usb: host: class: add a placeholder call after a device is connected

Add an ad-hoc placeholder that allows executing a function from the
a single class, through a global variable defined in the USB class
enabled. This does not allow several USB classes to co-exist so is not a
long term solution and is meant to be replaced by a class API.

Signed-off-by: Josuah Demangeon <[email protected]>

Author: Josuah Demangeon

subsys/usb/host/usbh_core.c

@@ -29,6 +29,8 @@ K_MSGQ_DEFINE(usbh_msgq, sizeof(struct uhc_event),
 K_MSGQ_DEFINE(usbh_bus_msgq, sizeof(struct uhc_event),
 	      CONFIG_USBH_MAX_UHC_MSG, sizeof(uint32_t));
 
+extern const struct usbh_class_data *usbh_class_data;
+
 static int usbh_event_carrier(const struct device *dev,
 			      const struct uhc_event *const event)
 {
@@ -70,6 +72,12 @@ static void dev_connected_handler(struct usbh_context *const ctx,
 
 	if (usbh_device_init(ctx->root)) {
 		LOG_ERR("Failed to reset new USB device");
+		return;
+	}
+
+	if (usbh_class_data->connected(ctx)) {
+		LOG_ERR("The class failed to handle the connection");
+		return;
 	}
 }