From patchwork Mon Jan 20 16:31:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bryan O'Donoghue X-Patchwork-Id: 11342501 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 73EC0921 for ; Mon, 20 Jan 2020 16:31:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 495232253D for ; Mon, 20 Jan 2020 16:31:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="z0uYsHHL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729546AbgATQbE (ORCPT ); Mon, 20 Jan 2020 11:31:04 -0500 Received: from mail-wm1-f65.google.com ([209.85.128.65]:34622 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729505AbgATQbB (ORCPT ); Mon, 20 Jan 2020 11:31:01 -0500 Received: by mail-wm1-f65.google.com with SMTP id w5so261443wmi.1 for ; Mon, 20 Jan 2020 08:31:00 -0800 (PST) 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 :mime-version:content-transfer-encoding; bh=u9vQo2BUKvTZKBqgtVFhiO/j+kUrAdD+M3634Gyofhs=; b=z0uYsHHLVE2v+rAvK3OReN/HcP/5mKOL+pFewm7vlg5tucr60QJn87th4LxEKyeuxC idKs61jx07gZ2rSZ7zVETfsd5V/tpcyoSZnEkDMcmzFU6Vp/MogC5umnIFZ0DixCkH7x tsXfwidGq4BtVS0Aai6fCqpiFp24D8VD7CoytyWvHtNymgWNTAjYB3vLGGgfCWvhMDm4 C3HnQeYr6CsVmhDFN0FNK8DUjPIgV8zS4ytmiChOu7H5LxODQ13RGLwAxNq8RTgzkgup YHJHxGRw1gXjfF7e5femLn0y9RVbyLdLhSiTeRwPIdHrY+NTWAdIssra0D/FHntCK97D hUnQ== 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:mime-version:content-transfer-encoding; bh=u9vQo2BUKvTZKBqgtVFhiO/j+kUrAdD+M3634Gyofhs=; b=makXuyWjV1/+IP7TLYcetNYH8arcCu+u73BJurzh5io8YpiF4WmzK7sIkIwOEMMYVy isLl+9f9N3FYq7tjGiRVZaLag4HSw6Wp8kB26g5sDUGTn5oLLxeEpIMBBAZfyYWdVUDV ZXasR4y5iwp/51p9CEKdcDBPzsdD/kk8yr+gHrgwPTbBpx6u4bVrgBKT7vYW+v4WLlXn m2SnZMn/nAonkLqWvEWv8G4FcAyc6E9zfb2Jz+NM2Mncp15HIXL2FLtJ3QV5A6rXPd+C gUjsq29rAzv+4kK7AmHATr02SplHabW1B/u4e89FKqyYrjLdNLJDHd6zlm9/+++yllxj yIQQ== X-Gm-Message-State: APjAAAUEi5GJtcjEkw7HFEDrdvUOw/B4e8oeT1lf2l7aBZI4NIa9aCaF xFLAJt0dhXNjNS5c0vE2RhkYrw== X-Google-Smtp-Source: APXvYqymDxWjqHFvss62RyCFHk9zh+UjVruxBlFGL3TAXrshMYwpGBX2LENdrQHtY3IcMBl5LUrwxw== X-Received: by 2002:a1c:4857:: with SMTP id v84mr206241wma.8.1579537859619; Mon, 20 Jan 2020 08:30:59 -0800 (PST) Received: from localhost.localdomain ([176.61.57.127]) by smtp.gmail.com with ESMTPSA id p26sm22631756wmc.24.2020.01.20.08.30.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jan 2020 08:30:59 -0800 (PST) From: Bryan O'Donoghue To: linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, gregkh@linuxfoundation.org, jackp@codeaurora.org, balbi@kernel.org, bjorn.andersson@linaro.org Cc: linux-kernel@vger.kernel.org, John Stultz , Rob Herring , Mark Rutland , ShuFan Lee , Heikki Krogerus , Suzuki K Poulose , Chunfeng Yun , Yu Chen , Hans de Goede , Andy Shevchenko , Jun Li , Valentin Schneider , devicetree@vger.kernel.org, Bryan O'Donoghue Subject: [PATCH v2 10/19] usb: dwc3: Add support for role-switch-default-mode binding Date: Mon, 20 Jan 2020 16:31:07 +0000 Message-Id: <20200120163116.1197682-11-bryan.odonoghue@linaro.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200120163116.1197682-1-bryan.odonoghue@linaro.org> References: <20200120163116.1197682-1-bryan.odonoghue@linaro.org> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: John Stultz 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 Signed-off-by: Bryan O'Donoghue --- drivers/usb/dwc3/core.h | 3 +++ drivers/usb/dwc3/drd.c | 25 ++++++++++++++++++++++--- 2 files changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index a99e57636172..57d549a1ad0b 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -955,6 +955,8 @@ 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 @@ -1089,6 +1091,7 @@ 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 3b57d2ddda93..865341facece 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