE */ dwc2_force_dr_mode(dwc2); + dwc2_drd_resume(dwc2); + if (dwc2_is_device_mode(dwc2)) ret = dwc2_hsotg_resume(dwc2); From patchwork Fri Jul 24 10:47:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 11682949 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 E7547912 for ; Fri, 24 Jul 2020 10:47:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CEFED2074F for ; 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Fri, 24 Jul 2020 12:47:19 +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 99576100034; Fri, 24 Jul 2020 12:47:18 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 8B6802A4D71; Fri, 24 Jul 2020 12:47:18 +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; Fri, 24 Jul 2020 12:47:18 +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 2/3] dt-bindings: usb: dwc2: add optional usb-role-switch property Date: Fri, 24 Jul 2020 12:47:10 +0200 Message-ID: <20200724104711.5474-3-amelie.delaunay@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200724104711.5474-1-amelie.delaunay@st.com> References: <20200724104711.5474-1-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.45] 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=2020-07-24_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 This patch documents the usb-role-switch property in dwc2 bindings, now that usb-role-switch support is available in dwc2 driver. Cc: Martin Blumenstingl Signed-off-by: Amelie Delaunay --- New since v2 patchset. --- Documentation/devicetree/bindings/usb/dwc2.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/dwc2.yaml b/Documentation/devicetree/bindings/usb/dwc2.yaml index 9352a8ef60a6..7b226eeffe82 100644 --- a/Documentation/devicetree/bindings/usb/dwc2.yaml +++ b/Documentation/devicetree/bindings/usb/dwc2.yaml @@ -100,6 +100,10 @@ properties: dr_mode: enum: [host, peripheral, otg] + usb-role-switch: + $ref: /schemas/types.yaml#/definitions/flag + description: Support role switch. + g-rx-fifo-size: $ref: /schemas/types.yaml#/definitions/uint32 description: size of rx fifo size in gadget mode. From patchwork Fri Jul 24 10:47:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 11682945 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 5C328912 for ; Fri, 24 Jul 2020 10:47:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 41F712078D for ; Fri, 24 Jul 2020 10:47:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="KKdn0dLV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727811AbgGXKrj (ORCPT ); Fri, 24 Jul 2020 06:47:39 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:17980 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726593AbgGXKri (ORCPT ); Fri, 24 Jul 2020 06:47:38 -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 06OAgavr024674; Fri, 24 Jul 2020 12:47:20 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=1bzNsgZLWZKVjiN0fGrPqwteXNLs7cnoDEY/2HdJyoY=; b=KKdn0dLVI4aIyyXFDAE66pOEkOu+Hc2JItkE1EVVDMYO8Z0SCV1GEjGG+IPB8gluthOB YUuXtZxoKsZW3cCLxmYU2Z0GJE+CU9kwYHFHYrdTJ0UN1+FQYJ/OBtYIvffPv4+RBSON +TWw4bcqsmakPoCVvh8f2OzKeSDElbXV2Wf1z8LUU/StKBzWXN+YIdlx1ez2geYDZxiQ Od6S7VOh5RSfxRkYpY6NCFqyeZ1aus3+KejhpG/o7lAwk5PLXcKro0R1Hc0cSUqfjY9q dW+8HBmrwvTFx5Iz9VRwDzTtP+NvhYHgSxIKkR5/vjrGC0rNASvuuRDnEqNkmDaScg5V 2g== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 32cux0tasd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 24 Jul 2020 12:47:20 +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 E7A62100034; Fri, 24 Jul 2020 12:47:19 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id DA4662AE6C6; Fri, 24 Jul 2020 12:47:19 +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 12:47:19 +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 3/3] usb: dwc2: don't use ID/Vbus detection if usb-role-switch on STM32MP15 SoCs Date: Fri, 24 Jul 2020 12:47:11 +0200 Message-ID: <20200724104711.5474-4-amelie.delaunay@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200724104711.5474-1-amelie.delaunay@st.com> References: <20200724104711.5474-1-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.47] X-ClientProxiedBy: SFHDAG8NODE2.st.com (10.75.127.23) 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 If usb-role-switch is present in the device tree, it means that ID and Vbus signals are not connected to the OTG controller but to an external component (GPIOs, Type-C controller). In this configuration, usb role switch is used to force valid sessions on STM32MP15 SoCs. Acked-by: Minas Harutyunyan Signed-off-by: Amelie Delaunay --- No changes in v3. --- drivers/usb/dwc2/params.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index ce736d67c7c3..d6690ee7af01 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -183,9 +183,11 @@ static void dwc2_set_stm32mp15_fsotg_params(struct dwc2_hsotg *hsotg) static void dwc2_set_stm32mp15_hsotg_params(struct dwc2_hsotg *hsotg) { struct dwc2_core_params *p = &hsotg->params; + struct device_node *np = hsotg->dev->of_node; p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE; - p->activate_stm_id_vb_detection = true; + p->activate_stm_id_vb_detection = + !of_property_read_bool(np, "usb-role-switch"); p->host_rx_fifo_size = 440; p->host_nperio_tx_fifo_size = 256; p->host_perio_tx_fifo_size = 256;