1 files changed, 52 insertions, 0 deletions

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 9a7c53d09ab4..aa40e510b806 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -155,6 +155,7 @@ u32 hw_read_intr_status(struct ci_hdrc *ci)
 
 /**
  * hw_port_test_set: writes port test mode (execute without interruption)
+ * @ci: the controller
  * @mode: new value
  *
  * This function returns an error code
@@ -877,6 +878,33 @@ void ci_hdrc_remove_device(struct platform_device *pdev)
 }
 EXPORT_SYMBOL_GPL(ci_hdrc_remove_device);
 
+/**
+ * ci_hdrc_query_available_role: get runtime available operation mode
+ *
+ * The glue layer can get current operation mode (host/peripheral/otg)
+ * This function should be called after ci core device has created.
+ *
+ * @pdev: the platform device of ci core.
+ *
+ * Return runtime usb_dr_mode.
+ */
+enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev)
+{
+	struct ci_hdrc *ci = platform_get_drvdata(pdev);
+
+	if (!ci)
+		return USB_DR_MODE_UNKNOWN;
+	if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])
+		return USB_DR_MODE_OTG;
+	else if (ci->roles[CI_ROLE_HOST])
+		return USB_DR_MODE_HOST;
+	else if (ci->roles[CI_ROLE_GADGET])
+		return USB_DR_MODE_PERIPHERAL;
+	else
+		return USB_DR_MODE_UNKNOWN;
+}
+EXPORT_SYMBOL_GPL(ci_hdrc_query_available_role);
+
 static inline void ci_role_destroy(struct ci_hdrc *ci)
 {
 	ci_hdrc_gadget_destroy(ci);
@@ -1243,6 +1271,29 @@ static void ci_controller_suspend(struct ci_hdrc *ci)
 	enable_irq(ci->irq);
 }
 
+/*
+ * Handle the wakeup interrupt triggered by extcon connector
+ * We need to call ci_irq again for extcon since the first
+ * interrupt (wakeup int) only let the controller be out of
+ * low power mode, but not handle any interrupts.
+ */
+static void ci_extcon_wakeup_int(struct ci_hdrc *ci)
+{
+	struct ci_hdrc_cable *cable_id, *cable_vbus;
+	u32 otgsc = hw_read_otgsc(ci, ~0);
+
+	cable_id = &ci->platdata->id_extcon;
+	cable_vbus = &ci->platdata->vbus_extcon;
+
+	if (!IS_ERR(cable_id->edev) && ci->is_otg &&
+		(otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS))
+		ci_irq(ci->irq, ci);
+
+	if (!IS_ERR(cable_vbus->edev) && ci->is_otg &&
+		(otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS))
+		ci_irq(ci->irq, ci);
+}
+
 static int ci_controller_resume(struct device *dev)
 {
 	struct ci_hdrc *ci = dev_get_drvdata(dev);
@@ -1275,6 +1326,7 @@ static int ci_controller_resume(struct device *dev)
 		enable_irq(ci->irq);
 		if (ci_otg_is_fsm_mode(ci))
 			ci_otg_fsm_wakeup_by_srp(ci);
+		ci_extcon_wakeup_int(ci);
 	}
 
 	return 0;