From 8bac68db84ccbf4f9fbd0d6075b6a1b0253c081a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Antonio=20V=C3=A1zquez=20Blanco?=
 <antoniovazquezblanco@gmail.com>
Date: Wed, 11 Oct 2023 10:15:52 +0200
Subject: [PATCH] Add historical EP compatibility to bth class

---
 src/class/bth/bth_device.c | 2 +-
 src/class/bth/bth_device.h | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/class/bth/bth_device.c b/src/class/bth/bth_device.c
index c5c74d26ab..be36e8c110 100755
--- a/src/class/bth/bth_device.c
+++ b/src/class/bth/bth_device.c
@@ -204,7 +204,7 @@ bool btd_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t c
         request->bmRequestType_bit.recipient == TUSB_REQ_RCPT_DEVICE)
     {
       // HCI command packet addressing for single function Primary Controllers
-      TU_VERIFY(request->bRequest == 0 && request->wValue == 0 && request->wIndex == 0);
+      TU_VERIFY((CFG_TUD_BTH_HISTORICAL_COMPAT && request->bRequest == 0xe0) || (request->bRequest == 0 && request->wValue == 0 && request->wIndex == 0));
     }
     else if (request->bmRequestType_bit.recipient == TUSB_REQ_RCPT_INTERFACE)
     {
diff --git a/src/class/bth/bth_device.h b/src/class/bth/bth_device.h
index 921bd7a1a8..c23e74bfbd 100755
--- a/src/class/bth/bth_device.h
+++ b/src/class/bth/bth_device.h
@@ -39,6 +39,13 @@
 #ifndef CFG_TUD_BTH_DATA_EPSIZE
 #define CFG_TUD_BTH_DATA_EPSIZE      64
 #endif
+#ifndef CFG_TUD_BTH_HISTORICAL_COMPAT
+#define CFG_TUD_BTH_HISTORICAL_COMPAT 0
+#endif
+#ifndef CFG_TUD_BTH_ISO_ALT_COUNT
+// See Bluetooth Core v5.3, Vol. 4, Part B, Section 2.1
+#error You must tell the driver the number of ISO endpoints to use
+#endif
 
 typedef struct TU_ATTR_PACKED
 {