sys: transceiver: Provide an adapter to netapi module

Since netapi is aimed to replace tranceiver one day, but porting
efforts usally take a while, this commit aims to provide access via
transceiver as we are used to for radio/network drivers that already implement
netapi (e. g. uart_net in RIOT-OS#1454).

Author: Martin Lenders

Makefile.dep

@@ -60,7 +60,6 @@ endif
 
 ifneq (,$(filter cc2420,$(USEMODULE)))
 	USEMODULE += netdev_802154
-	USEMODULE += transceiver
 	USEMODULE += ieee802154
 endif
 

sys/include/transceiver.h

@@ -133,6 +133,7 @@
 #define TRANSCEIVER_MC1322X     (0x08)      ///< MC1322X transceivers
 #define TRANSCEIVER_NATIVE      (0x10)      ///< NATIVE transceivers
 #define TRANSCEIVER_AT86RF231   (0x20)      ///< AT86RF231 transceivers
+#define TRANSCEIVER_NETAPI      (0x30)      ///< netapi compatible L* layers
 
 /**
  * @brief Data type for transceiver specification
@@ -146,6 +147,10 @@ typedef uint64_t transceiver_eui64_t;
 
 /**
  * @brief Message types for transceiver interface
+ *
+ * @note    **ATTENTION:** Packages received from a netapi layer are neither
+ *          of type radio_packet_t nor ieee802154_packet_t as they normally are
+ *          (depending on the radio), but netapi_rcv_pkt_t!
  */
 enum transceiver_msg_type_t {
     /* Message types for driver <-> transceiver communication */

sys/net/include/netapi.h

@@ -261,6 +261,22 @@ typedef struct {
 } netapi_reg_t;
 
 
+#ifdef MODULE_TRANSCEIVER
+/**
+ * @brief PID for a netapi layer, when used with the transceiver module.
+ *
+ * @detail  This variable is only needed, iff this definitions are used with
+ *          the transceiver module in legacy applications. Needs to be set
+ *          externaly (e. g. the layer, that uses netapi). Guard it against
+ *          other layers using netapi with the transceiver with
+ *          the macro `HAS_NETAPI_PID`, the transceiver module will check
+ *          if it is there and only than allow adapter capabilities. Since
+ *          only one netapi layer can be used with this hack, it is
+ *          advised to let only layers below network layer use this.
+ */
+extern kernel_pid_t netapi_pid;
+#endif  /* MODULE_TRANSCEIVER */
+
 #ifdef MODULE_NETAPI /* Only include if module netapi is compiled */
 /**
  * @brief Sends a command to a protocol's control thread.

sys/transceiver/Makefile

@@ -1,13 +1,3 @@
-ifneq (,$(filter cc2420,$(USEMODULE)))
-	INCLUDES += -I$(RIOTBASE)/sys/net/include
-endif
-
-ifneq (,$(filter at86rf231,$(USEMODULE)))
-	INCLUDES += -I$(RIOTBASE)/sys/net/include
-endif
-
-ifneq (,$(filter mc1322x,$(USEMODULE)))
-	INCLUDES += -I$(RIOTBASE)/sys/net/include
-endif
+INCLUDES += -I$(RIOTBASE)/sys/net/include
 
 include $(RIOTBASE)/Makefile.base