diff --git a/common/cmd_dataflash_mmc_mux.c b/common/cmd_dataflash_mmc_mux.c
new file mode 100644
index 0000000..4b2cf1c
--- /dev/null
+++ b/common/cmd_dataflash_mmc_mux.c
@@ -0,0 +1,65 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+
+static int mmc_nspi (const char *);
+
+int do_dataflash_mmc_mux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	switch (argc) {
+	case 2:			/* on / off	*/
+		switch (mmc_nspi (argv[1])) {
+		case 0:	AT91F_SelectSPI ();
+			break;
+		case 1:	AT91F_SelectMMC ();
+			break;
+		}
+	case 1:			/* get status */
+		printf ("Mux is configured to be %s\n",
+			AT91F_GetMuxStatus () ? "MMC" : "SPI");
+		return 0;
+	default:
+		printf ("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+	return 0;
+}
+
+static int mmc_nspi (const char *s)
+{
+	if (strcmp (s, "mmc") == 0) {
+		return 1;
+	} else if (strcmp (s, "spi") == 0) {
+		return 0;
+	}
+	return -1;
+}
+
+U_BOOT_CMD(
+	dataflash_mmc_mux, 2, 1, do_dataflash_mmc_mux,
+	"dataflash_mmc_mux\t- enable or disable MMC or SPI\n",
+	"[mmc, spi]\n"
+	"    - enable or disable MMC or SPI\n"
+);