Gamecube hotplugging infrastructure

gamecube.c

@@ -156,6 +156,11 @@ static char gamecubeUpdate()
 	return 0;
 }
 
+static void gamecubeHotplug(void)
+{
+	// Make sure next read becomes the refence center values
+	origins_set = 0;
+}
 
 static char gamecubeProbe(void)
 {
@@ -191,6 +196,7 @@ Gamepad GamecubeGamepad = {
 	.getReport				= gamecubeGetReport,
 	.probe					= gamecubeProbe,
 	.setVibration			= gamecubeVibration,
+	.hotplug				= gamecubeHotplug,
 };
 
 Gamepad *gamecubeGetGamepad(void)

gamepads.h

@@ -75,6 +75,7 @@ typedef struct {
 	void (*init)(void);
 	char (*update)(void);
 	char (*changed)(void);
+	void (*hotplug)(void);
 	void (*getReport)(gamepad_data *dst);
 	void (*setVibration)(char enable);
 	char (*probe)(void); /* return true if found */

main.c

@@ -305,6 +305,12 @@ int main(void)
 				/* Try to auto-detect controller if none*/
 				if (!pad) {
 					pad = detectPad();
+					if (pad->hotplug) {
+						// For gamecube, this make sure the next
+						// analog values we read become the center
+						// reference.
+						pad->hotplug();
+					}
 				}
 				if (pad) {
 					if (pad->update()) {