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authormb <mb@3c298f89-4303-0410-b956-a3cf2f4a3e73>2009-03-17 19:34:45 +0000
committermb <mb@3c298f89-4303-0410-b956-a3cf2f4a3e73>2009-03-17 19:34:45 +0000
commitd8a99a038c06178cb1d08b3f96912cfc4d853236 (patch)
treebcfb9ca0ba6b41039bb0dd198e28c29456afe5f1
parent2b9603a905b704ed92dbb0ad3a18c8dc54f917a8 (diff)
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
-rw-r--r--package/mac80211/Config.in44
-rw-r--r--package/mac80211/Makefile4
-rwxr-xr-xpackage/mac80211/files/host_bin/b43-fwsquash.py100
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)
+