zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/boot/common/src/uboot/downloader/cmd_testusb.c b/boot/common/src/uboot/downloader/cmd_testusb.c
new file mode 100644
index 0000000..921a66d
--- /dev/null
+++ b/boot/common/src/uboot/downloader/cmd_testusb.c
@@ -0,0 +1,73 @@
+/*******************************************************************************
+ * Copyright (C) 2016, ZIXC Corporation.
+ *
+ * File Name:cmd_testusb.c
+ * File Mark:
+ * Description:
+ * Others:
+ * Version:       1.0
+ * Author:        zangxiaofeng
+ * Date:          2013-4-22
+ * History 1:
+ *     Date:
+ *     Version:
+ *     Author:
+ *     Modification:
+ * History 2:
+  ********************************************************************************/
+
+
+/****************************************************************************
+* 	                                     Include files
+****************************************************************************/
+#include <common.h>
+#include <command.h>
+#include <net.h>
+#include <jffs2/load_kernel.h>
+#include "downloader_nand.h"
+#include "downloader_config.h"
+#include "errno.h"
+/****************************************************************************
+*							Global Function Prototypes
+****************************************************************************/
+extern int downloader_serial_write(const char * buffer,unsigned int len);
+extern int downloader_serial_read_actuallen(char * buffer,unsigned int len);
+
+/*******************************************************************************
+ * Function:do_reboot
+ * Description:
+ * Parameters:
+ *	 Input:
+ *
+ *	 Output:
+ *
+ * Returns:
+ *
+ *
+ * Others:
+ ********************************************************************************/
+int do_testusb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+    unsigned int size = 0;
+    char ack[64] = {0};
+    
+    if(argc < 2)
+    {
+        return cmd_usage(cmdtp);
+    }
+    size = (unsigned int)simple_strtoul (argv[1], NULL, 16);
+
+    sprintf(ack,"DATA %x",size);
+    downloader_serial_write(ack, strlen(ack)+1);
+    downloader_serial_read_actuallen((char *)DOWNLOADER_BUFFER_BASE, size); 
+    sprintf(ack,"OKAY");
+    downloader_serial_write(ack, strlen(ack)+1);
+    return 0;
+}
+
+U_BOOT_CMD(
+	testusb, CONFIG_SYS_MAXARGS, 0, do_testusb,
+	"testusb: testusb [size]",
+	""
+);
+