diff --git a/loader/Include/loader.h b/loader/Include/loader.h
index 0e5788c29..da17c476d 100755
--- a/loader/Include/loader.h
+++ b/loader/Include/loader.h
@@ -91,6 +91,7 @@ extern void loader_setRecoveryPartitionID(UINT32 partition_id);
 extern void loader_setVersion(UINT32 version);
 extern void loader_setStorageIntType(STORAGEINT type, PSTORAGE_OBJ strg_obj);
 extern void loader_installSpecialKeyCB(LDR_SPECIAL_KEY_CB callback);
+extern void loader_installsfSpecialKeyCB(LDR_SPECIAL_KEY_CB callback);
 extern void loader_installCardDetectCB(LDR_CARD_DETECT_CB callback);
 extern void loader_installRecoveryTriggerCB(LDR_RECOVERY_TRIGGER_CB callback);
 extern void loader_installFastbootKeyCB(LDR_FASTBOOT_KEY_CB callback);
diff --git a/loader/LibExt/LIBExt_src/Ctrl_Flow/bl_func.c b/loader/LibExt/LIBExt_src/Ctrl_Flow/bl_func.c
index 70461ad8b..dc1caff95 100755
--- a/loader/LibExt/LIBExt_src/Ctrl_Flow/bl_func.c
+++ b/loader/LibExt/LIBExt_src/Ctrl_Flow/bl_func.c
@@ -108,6 +108,7 @@ static LDR_FASTBOOT_KEY_CB gFastbootKeyCallBack = NULL;
 static LDR_SPECIAL_KEY_CB gSpecialKeyCallBack = NULL;
 static LDR_CARD_DETECT_CB gCardDetectCallBack = NULL;
 static STORAGEINT gStorageIntType = STORAGEINT_UNOKNOWN;
+static LDR_SPECIAL_KEY_CB gsfSpecialKeyCallBack = NULL;
 
 static LDR_RECOVERY_TRIGGER_CB gRecoveryTriggerCallBack = NULL;
 //#if (!USB_WRITELOADER)
@@ -675,7 +676,7 @@ static void bl_cpu_timer_init(UINT32 value)
 #endif
 _THUMB2 int bl_flash_open(void)
 {
-	int er;
+	int er = -1;
 	//UINT32  uiStorageVersion = (UINT32)&_load_nand_table_start_base;
 
 	if (g_is_flash_open) {
@@ -770,10 +771,15 @@ _THUMB2 static const void *bl_get_fdt_nvt_memory_cfg_property(const void *p_dtb,
 	}
 
 	nodeoffset = fdt_subnode_offset(p_dtb, nodeoffset_nvt_memory_cfg, &p_path[16]);
+    //debug_msg_var("nodeoffset_nvt_memory_cfg", nodeoffset_nvt_memory_cfg);
+    //debug_msg_var("nodeoffset", nodeoffset);
+
 	if (nodeoffset < 0) {
 		return NULL;
 	}
 	nodep = fdt_getprop(p_dtb, nodeoffset, p_property, len);
+    //debug_msg_var("len", *len);
+
 	if (len == 0) {
 		return NULL;
 	}
@@ -2014,7 +2020,7 @@ _THUMB2 static int bl_load_uboot_from_flash(unsigned char *p_fdt, unsigned char
 //		//============Sifar==============///Payton
 //
 //	} UIMenuStoreInfo;
-
+#if 1
 	_THUMB2 static void *bl_get_sys_partition(unsigned char *p_fdt /*IN*/, int *p_id /*OUT*/)
 	{
 	#if (FDT_SUPPORT)
@@ -2099,7 +2105,7 @@ _THUMB2 static int bl_load_uboot_from_flash(unsigned char *p_fdt, unsigned char
 
 		return (*ota_flag);
 	}
-
+#endif
 	/***********************************************************************************/
 
 _THUMB2 static int bl_load_rtos_from_flash(unsigned char *p_fdt, unsigned char *p_tmp)
@@ -3206,7 +3212,11 @@ _THUMB2 UINT32 bl_mainFlow(void)
 #endif
 	}
 
-	UINT32 ota_flag = bl_check_ota_flag();
+	UINT32 ota_flag = 0;
+    if(gsfSpecialKeyCallBack(0))
+    {
+        ota_flag = bl_check_ota_flag();
+    }
 
 #if !(USB_WRITELOADER || UART_UPDATE)
 	if (bl_load_rtos_from_uart(uiUpdateMainBinBufAddr, FAT_READ_TOTAL_FILE_LENGTH, &adjusted_addr, &adjusted_size) == 0) {
@@ -3620,7 +3630,10 @@ _THUMB2 void loader_installSpecialKeyCB(LDR_SPECIAL_KEY_CB callback)
 {
 	gSpecialKeyCallBack = callback;
 }
-
+_THUMB2 void loader_installsfSpecialKeyCB(LDR_SPECIAL_KEY_CB callback)
+{
+	gsfSpecialKeyCallBack = callback;
+}
 _THUMB2 void loader_installCardDetectCB(LDR_CARD_DETECT_CB callback)
 {
 	gCardDetectCallBack = callback;
diff --git a/loader/Project/Model/Src/prj_main.c b/loader/Project/Model/Src/prj_main.c
index 9873222fb..167593713 100755
--- a/loader/Project/Model/Src/prj_main.c
+++ b/loader/Project/Model/Src/prj_main.c
@@ -163,6 +163,23 @@ static BOOL prj_isSpecialKeyPressed(UINT32 ota_flag)
 	}
 	//return TRUE;
 }
+static BOOL prj_issfSpecialKeyPressed(UINT32 ota_flag)
+{
+
+    #if (MODEL == MODEL_S530)
+    if ((!gpio_getPin(GPIO_SPECIAL_KEY)) && (gpio_getPin(GPIO_SPECIAL_USB)))
+    #elif (MODEL == MODEL_S550)
+    if ((gpio_getPin(GPIO_SPECIAL_KEY)) && (gpio_getPin(GPIO_SPECIAL_USB)))
+    #endif
+    {
+        return TRUE;
+    }
+    else
+    {
+        return FALSE;
+    }
+	//return TRUE;
+}
 #endif
 
 #if (FASTBOOT_KEY == ENABLE)
@@ -254,6 +271,7 @@ _THUMB2 void prj_main(void)
 
 #if (SPECIAL_KEY_UPDATE == ENABLE)
 	loader_installSpecialKeyCB(prj_isSpecialKeyPressed);
+	loader_installsfSpecialKeyCB(prj_issfSpecialKeyPressed);
 #endif
 
 #if (CHECK_CARD_EXIST == ENABLE)