linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: JC Kuo <jckuo@nvidia.com>
To: <gregkh@linuxfoundation.org>, <thierry.reding@gmail.com>,
	<robh@kernel.org>, <jonathanh@nvidia.com>, <kishon@ti.com>
Cc: <linux-tegra@vger.kernel.org>, <linux-usb@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<nkristam@nvidia.com>, JC Kuo <jckuo@nvidia.com>
Subject: [PATCH v2 05/12] phy: tegra: xusb: add sleepwalk and suspend/resume
Date: Mon, 31 Aug 2020 12:40:36 +0800	[thread overview]
Message-ID: <20200831044043.1561074-6-jckuo@nvidia.com> (raw)
In-Reply-To: <20200831044043.1561074-1-jckuo@nvidia.com>

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 <jckuo@nvidia.com>
---
 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 <linux/mutex.h>
 #include <linux/workqueue.h>
 
+#include <linux/usb/ch9.h>
 #include <linux/usb/otg.h>
 #include <linux/usb/role.h>
 
@@ -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 */
-- 
2.25.1


  parent reply	other threads:[~2020-08-31  4:41 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-31  4:40 [PATCH v2 00/12] Tegra XHCI controller ELPG support JC Kuo
2020-08-31  4:40 ` [PATCH v2 01/12] clk: tegra: Add PLLE HW power sequencer control JC Kuo
2020-08-31  4:40 ` [PATCH v2 02/12] clk: tegra: don't enable PLLE HW sequencer at init JC Kuo
2020-08-31  4:40 ` [PATCH v2 03/12] phy: tegra: xusb: t210: rearrange UPHY init JC Kuo
2020-08-31 11:42   ` Thierry Reding
2020-09-04  9:10     ` JC Kuo
2020-08-31  4:40 ` [PATCH v2 04/12] phy: tegra: xusb: t210: add lane_iddq operations JC Kuo
2020-08-31 11:53   ` Thierry Reding
2020-09-07  2:26     ` JC Kuo
2020-08-31  4:40 ` JC Kuo [this message]
2020-08-31 11:58   ` [PATCH v2 05/12] phy: tegra: xusb: add sleepwalk and suspend/resume Thierry Reding
2020-09-07  2:34     ` JC Kuo
2020-08-31  4:40 ` [PATCH v2 06/12] soc/tegra: pmc: provide usb sleepwalk register map JC Kuo
2020-08-31 12:09   ` Thierry Reding
2020-09-07  3:07     ` JC Kuo
2020-08-31  4:40 ` [PATCH v2 07/12] arm64: tegra210: XUSB PADCTL add "nvidia,pmc" prop JC Kuo
2020-08-31  4:40 ` [PATCH v2 08/12] phy: tegra: xusb: t210: support wake and sleepwalk JC Kuo
2020-08-31 12:37   ` Thierry Reding
2020-09-08  1:14     ` JC Kuo
2020-09-01 15:14   ` kernel test robot
2020-08-31  4:40 ` [PATCH v2 09/12] phy: tegra: xusb: t186: " JC Kuo
2020-08-31 12:38   ` Thierry Reding
2020-09-01 16:51   ` kernel test robot
2020-08-31  4:40 ` [PATCH v2 10/12] arm64: tegra210/tegra186/tegra194: XUSB PADCTL irq JC Kuo
2020-08-31  4:40 ` [PATCH v2 11/12] usb: host: xhci-tegra: unlink power domain devices JC Kuo
2020-08-31 12:42   ` Thierry Reding
2020-09-08  2:19     ` JC Kuo
2020-08-31  4:40 ` [PATCH v2 12/12] xhci: tegra: enable ELPG for runtime/system PM JC Kuo
2020-08-31 12:50   ` Thierry Reding
2020-09-08  2:29     ` JC Kuo
2020-09-01 20:33   ` Dmitry Osipenko
2020-09-08  2:42     ` JC Kuo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200831044043.1561074-6-jckuo@nvidia.com \
    --to=jckuo@nvidia.com \
    --cc=devicetree@vger.kernel.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=jonathanh@nvidia.com \
    --cc=kishon@ti.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-tegra@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=nkristam@nvidia.com \
    --cc=robh@kernel.org \
    --cc=thierry.reding@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).