new subclass,protocol IDs for vendor itf

host/dpctl/connection.py

@@ -26,8 +26,8 @@ class DevConn:
 class UsbConn(DevConn):
     _USB_DEFAULT_VID = 0xcafe
     _USB_DEFAULT_PID = 0x1312
-    _SUBCLASS = 42
-    _PROTOCOL = 69
+    _SUBCLASS = ord('D')
+    _PROTOCOL = ord('P')
     def _open_dev(dev) -> Union[UsbConn, str]:
         import usb, usb.core
 

host/i2c-tiny-usb-misc/i2c-tiny-usb.c

@@ -162,7 +162,7 @@ static const struct usb_device_id i2c_tiny_usb_table[] = {
 	{ USB_DEVICE(0x1c40, 0x0534) },   /* EZPrototypes */
 	{ /* Dragon Probe: we want the Vendor interface on I2C-enabled ones */
 	  .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION | USB_DEVICE_ID_MATCH_INT_CLASS,
-	  .idVendor = 0xcafe, .idProduct = 0x1312,
+	  .idVendor = 0xcafe, .idProduct = 0x1312, /* TODO: match subclass & protocol */
 	  .bcdDevice_lo = 0x6000, .bcdDevice_hi = 0x6fff,
 	  .bInterfaceClass = 0
 	},

host/modules/dragonprobe.c

@@ -571,7 +571,7 @@ static int dp_resume(struct usb_interface *itf)
 }
 
 static const struct usb_device_id dp_table[] = {
-	{ USB_DEVICE_AND_INTERFACE_INFO(0xcafe, 0x1312, USB_CLASS_VENDOR_SPEC, 42, 69) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(0xcafe, 0x1312, USB_CLASS_VENDOR_SPEC, 'D', 'P') },
 	{ }
 };
 MODULE_DEVICE_TABLE(usb, dp_table);

src/vnd_cfg.h

@@ -7,8 +7,8 @@
 
 /* the configuration vendor interface has a specific subclass and protocol
  * number that can be useful for identification */
-#define VND_CFG_SUBCLASS 42
-#define VND_CFG_PROTOCOL 69
+#define VND_CFG_SUBCLASS 'D'
+#define VND_CFG_PROTOCOL 'P'
 #define TUD_VENDOR_DESCRIPTOR_EX(_itfnum, _stridx, _epout, _epin, _epsize, _subclass, _protocol) \
   /* Interface */\
   9, TUSB_DESC_INTERFACE, _itfnum, 0, 2, TUSB_CLASS_VENDOR_SPECIFIC, _subclass, _protocol, _stridx,\