From patchwork Fri Oct 16 13:07:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: JC Kuo X-Patchwork-Id: 11841719 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 95B2F15E6 for ; Fri, 16 Oct 2020 13:08:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6CBB7207F7 for ; Fri, 16 Oct 2020 13:08:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="Wzsc0ubb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2408168AbgJPNIj (ORCPT ); Fri, 16 Oct 2020 09:08:39 -0400 Received: from hqnvemgate26.nvidia.com ([216.228.121.65]:14304 "EHLO hqnvemgate26.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2408108AbgJPNIN (ORCPT ); Fri, 16 Oct 2020 09:08:13 -0400 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Fri, 16 Oct 2020 06:08:01 -0700 Received: from HQMAIL107.nvidia.com (172.20.187.13) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 16 Oct 2020 13:08:10 +0000 Received: from jckuo-lt.nvidia.com (172.20.13.39) by mail.nvidia.com (172.20.187.13) with Microsoft SMTP Server id 15.0.1473.3 via Frontend Transport; Fri, 16 Oct 2020 13:08:08 +0000 From: JC Kuo To: , , , , CC: , , , , , JC Kuo Subject: [PATCH v4 07/16] phy: tegra: xusb: Add sleepwalk and suspend/resume Date: Fri, 16 Oct 2020 21:07:17 +0800 Message-ID: <20201016130726.1378666-8-jckuo@nvidia.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201016130726.1378666-1-jckuo@nvidia.com> References: <20201016130726.1378666-1-jckuo@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1602853681; bh=OWI4cyiiZOaTHeFHihqIVC0+O5bSQCAyhS2E3AfiBMQ=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To: References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=Wzsc0ubbG/5M1IS5F5wKEL1oy6oTI14zgCbtOH/tGMO1BZuccALcWcRHTxW2BScEn lBTnmBCPZyfidg6etSoYXkK3zyt5WRLxAVKfh6GL10nHA+3iu96TdKvcgMpFrLjhos 3pUjCnUBZ2pjZ9mTzK9VNocNjuaqEH4XBJy7JRhrko7ZIVnxlRjWAM8qTGBK7yhegd oHA/1BiwckUG9/BQrE3legmbQUWMTWhnTSivlIixXrvsSLGTT7r6J70tXg/+LXY1FX T/2hlvDlcXMbSsPcb1XmtNN4OlEfxWPOkHz/KunODQ9yPhtEF0uJUJ+Nj2uZkBSCf0 fk7EtEcSwj4IQ== Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org 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 --- v4: move sleepwalk/wake stubs from 'struct tegra_xusb_padctl_ops' to 'struct tegra_xusb_lane_ops' v3: commit message improvement, no change in code 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 90578fb98aab..f0dc9c43959f 100644 --- a/drivers/phy/tegra/xusb.c +++ b/drivers/phy/tegra/xusb.c @@ -1274,10 +1274,36 @@ 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, @@ -1344,6 +1370,62 @@ 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 */