From patchwork Fri Nov 8 01:17:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 178840 Delivered-To: patches@linaro.org Received: by 2002:a92:38d5:0:0:0:0:0 with SMTP id g82csp1924229ilf; Thu, 7 Nov 2019 17:17:29 -0800 (PST) X-Received: by 2002:a63:eb08:: with SMTP id t8mr8637958pgh.49.1573175848825; Thu, 07 Nov 2019 17:17:28 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1573175848; cv=none; d=google.com; s=arc-20160816; b=cdG6WGx1xZbY8FrerqO1sHzlnKLEA6L9J+8sUcAsOVlPxfR1CgrO3nbpu2OC7bv35K +t79b2FUSkGGmccFPxs7H37tUHylQy+wYBZjHmUM9Pc7jSKLHM+ydG9SJhHXjdkaR3TK bTJDsraKCzZPHWN8hN/nIJFFpHB1EZb/F1zdyf18QkTFucSGCiuJokdwkLLN7lJbEwcE hD/9anu6nN5qPHA+m5/3vgw/C16KT/nn31wI58XgprTxQd3UOnA0g7Ff7UaNvDHLMVOB uLIl9HhvIKf3CX8iAo1FGImTWDKPJUloEu/u0RIzb7kfuxPuwcnYssjDIke5D/uFX8Gk 5+NA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=OkKRy5y8eyF3IUkqSp9qwVY1typargMwIHR68X5ogBg=; b=Gkmd4dF+0lnSL+I9Y8Ar70MP4Hry4HPKAz08uEhalY7cLbt4p2mW2Y6fZ24RFCg3Pb JbWbRoXKPKEEZ/3gTh3Z+uiS55Y84LH1aYSP9vVC95eWuI8FJy+xwXwIe+Lem8F1Cx0n LCvjTyz8XYXAPcMWdf/FHJmaghd3fN9MMlpHitylrmRyK6vZw3IzT0Wi4qCtktLrpzj7 hIrLLcidyqzgV/cTYLNtGSTqdFS/h7upj9+8SonEc8BchPVCy8L2MCOYUCUiy4oMBeig EqqjdcWO2NwsUTkBSQ5V34RmBRwgYRkw5kby0Bq729p0mJzqO54H2eXzJILOVk9RA7zX 4qfg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=bKADj403; spf=pass (google.com: domain of john.stultz@linaro.org designates 209.85.220.65 as permitted sender) smtp.mailfrom=john.stultz@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. 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[67.170.172.113]) by smtp.gmail.com with ESMTPSA id s23sm3801627pgh.21.2019.11.07.17.17.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Nov 2019 17:17:27 -0800 (PST) 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: [PATCH v5 1/3] usb: dwc3: Registering a role switch in the DRD code. Date: Fri, 8 Nov 2019 01:17:21 +0000 Message-Id: <20191108011723.32390-2-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191108011723.32390-1-john.stultz@linaro.org> References: <20191108011723.32390-1-john.stultz@linaro.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 v5: Drop selecting CONFIG_USB_ROLE_SWITCH & ifdef dependent code --- drivers/usb/dwc3/core.h | 3 ++ drivers/usb/dwc3/drd.c | 77 ++++++++++++++++++++++++++++++++++++++++- 2 files changed, 79 insertions(+), 1 deletion(-) -- 2.17.1 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..cd43dc2a96c6 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -476,6 +476,73 @@ static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) return edev; } +#ifdef CONFIG_USB_ROLE_SWITCH +#define ROLE_SWITCH 1 +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; +} + +static int dwc3_setup_role_switch(struct dwc3 *dwc) +{ + struct usb_role_switch_desc dwc3_role_switch = {NULL}; + + 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, DWC3_GCTL_PRTCAP_DEVICE); + return 0; +} +#else +#define ROLE_SWITCH 0 +#define dwc3_setup_role_switch(x) +#endif + int dwc3_drd_init(struct dwc3 *dwc) { int ret, irq; @@ -484,7 +551,12 @@ int dwc3_drd_init(struct dwc3 *dwc) if (IS_ERR(dwc->edev)) return PTR_ERR(dwc->edev); - if (dwc->edev) { + if (ROLE_SWITCH && + device_property_read_bool(dwc->dev, "usb-role-switch")) { + ret = dwc3_setup_role_switch(dwc); + if (ret < 0) + return ret; + } 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 +603,9 @@ 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); From patchwork Fri Nov 8 01:17:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 178841 Delivered-To: patches@linaro.org Received: by 2002:a92:38d5:0:0:0:0:0 with SMTP id g82csp1924260ilf; Thu, 7 Nov 2019 17:17:30 -0800 (PST) X-Received: by 2002:a17:902:b693:: with SMTP id c19mr7295945pls.89.1573175850029; Thu, 07 Nov 2019 17:17:30 -0800 (PST) ARC-Seal: i=1; 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[67.170.172.113]) by smtp.gmail.com with ESMTPSA id s23sm3801627pgh.21.2019.11.07.17.17.