# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1433524053 -7200
# Node ID ed647dd06e43ce41b9c69ffc204f0676b7f46a67
# Parent  25fff749a843f033423860bc06be15cf01df216c
Added some comments.

diff -r 25fff749a843 -r ed647dd06e43 include/nanonote.h
--- a/include/nanonote.h	Fri Jun 05 15:59:32 2015 +0200
+++ b/include/nanonote.h	Fri Jun 05 19:07:33 2015 +0200
@@ -15,6 +15,7 @@
 
 /*
  * GPIO definition
+ * See: http://en.qi-hardware.com/wiki/Hardware_basics
  */
 #define GPIO_LCD_CS	(2 * 32 + 21)
 #define GPIO_AMP_EN	(3 * 32 + 4)
diff -r 25fff749a843 -r ed647dd06e43 stage1.c
--- a/stage1.c	Fri Jun 05 15:59:32 2015 +0200
+++ b/stage1.c	Fri Jun 05 19:07:33 2015 +0200
@@ -21,6 +21,10 @@
 #include "jz4740.h"
 #include "board-nanonote.h"
 #include "usb_boot_defines.h"
+#include "nanonote.h"
+
+/* These arguments are initialised by usbboot and are defined in...
+   /etc/xburst-tools/usbboot.cfg. */
 
 struct fw_args *fw_args;
 volatile u32 CPU_ID;
@@ -38,7 +42,9 @@
 
 void load_args(void)
 {
-        fw_args = (struct fw_args *)0x80002008; /* get the fw args from memory */
+	/* Get the fw args from memory. See head.S for the memory layout. */
+
+        fw_args = (struct fw_args *)0x80002008;
         CPU_ID = fw_args->cpu_id ;
         CFG_EXTAL = (u32)fw_args->ext_clk * 1000000;
         CFG_CPU_SPEED = (u32)fw_args->cpu_speed * CFG_EXTAL ;