USB: usb-hub: Add a weak function for resetting devices

Add a __weak function that can be overridden to reset devices attached to an ehci devices after the FEAT_POWER has been submitted Signed-off-by: Dan Murphy <dmurphy@ti.com>

USB: usb-hub: Add a weak function for resetting devices
Add a __weak function that can be overridden to reset devices attached to an ehci devices after the FEAT_POWER has been submitted Signed-off-by: Dan Murphy <dmurphy@ti.com>
Dan Murphy · Marek Vasut
1 parent 04025b42dc
Showing 1 changed file with 12 additions and 0 deletions Side-by-side Diff
common/usb_hub.c
@@ -44,6 +44,10 @@
 static struct usb_hub_device hub_dev[USB_MAX_HUB];
 static int usb_hub_index;
  
+__weak void usb_hub_reset_devices(int port)
+{
+	return;
+}
  
 static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
 {
@@ -425,6 +429,14 @@
 	      (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
 	      "" : "no ");
 	usb_hub_power_on(hub);
+
+	/*
+	 * Reset any devices that may be in a bad state when applying
+	 * the power.  This is a __weak function.  Resetting of the devices
+	 * should occur in the board file of the device.
+	 */
+	for (i = 0; i < dev->maxchild; i++)
+		usb_hub_reset_devices(i + 1);
  
 	for (i = 0; i < dev->maxchild; i++) {
 		ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
...	...	@@ -44,6 +44,10 @@
44	44	static struct usb_hub_device hub_dev[USB_MAX_HUB];
45	45	static int usb_hub_index;
46	46
	47	+__weak void usb_hub_reset_devices(int port)
	48	+{
	49	+ return;
	50	+}
47	51
48	52	static int usb_get_hub_descriptor(struct usb_device dev, void data, int size)
49	53	{
...	...	@@ -425,6 +429,14 @@
425	429	(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
426	430	"" : "no ");
427	431	usb_hub_power_on(hub);
	432	+
	433	+ /*
	434	+ * Reset any devices that may be in a bad state when applying
	435	+ * the power. This is a __weak function. Resetting of the devices
	436	+ * should occur in the board file of the device.
	437	+ */
	438	+ for (i = 0; i < dev->maxchild; i++)
	439	+ usb_hub_reset_devices(i + 1);
428	440
429	441	for (i = 0; i < dev->maxchild; i++) {
430	442	ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);