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

SVN-Revision: 14929
This commit is contained in:
Michael Büsch 2009-03-17 19:34:45 +00:00
parent 56bf010d4c
commit 48a5ed9bb8
3 changed files with 148 additions and 0 deletions

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@ -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

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@ -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

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@ -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)