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rbextract: support devices with plain RLE caldata

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Old MikroTik devices have the RLE-encoded radio calibration data
directly stored in the art (hard_config) partition, without LZO
compression nor any preceding ERD magic bytes. This commit adds
a fallback for these devices.

Tested on the ath79 target with a MikroTik SXT 5nD r2 (SXT Lite5),
only locally --not yet merged upstream--.

Signed-off-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>
This commit is contained in:
Roger Pueyo Centelles 2020-01-29 11:27:03 +01:00 committed by Koen Vandeputte
parent 3660a89cb9
commit c81b2e94c7
2 changed files with 14 additions and 2 deletions
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2
package/utils/rbextract/Makefile
View File

@ -11,7 +11,7 @@
include $(TOPDIR)/rules.mk include $(TOPDIR)/rules.mk
PKG_NAME:=rbextract PKG_NAME:=rbextract
PKG_RELEASE:=2 PKG_RELEASE:=3
CMAKE_INSTALL:=1 CMAKE_INSTALL:=1
include $(INCLUDE_DIR)/package.mk include $(INCLUDE_DIR)/package.mk

14
package/utils/rbextract/src/rbextract.c
View File

@ -335,7 +335,7 @@ __rb_get_wlan_data(void)
} }
/* Older ath79-based boards directly show the RB_MAGIC_ERD bytes followed by /* Older ath79-based boards directly show the RB_MAGIC_ERD bytes followed by
the LZO-compressed calibration data with no RLE */ the LZO-compressed calibration data with no RLE */
if (magic == RB_MAGIC_ERD) { else if (magic == RB_MAGIC_ERD) {
if (tag_len > RB_ART_SIZE) { if (tag_len > RB_ART_SIZE) {
printf("Calibration data too large\n"); printf("Calibration data too large\n");
goto err_free_lzo_in; goto err_free_lzo_in;
@ -362,6 +362,18 @@ __rb_get_wlan_data(void)
buf_rle_out = buf_lzo_out; buf_rle_out = buf_lzo_out;
} }
/* Even older ath79-base boards directly have RLE-encoded calibration data,
without any LZO compresion nor showing RB_MAGIC_ERD bytes */
else {
printf("Decode calibration data with RLE\n");
err = rle_decode(tag, tag_len, buf_rle_out, RB_ART_SIZE,
NULL, NULL);
if (err) {
printf("unable to decode ERD data\n");
goto err_free_rle_out;
}
}
return buf_rle_out; return buf_rle_out;
err_free_rle_out: err_free_rle_out: