From 86a1f5261795434c0e89b3f40fe5b5bfeba50602 Mon Sep 17 00:00:00 2001
From: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Date: Mon, 14 Oct 2019 14:02:41 +0200
Subject: [PATCH] lantiq: modify ath9k caldata extraction to reuse caldata.sh

In lantiq, ath9k caldata extraction is implemented to work in two
alternate "modes", the standard one and another one with swapped
byte pairs.

This rearranges the functions so "standard" use is based on the
caldata.sh library, while only a single local function is required
for the special case.

Note that while the parameter for switching between normal and swab
is removed, the size of the caldata is added to the function calls
to stay consistent.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
---
 .../etc/hotplug.d/firmware/12-ath9k-eeprom    | 62 +++++--------------
 1 file changed, 15 insertions(+), 47 deletions(-)

diff --git a/target/linux/lantiq/base-files/etc/hotplug.d/firmware/12-ath9k-eeprom b/target/linux/lantiq/base-files/etc/hotplug.d/firmware/12-ath9k-eeprom
index d0bef23045..5a6e8d360b 100644
--- a/target/linux/lantiq/base-files/etc/hotplug.d/firmware/12-ath9k-eeprom
+++ b/target/linux/lantiq/base-files/etc/hotplug.d/firmware/12-ath9k-eeprom
@@ -1,55 +1,23 @@
 #!/bin/sh
-# Based on ar71xx 10-ath9k-eeprom
 
 [ -e /lib/firmware/$FIRMWARE ] && exit 0
 
 . /lib/functions/caldata.sh
-. /lib/upgrade/nand.sh
 
-ath9k_eeprom_extract_raw() {
-	local source=$1
-	local offset=$(($2))
-	local swap=$3
-	local size=4096
-	local bs=1
-	local conv=
-
-	if [ $swap -gt 0 ]; then
-		bs=2
-		conv="conv=swab"
-		size=$((size / bs))
-		offset=$((offset / bs))
-	fi
-
-	dd if=$source of=/lib/firmware/$FIRMWARE bs=$bs skip=$offset count=$size $conv 2>/dev/null || \
-			caldata_die "failed to extract from $mtd"
-}
-
-ath9k_eeprom_extract() {
+caldata_extract_swap() {
 	local part=$1
 	local offset=$2
-	local swap=$3
+	local count=$3
 	local mtd
 
 	mtd=$(find_mtd_chardev $part)
-	[ -n "$mtd" ] || \
-		caldata_die "no mtd device found for partition $part"
-
-	ath9k_eeprom_extract_raw $mtd $offset $swap
-}
-
-ath9k_ubi_eeprom_extract() {
-	local part=$1
-	local offset=$2
-	local swap=$3
-	local ubidev=$(nand_find_ubi $CI_UBIPART)
-	local ubi
+	[ -n "$mtd" ] || caldata_die "no mtd device found for partition $part"
 
-	ubi=$(nand_find_volume $ubidev $part)
-	[ -n "$ubi" ] || \
-		caldata_die "no UBI volume found for $part"
+	offset=$(($offset / 2))
+	count=$(($count / 2))
 
-	ath9k_eeprom_extract_raw /dev/$ubi $offset $swap
+	dd if=$mtd of=/lib/firmware/$FIRMWARE bs=2 skip=$offset count=$count conv=swab 2>/dev/null || \
+		caldata_die "failed to extract calibration data from $mtd"
 }
 
 case "$FIRMWARE" in
@@ -60,25 +28,25 @@ case "$FIRMWARE" in
 
 		case "$board" in
 			arcadyan,arv7518pw)
-				ath9k_eeprom_extract "boardconfig" 0x400 1
+				caldata_extract_swap "boardconfig" 0x400 0x1000
 				;;
 			arcadyan,arv8539pw22)
-				ath9k_eeprom_extract "art" 0x400 1
+				caldata_extract_swap "art" 0x400 0x1000
 				;;
 			bt,homehub-v2b)
-				ath9k_eeprom_extract "art" 0x0 1
+				caldata_extract_swap "art" 0x0 0x1000
 				ath9k_patch_mac_crc "00:00:00:00:00:00" 0x20c
 				;;
 			bt,homehub-v3a)
-				ath9k_eeprom_extract "art-copy" 0x0 1
+				caldata_extract_swap "art-copy" 0x0 0x1000
 				ath9k_patch_mac_crc $(macaddr_add $(mtd_get_mac_ascii uboot_env ethaddr) +2) 0x10c
 				;;
 			bt,homehub-v5a)
-				ath9k_ubi_eeprom_extract "caldata" 0x1000 0
+				caldata_extract_ubi "caldata" 0x1000 0x1000
 				ath9k_patch_mac_crc $(macaddr_add $(mtd_get_mac_binary_ubi caldata 0x110c) +2) 0x10c
 				;;
 			netgear,dgn3500|netgear,dgn3500b)
-				ath9k_eeprom_extract "calibration" 0xf000 0
+				caldata_extract "calibration" 0xf000 0x1000
 				ath9k_patch_mac_crc $(macaddr_add $(mtd_get_mac_ascii uboot-env ethaddr) +2) 0x20c
 				;;
 			avm,fritz3370-rev2-hynix|\
@@ -87,13 +55,13 @@ case "$FIRMWARE" in
 				caldata_extract_reverse "urlader" 0x1541 0x440
 				;;
 			avm,fritz7312|avm,fritz7320|avm,fritz7360sl)
-				ath9k_eeprom_extract "urlader" 0x985 0
+				caldata_extract "urlader" 0x985 0x1000
 				;;
 			avm,fritz7412)
 				/usr/bin/fritz_cal_extract -i 1 -s 0x1e000 -e 0x207 -l 4096 -o /lib/firmware/$FIRMWARE $(find_mtd_chardev "urlader")
 				;;
 			tplink,tdw8970|tplink,tdw8980)
-				ath9k_eeprom_extract "boardconfig" 0x21000 0
+				caldata_extract "boardconfig" 0x21000 0x1000
 				;;
 			*)
 				caldata_die "board $board is not supported yet"
-- 
2.30.2