[PATCH] tplink-safeloader: fix C7v5 factory flashing from vendor fw > v1.1.x

[Petr Štetiar]

Currently it's not possible to flash factory images on devices shipped
with vendor firmware versions 1.1.0 Build 20201120 rel. 50406 (published
2020-12-22):

 (curFw_ver, newFw_ver) == (1.1, 1.0) [NM_Error](nm_checkSoftVer) 00848: Firmwave not supports, check failed.
 [NM_Error](nm_checkUpdateContent) 01084: software version dismatched
 [NM_Error](nm_buildUpgradeStruct) 01188: checkUpdateContent failed.

They've even following note in release notes:

 Note: You will be unable to downgrade to the previous firmware version after updating this firmware.

This version check is in vendor firmware is implemented in
/usr/bin/nvrammanager binary as following code[1]:

 sscanf(buf, "%d.%d.%*s",&upd_fw_major, &upd_fw_minor);
 ...
 if (((int)upd_fw_major < (int)cur_fw_major) ||
     ((ret = 1, cur_fw_major == upd_fw_major && (upd_fw_minor < (int)cur_fw_minor)))) {
       ret = 0;
       printf("[NM_Error](%s) %05d: Firmwave not supports, check failed.\r\n\r\n","nm_checkSoftVer" ,0x350);
 }
 ...
 return ret;

So in order to fix this and make it future proof it should be enough to
ship our factory firmware images with major version 7 (lucky number).

Tested on latest firmware version 1.1.2 Build 20210125 rel.37999:

 Firmwave supports, check OK.
  (curFw_ver, newFw_ver) == (1.1, 7.0) check firmware ok!
 chekc firmware file success!

1. https://gist.github.com/ynezz/2e0583647d863386a66c3d231541b6d1

Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 tools/firmware-utils/src/tplink-safeloader.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/firmware-utils/src/tplink-safeloader.c b/tools/firmware-utils/src/tplink-safeloader.c
index da73e1bf307e..ac71b3305ee6 100644
--- a/tools/firmware-utils/src/tplink-safeloader.c
+++ b/tools/firmware-utils/src/tplink-safeloader.c
@@ -1262,7 +1262,7 @@ static struct device_info boards[] = {
 			"{product_name:Archer C7,product_ver:5.0.0,special_id:4B520000}\n",
 
 		.part_trail = 0x00,
-		.soft_ver = "soft_ver:1.0.0\n",
+		.soft_ver = "soft_ver:7.0.0\n",
 
 		/* We're using a dynamic kernel/rootfs split here */
 		.partitions = {