added unique layer skeleton

Makefile

@@ -3,10 +3,10 @@
 DRIVER = spike
 
 TARGET = cc2520
-OBJS = radio.o interface.o module.o platform.o sack.o lpl.o packet.o csma.o
+OBJS = radio.o interface.o module.o platform.o sack.o lpl.o packet.o csma.o unique.o
 
 obj-m += $(TARGET).o
-cc2520-objs = radio.o interface.o module.o platform.o sack.o lpl.o packet.o csma.o
+cc2520-objs = radio.o interface.o module.o platform.o sack.o lpl.o packet.o csma.o unique.o
 
 # Set this is your linux kernel checkout.
 KDIR := /home/androbin/rpi/linux

module.c

@@ -16,14 +16,16 @@
 #include "interface.h"
 #include "sack.h"
 #include "csma.h"
+#include "unique.h"
 
 #define DRIVER_AUTHOR "Andrew Robinson <[email protected]>"
 #define DRIVER_DESC   "A driver for the CC2520 radio. Be afraid."
 
 struct cc2520_state state;
 const char cc2520_name[] = "cc2520";
 
-struct cc2520_interface interface_to_lpl;
+struct cc2520_interface interface_to_unique;
+struct cc2520_interface unique_to_lpl;
 struct cc2520_interface lpl_to_csma;
 struct cc2520_interface csma_to_sack;
 struct cc2520_interface sack_to_radio;
@@ -36,8 +38,10 @@ void setup_bindings(void)
 	csma_bottom = &csma_to_sack;
 	csma_top = &lpl_to_csma;
 	lpl_bottom = &lpl_to_csma;
-	lpl_top = &interface_to_lpl;
-	interface_bottom = &interface_to_lpl;
+	lpl_top = &unique_to_lpl;
+	unique_bottom = &unique_to_lpl;
+	unique_top = &interface_to_unique;
+	interface_bottom = &interface_to_unique;
 }
 
 int init_module()
@@ -92,10 +96,18 @@ int init_module()
 		goto error1;
 	}
 
+	err = cc2520_unique_init();
+	if (err) {
+		ERR((KERN_ALERT "[cc2520] - unique init error. aborting.\n"));
+		goto error0;
+	}
+
 	state.wq = create_singlethread_workqueue(cc2520_name);
 
 	return 0;
 
+	error0:
+		cc2520_csma_free();
 	error1:
 		cc2520_sack_free();
 	error2:

unique.c

@@ -0,0 +1,44 @@
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/hrtimer.h>
+
+#include "unique.h"
+#include "packet.h"
+#include "cc2520.h"
+
+struct cc2520_interface *unique_top;
+struct cc2520_interface *unique_bottom;
+
+static int cc2520_unique_tx(u8 * buf, u8 len);
+static void cc2520_unique_tx_done(u8 status);
+static void cc2520_unique_rx_done(u8 *buf, u8 len);
+
+int cc2520_unique_init()
+{
+	unique_top->tx = cc2520_unique_tx;
+	unique_bottom->tx_done = cc2520_unique_tx_done;
+	unique_bottom->rx_done = cc2520_unique_rx_done;
+
+	return 0;
+}
+
+void cc2520_unique_free()
+{
+
+}
+
+static int cc2520_unique_tx(u8 * buf, u8 len)
+{
+	return unique_bottom->tx(buf, len);
+}
+
+static void cc2520_unique_tx_done(u8 status)
+{
+	unique_top->tx_done(status);
+}
+
+static void cc2520_unique_rx_done(u8 *buf, u8 len)
+{
+	unique_top->rx_done(buf, len);
+}

unique.h

@@ -0,0 +1,12 @@
+#ifndef UNIQUE_H
+#define UNIQUE_H
+
+#include "cc2520.h"
+
+extern struct cc2520_interface *unique_top;
+extern struct cc2520_interface *unique_bottom;
+
+int cc2520_unique_init(void);
+void cc2520_unique_free(void);
+
+#endif