From patchwork Thu Mar 25 16:40:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Reding X-Patchwork-Id: 409246 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, 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 532C9C433E5 for ; Thu, 25 Mar 2021 16:41:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1E71361A1E for ; Thu, 25 Mar 2021 16:41:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229764AbhCYQlY (ORCPT ); Thu, 25 Mar 2021 12:41:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51998 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229662AbhCYQlF (ORCPT ); Thu, 25 Mar 2021 12:41:05 -0400 Received: from mail-wr1-x436.google.com (mail-wr1-x436.google.com [IPv6:2a00:1450:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B23AC06174A; Thu, 25 Mar 2021 09:41:04 -0700 (PDT) Received: by mail-wr1-x436.google.com with SMTP id o16so3011323wrn.0; Thu, 25 Mar 2021 09:41:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=THw8zcgbqLcO16dUqauFb0z8OAhU7380cxSadcHRy9U=; b=IloW8Z33ZDvYuKx2XBziTeFxCxMoDYKa2NhSguqvWJsy76doeS3uEx7rrkXSy+VKzz BWbxBOAjRnb89Bd5P5tQlGnn+/JgzAFTlXVlJL9Z1SUC0lv4+8R3ueo/oPDFUyy8fGHn 1wPjz4s88BAIv0gJFqEeTMCQOJXDx/WPNl2LM4q9EMJCn9306irOl1jnHcWDHgdXQxYd YKUNXJOloW5VBG4dIDj2cdClJzXgFkXshnWRJJjrXkN4pncRX+eseRdyd3xLFQrmDY+V kaM2Hkc3gFw/dYDyePPYYSL30Q99s/fQU00yUbo4RueJl9EiTrlR1i3++nqhkuwaaGft m1TQ== 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=THw8zcgbqLcO16dUqauFb0z8OAhU7380cxSadcHRy9U=; b=gTgX/56ta4LH6fuaKx0j8kv24d6vraV/T38kC2y6nuQIoZbyD5X6oidP3CjrhgjloJ GskhbNAX+n+v+gMXN2U2N5BKks/FdxdKnSCvcOW7vztrtl2Mvp6deF68Pj8nMflhtuWi 2zy4QrPIsyPfAVEJdD84/RW9Qt9PhCctOYXG0Z5fLhMDVzMTImb0FDtjbKyXm3bmeMfo ay81KLscAlQXOrrSVdi46rt5hQZ2VL3g/mug8H8umrfpLUaxwCx0OPh7NED8ltT6Lau0 mfx+Tg8U82L5yTKMP/QWQ72nhLj/NsRx/SdtFy7YQmC7MT+DyZbagHNJqJsQSfU3PcHN x2sQ== X-Gm-Message-State: AOAM531dzFtAgo8WZ4zIu5obI+kwiwtwj18CLmVMV4QjTnH2aVjypdt5 vronRixc4SGBGN1TTkw4CXU= X-Google-Smtp-Source: ABdhPJwS8D3jR/+zm9zeYJjDu4IIIl3Zh0tcS8mq+uGfbnHw8pab8S329eTtv5epyq7ZB+aN8xZozQ== X-Received: by 2002:adf:d236:: with SMTP id k22mr9959080wrh.144.1616690463074; Thu, 25 Mar 2021 09:41:03 -0700 (PDT) Received: from localhost ([62.96.65.119]) by smtp.gmail.com with ESMTPSA id k11sm7115040wmj.1.2021.03.25.09.40.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Mar 2021 09:40:59 -0700 (PDT) From: Thierry Reding To: Vinod Koul , Greg Kroah-Hartman Cc: Kishon Vijay Abraham I , Mathias Nyman , JC Kuo , Jon Hunter , linux-tegra@vger.kernel.org, linux-phy@lists.infradead.org, linux-usb@vger.kernel.org Subject: [PATCH v8 06/13] phy: tegra: xusb: Add sleepwalk and suspend/resume Date: Thu, 25 Mar 2021 17:40:50 +0100 Message-Id: <20210325164057.793954-7-thierry.reding@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210325164057.793954-1-thierry.reding@gmail.com> References: <20210325164057.793954-1-thierry.reding@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: JC Kuo This commit adds sleepwalk/wake and suspend/resume interfaces to Tegra XUSB PHY driver. Tegra XUSB host controller driver makes use of sleepwalk functions to enable/disable sleepwalk circuit which is in always-on partition and can respond to USB resume signals when controller is not powered. Sleepwalk can be enabled/disabled for any USB UPHY individually. - tegra_xusb_padctl_enable_phy_sleepwalk() - tegra_xusb_padctl_disable_phy_sleepwalk() Tegra XUSB host controller driver makes use of wake functions to enable/disable/query wake circuit which is in always-on partition can wake system up when USB resume happens. Wake circuit can be enabled/disabled for any USB PHY individually. - tegra_xusb_padctl_enable_phy_wake() - tegra_xusb_padctl_disable_phy_wake() - tegra_xusb_padctl_remote_wake_detected() This commit also adds two system suspend stubs that can be used to save and restore XUSB PADCTL context during system suspend and resume. - tegra_xusb_padctl_suspend_noirq() - tegra_xusb_padctl_resume_noirq() Signed-off-by: JC Kuo Signed-off-by: Thierry Reding Acked-By: Vinod Koul --- drivers/phy/tegra/xusb.c | 82 ++++++++++++++++++++++++++++++++++ drivers/phy/tegra/xusb.h | 8 ++++ include/linux/phy/tegra/xusb.h | 10 ++++- 3 files changed, 99 insertions(+), 1 deletion(-) diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c index a34d304677bb..0aadac678191 100644 --- a/drivers/phy/tegra/xusb.c +++ b/drivers/phy/tegra/xusb.c @@ -1273,10 +1273,36 @@ static int tegra_xusb_padctl_remove(struct platform_device *pdev) return err; } +static int tegra_xusb_padctl_suspend_noirq(struct device *dev) +{ + struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev); + + if (padctl->soc && padctl->soc->ops && padctl->soc->ops->suspend_noirq) + return padctl->soc->ops->suspend_noirq(padctl); + + return 0; +} + +static int tegra_xusb_padctl_resume_noirq(struct device *dev) +{ + struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev); + + if (padctl->soc && padctl->soc->ops && padctl->soc->ops->resume_noirq) + return padctl->soc->ops->resume_noirq(padctl); + + return 0; +} + +static const struct dev_pm_ops tegra_xusb_padctl_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_xusb_padctl_suspend_noirq, + tegra_xusb_padctl_resume_noirq) +}; + static struct platform_driver tegra_xusb_padctl_driver = { .driver = { .name = "tegra-xusb-padctl", .of_match_table = tegra_xusb_padctl_of_match, + .pm = &tegra_xusb_padctl_pm_ops, }, .probe = tegra_xusb_padctl_probe, .remove = tegra_xusb_padctl_remove, @@ -1343,6 +1369,62 @@ int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl, } EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle); +int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy, + enum usb_device_speed speed) +{ + struct tegra_xusb_lane *lane = phy_get_drvdata(phy); + + if (lane->pad->ops->enable_phy_sleepwalk) + return lane->pad->ops->enable_phy_sleepwalk(lane, speed); + + return -EOPNOTSUPP; +} +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk); + +int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy) +{ + struct tegra_xusb_lane *lane = phy_get_drvdata(phy); + + if (lane->pad->ops->disable_phy_sleepwalk) + return lane->pad->ops->disable_phy_sleepwalk(lane); + + return -EOPNOTSUPP; +} +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk); + +int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy) +{ + struct tegra_xusb_lane *lane = phy_get_drvdata(phy); + + if (lane->pad->ops->enable_phy_wake) + return lane->pad->ops->enable_phy_wake(lane); + + return -EOPNOTSUPP; +} +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake); + +int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy) +{ + struct tegra_xusb_lane *lane = phy_get_drvdata(phy); + + if (lane->pad->ops->disable_phy_wake) + return lane->pad->ops->disable_phy_wake(lane); + + return -EOPNOTSUPP; +} +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake); + +bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy) +{ + struct tegra_xusb_lane *lane = phy_get_drvdata(phy); + + if (lane->pad->ops->remote_wake_detected) + return lane->pad->ops->remote_wake_detected(lane); + + return false; +} +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_remote_wake_detected); + int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl, unsigned int port, bool enable) { diff --git a/drivers/phy/tegra/xusb.h b/drivers/phy/tegra/xusb.h index e789d5ff4eb8..034f7a2c28d6 100644 --- a/drivers/phy/tegra/xusb.h +++ b/drivers/phy/tegra/xusb.h @@ -11,6 +11,7 @@ #include #include +#include #include #include @@ -132,6 +133,11 @@ struct tegra_xusb_lane_ops { void (*remove)(struct tegra_xusb_lane *lane); void (*iddq_enable)(struct tegra_xusb_lane *lane); void (*iddq_disable)(struct tegra_xusb_lane *lane); + int (*enable_phy_sleepwalk)(struct tegra_xusb_lane *lane, enum usb_device_speed speed); + int (*disable_phy_sleepwalk)(struct tegra_xusb_lane *lane); + int (*enable_phy_wake)(struct tegra_xusb_lane *lane); + int (*disable_phy_wake)(struct tegra_xusb_lane *lane); + bool (*remote_wake_detected)(struct tegra_xusb_lane *lane); }; bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane, const char *function); @@ -396,6 +402,8 @@ struct tegra_xusb_padctl_ops { const struct tegra_xusb_padctl_soc *soc); void (*remove)(struct tegra_xusb_padctl *padctl); + int (*suspend_noirq)(struct tegra_xusb_padctl *padctl); + int (*resume_noirq)(struct tegra_xusb_padctl *padctl); int (*usb3_save_context)(struct tegra_xusb_padctl *padctl, unsigned int index); int (*hsic_set_idle)(struct tegra_xusb_padctl *padctl, diff --git a/include/linux/phy/tegra/xusb.h b/include/linux/phy/tegra/xusb.h index 71d956935405..3a35e74cdc61 100644 --- a/include/linux/phy/tegra/xusb.h +++ b/include/linux/phy/tegra/xusb.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-only */ /* - * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. + * Copyright (c) 2016-2020, NVIDIA CORPORATION. All rights reserved. */ #ifndef PHY_TEGRA_XUSB_H @@ -8,6 +8,7 @@ struct tegra_xusb_padctl; struct device; +enum usb_device_speed; struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev); void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl); @@ -23,4 +24,11 @@ int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl, int tegra_phy_xusb_utmi_port_reset(struct phy *phy); int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl, unsigned int port); +int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy, + enum usb_device_speed speed); +int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy); +int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy); +int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy); +bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy); + #endif /* PHY_TEGRA_XUSB_H */