From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 163E0ECE59F for ; Wed, 16 Oct 2019 03:34:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E016E2086A for ; Wed, 16 Oct 2019 03:34:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="u9L/pE1C" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391068AbfJPDeu (ORCPT ); Tue, 15 Oct 2019 23:34:50 -0400 Received: from mail-pf1-f193.google.com ([209.85.210.193]:37531 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403849AbfJPDdz (ORCPT ); Tue, 15 Oct 2019 23:33:55 -0400 Received: by mail-pf1-f193.google.com with SMTP id y5so13797836pfo.4 for ; Tue, 15 Oct 2019 20:33:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=2PoKh0+SG7fHxZLJh2y0Lp0GiZzbHmOzaEb4WWk+/NM=; b=u9L/pE1CJ4s0MCM+ENSOrn5WX8ACrKw+f7H+culvO6PxC99AEUEIDqUc/Od//7F4ux NGKoaw5O875g7vF+TdHz5jOtu/6ZqGT/u9eVpntdnCTT247RwTDWquw2hdvSCV+fBi1V m7ETBCC7pz06d+d+CYF7H/t97DpuXf3fs4XAntVl56c3A9yJOyJQ7AmCA1cdxAs/PqEq i9JwY1zgFvlchdZKDy82Wn/K4HljT0F70ysZwFzhzmhzYxoC2a7ppnxV/j3m3sWF+toz AaM2eMUwXZBux98pSL0V4XInnIoMgsw7qVjNKuwWmC2PUBfCABDddSm/pvOPJpHR+aZz VQEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=2PoKh0+SG7fHxZLJh2y0Lp0GiZzbHmOzaEb4WWk+/NM=; b=hEIkU4lBlEtwmJzmyeIm1vodSq0o9s4+qOthg4jcb9wcAnTEIkf/E+Evm5ETV+FU87 urpjFept6aa8e0geI3gzJc6Xs8j9LWTgsKyWS4ODKC6t0Dd64wyJfJ/jqrWAQSm9rPYo gJyly5iURk991rKy5S2u9ps1k5kHA+WYVGnU4XZexZVqoSyGtroyKq8mhdBVBcB5EpuB s2Ye6SqJyr9bmJlpjZXAYGsO8sdRHSMbp4cTBluHwDEsojFsGaeD3Gf4qlG28VNFk3IF wyuqoWim+rW02tJj9/HN9lT3O9B11QUSunMq3UipUX1n4s+NCYtL25sVwSH/XMTbGCNo A15w== X-Gm-Message-State: APjAAAUNWeKwMfdcWzNLy19HhPGn/88WkwBrBBn0CACQaOh/Y87FkJDT zV4FxMzbwP8oCfinWUdM9eWJqA== X-Google-Smtp-Source: APXvYqwm2S497WA37OpvJu48WtPFC2QRdjOTLBX6kJACVlFLFjKUX/3rNVLnjoD4Lp5ERBCkjIvLaQ== X-Received: by 2002:aa7:8e47:: with SMTP id d7mr11104425pfr.125.1571196834268; Tue, 15 Oct 2019 20:33:54 -0700 (PDT) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id l23sm748356pjy.12.2019.10.15.20.33.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Oct 2019 20:33:53 -0700 (PDT) From: John Stultz To: lkml Cc: Yu Chen , Greg Kroah-Hartman , Rob Herring , Mark Rutland , ShuFan Lee , Heikki Krogerus , Suzuki K Poulose , Chunfeng Yun , Felipe Balbi , Hans de Goede , Andy Shevchenko , Jun Li , Valentin Schneider , Jack Pham , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, John Stultz Subject: [RFC][PATCH v3 07/11] usb: dwc3: Registering a role switch in the DRD code. Date: Wed, 16 Oct 2019 03:33:36 +0000 Message-Id: <20191016033340.1288-8-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191016033340.1288-1-john.stultz@linaro.org> References: <20191016033340.1288-1-john.stultz@linaro.org> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Yu Chen The Type-C drivers use USB role switch API to inform the system about the negotiated data role, so registering a role switch in the DRD code in order to support platforms with USB Type-C connectors. Cc: Greg Kroah-Hartman Cc: Rob Herring Cc: Mark Rutland CC: ShuFan Lee Cc: Heikki Krogerus Cc: Suzuki K Poulose Cc: Chunfeng Yun Cc: Yu Chen Cc: Felipe Balbi Cc: Hans de Goede Cc: Andy Shevchenko Cc: Jun Li Cc: Valentin Schneider Cc: Jack Pham Cc: linux-usb@vger.kernel.org Cc: devicetree@vger.kernel.org Suggested-by: Heikki Krogerus Signed-off-by: Yu Chen Signed-off-by: John Stultz --- v2: Fix role_sw and role_switch_default_mode descriptions as reported by kbuild test robot v3: Split out the role-switch-default-host logic into its own