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