From patchwork Thu Mar 16 13:12:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roger Quadros X-Patchwork-Id: 70780 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:604a:0:0:0:0:0 with SMTP id j10csp478205wrt; Thu, 16 Mar 2023 06:20:20 -0700 (PDT) X-Google-Smtp-Source: AK7set/3q7ILacXFKUI6mTata1tmRomRtxt/r+xaU0Qr3ZDP7/JFwK6q8zRcBd3caQSg5yeirw05 X-Received: by 2002:a17:90b:33d1:b0:23d:bbcb:c97f with SMTP id lk17-20020a17090b33d100b0023dbbcbc97fmr4146808pjb.1.1678972820339; Thu, 16 Mar 2023 06:20:20 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1678972820; cv=none; d=google.com; s=arc-20160816; b=JcPkQlt6bV5bpe0T9cW5xP+U1vwu09kkEx4/WM1TIuVg8Arc8eyVI6V8xLWmujLmZN qbP5gY3h9lmOmXK3NDvZeVRxLropHUZPL8SeTXA4ARbulf8Jak/NXr8RTX7fbmlNYfmn wYgFv/0PgIkEbSNV1stU/hitSXT4HDaHDsIxrrvJDUfWXMf/k3lK1Mj6PCz8PjoFsmFt baGA1qxM4iN5XBfEZYZbXuIIh/3YTeHHpayzY9QccQ2sMJPIqXQR5DC6bcrC8HFY2FEE W3qvgm4haInXq5wnYqaEZ2qfwmsPaa24A1y8AnkFmM0jXwq19EsjxZuIPfEyMYKHmUZx 8mwg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=koy4ydadBWt3Jb+aycWI1IW/IvlslpYHi/jywWC3IXs=; b=H9jL0SAiT2ImMn07TB3KCQReR/ixo1kzofWW/vmdzsfvJYez5yRdSzwtGB9l5PlZ3l pYbZJuftiDHPQPBJYJ7+U7tNilCVPtTf051bg41Jb9wYNMmQoI04oR8GBM8+guLqE1qH xcKbIOu4YisW7bmLJXqpFFoozQPkq0m0WKmIc7/IIQmthQ+2rcPC6ukCvOCrHRUZX+5b 8jFQdhKOteFaqbj+/GhTXf8Pv9I26HtjkM6nEeGQKFSDGsA7VkHelgqBPUhLs4PLXE43 U+DWYiQEo+f6qMa2YA8HQh6FWSHjG6bJVqUXEksffs5oUw+d2FpofAeLkfFA5O0WmKyV AHVA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=jomVkmsc; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id t19-20020a17090a449300b0023414093852si4397031pjg.25.2023.03.16.06.20.06; Thu, 16 Mar 2023 06:20:20 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=jomVkmsc; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229932AbjCPNMm (ORCPT + 99 others); Thu, 16 Mar 2023 09:12:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229913AbjCPNMk (ORCPT ); Thu, 16 Mar 2023 09:12:40 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DC08DC8892; Thu, 16 Mar 2023 06:12:36 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 6E75762013; Thu, 16 Mar 2023 13:12:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 79822C4339E; Thu, 16 Mar 2023 13:12:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1678972355; bh=7E1F1HujeKXETEZ4kPVIQu6ehkDfj+ztaIBRYcJcu18=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jomVkmsc2gTsM46uTbphUsj1cw/S/gkHSKxZG1YC6g0ElVmzkoZNTUxyyEs6cIDsA mGoT2AGrMM6isbR9jU12g0dDwWosDKVU4aFd0ZgOHlhpO7woOrQcQKY4kFkDzyoxau ZBQmf84N37idtAV2Idui76kdC9iSOX1LobYzBgZyRII2Mz336k/S/zYDTurboxfc9x AGzX/kuzrPSURDXwlS3Jj1CB18hG4Eymg6l1RMjGhLRFkB2YE31Dq5506t0Kl4RLJ1 0k1+1NgAJJESQ6kD4cBvzJwAfLRClbpvf9TcU5wbhJIEpZeBZ3Jf5CIuzw46lMxeFx aIf8uDOnvcayg== From: Roger Quadros To: Thinh.Nguyen@synopsys.com Cc: gregkh@linuxfoundation.org, stern@rowland.harvard.edu, vigneshr@ti.com, srk@ti.com, r-gunasekaran@ti.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Aswath Govindraju , Roger Quadros Subject: [PATCH 1/3] usb: dwc3-am62: Add support for system wakeup based on USB events Date: Thu, 16 Mar 2023 15:12:24 +0200 Message-Id: <20230316131226.89540-2-rogerq@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230316131226.89540-1-rogerq@kernel.org> References: <20230316131226.89540-1-rogerq@kernel.org> MIME-Version: 1.0 X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1760530603753979585?= X-GMAIL-MSGID: =?utf-8?q?1760530603753979585?= From: Aswath Govindraju The USB2SS IP in TI's AM62 SoC is capable of supporting wakeup from deep sleep based on the following events, 1) VBUS state change 2) Overcurrent detection 3) Line state change Wakeup from these events can enabled by setting their corresponding bits in the WAKEUP_CONFIG register. The events to be enabled are decided based on the current role of the controller. When the role of the controller is host, the comparators for detecting VBUS state change are disabled while entering low power mode. This is done as VBUS state is not used in host mode and disabling the comparators helps in reducing the power consumption. So, wakeup from VBUS state change should be disabled in host mode. While operating in peripheral mode all the wakeup events can be enabled. Therefore, add support for the same in the suspend/resume hooks. Signed-off-by: Aswath Govindraju Signed-off-by: Roger Quadros --- drivers/usb/dwc3/dwc3-am62.c | 39 ++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c index 173cf3579c55..867bfa1252b8 100644 --- a/drivers/usb/dwc3/dwc3-am62.c +++ b/drivers/usb/dwc3/dwc3-am62.c @@ -17,6 +17,8 @@ #include #include +#include "core.h" + /* USB WRAPPER register offsets */ #define USBSS_PID 0x0 #define USBSS_OVERCURRENT_CTRL 0x4 @@ -45,6 +47,10 @@ #define USBSS_PHY_VBUS_SEL_SHIFT 1 #define USBSS_PHY_LANE_REVERSE BIT(0) +/* CORE STAT register bits */ +#define USBSS_CORE_OPERATIONAL_MODE_MASK GENMASK(13, 12) +#define USBSS_CORE_OPERATIONAL_MODE_SHIFT 12 + /* MODE CONTROL register bits */ #define USBSS_MODE_VALID BIT(0) @@ -233,6 +239,9 @@ static int dwc3_ti_probe(struct platform_device *pdev) reg |= USBSS_MODE_VALID; dwc3_ti_writel(data, USBSS_MODE_CONTROL, reg); + /* Device has capability to wakeup system from sleep */ + device_set_wakeup_capable(dev, true); + /* Setting up autosuspend */ pm_runtime_set_autosuspend_delay(dev, DWC3_AM62_AUTOSUSPEND_DELAY); pm_runtime_use_autosuspend(dev); @@ -281,6 +290,22 @@ static int dwc3_ti_remove(struct platform_device *pdev) static int dwc3_ti_suspend_common(struct device *dev) { struct dwc3_data *data = dev_get_drvdata(dev); + u32 reg, current_prtcap_dir; + + if (device_may_wakeup(dev)) { + reg = dwc3_ti_readl(data, USBSS_CORE_STAT); + current_prtcap_dir = (reg & USBSS_CORE_OPERATIONAL_MODE_MASK) + >> USBSS_CORE_OPERATIONAL_MODE_SHIFT; + /* Set wakeup config enable bits */ + reg = dwc3_ti_readl(data, USBSS_WAKEUP_CONFIG); + if (current_prtcap_dir == DWC3_GCTL_PRTCAP_HOST) { + reg |= USBSS_WAKEUP_CFG_LINESTATE_EN | USBSS_WAKEUP_CFG_OVERCURRENT_EN; + } else { + reg |= USBSS_WAKEUP_CFG_OVERCURRENT_EN | USBSS_WAKEUP_CFG_LINESTATE_EN | + USBSS_WAKEUP_CFG_VBUSVALID_EN; + } + dwc3_ti_writel(data, USBSS_WAKEUP_CONFIG, reg); + } clk_disable_unprepare(data->usb2_refclk); @@ -290,9 +315,23 @@ static int dwc3_ti_suspend_common(struct device *dev) static int dwc3_ti_resume_common(struct device *dev) { struct dwc3_data *data = dev_get_drvdata(dev); + u32 reg; clk_prepare_enable(data->usb2_refclk); + if (device_may_wakeup(dev)) { + /* Clear wakeup config enable bits */ + reg = dwc3_ti_readl(data, USBSS_WAKEUP_CONFIG); + reg &= ~(USBSS_WAKEUP_CFG_OVERCURRENT_EN | USBSS_WAKEUP_CFG_LINESTATE_EN | + USBSS_WAKEUP_CFG_VBUSVALID_EN); + dwc3_ti_writel(data, USBSS_WAKEUP_CONFIG, reg); + } + + reg = dwc3_ti_readl(data, USBSS_WAKEUP_STAT); + /* Clear the wakeup status with wakeup clear bit */ + reg |= USBSS_WAKEUP_STAT_CLR; + dwc3_ti_writel(data, USBSS_WAKEUP_STAT, reg); + return 0; }