@@ -20,7 +20,8 @@
#include <linux/usb/of.h>
#include <linux/reset.h>
#include <linux/iopoll.h>
-
+#include <linux/usb/hcd.h>
+#include <linux/usb.h>
#include "core.h"
/* USB QSCRATCH Hardware registers */
@@ -76,6 +77,7 @@ struct dwc3_qcom {
int dp_hs_phy_irq;
int dm_hs_phy_irq;
int ss_phy_irq;
+ enum usb_device_speed usb2_speed;
struct extcon_dev *edev;
struct extcon_dev *host_edev;
@@ -296,11 +298,34 @@ static void dwc3_qcom_interconnect_exit(struct dwc3_qcom *qcom)
icc_put(qcom->icc_path_apps);
}
-static void dwc3_qcom_enable_wakeup_irq(int irq)
+enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom)
+{
+ struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
+ struct usb_hcd *hcd = platform_get_drvdata(dwc->xhci);
+ struct usb_device *udev;
+
+ /*
+ * It is possible to query the speed of all children of
+ * USB2.0 root hub via usb_hub_for_each_child(). DWC3 code
+ * currently supports only 1 port per controller. So
+ * this is sufficient.
+ */
+ udev = usb_hub_find_child(hcd->self.root_hub, 1);
+
+ if (!udev)
+ return USB_SPEED_UNKNOWN;
+
+ return udev->speed;
+}
+
+static void dwc3_qcom_enable_wakeup_irq(int irq, unsigned int polarity)
{
if (!irq)
return;
+ if (polarity)
+ irq_set_irq_type(irq, polarity);
+
enable_irq(irq);
enable_irq_wake(irq);
}
@@ -318,22 +343,47 @@ static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
{
dwc3_qcom_disable_wakeup_irq(qcom->hs_phy_irq);
- dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
-
- dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
+ if (qcom->usb2_speed == USB_SPEED_LOW) {
+ dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
+ } else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
+ (qcom->usb2_speed == USB_SPEED_FULL)) {
+ dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
+ } else {
+ dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
+ dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
+ }
dwc3_qcom_disable_wakeup_irq(qcom->ss_phy_irq);
}
static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
{
- dwc3_qcom_enable_wakeup_irq(qcom->hs_phy_irq);
+ dwc3_qcom_enable_wakeup_irq(qcom->hs_phy_irq, 0);
- dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq);
+ /*
+ * Configure DP/DM line interrupts based on the USB2 device attached to
+ * the root hub port. When HS/FS device is connected, configure the DP line
+ * as falling edge to detect both disconnect and remote wakeup scenarios. When
+ * LS device is connected, configure DM line as falling edge to detect both
+ * disconnect and remote wakeup. When no device is connected, configure both
+ * DP and DM lines as rising edge to detect HS/HS/LS device connect scenario.
+ */
- dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq);
+ if (qcom->usb2_speed == USB_SPEED_LOW) {
+ dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq,
+ IRQ_TYPE_EDGE_FALLING);
+ } else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
+ (qcom->usb2_speed == USB_SPEED_FULL)) {
+ dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq,
+ IRQ_TYPE_EDGE_FALLING);
+ } else {
+ dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq,
+ IRQ_TYPE_EDGE_RISING);
+ dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq,
+ IRQ_TYPE_EDGE_RISING);
+ }
- dwc3_qcom_enable_wakeup_irq(qcom->ss_phy_irq);
+ dwc3_qcom_enable_wakeup_irq(qcom->ss_phy_irq, 0);
}
static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
@@ -355,8 +405,10 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
if (ret)
dev_warn(qcom->dev, "failed to disable interconnect: %d\n", ret);
- if (device_may_wakeup(qcom->dev))
+ if (device_may_wakeup(qcom->dev)) {
+ qcom->usb2_speed = dwc3_qcom_read_usb2_speed(qcom);
dwc3_qcom_enable_interrupts(qcom);
+ }
qcom->is_suspended = true;