patch --- drivers/usb/dwc3/Kconfig | 1 + drivers/usb/dwc3/core.h | 3 ++ drivers/usb/dwc3/drd.c | 66 +++++++++++++++++++++++++++++++++++++++- 3 files changed, 69 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index 89abc6078703..1104745c41a9 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -44,6 +44,7 @@ config USB_DWC3_DUAL_ROLE bool "Dual Role mode" depends on ((USB=y || USB=USB_DWC3) && (USB_GADGET=y || USB_GADGET=USB_DWC3)) depends on (EXTCON=y || EXTCON=USB_DWC3) + select USB_ROLE_SWITCH help This is the default mode of working of DWC3 controller where both host and gadget features are enabled. diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 1c8b349379af..6f19e9891767 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -951,6 +952,7 @@ struct dwc3_scratchpad_array { * @hsphy_mode: UTMI phy mode, one of following: * - USBPHY_INTERFACE_MODE_UTMI * - USBPHY_INTERFACE_MODE_UTMIW + * @role_sw: usb_role_switch handle * @usb2_phy: pointer to USB2 PHY * @usb3_phy: pointer to USB3 PHY * @usb2_generic_phy: pointer to USB2 PHY @@ -1084,6 +1086,7 @@ struct dwc3 { struct extcon_dev *edev; struct notifier_block edev_nb; enum usb_phy_interface hsphy_mode; + struct usb_role_switch *role_sw; u32 fladj; u32 irq_gadget; diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index c946d64142ad..61d4fd8aead4 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -476,6 +476,52 @@ static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) return edev; } +static int dwc3_usb_role_switch_set(struct device *dev, enum usb_role role) +{ + struct dwc3 *dwc = dev_get_drvdata(dev); + u32 mode; + + switch (role) { + case USB_ROLE_HOST: + mode = DWC3_GCTL_PRTCAP_HOST; + break; + case USB_ROLE_DEVICE: + mode = DWC3_GCTL_PRTCAP_DEVICE; + break; + default: + mode = DWC3_GCTL_PRTCAP_DEVICE; + break; + } + + dwc3_set_mode(dwc, mode); + return 0; +} + +static enum usb_role dwc3_usb_role_switch_get(struct device *dev) +{ + struct dwc3 *dwc = dev_get_drvdata(dev); + unsigned long flags; + enum usb_role role; + + spin_lock_irqsave(&dwc->lock, flags); + switch (dwc->current_dr_role) { + case DWC3_GCTL_PRTCAP_HOST: + role = USB_ROLE_HOST; + break; + case DWC3_GCTL_PRTCAP_DEVICE: + role = USB_ROLE_DEVICE; + break; + case DWC3_GCTL_PRTCAP_OTG: + role = dwc->current_otg_role; + break; + default: + role = USB_ROLE_DEVICE; + break; + } + spin_unlock_irqrestore(&dwc->lock, flags); + return role; +} + int dwc3_drd_init(struct dwc3 *dwc) { int ret, irq; @@ -484,7 +530,22 @@ int dwc3_drd_init(struct dwc3 *dwc) if (IS_ERR(dwc->edev)) return PTR_ERR(dwc->edev); - if (dwc->edev) { + if (device_property_read_bool(dwc->dev, "usb-role-switch")) { + struct usb_role_switch_desc dwc3_role_switch = {NULL}; + u32 mode; + + mode = DWC3_GCTL_PRTCAP_DEVICE; + + dwc3_role_switch.fwnode = dev_fwnode(dwc->dev); + dwc3_role_switch.set = dwc3_usb_role_switch_set; + dwc3_role_switch.get = dwc3_usb_role_switch_get; + dwc->role_sw = usb_role_switch_register(dwc->dev, + &dwc3_role_switch); + if (IS_ERR(dwc->role_sw)) + return PTR_ERR(dwc->role_sw); + + dwc3_set_mode(dwc, mode); + } else if (dwc->edev) { dwc->edev_nb.notifier_call = dwc3_drd_notifier; ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST, &dwc->edev_nb); @@ -531,6 +592,9 @@ void dwc3_drd_exit(struct dwc3 *dwc) { unsigned long flags; + if (dwc->role_sw) + usb_role_switch_unregister(dwc->role_sw); + if (dwc->edev) extcon_unregister_notifier(dwc->edev, EXTCON_USB_HOST, &dwc->edev_nb); -- 2.17.1