[ion] Add software version, patch level and serial number

Change-Id: I011eeb2d8596f63e0c2fdedf353d544dc8a8a202

Makefile

@@ -1,5 +1,7 @@
 include build/config.mak
 
+VERSION ?= 1.0.0
+
 ifndef USE_LIBA
   $(error platform.mak should define USE_LIBA)
 endif

ion/Makefile

@@ -1,8 +1,18 @@
+GIT := $(shell command -v git 2> /dev/null)
+PATCH_LEVEL = NONE
+ifdef GIT
+  PATCH_LEVEL = `git rev-parse HEAD`
+endif
+
+
+
 SFLAGS += -Iion/include -DKD_CONFIG_H=1
+ion/src/shared/software_version.o: SFLAGS += -DPATCH_LEVEL=$(PATCH_LEVEL) -DVERSION=$(VERSION)
 include ion/src/$(PLATFORM)/Makefile
 
 objs += $(addprefix ion/src/shared/, \
   events.o \
+  software_version.o \
 )
 
 tests += $(addprefix ion/test/,\

ion/include/ion.h

@@ -27,6 +27,8 @@ void msleep(long ms);
 void usleep(long us);
 
 const char * serialNumber();
+const char * softwareVersion();
+const char * patchLevel();
 
 /* CAUTION: This is a complete reset! */
 void reset();

ion/src/device/device.cpp

@@ -74,7 +74,7 @@ const char * Ion::serialNumber() {
   static char serialNumber[25] = {0};
   if (serialNumber[0] == 0) {
     uint8_t * rawUniqueID = (uint8_t *)0x1FFF7A10;
-    for (int i=0; i<24; i++) {
+    for (int i=0; i<12; i++) {
       uint8_t d = *rawUniqueID++;
       serialNumber[2*i] = hex(d & 0xF);
       serialNumber[2*i+1] = hex(d >> 4);

ion/src/shared/software_version.cpp

@@ -0,0 +1,20 @@
+#include <ion.h>
+
+#define STR_EXPAND(arg) #arg
+#define STR(arg) STR_EXPAND(arg)
+
+#ifndef PATCH_LEVEL
+#error This file expects PATCH_LEVEL to be defined
+#endif
+
+const char * Ion::softwareVersion() {
+  return STR(VERSION);
+}
+
+const char * Ion::patchLevel() {
+  static char patchLevel[20] = {0};
+  if (patchLevel[0] == 0) {
+    strlcpy(patchLevel, STR(PATCH_LEVEL), 6+1);
+  }
+  return patchLevel;
+}

ion/src/simulator/init.cpp

@@ -81,3 +81,7 @@ void Ion::msleep(long ms) {
     }
   }
 }
+
+const char * Ion::serialNumber() {
+  return "Simulator";
+}