Finally OpenWrt new version comes to stable. There are many great new feature for new Linux kernel and also improve stable for OpenWrt, why not have a try?

First, everything is same as usual, make an image by Disk Utility, 10GB is enough.

Clone from OpenWrt, I use github version, it is faster than openwrt server: git clone https://github.com/openwrt/openwrt.git -b openwrt-21.02

We can not use make, because it will throw error: /Volumns/OpenWrt21/include/toplevel.mk:29: *** Please use a newer version of GNU make. The version shipped by Apple is not supported.  Stop.

Use brew install make, then call gmake menuconfig will fix such problem.

After menuconfig select correct settings, we can directly call gmake V=s to start the make process.

After a while, it will stop at “Checking for c++filt…“, it is for libstdc++-v3, we need to go to build_dir libstdc++-v3 folder, modify configure file, delete from line 79170 to 79296 to avoid checking such command. No idea why it stuck there…and c++filt seems not critical if not exists.

Then just keep building, rest seems smoothly.

Next blog I will check if there is any bug need to patch for this new version.

Because of the macro is pretty complex, have to use a trick. The old version Makefile works fine, so we can use its macro define.

Grab the Makefile command line first:

mipsel-openwrt-linux-musl-gcc -Wp,-MD,/Volumes/OpenWrt18/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/mt7628-p4rev-120395/build/../src/embedded/os/linux/.rt_pci_rbus.o.d  -nostdinc -isystem /Volumes/OpenWrt18/staging_dir/toolchain-mipsel_24kc_gcc-7.3.0_musl/bin/../lib/gcc/mipsel-openwrt-linux-musl/7.3.0/include -I./arch/mips/include -I./arch/mips/include/generated  -I./include -I./arch/mips/include/uapi -I./arch/mips/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -DVMLINUX_LOAD_ADDRESS=0xffffffff80000000 -DLINKER_LOAD_ADDRESS=0x80000000 -DDATAOFFSET=0 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -fno-PIE -mno-check-zero-division -mabi=32 -G 0 -mno-abicalls -fno-pic -pipe -mno-branch-likely -msoft-float -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float -ffreestanding -fno-stack-check -march=mips32r2 -mtune=34kc -Wa,--trap -DTOOLCHAIN_SUPPORTS_VIRT -I./arch/mips/include/asm/mach-ralink -I./arch/mips/include/asm/mach-ralink/mt7620 -I./arch/mips/include/asm/mach-generic -fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -Os -fno-caller-saves --param=allow-store-data-races=0 -DCC_HAVE_ASM_GOTO -Wframe-larger-than=1024 -fstack-protector -Wno-unused-but-set-variable -Wno-unused-const-variable -fomit-frame-pointer -fno-var-tracking-assignments -g -femit-struct-debug-baseonly -fno-var-tracking -Wdeclaration-after-statement -Wno-pointer-sign -Wno-array-bounds -Wno-stringop-overflow -Wno-restrict -Wno-maybe-uninitialized -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -I/Volumes/OpenWrt18/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/mt7628-p4rev-120395/build/../src/include -I/Volumes/OpenWrt18/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/mt7628-p4rev-120395/build/../src/embedded/include -I/Volumes/OpenWrt18/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/mt7628-p4rev-120395/build/../src/ate/include -DCONFIG_SUPPORT_OPENWRT=y -DCONFIG_RALINK_MT7628=y -DNEW_RATE_ADAPT_SUPPORT -DUAPSD_SUPPORT -DUAPSD_DEBUG -DMT_PS -DWSC_INCLUDED -DWSC_SINGLE_TRIGGER -DWSC_AP_SUPPORT -DWSC_V2_SUPPORT -DDOT11W_PMF_SUPPORT -DSOFT_ENCRYPT -DMBSS_SUPPORT -DMT7628 -DMT_BBP -DMT_RF -DRTMP_RBUS_SUPPORT -DRTMP_RF_RW_SUPPORT -DMT_MAC -DRTMP_MAC_PCI -DRTMP_PCI_SUPPORT -DRTMP_FLASH_SUPPORT -DDMA_SCH_SUPPORT -DRTMP_EFUSE_SUPPORT -DCONFIG_ANDES_SUPPORT -DRESOURCE_PRE_ALLOC -DNEW_MBSSID_MODE -DENHANCE_NEW_MBSSID_MODE -DENHANCED_STAT_DISPLAY -DFIFO_EXT_SUPPORT -DMCS_LUT_SUPPORT -DUSE_BMC -DTHERMAL_PROTECT_SUPPORT -DCAL_FREE_IC_SUPPORT -DAGGREGATION_SUPPORT -DPIGGYBACK_SUPPORT -DWMM_SUPPORT -DLINUX -Wall -Wstrict-prototypes -Wno-trigraphs -DCONFIG_AP_SUPPORT -DSCAN_SUPPORT -DAP_SCAN_SUPPORT -DDOT11_N_SUPPORT -DDOT11N_DRAFT3 -DSTATS_COUNT_SUPPORT -DIAPP_SUPPORT -DDOT1X_SUPPORT -DCONFIG_RA_NAT_NONE -DDBG -DIP_ASSEMBLY  -DMODULE -mno-long-calls  -DKBUILD_BASENAME='"rt_pci_rbus"'  -DKBUILD_MODNAME='"mt7628"' -c -o /Volumes/OpenWrt18/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/mt7628-p4rev-120395/build/../src/embedded/os/linux/rt_pci_rbus.o /Volumes/OpenWrt18/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/mt7628-p4rev-120395/build/../src/embedded/os/linux/rt_pci_rbus.c