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Nov 2019 17:17:28 -0800 (PST) From: John Stultz To: lkml Cc: John Stultz , Greg Kroah-Hartman , Rob Herring , Mark Rutland , ShuFan Lee , Heikki Krogerus , Suzuki K Poulose , Chunfeng Yun , Yu Chen , Felipe Balbi , Hans de Goede , Andy Shevchenko , Jun Li , Valentin Schneider , Jack Pham , linux-usb@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v5 2/3] dt-bindings: usb: generic: Add role-switch-default-mode binding Date: Fri, 8 Nov 2019 01:17:22 +0000 Message-Id: <20191108011723.32390-3-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191108011723.32390-1-john.stultz@linaro.org> References: <20191108011723.32390-1-john.stultz@linaro.org> Add binding to configure the default role the controller assumes is host mode when the usb role is USB_ROLE_NONE. 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 Signed-off-by: John Stultz --- v5: Switch to string rather then a bool --- Documentation/devicetree/bindings/usb/generic.txt | 6 ++++++ 1 file changed, 6 insertions(+) -- 2.17.1 Reviewed-by: Rob Herring diff --git a/Documentation/devicetree/bindings/usb/generic.txt b/Documentation/devicetree/bindings/usb/generic.txt index cf5a1ad456e6..dd733fa81fad 100644 --- a/Documentation/devicetree/bindings/usb/generic.txt +++ b/Documentation/devicetree/bindings/usb/generic.txt @@ -34,6 +34,12 @@ Optional properties: the USB data role (USB host or USB device) for a given USB connector, such as Type-C, Type-B(micro). see connector/usb-connector.txt. + - role-switch-default-mode: indicating if usb-role-switch is enabled, the + device default operation mode of controller while usb + role is USB_ROLE_NONE. Valid arguments are "host" and + "peripheral". Defaults to "peripheral" if not + specified. + This is an attribute to a USB controller such as: From patchwork Fri Nov 8 01:17:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 178842 Delivered-To: patches@linaro.org Received: by 2002:a92:38d5:0:0:0:0:0 with SMTP id g82csp1924280ilf; Thu, 7 Nov 2019 17:17:31 -0800 (PST) X-Received: by 2002:a63:252:: with SMTP id 79mr8357159pgc.434.1573175851164; Thu, 07 Nov 2019 17:17:31 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1573175851; cv=none; d=google.com; s=arc-20160816; b=rYVNUUOY+vI28CfmGHubAgeFhSZ9ETlWY/fUJKaZrs0g0ZqjSqiBoCfhA/rbsE6RI2 nPLqK58XNeAQgZUMvh1kwcm0b12jKtyubqwdJZSWSXFltBV1N2x0u4CrYt70dL4k8vy4 oBm9REPCwr+ut65N96M921T8YSGIZKDDBIcRtIEmds0GPoKtoyrjVdn2ZbD573pzPiL1 IvLIEcPq3Yt8oVj/AUm8aOJrbx6r9ic7dGB/NaafvPhGVohFb70JByy6YQ7sqe2VPiir KRpexXg8IzjmFpmTOzPwm+QvsHPZAos42P0flaaX+3CpR6RvVJYcKxeGdZvZHP+4cDsK /11A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=YbemW7AL+I9zYGvxXlbJg+1m1dDalQtynuOAJrGAmWs=; b=BeERKcXTlxZN+n698Gu0LC6XCmlA1DzbhqbfoXhC8CrGHRRIZBhjedUGl6LPMXVQ4W KH5pEUXlbw9/fL8G0ie872oLoljNxo9NX2MIljsV1Cdinzg552c8/8Z1Q09Pk/k+x9Il JZjePsY98K2JMQdG8ofteKK00C+fCVIH2LCpuLZlOu9JcUT8RbJiUnbIAKjkTmO+4EVh gdB4Q/V5DN4jo1Y0Uxl/ls5lGGFm2ok9hiTuvQY83fMO9SHpKO5lXAtM1SnGLJhzmuSV oqlXQawMnRmz8taXrwKFyWACZtcB6tC2V1QK6bUAf/4R4bZ+4jmoxFVuSpqLxEssMwXb /dzw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=ACJVwJRk; spf=pass (google.com: domain of john.stultz@linaro.org designates 209.85.220.65 as permitted sender) smtp.mailfrom=john.stultz@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. 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[67.170.172.113]) by smtp.gmail.com with ESMTPSA id s23sm3801627pgh.21.2019.11.07.17.17.