From 4a6ccfb4482a1eb8e9bcf51727db4031dc65b1ce Mon Sep 17 00:00:00 2001
From: Raphael Assenat <raph@raphnet.net>
Date: Sun, 6 Dec 2015 16:36:33 -0500
Subject: [PATCH] Gamecube hotplugging infrastructure

---
 gamecube.c | 6 ++++++
 gamepads.h | 1 +
 main.c     | 6 ++++++
 3 files changed, 13 insertions(+)

diff --git a/gamecube.c b/gamecube.c
index e978572..baf73cc 100644
--- a/gamecube.c
+++ b/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)
diff --git a/gamepads.h b/gamepads.h
index 33c47a2..7a60726 100644
--- a/gamepads.h
+++ b/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 */
diff --git a/main.c b/main.c
index 03c0d81..7e7096f 100644
--- a/main.c
+++ b/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()) {