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+Go back --> [[en/users/Drivers/ath9k|Main ath9k driver page]]
+===== initvals-tool =====
+The initvals-tool is a userspace application used to:
+  * Get checksums of the initvals for the ath9k_hw driver
+  * Get checksums of the initvals for the Atheros HAL initvals
+  * Reformat initval file output
+  * Synch the initvals from the Atheros HAL to ath9k_hw format
+===== Current checksums =====
+The current set of checksums for the latest updated initvals on the Linux kernel are available and visible on the [[en/users/Drivers/ath9k_hw/initvals-tool/latest-checksums|ath9k_hw latest initvals checksums page]].
+===== Get the initvals-tool code =====
+There's a git tree:
+<code>git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/initvals-tool.git</code>
+===== Hardware families supported =====
+These are the hardware families supported:
+    * ar5008
+    * ar9001
+    * ar9002
+    * ar9003
+    * ar9485
+    * ar9580
+===== Checksumming initvals =====
+Say you want to make some silly patch to the initvals and want to ensure you haven't broken the initvals. An easy way to verify the initvals keep their integrity is to compute a checksum of the initval arrays. A checksum will be computed for every array.
+By default the checksums for all arrays for all hardware families will be computed. You can however specify the specific hardware family you want checksums for by using the -f flag.
+Examples:
+<code># Get the checksums for all arrays for al hardware families
+./initvals
+# Only get checksums for the AR9002 family
+./initvals -f ar9002
+# Only get checksums for the AR9003 2p0 family
+./initvals -f ar9003-2p0
+# Only get checksums for the AR9003 2p2 family
+./initvals -f ar9003-2p2
+# Only get the checksums for the AR9485 family
+./initvals -f ar9485
+# Only get the checksusms for the AR9580 1p0 family
+./initvals -f ar9580-1p0</code>
+Now, suppose you want to make some changes to the AR9003 initvals style, you would read the documentation below about how to do that and then you can do something like:
+<code># First get your old checksums
+./initvals -f ar9003-2p2 | sha1sum
+# Use your new shiny modified print routine
+./initvals -w -f ar9003-2p2 > ar9003_initvals.h
+# Only get checksums for the AR9003 family, if you get
+# the same sha1sum then the newly generated initvals
+# contain the same data as the old one
+./initvals -f ar9003-2p2 | sha1sum</code>
+You can also compare the initvals against the Atheros HAL by compiling with 'make ATHEROS=1' and then checking the checksums against the ath9k ones.
+<code># get the ath9k checksums for ar9003
+make clean
+make
+./initvals -f ar9003-2p2 | sha1sum
+# Now compare against the Atheros HAL
+make clean
+make ATHEROS=1
+./initvals -f ar9003-2p2 | sha1sum</code>
+Each row gets its own set of 8 bits for its checksum computation. We use a u64 for the full checksum allowing us to use arrays of a max column size of 8. The Atheros initvals currently only use up to 6 columns so we only use the first 48 bits of the checksum for now.
+===== Reformat initval style =====
+Depending on your OS you may or may not need the initvals in a specific format. The format can be changed by using this tool to read the original arrays and output the arrays under a new format.
+Examples:
+<code># Generate all the initvals into one large file
+./initvals -w
+# Generate the initvals for the AR9002 family only
+./initvals -w -f ar9002
+# Generate the initvals for the AR9003 family only
+./initvals -w -f ar9003-2p2</code>
+===== Synch initvals from the Atheros HAL =====
+If you are an Atheros employee and want to synchronize changes made on the HAL onto ath9k you can use the initvals tool to generate a new initvals header for any specific hardware family. You will just need access to the Atheros .ini files and then compile this program with ATHEROS=1 as follows:
+<code>make clean
+make ATHEROS=1</code>
+You can then synch up the ath9k initvals by doing:
+<code># To synch the AR5008 initvals
+./initvals -w -f ar5008 > ar5008_initvals.h
+# To synch the AR9001 initvals
+./initvals -w -f ar9001 > ar9001_initvals.h
+# To synch the AR9002 initvals
+./initvals -w -f ar9002 > ar9002_initvals.h
+# To synch the AR9003 2p0 initvals
+./initvals -w -f ar9003-2p0 > ar9003_2p0_initvals.h
+# To synch the AR9003 2p2 initvals
+./initvals -w -f ar9003-2p2 > ar9003_2p2_initvals.h
+# To synch the AR9485 initvals
+./initvals -w -f ar9485 > ar9485_initvals.h
+# To synch the AR9580 1p0 initvals
+./initvals -w -f ar9580-1p0 > ar9580_1p0_initvals.h</code>
+You can then just cp the files into drivers/net/wireless/ath/ath9k/ and generate a respective patch for upstream inclusion. Note that initval changes are expected to have a respective equivalent *good* commit log entry, so please don't simply send initval changes without some sort of explanation, unless you just cannot find one.

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