From patchwork Mon Aug 31 04:40:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: JC Kuo X-Patchwork-Id: 11745491 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 82DBF913 for ; Mon, 31 Aug 2020 04:41:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6658A207EA for ; Mon, 31 Aug 2020 04:41:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="njRTzs8j" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726564AbgHaEkw (ORCPT ); Mon, 31 Aug 2020 00:40:52 -0400 Received: from hqnvemgate24.nvidia.com ([216.228.121.143]:1167 "EHLO hqnvemgate24.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725446AbgHaEks (ORCPT ); Mon, 31 Aug 2020 00:40:48 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate24.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Sun, 30 Aug 2020 21:38:42 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Sun, 30 Aug 2020 21:40:48 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Sun, 30 Aug 2020 21:40:48 -0700 Received: from HQMAIL105.nvidia.com (172.20.187.12) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 31 Aug 2020 04:40:44 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 31 Aug 2020 04:40:43 +0000 Received: from jckuo-lt.nvidia.com (Not Verified[10.19.101.4]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Sun, 30 Aug 2020 21:40:43 -0700 From: JC Kuo To: , , , , CC: , , , , , JC Kuo Subject: [PATCH v2 05/12] phy: tegra: xusb: add sleepwalk and suspend/resume Date: Mon, 31 Aug 2020 12:40:36 +0800 Message-ID: <20200831044043.1561074-6-jckuo@nvidia.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200831044043.1561074-1-jckuo@nvidia.com> References: <20200831044043.1561074-1-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=1598848722; bh=kX0RwgveLiINhWbSkybtsDBLi2N6bZpxn7iuTnuZPAY=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=njRTzs8jxy6HADsDyN6JKCqQSQW+44PXFOgOxxvcwtQdwrgN1K8bvs21bdQjyAx1H dDQ1SobW5bTxbQAwJ9+O2v23BUZFVaZrDqrEC4bxkC2bZFjBrpG3TUo7sGJy+twZmq JFlbUd+ct0a98++d82cnITwBZqXiq3EGkkY7KpErzsJ6oLCLcgU82q2w8e8mvsKGgW +G4jUsVerFY3aoKX5OL8M4uLR9dz+crC6hDyTMgqbu0KEpIy9X2i6orIv0Q5LTsv8f BvheWlPIPVqxawPXryV8H6IeW/IH5uxGGksw6e70rnxaX4u6iAEedV4nxjUhAR3x0U qk6ZD8+AVzsHQ== Sender: linux-usb-owner@vger.kernel.org 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 can respond to USB resume signals when controller is not powered. Sleepwalk can be enabled/disabled for any USB phy 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 --- drivers/phy/tegra/xusb.c | 78 ++++++++++++++++++++++++++++++++++ drivers/phy/tegra/xusb.h | 13 ++++++ include/linux/phy/tegra/xusb.h | 13 ++++++ 3 files changed, 104 insertions(+) diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c index 74abd67e3a31..3a1551c42c29 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 +1370,58 @@ 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) +{ + if (padctl->soc->ops->enable_phy_sleepwalk) + return padctl->soc->ops->enable_phy_sleepwalk(padctl, phy, + speed); + + return -ENOTSUPP; +} +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk); + +int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, + struct phy *phy) +{ + if (padctl->soc->ops->disable_phy_sleepwalk) + return padctl->soc->ops->disable_phy_sleepwalk(padctl, phy); + + return -ENOTSUPP; +} +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk); + +int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, + struct phy *phy) +{ + if (padctl->soc->ops->enable_phy_wake) + return padctl->soc->ops->enable_phy_wake(padctl, phy); + + return -ENOTSUPP; +} +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake); + +int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, + struct phy *phy) +{ + if (padctl->soc->ops->disable_phy_wake) + return padctl->soc->ops->disable_phy_wake(padctl, phy); + + return -ENOTSUPP; +} +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake); + +int tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, + struct phy *phy) +{ + if (padctl->soc->ops->remote_wake_detected) + return padctl->soc->ops->remote_wake_detected(phy); + + return -ENOTSUPP; +} +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 485b692a3b15..c1c4ea3ce050 100644 --- a/drivers/phy/tegra/xusb.h +++ b/drivers/phy/tegra/xusb.h @@ -11,6 +11,7 @@ #include #include +#include #include #include @@ -392,6 +393,8 @@ 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, @@ -400,6 +403,16 @@ struct tegra_xusb_padctl_ops { unsigned int index, bool enable); int (*vbus_override)(struct tegra_xusb_padctl *padctl, bool set); int (*utmi_port_reset)(struct phy *phy); + int (*enable_phy_sleepwalk)(struct tegra_xusb_padctl *padctl, + struct phy *phy, + enum usb_device_speed speed); + int (*disable_phy_sleepwalk)(struct tegra_xusb_padctl *padctl, + struct phy *phy); + int (*enable_phy_wake)(struct tegra_xusb_padctl *padctl, + struct phy *phy); + int (*disable_phy_wake)(struct tegra_xusb_padctl *padctl, + struct phy *phy); + int (*remote_wake_detected)(struct phy *phy); }; struct tegra_xusb_padctl_soc { diff --git a/include/linux/phy/tegra/xusb.h b/include/linux/phy/tegra/xusb.h index 71d956935405..9621e69067e1 100644 --- a/include/linux/phy/tegra/xusb.h +++ b/include/linux/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 +24,16 @@ 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); +int tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, + struct phy *phy); + #endif /* PHY_TEGRA_XUSB_H */