From de29db4632a64cc7c20eb626a1b17e41e50adb26 Mon Sep 17 00:00:00 2001
From: Peter Wu <peter@lekensteyn.nl>
Date: Sun, 17 Aug 2014 23:12:01 +0200
Subject: WIP firmware reverse engineering

Not touched since 7 April 2014.
---
 hw/usb/hid-logitech-hidpp20.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'hw/usb/hid-logitech-hidpp20.c')

diff --git a/hw/usb/hid-logitech-hidpp20.c b/hw/usb/hid-logitech-hidpp20.c
index 51e9596151..e3d451a1ef 100644
--- a/hw/usb/hid-logitech-hidpp20.c
+++ b/hw/usb/hid-logitech-hidpp20.c
@@ -271,8 +271,13 @@ static HIDPP20_FEATURE(feat_featureinfo)
 
 static HIDPP20_FEATURE(feat_dfucontrol)
 {
-    return -HIDPP20_ERR_CODE_UNSUPPORTED; /* TODO: figure out */
     switch (fn) {
+    case 0:
+        if (!memcmp(params, "DFU", 3)) {
+            hd->dfu.active = true;
+            return 0;
+        }
+        return -HIDPP20_ERR_CODE_INVALIDARGUMENT;
     default:
         return -HIDPP20_ERR_CODE_INVALID_FUNCTION_ID;
     }
-- 
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