1 files changed, 93 insertions, 0 deletions
diff --git a/recipes/shr/initscripts-shr/g_ether.sh b/recipes/shr/initscripts-shr/g_ether.sh
new file mode 100644
index 0000000000..9257268936
--- /dev/null
+++ b/recipes/shr/initscripts-shr/g_ether.sh
@@ -0,0 +1,93 @@
+#!/bin/sh
+
+# This script runs very early in order to ensure that the USB network comes
+# up at first system boot.  It gathers or creates the necessary host and device
+# mac addresses for the g_ether module at first boot, and writes them to the
+# /etc/modprobe.conf/g_ether.conf file.
+#
+# Due to some oddness with udev, it also modprobes g_ether, only on first boot.
+
+# If the g_ether module options file exists, nothing to do.
+
+if [ ! -e /etc/modprobe.d/g_ether.conf ] ; then
+
+# Gather up all g_ether parameters passed in on the kernel command line, and
+# make sure to pass them to the module; this will ensure similar behavior
+# between the module and built-in.
+
+# Begin by searching the command line for the host and dev addrs
+da=`sed -n -e 's|.*g_ether\.dev_addr\=\(..:..:..:..:..:..\).*|\1|p' /proc/cmdline`
+ha=`sed -n -e 's|.*g_ether\.host_addr\=\(..:..:..:..:..:..\).*|\1|p' /proc/cmdline`
+
+# If the device address is missing, try to find it some other way
+if [ -z "$da" ] ; then
+
+  if grep -q '^Hardware.*GTA02$' /proc/cpuinfo ; then
+
+    # Use the "identity" or "factory" partition on the GTA02.
+    # Ok, this is ugly.  We run before udev, so we need to rummage about in
+    # /sys to see if we have an identity partition, and create the device
+    # node if it doesn't already exist.
+    if [ ! -e /dev/mtd5ro -a -e /sys/class/mtd/mtd5ro/dev ] ; then
+      majmin=`sed -e 's|:| |' /sys/class/mtd/mtd5ro/dev`
+      mknod /dev/mtd5ro c $majmin
+    fi
+
+    # We should have the device node now.
+    if [ -e /dev/mtd5ro ] ; then
+
+      # The partition is an ext2 filesystem; we probably should mount the
+      # thing using a loopback mount and then read the correct file from it,
+      # but we're running way early in the boot; not only will that be slow,
+      # there's a good chance it may not even work (udev hasn't run yet).
+      da=`strings /dev/mtd5ro | grep ^U: | sed -n -e 's|U:\(..:..:..:..:..:..\).*|\1|p'`
+
+    fi
+
+  fi
+
+  # TODO: add code to compute a static random address for the GTA01.
+  #       For now, GTA01 owners should probably set the addresses in their
+  #       u-boot environment and pass in on the command line.  A reasonable
+  #       solution would be to the random prefix range with the last part of
+  #       the mac copied from the bluetooth device.
+
+fi
+
+# If have a device address, now we need to sort out the host address.  If it
+# is unspecified, or if it is the same as the device address (Qi does this),
+# compute a new address by just incrementing the device address.
+
+if [ -n "$da" ] ; then
+  if [ -z "$ha" -o "$da" = "$ha" ] ; then
+
+    # We need to compute a new address - split the device address into two
+    # part, and increment the second part.
+    pfx=`echo "$da" | sed -n -e 's|\(..:..:..:\)..:..:..|\1|p'`
+    i=`echo "$da" | sed -n -e 's|..:..:..:\(..\):\(..\):\(..\)|0x\1\2\3|p'`
+
+    # Now increment the mac addr
+    i=$(printf %06x $(($i+1)))
+
+    # And glue the parts back together again.
+    i=`echo "$i" | sed -n -e 's|\(..\)\(..\)\(..\)|\1:\2:\3|p'`
+
+    # Assign the computed host address, if this all worked out.
+    [ -n "$i" -a -n "$pfx" ] && ha=$pfx$i
+
+  fi
+fi
+
+# Compute the command-line options themselves
+[ -n "$da" ] && daddr="dev_addr=$da"
+[ -n "$ha" ] && haddr="host_addr=$ha"
+
+# Write the module options file out even if we have no addresses to write,
+# so that we do not need to run again at next boot.
+[ -d /etc/modprobe.d ] || mkdir /etc/modprobe.d
+echo "options g_ether $daddr $haddr" >/etc/modprobe.d/g_ether.conf
+
+# And now, since this is first boot, we need to probe the module
+modprobe g_ether 2>/dev/null || true
+
+fi