Port MTK SDK to OpenWrt

Overview

Tarball MediaTek_ApSoC_SDK_4300_20140916.tar.bz2, assuming this obsoletes mtk_ralink_apsoc_sdk_4210_20140326. TAR.BZ2, yes? issues Do we really not need to run make DEP? Installing Toolchains

Unload MTK SDK tarball, install relevant toolchains under/opt:buildroot-gcc342 buildroot-gcc463 Activate 3.10.14 ke Rnel for MT7620

In Config/mkconfig (line 107), change:

echo "elif [\ $CONFIG _defaults_ralink_mt7620 = \" Y\ "]; Then "
echo" Define_bool config_defaults_kernel_2_6_36 y "
echo" Define_bool config_defaults_kernel_3_10_14 n "

To:

echo "elif [\ $CONFIG _defaults_ralink_mt7620 = \" Y\ "]; Then "
echo" Define_bool config_defaults_kernel_2_6_36 n "
echo" Define_bool config_defaults_kernel_3_10_14 y "

Fix various makefiles

Build errors of the form:

makefile:376: * * * mixed implicit and normal rules.  Stop.

Is explained here, so you had to adjust a number of makefiles to work with the newest version of make. Just Fix the errors as you run across them. Non-wifi Build

Start with trying to build a basic image with no WiFi support yet (and no OpenWrt support), make DEP generates diagnostics :

Ralink/kconfig:206:warning: ' Rt_first_card ': number is invalid
ralink/kconfig:207:warning: ' Rt_first_card ': Number is invalid
ralink/kconfig:208:warning: ' Rt_first_card ': number is invalid
ralink/kconfig:221:warning: ' Rt_second_card ': number is invalid
ralink/kconfig:222:warning: ' Rt_second_card ': number is invalid
ralink/ Kconfig:223:warning: ' Rt_second_card ': number is invalid
ralink/kconfig:224:warning: ' Rt_second_card ': number is Invalid

Because of config entries that is defined as "int" but has some non-int values:

Config Rt_first_card int depends on ! First_if_none default 2860 If first_if_rt2860 default 7620 if first_if_mt7620 default 7628 if FIRS t_if_mt7628 default 3090 If first_if_rt3092 default 5392 if first_if_rt5392 default 5592 if First_ if_rt5592 default 3593 If first_if_rt3593 default 7610 if first_if_mt7610e default 7612e if First_
        if_mt7612e default 7602e If first_if_mt7602e default 7603e if first_if_mt7603e config Rt_second_card int depends on ! Second_if_none default 3090 If second_if_rt3092 default 5392 if second_if_rt5392 default 5592 if S  econd_if_rt5592 default 3593 If second_if_rt3593 default 7610 if second_if_mt7610e default 8592 if second_if_rt8592 default 3572 If second_if_rt3572 default 5572 if second_if_rt5572 default 7612e If second_if_mt7612e default 7612u if Second_if_mt7612u default 7602e If second_if_mt7602e default 7603e if second_if_mt7603e
 

Obviously, those config selections shouldn ' t be defined as "int"; MediaTek should fix, but it doesn ' t affect us--this produces a successful build. Adding OpenWrt Support

If you now try to add "OpenWrt.", you get the build error:

..... snip
... Make-c  libnvram
make[2]: Entering directory '/home/rpjday/flex/mtk_sdk/sdk/rt288x_sdk/source/lib/ Libnvram '
make[2]: * * * No rule to make target '/home/rpjday/flex/mtk_sdk/sdk/rt288x_sdk/source/kernel_headers/ Include/linux/autoconf.h ', needed by ' crc32.o '.  Stop.
MAKE[2]: Leaving directory '/home/rpjday/flex/mtk_sdk/sdk/rt288x_sdk/source/lib/libnvram '
makefile:369:recipe For target ' _dir_libnvram ' failed
make[1]: * * [_dir_libnvram] Error 2
make[1]: Leaving directory '/home/rpjday/ Flex/mtk_sdk/sdk/rt288x_sdk/source/lib '
makefile:493:recipe for Target ' lib_only ' failed make
: * * * [lib_ Only] Error 2

This seems odd since if you *don ' t* select ' Support OpenWrt ', which library appears to build just fine, so there ' s somethin G in the selection of OPENWRT support that clearly changes the build environment.