Now we can find the define: -DCONFIG_SUPPORT_OPENWRT=y -DCONFIG_RALINK_MT7628=y -DNEW_RATE_ADAPT_SUPPORT -DUAPSD_SUPPORT -DUAPSD_DEBUG -DMT_PS -DWSC_INCLUDED -DWSC_SINGLE_TRIGGER -DWSC_AP_SUPPORT -DWSC_V2_SUPPORT -DDOT11W_PMF_SUPPORT -DSOFT_ENCRYPT -DMBSS_SUPPORT …

Compare Makefile, we can get the defines. Update Makefile…

PKG_CONFIG_DEPENDS:=\
    CONFIG_MT7628_AP_SUPPORT=m \
    CONFIG_SUPPORT_OPENWRT=y \
    CONFIG_RALINK_MT7628=y \
    CONFIG_MT7628_NEW_RATE_ADAPT_SUPPORT=y \
    CONFIG_MT7628_UAPSD=y \
    CONFIG_MT7628_MAC=y \
    CONFIG_MT7628_WSC_INCLUDED=y \
    CONFIG_MT7628_WSC_V2_SUPPORT=y \
    CONFIG_MT7628_DOT11W_PMF_SUPPORT=y \
    CONFIG_MT7628_MBSS_SUPPORT=y \
    CONFIG_MT7628_WPA3_SUPPORT=y 

Then call “make package/mt7628/compile V=s”

Because there is no patch, we will get a lot of errors…I find most of the problem is not critical…Like this:

/Volumes/OpenWrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/mt7628-wifi/mt7628_wifi_ap/../mt7628_wifi/embedded/common/wsc.c:9903:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if

The driver internal Makefile default has -Werror, so such warning from new compiler gcc are dealed as error. That can be removed. Rest problem is because of new Linux kernel modify, so final patch like this:

--- a/mt7628_wifi_ap/Makefile
+++ b/mt7628_wifi_ap/Makefile
@@ -533,7 +533,7 @@
 #  CFLAGS
 ##################
 EXTRA_CFLAGS += -DAGGREGATION_SUPPORT -DPIGGYBACK_SUPPORT -DWMM_SUPPORT  -DLINUX \
-               -Wall -Wstrict-prototypes -Wno-trigraphs -Werror -Wframe-larger-than=4096
+               -Wall -Wstrict-prototypes -Wno-trigraphs -Wframe-larger-than=4096
 #-DDBG_DIAGNOSE -DDBG_RX_MCS -DDBG_TX_MCS
 
 EXTRA_CFLAGS += -DCONFIG_AP_SUPPORT -DSCAN_SUPPORT -DAP_SCAN_SUPPORT
--- a/mt7628_wifi/embedded/common/cmm_info.c
+++ b/mt7628_wifi/embedded/common/cmm_info.c
@@ -97,7 +97,6 @@
 {
 #ifdef CONFIG_AP_SUPPORT
 	IF_DEV_CONFIG_OPMODE_ON_AP(pAd)
-		MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_OFF, ("Driver version-%s %s %s\n", AP_DRIVER_VERSION, __DATE__, __TIME__));
 #endif /* CONFIG_AP_SUPPORT */
 
