diff --git a/include/uapi/linux/sdla.h b/include/uapi/linux/sdla.h
new file mode 100644
index 0000000..95eaff9
--- /dev/null
+++ b/include/uapi/linux/sdla.h
@@ -0,0 +1,116 @@
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		Global definitions for the Frame relay interface.
+ *
+ * Version:	@(#)if_ifrad.h	0.20	13 Apr 96
+ *
+ * Author:	Mike McLagan <mike.mclagan@linux.org>
+ *
+ * Changes:
+ *		0.15	Mike McLagan	Structure packing
+ *
+ *		0.20	Mike McLagan	New flags for S508 buffer handling
+ *
+ *		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.
+ */
+
+#ifndef _UAPISDLA_H
+#define _UAPISDLA_H
+
+/* adapter type */
+#define SDLA_TYPES
+#define SDLA_S502A			5020
+#define SDLA_S502E			5021
+#define SDLA_S503			5030
+#define SDLA_S507			5070
+#define SDLA_S508			5080
+#define SDLA_S509			5090
+#define SDLA_UNKNOWN			-1
+
+/* port selection flags for the S508 */
+#define SDLA_S508_PORT_V35		0x00
+#define SDLA_S508_PORT_RS232		0x02
+
+/* Z80 CPU speeds */
+#define SDLA_CPU_3M			0x00
+#define SDLA_CPU_5M			0x01
+#define SDLA_CPU_7M			0x02
+#define SDLA_CPU_8M			0x03
+#define SDLA_CPU_10M			0x04
+#define SDLA_CPU_16M			0x05
+#define SDLA_CPU_12M			0x06
+
+/* some private IOCTLs */
+#define SDLA_IDENTIFY			(FRAD_LAST_IOCTL + 1)
+#define SDLA_CPUSPEED			(FRAD_LAST_IOCTL + 2)
+#define SDLA_PROTOCOL			(FRAD_LAST_IOCTL + 3)
+
+#define SDLA_CLEARMEM			(FRAD_LAST_IOCTL + 4)
+#define SDLA_WRITEMEM			(FRAD_LAST_IOCTL + 5)
+#define SDLA_READMEM			(FRAD_LAST_IOCTL + 6)
+
+struct sdla_mem {
+   int  addr;
+   int  len;
+   void __user *data;
+};
+
+#define SDLA_START			(FRAD_LAST_IOCTL + 7)
+#define SDLA_STOP			(FRAD_LAST_IOCTL + 8)
+
+/* some offsets in the Z80's memory space */
+#define SDLA_NMIADDR			0x0000
+#define SDLA_CONF_ADDR			0x0010
+#define SDLA_S502A_NMIADDR		0x0066
+#define SDLA_CODE_BASEADDR		0x0100
+#define SDLA_WINDOW_SIZE		0x2000
+#define SDLA_ADDR_MASK			0x1FFF
+
+/* largest handleable block of data */
+#define SDLA_MAX_DATA			4080
+#define SDLA_MAX_MTU			4072	/* MAX_DATA - sizeof(fradhdr) */
+#define SDLA_MAX_DLCI			24
+
+/* this should be the same as frad_conf */
+struct sdla_conf {
+   short station;
+   short config;
+   short kbaud;
+   short clocking;
+   short max_frm;
+   short T391;
+   short T392;
+   short N391;
+   short N392;
+   short N393;
+   short CIR_fwd;
+   short Bc_fwd;
+   short Be_fwd;
+   short CIR_bwd;
+   short Bc_bwd;
+   short Be_bwd;
+};
+
+/* this should be the same as dlci_conf */
+struct sdla_dlci_conf {
+   short config;
+   short CIR_fwd;
+   short Bc_fwd;
+   short Be_fwd;
+   short CIR_bwd;
+   short Bc_bwd;
+   short Be_bwd; 
+   short Tc_fwd;
+   short Tc_bwd;
+   short Tf_max;
+   short Tb_max;
+};
+
+
+#endif /* _UAPISDLA_H */