From e36d5009ba83ff126a989b04618367c8139ae00b Mon Sep 17 00:00:00 2001
From: Matthias Ringwald <matthias@ringwald.ch>
Date: Fri, 31 Jan 2025 11:24:07 +0100
Subject: [PATCH] btstack_chipset_bcm: add
 btstack_chipset_bcm_identify_controller

---
 chipset/bcm/btstack_chipset_bcm.c | 24 ++++++++++++++++++++++++
 chipset/bcm/btstack_chipset_bcm.h | 11 +++++++++++
 2 files changed, 35 insertions(+)

diff --git a/chipset/bcm/btstack_chipset_bcm.c b/chipset/bcm/btstack_chipset_bcm.c
index 09e34610d..f59fac85e 100644
--- a/chipset/bcm/btstack_chipset_bcm.c
+++ b/chipset/bcm/btstack_chipset_bcm.c
@@ -285,3 +285,27 @@ void btstack_chipset_bcm_enable_init_script(int enabled){
         btstack_chipset_bcm.next_command = NULL;
     }
 }
+
+// Other lmp_subversion values:
+// 0x220c - CYW20819
+// 0x420e - CYW20719
+const char * btstack_chipset_bcm_identify_controller(uint16_t lmp_subversion) {
+    const char * device_name = NULL;
+    switch (lmp_subversion){
+        case 0x220b:
+            // CYW20706
+            device_name = "BCM20703A2";
+            break;
+        case 0x2220:
+            // CYW5551x
+            device_name = "CYW55500A1";
+        break;
+        case 0x2257:
+            // CYW5557x
+            device_name = "CYW55560A1";
+            break;
+        default:
+            break;
+    }
+    return device_name;
+}
diff --git a/chipset/bcm/btstack_chipset_bcm.h b/chipset/bcm/btstack_chipset_bcm.h
index d0f15d60b..9326c5bc2 100644
--- a/chipset/bcm/btstack_chipset_bcm.h
+++ b/chipset/bcm/btstack_chipset_bcm.h
@@ -79,6 +79,17 @@ void btstack_chipset_bcm_set_device_name(const char * path);
  */
 void btstack_chipset_bcm_enable_init_script(int enabled);
 
+/**
+ * @Brief Identify Broadcom/Cypress/Infineon chipset by lmp_subversion
+ * If identified, device name is returned and can be used for HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION
+ *
+ * @note Required for newer Controllers that require AIROC Download Mode for PatchRAM Upload
+ *
+ * @param lmp_subversion
+ * @returns device name if identified, otherwise NULL
+ */
+const char * btstack_chipset_bcm_identify_controller(uint16_t lmp_subversion);
+
 #if defined __cplusplus
 }
 #endif