b43: Add support for removing unnecessary firmware files to reduce the image size.
authorMichael Büsch <mb@bu3sch.de>
Tue, 17 Mar 2009 19:34:45 +0000 (19:34 +0000)
committerMichael Büsch <mb@bu3sch.de>
Tue, 17 Mar 2009 19:34:45 +0000 (19:34 +0000)
SVN-Revision: 14929

package/mac80211/Config.in
package/mac80211/Makefile
package/mac80211/files/host_bin/b43-fwsquash.py [new file with mode: 0755]

index f3eb5ec..0eda184 100644 (file)
@@ -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
+
index 8fadab8..b3b73fb 100644 (file)
@@ -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 (executable)
index 0000000..52484d1
--- /dev/null
@@ -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)
+