@@ -158,6 +158,45 @@ int usb_get_max_xfer_size(struct usb_device *udev, size_t *size)
return ops->get_max_xfer_size(bus, size);
}
+int __usb_stop(void)
+{
+ struct udevice *bus;
+ struct udevice *rh;
+ struct uclass *uc;
+ struct usb_uclass_priv *uc_priv;
+ int err = 0, ret;
+
+ /* De-activate any devices that have been activated */
+ ret = uclass_get(UCLASS_USB_DEV_GENERIC, &uc);
+ if (ret)
+ return ret;
+
+ uc_priv = uc->priv;
+
+ uclass_foreach_dev(bus, uc) {
+ ret = device_remove(bus, DM_REMOVE_NORMAL);
+ if (ret && !err)
+ err = ret;
+
+ /* Locate root hub device */
+ device_find_first_child(bus, &rh);
+ if (rh) {
+ /*
+ * All USB devices are children of root hub.
+ * Unbinding root hub will unbind all of its children.
+ */
+ ret = device_unbind(rh);
+ if (ret && !err)
+ err = ret;
+ }
+ }
+
+ uc_priv->companion_device_count = 0;
+ usb_started = 0;
+
+ return err;
+}
+
int usb_stop(void)
{
struct udevice *bus;
@@ -166,6 +205,10 @@ int usb_stop(void)
struct usb_uclass_priv *uc_priv;
int err = 0, ret;
+ ret = __usb_stop();
+ if (ret)
+ return ret;
+
/* De-activate any devices that have been activated */
ret = uclass_get(UCLASS_USB, &uc);
if (ret)
Some OTG controllers which operates on Peripheral mode are registered as UCLASS_USB_DEV_GENERIC. So add support to shutdown them as well. shutdown happened during 'usb reset' and U-Boot handoff code for Linux boot. controller restarting in 'usb reset' like probing again is still missing for this type of UCLASS. Cc: Simon Glass <sjg@chromium.org> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> --- Note: I tried of traversing for multiple UCLASS in removal code in usb_stop, but couldn't come with proper solutions. I don't think any other area of code need a requirement like this, or may be I'm missing. any help would appreciate. drivers/usb/host/usb-uclass.c | 43 +++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+)