Here's a snippet of the Makefile from that directory:

Ifneq ($ (kernel_headers),)
Linuxdir = $ (kernel_headers)
endif ...

snip

... Objs   : = crc32.o nvram_env.o flash_api.o
HEADERS: = Nvram_env.h nvram.h flash_api.h $ (rootdir)/$ (linuxdir)/ Include/linux/autoconf.h

So a early setting of kernel_headers can certainly screw things up.

From a completely fresh checkout of the SDK, we had this:

$ find. -name autoconf.h
./linux-3.10.14.x/include/generated/autoconf.h   <---????
. /lib/libgdbm-1.8.3/autoconf.h
./lib/vstr-1.0.15/include/autoconf.h
$

Do a non-openwrt configure and build for mt7620a, and it all works (Libnvram directory is compiled), and:

$ find. -name autoconf.h
./linux-3.10.14.x/include/linux/autoconf.h
./linux-3.10.14.x/include/uapi/linux/ Autoconf.h
./linux-3.10.14.x/include/generated/autoconf.h.
/config/autoconf.h.
/lib/libgdbm-1.8.3/ Autoconf.h.
/lib/vstr-1.0.15/include/autoconf.h.
/kernel_headers/include/linux/autoconf.h.
/ Autoconf.h
./user/busybox/include/autoconf.h
$

After make clean:

$ find. -name autoconf.h
./linux-3.10.14.x/include/linux/autoconf.h
./linux-3.10.14.x/include/uapi/linux/ Autoconf.h
./linux-3.10.14.x/include/generated/autoconf.h.
/config/autoconf.h.
/lib/ Libgdbm-1.8.3/autoconf.h
./lib/vstr-1.0.15/include/autoconf.h.
/autoconf.h.
/user/busybox/ Include/autoconf.h
$

After doing another make (which should change to nothing):

$ find. -name autoconf.h
./linux-3.10.14.x/include/linux/autoconf.h
./linux-3.10.14.x/include/uapi/linux/ Autoconf.h
./linux-3.10.14.x/include/generated/autoconf.h.
/config/autoconf.h.
/lib/libgdbm-1.8.3/ Autoconf.h.
/lib/vstr-1.0.15/include/autoconf.h.
/kernel_headers/include/linux/autoconf.h.
/ Autoconf.h
./user/busybox/include/autoconf.h
$

One last time, make clean, add OpenWrt support, save, and here ' s the kernel config file difference:

$ diff. config.old. config
5c5
< # CONFIG_SUPPORT_OPENWRT is not set
---
> Config_support_ Openwrt=y
31a32
> # Config_rt2880_rootfs_in_flash are not set
42c43
< # Config_boot_raw are not Set
---
> config_boot_raw=y
55d55
< config_boot_elf32=y
604a605
> # config_ Mtd_split is not set
$

Nothing jumps on me, so try to build and get earlier error:

Make-c  libnvram
make[2]: Entering directory '/home/rpjday/flex/mtk_sdk/sdk/rt288x_sdk/source/lib/ Libnvram '
make[2]: * * * No rule to make target '/home/rpjday/flex/mtk_sdk/sdk/rt288x_sdk/source/kernel_headers/ Include/linux/autoconf.h ', needed by ' crc32.o '.  Stop.
MAKE[2]: Leaving directory '/home/rpjday/flex/mtk_sdk/sdk/rt288x_sdk/source/lib/libnvram '
makefile:369:recipe For target ' _dir_libnvram ' failed
make[1]: * * [_dir_libnvram] Error 2
make[1]: Leaving directory '/home/rpjday/ Flex/mtk_sdk/sdk/rt288x_sdk/source/lib '
makefile:493:recipe for Target ' lib_only ' failed make
: * * * [lib_only ] Error 2

Because this:

$ find. -name autoconf.h
./linux-3.10.14.x/include/linux/autoconf.h
./linux-3.10.14.x/include/uapi/linux/ Autoconf.h
./linux-3.10.14.x/include/generated/autoconf.h.
/config/autoconf.h.
/lib/ Libgdbm-1.8.3/autoconf.h
./lib/vstr-1.0.15/include/autoconf.h.
/autoconf.h.
/user/busybox/ Include/autoconf.h
$

