b43: Add support for removing unnecessary firmware files to reduce the image size.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@14929 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 148 insertions, 0 deletions

diff --git a/package/mac80211/Config.in b/package/mac80211/Config.in
index f3eb5ec3cf..0eda184019 100644
--- a/package/mac80211/Config.in
+++ b/package/mac80211/Config.in
@@ -17,3 +17,47 @@ config B43_OPENFIRMWARE
 	bool "Open FirmWare for WiFi networks"
 
 endchoice
+
+config B43_FW_SQUASH
+	bool "Remove unnecessary firmware files"
+	depends on PACKAGE_kmod-b43 && !B43_OPENFIRMWARE
+	help
+	  This options allows you to remove unnecessary b43 firmware files
+	  from the final rootfs image. This can reduce the rootfs size by
+	  up to 200k.
+
+	  Do _NOT_ use this option, if you don't know the core revision
+	  and/or PHY type of your wireless chip.
+
+	  If unsure, say N.
+
+config B43_FW_SQUASH_COREREVS
+	string "Core revisions to include"
+	depends on PACKAGE_kmod-b43
+	depends on B43_FW_SQUASH
+	default "5,6,7,8,9,10"
+	help
+	  This is a comma seperated list of core revision numbers.
+	  Example (keep files for rev5 only):
+	         5
+	  Example (keep files for rev5 and rev11):
+	         5,11
+
+config B43_FW_SQUASH_PHYTYPES
+	string "PHY types to include"
+	depends on PACKAGE_kmod-b43
+	depends on B43_FW_SQUASH
+	default "G,LP,N"
+	help
+	  This is a comma seperated list of PHY types:
+	  A         => A-PHY
+	  AG        => Dual A-PHY G-PHY
+	  G         => G-PHY
+	  LP        => LP-PHY
+	  N         => N-PHY
+
+	  Example (keep files for G-PHY only):
+	         G
+	  Example (keep files for G-PHY and N-PHY):
+	         G,N
+
diff --git a/package/mac80211/Makefile b/package/mac80211/Makefile
index 8fadab88bd..b3b73fb32d 100644
--- a/package/mac80211/Makefile
+++ b/package/mac80211/Makefile
@@ -483,6 +483,7 @@ ifneq ($(CONFIG_B43_OPENFIRMWARE),)
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/$(PKG_B43_FWCUTTER_SUBDIR)/assembler/b43-asm $(STAGING_DIR_HOST)/bin/
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/$(PKG_B43_FWCUTTER_SUBDIR)/assembler/b43-asm.bin $(STAGING_DIR_HOST)/bin/
 endif
+	$(INSTALL_BIN) ./files/host_bin/b43-fwsquash.py $(STAGING_DIR_HOST)/bin/
 endef
 
 define KernelPackage/b43/install
@@ -503,6 +504,9 @@ ifneq ($(CONFIG_B43_OPENFIRMWARE),)
 else
 	b43-fwcutter --unsupported -w $(1)/lib/firmware/ $(PKG_BUILD_DIR)/$(PKG_B43_FWV4_OBJECT)
 endif
+ifneq ($(CONFIG_B43_FW_SQUASH),)
+	b43-fwsquash.py "$(CONFIG_B43_FW_SQUASH_PHYTYPES)" "$(CONFIG_B43_FW_SQUASH_COREREVS)" "$(1)/lib/firmware/b43"
+endif
 endef
 
 define KernelPackage/b43legacy/install
diff --git a/package/mac80211/files/host_bin/b43-fwsquash.py b/package/mac80211/files/host_bin/b43-fwsquash.py
new file mode 100755
index 0000000000..52484d1b19
--- /dev/null
+++ b/package/mac80211/files/host_bin/b43-fwsquash.py
@@ -0,0 +1,100 @@
+#!/usr/bin/env python
+#
+# b43 firmware file squasher
+# Removes unnecessary firmware files
+#
+# Copyright (c) 2009 Michael Buesch <mb@bu3sch.de>
+#
+# Licensed under the GNU/GPL version 2 or (at your option) any later version.
+#
+
+import sys
+import os
+
+def usage():
+	print "Usage: %s PHYTYPES COREREVS /path/to/extracted/firmware" % sys.argv[0]
+	print ""
+	print "PHYTYPES is a comma separated list of:"
+	print "A         => A-PHY"
+	print "AG        => Dual A-PHY G-PHY"
+	print "G         => G-PHY"
+	print "LP        => LP-PHY"
+	print "N         => N-PHY"
+	print ""
+	print "COREREVS is a comma separated list of core revision numbers."
+
+if len(sys.argv) != 4:
+	usage()
+	sys.exit(1)
+
+phytypes = sys.argv[1]
+corerevs = sys.argv[2]
+fwpath = sys.argv[3]
+
+phytypes = phytypes.split(',')
+try:
+	corerevs = map(lambda r: int(r), corerevs.split(','))
+except ValueError:
+	print "ERROR: \"%s\" is not a valid COREREVS string\n" % corerevs
+	usage()
+	sys.exit(1)
+
+
+fwfiles = os.listdir(fwpath)
+fwfiles = filter(lambda str: str.endswith(".fw"), fwfiles)
+if not fwfiles:
+	print "ERROR: No firmware files found in %s" % fwpath
+	sys.exit(1)
+
+required_fwfiles = []
+
+def revs_match(revs_a, revs_b):
+	for rev in revs_a:
+		if rev in revs_b:
+			return True
+	return False
+
+def phytypes_match(types_a, types_b):
+	for type in types_a:
+		type = type.strip().upper()
+		if type in types_b:
+			return True
+	return False
+
+revmapping = {
+	"ucode5.fw"		: (5,6,7,8,9,10,),
+	"ucode11.fw"		: (11,12,),
+	"ucode13.fw"		: (13,),
+	"pcm4.fw"		: (1,2,3,4,),
+	"pcm5.fw"		: (5,6,7,8,9,10,),
+}
+
+initvalmapping = {
+	"a0g1initvals5.fw"	: ( (5,6,7,8,9,10,),	("AG",), ),
+	"a0g0initvals5.fw"	: ( (5,6,7,8,9,10,),	("A", "AG",), ),
+	"b0g0initvals5.fw"	: ( (5,6,7,8,9,10,),	("G",), ),
+	"b0g0initvals13.fw"	: ( (13,),		("G",), ),
+	"n0initvals11.fw"	: ( (11,12,),		("N",), ),
+	"a0g1bsinitvals5.fw"	: ( (5,6,7,8,9,10,),	("AG",), ),
+	"a0g0bsinitvals5.fw"	: ( (5,6,7,8,9,10,),	("A", "AG"), ),
+	"b0g0bsinitvals5.fw"	: ( (5,6,7,8,9,10,),	("G",), ),
+	"n0bsinitvals11.fw"	: ( (11,12,),		("N",), ),
+}
+
+for f in fwfiles:
+	if f in revmapping:
+		if revs_match(corerevs, revmapping[f]):
+			required_fwfiles += [f]
+		continue
+	if f in initvalmapping:
+		if revs_match(corerevs, initvalmapping[f][0]) and\
+		   phytypes_match(phytypes, initvalmapping[f][1]):
+			required_fwfiles += [f]
+		continue
+	print "WARNING: Firmware file %s not found in the mapping lists" % f
+
+for f in fwfiles:
+	if f not in required_fwfiles:
+		print "Deleting %s" % f
+		os.unlink(fwpath + '/' + f)
+