diff --git a/lib/hardware/coolstream/hd1/libcoolstream/cs_api.h b/lib/hardware/coolstream/hd1/libcoolstream/cs_api.h
index f778e149b..1051c99c0 100644
--- a/lib/hardware/coolstream/hd1/libcoolstream/cs_api.h
+++ b/lib/hardware/coolstream/hd1/libcoolstream/cs_api.h
@@ -17,6 +17,13 @@
 
 typedef void (*cs_messenger) (unsigned int msg, unsigned int data);
 
+#define CS_CHIP_APOLLO			0x8490
+#define CS_CHIP_SHINER			0x8470
+#define CS_CHIP_KRONOS_S		0x7540
+#define CS_CHIP_KRONOS_C		0x7550
+#define CS_CHIP_KRONOS_IP		0x7530
+#define CS_CHIP_NEVIS			0x0000	/* workaround for nonexistant nevis chiptype */
+
 enum CS_LOG_MODULE {
 	CS_LOG_CI	= 0,
 	CS_LOG_HDMI_CEC,
@@ -71,6 +78,29 @@ int cs_get_tsp_config(unsigned int port, tsrouter_tsp_config_t *tsp_config);
 // Serial nr and revision accessors
 unsigned long long cs_get_serial(void);
 unsigned int cs_get_revision(void);
+/* Dummy function for compatibility with hd2 */
+unsigned int cs_get_chip_type(void);
 
 
+// library version functions
+typedef struct cs_libversion_t
+{
+    int    vMajor;
+    int    vMinor;
+    int    vPatch;
+    char   vStr[16];
+    char   vGit[41];
+    char   vGitDescribe[64];
+    time_t vGitTime;
+} cs_libversion_struct_t;
+
+void cs_get_lib_version(cs_libversion_t *ver);
+
+/* return value:
+   -------------
+   1 Library version newer than given version
+   0 library version equals given version
+  -1 Library version older than given version */
+int  cs_compare_lib_versions(int Major, int Minor, int Patch);
+
 #endif //__CS_API_H_