USB: gadget: added a saner gadget downloader registration API
Preprocessor definitions and hardcoded implementation selection in
g_dnl core were replaced by a linker list made of (usb_function_name,
bind_callback) pairs.
Signed-off-by: Mateusz Zalega <m.zalega@samsung.com>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Marek Vasut <marex@denx.de>
diff --git a/include/g_dnl.h b/include/g_dnl.h
index f4e8d10..1b1b35e 100644
--- a/include/g_dnl.h
+++ b/include/g_dnl.h
@@ -10,6 +10,29 @@
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
+#include <linux/usb/composite.h>
+#include <linker_lists.h>
+
+/*
+ * @usb_fname: unescaped USB function name
+ * @callback_ptr: bind callback, one per function name
+ */
+#define DECLARE_GADGET_BIND_CALLBACK(usb_fname, callback_ptr) \
+ ll_entry_declare(struct g_dnl_bind_callback, \
+ __usb_function_name_##usb_fname, \
+ g_dnl_bind_callbacks) = { \
+ .usb_function_name = #usb_fname, \
+ .fptr = callback_ptr \
+ }
+
+typedef int (*g_dnl_bind_callback_f)(struct usb_configuration *);
+
+/* used in Gadget downloader callback linker list */
+struct g_dnl_bind_callback {
+ const char *usb_function_name;
+ g_dnl_bind_callback_f fptr;
+};
+
int g_dnl_bind_fixup(struct usb_device_descriptor *, const char *);
int g_dnl_board_usb_cable_connected(void);
int g_dnl_register(const char *s);