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Nov 2019 17:17:30 -0800 (PST) From: John Stultz To: lkml Cc: John Stultz , Greg Kroah-Hartman , Rob Herring , Mark Rutland , ShuFan Lee , Heikki Krogerus , Suzuki K Poulose , Chunfeng Yun , Yu Chen , Felipe Balbi , Hans de Goede , Andy Shevchenko , Jun Li , Valentin Schneider , Jack Pham , linux-usb@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v5 3/3] usb: dwc3: Add support for role-switch-default-mode binding Date: Fri, 8 Nov 2019 01:17:23 +0000 Message-Id: <20191108011723.32390-4-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191108011723.32390-1-john.stultz@linaro.org> References: <20191108011723.32390-1-john.stultz@linaro.org> Support the new role-switch-default-mode binding for configuring the default role the controller assumes as when the usb role is USB_ROLE_NONE This patch was split out from a larger patch originally by Yu Chen 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 Signed-off-by: John Stultz --- v3: Split this patch out from addition of usb-role-switch handling v5: Reworked to use string based role-switch-default-mode --- drivers/usb/dwc3/core.h | 3 +++ drivers/usb/dwc3/drd.c | 25 ++++++++++++++++++++++--- 2 files changed, 25 insertions(+), 3 deletions(-) -- 2.17.1 diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 6f19e9891767..3c879c9ab1aa 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -953,6 +953,8 @@ struct dwc3_scratchpad_array { * - USBPHY_INTERFACE_MODE_UTMI * - USBPHY_INTERFACE_MODE_UTMIW * @role_sw: usb_role_switch handle + * @role_switch_default_mode: default operation mode of controller while + * usb role is USB_ROLE_NONE. * @usb2_phy: pointer to USB2 PHY * @usb3_phy: pointer to USB3 PHY * @usb2_generic_phy: pointer to USB2 PHY @@ -1087,6 +1089,7 @@ struct dwc3 { struct notifier_block edev_nb; enum usb_phy_interface hsphy_mode; struct usb_role_switch *role_sw; + enum usb_dr_mode role_switch_default_mode; u32 fladj; u32 irq_gadget; diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index cd43dc2a96c6..dbb881863297 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -491,7 +491,10 @@ static int dwc3_usb_role_switch_set(struct device *dev, enum usb_role role) mode = DWC3_GCTL_PRTCAP_DEVICE; break; default: - mode = DWC3_GCTL_PRTCAP_DEVICE; + if (dwc->role_switch_default_mode == USB_DR_MODE_HOST) + mode = DWC3_GCTL_PRTCAP_HOST; + else + mode = DWC3_GCTL_PRTCAP_DEVICE; break; } @@ -517,7 +520,10 @@ static enum usb_role dwc3_usb_role_switch_get(struct device *dev) role = dwc->current_otg_role; break; default: - role = USB_ROLE_DEVICE; + if (dwc->role_switch_default_mode == USB_DR_MODE_HOST) + role = USB_ROLE_HOST; + else + role = USB_ROLE_DEVICE; break; } spin_unlock_irqrestore(&dwc->lock, flags); @@ -527,6 +533,19 @@ static enum usb_role dwc3_usb_role_switch_get(struct device *dev) static int dwc3_setup_role_switch(struct dwc3 *dwc) { struct usb_role_switch_desc dwc3_role_switch = {NULL}; + const char *str; + u32 mode; + int ret; + + ret = device_property_read_string(dwc->dev, "role-switch-default-mode", + &str); + if (ret >= 0 && !strncmp(str, "host", strlen("host"))) { + dwc->role_switch_default_mode = USB_DR_MODE_HOST; + mode = DWC3_GCTL_PRTCAP_HOST; + } else { + dwc->role_switch_default_mode = USB_DR_MODE_PERIPHERAL; + mode = DWC3_GCTL_PRTCAP_DEVICE; + } dwc3_role_switch.fwnode = dev_fwnode(dwc->dev); dwc3_role_switch.set = dwc3_usb_role_switch_set; @@ -535,7 +554,7 @@ static int dwc3_setup_role_switch(struct dwc3 *dwc) if (IS_ERR(dwc->role_sw)) return PTR_ERR(dwc->role_sw); - dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); + dwc3_set_mode(dwc, mode); return 0; } #else