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-rw-r--r--payloads/libpayload/drivers/usb/usb.c4
-rw-r--r--payloads/libpayload/include/usb/usb.h7
2 files changed, 11 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/usb/usb.c b/payloads/libpayload/drivers/usb/usb.c
index accb228b95..b14abb4b35 100644
--- a/payloads/libpayload/drivers/usb/usb.c
+++ b/payloads/libpayload/drivers/usb/usb.c
@@ -86,6 +86,10 @@ usb_poll (void)
{
if (usb_hcs == 0)
return;
+
+ if (usb_poll_prepare)
+ usb_poll_prepare();
+
hci_t *controller = usb_hcs;
while (controller != NULL) {
int i;
diff --git a/payloads/libpayload/include/usb/usb.h b/payloads/libpayload/include/usb/usb.h
index 8f3169ef09..f79fc27711 100644
--- a/payloads/libpayload/include/usb/usb.h
+++ b/payloads/libpayload/include/usb/usb.h
@@ -345,6 +345,13 @@ static inline void usb_debug(const char *fmt, ...)
}
/**
+ * To be implemented by libpayload-client. It's called by the USB
+ * stack just before iterating over known devices to poll them for
+ * status change.
+ */
+void __attribute__((weak)) usb_poll_prepare (void);
+
+/**
* To be implemented by libpayload-client. It's called by the USB stack
* when a new USB device is found which isn't claimed by a built in driver,
* so the client has the chance to know about it.