 #ifdef CONFIG_STA_SUPPORT
--- a/mt7628_wifi/embedded/os/linux/rt_profile.c
+++ b/mt7628_wifi/embedded/os/linux/rt_profile.c
@@ -236,7 +236,7 @@
 		{
 #ifndef OS_ABL_SUPPORT
 			// TODO: need to roll back when convert into OSABL code
-				 fsize = (ULONG)srcf->f_dentry->d_inode->i_size;
+				 fsize = (ULONG)srcf->f_path.dentry->d_inode->i_size;
 				if (buf_size < (fsize + 1))
 					buf_size = fsize + 1;
 #endif /* OS_ABL_SUPPORT */
--- a/mt7628_wifi/embedded/common/wsc.c
+++ b/mt7628_wifi/embedded/common/wsc.c
@@ -9847,7 +9847,7 @@
 	//PWSC_UPNP_NODE_INFO pWscUPnPNodeInfo;
 	UCHAR		apIdx;
 
-#ifdef LINUX
+#ifdef LINUX_SIG
 #ifdef WSC_SINGLE_TRIGGER
 /* +++  added by YYHuang@Ralink, 08/03/12 */
 /*
--- a/mt7628_wifi/embedded/os/linux/rt_proc.c
+++ b/mt7628_wifi/embedded/os/linux/rt_proc.c
@@ -29,7 +29,7 @@
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/proc_fs.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include "rt_config.h"

Then we can successfully get the mt7628.ko file.

MediaTek wifi driver already supported WPA3, and works stable; compared to the opensourced one, still has high chance(20~30%) disconnect while using, and speed is very unstable. So before I can understand and fix the opensource wifi driver problem, I guess a fast way is to port the MediaTek wifi driver first.

Currently I am making some progress about Makefile, but still can not get compiled mt7628.ko yet. There is a lot of CONFIG define need to be clear first, or it will bring weird trouble. This must be a long way to go.

 include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
 

 PKG_NAME:=mt7628-wifi
 PKG_SOURCE:=MT7628_LinuxAP_V4.1.1.0_DPA_20190925.tar.bz2
 PKG_SOURCE_URL:=http://vonger.cn/misc/vocore2/
 PKG_MD5SUM:=20db265032718ccde1c9e12f89939c0e
 PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/$(PKG_NAME)
 

 include $(INCLUDE_DIR)/package.mk
 
 PKG_CONFIG_DEPENDS:=\
     CONFIG_MT7628_AP_SUPPORT=m \
     CONFIG_SUPPORT_OPENWRT=y \
     CONFIG_RALINK_MT7628=y \
     CONFIG_MT7628_NEW_RATE_ADAPT_SUPPORT=y \
     CONFIG_MT7628_UAPSD=y \
     CONFIG_MT7628_MAC=y \
     CONFIG_MT7628_WSC_INCLUDED=y \
     CONFIG_MT7628_WSC_V2_SUPPORT=y \
     CONFIG_MT7628_DOT11W_PMF_SUPPORT=y \
     CONFIG_MT7628_MBSS_SUPPORT=y \
     CONFIG_MT7628_WPA3_SUPPORT=y  
 

 include $(INCLUDE_DIR)/package.mk
 

 TAR_CMD=$(HOST_TAR) -C $(1)/ $(TAR_OPTIONS)
 

 define KernelPackage/mt7628-wifi
   TITLE:=MTK MT7628 WiFi Driver
   FILES:=$(PKG_BUILD_DIR)/mt7628.ko
   SECTION:=vocore2
   CATEGORY:=VoCore2
   AUTOLOAD:=$(call AutoLoad,98,mt7628)
 endef
 

 define Build/Compile
     $(MAKE) -C "$(LINUX_DIR)" \
     CROSS_COMPILE="$(TARGET_CROSS)" \
     ARCH="$(LINUX_KARCH)" \
     SUBDIRS="$(PKG_BUILD_DIR)/mt7628_wifi_ap" \
     M="$(PKG_BUILD_DIR)/mt7628_wifi_ap" \
     $(PKG_CONFIG_DEPENDS) \
     modules
 endef
 

 $(eval $(call KernelPackage,mt7628-wifi)) 

A simple explain of the Makefile. First from start to “include package.mk” just declare the package download path. PKG_CONFIG_DEPENDS is the real driver configure, this should be done in menuconfig, but for simple, I put it into Makefile. TAR_CMD is a modify version of tar, or when you compile openwrt will complain source code path is not correct. “define KernelPackage/mt7628-wifi” to “endef” is used to show this driver in openwrt menuconfig.

The most important one is “define Build/Compile”, this block is the command used to compile Linux kernel driver, we use the PKG_CONFIG_DEPENDS here. Actually you can directly change every marco in this command line to real path and file, then it can directly work in command line.