linux-kernel - [PATCH v2 2/3] usb: dwc3: qcom: Configure wakeup interrupts and set genpd active wakeup flag

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Message-Id: <1594235417-23066-3-git-send-email-sanm@codeaurora.org>
Date:   Thu,  9 Jul 2020 00:40:16 +0530
From:   Sandeep Maheswaram <sanm@...eaurora.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Felipe Balbi <balbi@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Doug Anderson <dianders@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Manu Gautam <mgautam@...eaurora.org>,
        Sandeep Maheswaram <sanm@...eaurora.org>
Subject: [PATCH v2 2/3] usb: dwc3: qcom: Configure wakeup interrupts and set genpd active wakeup flag

configure interrupts based on hs_phy_flag. Set genpd active wakeup flag
for usb gdsc if wakeup capable devices are connected.

Signed-off-by: Sandeep Maheswaram <sanm@...eaurora.org>
---
 drivers/usb/dwc3/dwc3-qcom.c | 73 ++++++++++++++++++++++++++++++++++----------
 1 file changed, 57 insertions(+), 16 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 1dfd024..8902670 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -16,9 +16,11 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/phy/phy.h>
+#include <linux/pm_domain.h>
 #include <linux/usb/of.h>
 #include <linux/reset.h>
 #include <linux/iopoll.h>
+#include <linux/usb/hcd.h>
 
 #include "core.h"
 
@@ -192,21 +194,34 @@ static int dwc3_qcom_register_extcon(struct dwc3_qcom *qcom)
 
 static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
 {
+	struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
+
 	if (qcom->hs_phy_irq) {
 		disable_irq_wake(qcom->hs_phy_irq);
 		disable_irq_nosync(qcom->hs_phy_irq);
 	}
+	if (dwc->hs_phy_flags & PHY_MODE_USB_HOST_LS) {
+		if (qcom->dp_hs_phy_irq) {
+			disable_irq_wake(qcom->dp_hs_phy_irq);
+			disable_irq_nosync(qcom->dp_hs_phy_irq);
+		}
+	} else if (dwc->hs_phy_flags & PHY_MODE_USB_HOST_HS) {
+		if (qcom->dm_hs_phy_irq) {
+			disable_irq_wake(qcom->dm_hs_phy_irq);
+			disable_irq_nosync(qcom->dm_hs_phy_irq);
+		}
+	} else {
 
-	if (qcom->dp_hs_phy_irq) {
-		disable_irq_wake(qcom->dp_hs_phy_irq);
-		disable_irq_nosync(qcom->dp_hs_phy_irq);
-	}
+		if (qcom->dp_hs_phy_irq) {
+			disable_irq_wake(qcom->dp_hs_phy_irq);
+			disable_irq_nosync(qcom->dp_hs_phy_irq);
+		}
 
-	if (qcom->dm_hs_phy_irq) {
-		disable_irq_wake(qcom->dm_hs_phy_irq);
-		disable_irq_nosync(qcom->dm_hs_phy_irq);
+		if (qcom->dm_hs_phy_irq) {
+			disable_irq_wake(qcom->dm_hs_phy_irq);
+			disable_irq_nosync(qcom->dm_hs_phy_irq);
+		}
 	}
-
 	if (qcom->ss_phy_irq) {
 		disable_irq_wake(qcom->ss_phy_irq);
 		disable_irq_nosync(qcom->ss_phy_irq);
@@ -215,21 +230,34 @@ static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
 
 static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
 {
+	struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
+
 	if (qcom->hs_phy_irq) {
 		enable_irq(qcom->hs_phy_irq);
 		enable_irq_wake(qcom->hs_phy_irq);
 	}
+	if (dwc->hs_phy_flags & PHY_MODE_USB_HOST_LS) {
+		if (qcom->dp_hs_phy_irq) {
+			enable_irq(qcom->dp_hs_phy_irq);
+			enable_irq_wake(qcom->dp_hs_phy_irq);
+		}
+	} else if (dwc->hs_phy_flags & PHY_MODE_USB_HOST_HS) {
+		if (qcom->dm_hs_phy_irq) {
+			enable_irq(qcom->dm_hs_phy_irq);
+			enable_irq_wake(qcom->dm_hs_phy_irq);
+		}
+	} else {
 
-	if (qcom->dp_hs_phy_irq) {
-		enable_irq(qcom->dp_hs_phy_irq);
-		enable_irq_wake(qcom->dp_hs_phy_irq);
-	}
+		if (qcom->dp_hs_phy_irq) {
+			enable_irq(qcom->dp_hs_phy_irq);
+			enable_irq_wake(qcom->dp_hs_phy_irq);
+		}
 
-	if (qcom->dm_hs_phy_irq) {
-		enable_irq(qcom->dm_hs_phy_irq);
-		enable_irq_wake(qcom->dm_hs_phy_irq);
+		if (qcom->dm_hs_phy_irq) {
+			enable_irq(qcom->dm_hs_phy_irq);
+			enable_irq_wake(qcom->dm_hs_phy_irq);
+		}
 	}
-
 	if (qcom->ss_phy_irq) {
 		enable_irq(qcom->ss_phy_irq);
 		enable_irq_wake(qcom->ss_phy_irq);
@@ -240,6 +268,14 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
 {
 	u32 val;
 	int i;
+	struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
+	struct usb_hcd  *hcd = platform_get_drvdata(dwc->xhci);
+	struct generic_pm_domain *genpd;
+
+	genpd = pd_to_genpd(qcom->dev->pm_domain);
+
+	if (genpd && usb_wakeup_enabled_descendants(hcd->self.root_hub))
+		genpd->flags |= GENPD_FLAG_ACTIVE_WAKEUP;
 
 	if (qcom->is_suspended)
 		return 0;
@@ -261,6 +297,11 @@ static int dwc3_qcom_resume(struct dwc3_qcom *qcom)
 {
 	int ret;
 	int i;
+	struct generic_pm_domain *genpd;
+
+	genpd = pd_to_genpd(qcom->dev->pm_domain);
+	if (genpd)
+		genpd->flags &= !GENPD_FLAG_ACTIVE_WAKEUP;
 
 	if (!qcom->is_suspended)
 		return 0;
-- 
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