From 01d924b27ac1e72eba69eabecda4cf51d200d66d Mon Sep 17 00:00:00 2001
From: Martin Whitaker <memtest@martin-whitaker.me.uk>
Date: Thu, 14 Aug 2025 18:57:41 +0100
Subject: [PATCH] Replace hard-coded USB vendor ID with macro definition.

---
 system/usb.h    | 4 ++++
 system/usbhcd.c | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/system/usb.h b/system/usb.h
index b8ca3db..942d0f2 100644
--- a/system/usb.h
+++ b/system/usb.h
@@ -87,6 +87,10 @@
 #define HUB_PORT_LOW_SPEED      0x00000200
 #define HUB_PORT_HIGH_SPEED     0x00000400
 
+// Vendor IDs
+
+#define USB_VID_AMERICAN_MEGATRENDS     0x046b
+
 // Data structures.
 
 typedef struct __attribute__((packed)) {
diff --git a/system/usbhcd.c b/system/usbhcd.c
index 7c64dad..dafd6c5 100644
--- a/system/usbhcd.c
+++ b/system/usbhcd.c
@@ -170,7 +170,7 @@ static bool build_hub_info(const usb_hcd_t *hcd, const usb_hub_t *parent, int po
 
 static void add_hub_quirks(const usb_device_desc_t *device, usb_hub_t *hub)
 {
-    if ((device->vendor_id == 0x046b) && (device->product_id == 0xff01)) {
+    if ((device->vendor_id == USB_VID_AMERICAN_MEGATRENDS) && (device->product_id == 0xff01)) {
         // add quirk for AMI Virtual Hub - see issue #523
         hub->quirks |= USB_HUB_DONT_DISABLE_PORTS;
     }