In short, asking-OpenWrt support prevents Autoconf.h from being placed in the Kernel_headers directory. Oh, wait, here it's in the kernel source file Include/uapi/linux/kbuild:

Ifndef config_support_openwrt
header-y + = autoconf.h
endif

What's the reason for? kernel_headers

Under vendors/ralink/mt7620/config/:

 $ grep kernel_headers * 2m_16m_config.uclibc0933-3.10.14.x:kernel_headers= "$ (rootdir)/kernel_headers/include" 2m_16m_config.uclibc-3.10.14.x:kernel_source= "$ (rootdir)/$ (kernel_headers)" 4m_32m_config.uclibc0933-2.6.36.x: Kernel_headers= "$ (rootdir)/$ (linuxdir)/include" 4m_32m_config.uclibc0933-3.10.14.x:kernel_headers= "$ (ROOTDIR)/ Kernel_headers/include "4m_32m_config.uclibc-3.10.14.x:kernel_source=" $ (rootdir)/$ (kernel_headers) "8M_32M_voip_ Config.uclibc0933-2.6.36.x:kernel_headers= "$ (rootdir)/$ (linuxdir)/include" 8m_32m_voip_ Config.uclibc0933-3.10.14.x:kernel_headers= "$ (rootdir)/kernel_headers/include" 8m_32m_voip_ Config.uclibc-3.10.14.x:kernel_source= "$ (rootdir)/$ (kernel_headers)" 8m_64m_config.uclibc0933-3.10.14.x:kernel_ Headers= "$ (rootdir)/kernel_headers/include" 8m_64m_config.uclibc-3.10.14.x:kernel_source= "$ (ROOTDIR)/$ (KERNEL_ HEADERS) "$ 

But under a 3.10 kernel, an external kernel headers seems unnecessary since all exported headers would be under INCLUDE/UAP I/and various other uapi/directories.

For now, cheap fix for Include/uapi/linux/kbuild:

# ifndef Config_support_openwrt
header-y + = autoconf.h
# endif

But why is this do in the first place? (Need-to-clean and rebuild-to-take effect.) Ralink/kconfig Wireless Selection

In the MTK SDK, extra line at end of Arch/mips/kconfig:

SOURCE "Ralink/kconfig"

As for Ralink/kconfig (the only file in the top-level Ralink directory), here is the source directives:

SOURCE "Drivers/net/rt_rdm/kconfig"
source "Drivers/net/raeth/kconfig"
#source "drivers/net/wireless/ Rt2860v2_ap/kconfig "
#source" Drivers/net/wireless/rt2860v2_sta/kconfig "
#source" drivers/net/wireless/ Rtpci_ap/kconfig "
#source" Drivers/net/wireless/rt3090_ap/kconfig "
#source" drivers/net/wireless/rt5392_ Ap/kconfig "
#source" Drivers/net/wireless/rt5592_ap/kconfig "
#source" drivers/net/wireless/rt3593_ap/ Kconfig "
#source" Drivers/net/wireless/rt3572_ap/kconfig "
#source" drivers/net/wireless/rt5572_ap/ Kconfig "
#source" Drivers/net/wireless/inic/kconfig "
#source" Drivers/net/wireless/inic_rt305x/kconfig "
#source" Drivers/net/wireless/rt3680_ap/kconfig "
#source" Drivers/net/wireless/mt7610_ap/kconfig "
#source "Drivers/net/wireless/rlt_wifi/kconfig"
source "Drivers/usb/dwc_otg/kconfig"
source "net/ Nat/hw_nat/kconfig "

Here's the first mystery--which selection for onboard 2.4G?

#############
# Wireless
#############
menuconfig wifi_driver
        bool "WiFi DRIVER support"

if WiFi _driver

choice
        Prompt "Choose first WiFi Interface"
        config first_if_none
        bool "NONE"

        config first _if_rt2860
        bool "RT2860 for RT2860V2 wifi driver"
        select Rtmp_mac
        select ralink_rt2860

        config first_if_mt7620
        bool "MT7620 for Rlt_wifi WiFi driver"  <---typo, "rtl_wifi", no?
        Select Rtmp_mac
        Select ralink_rt6352

It looks like we want the second one – "RT6352" is apparently the CPU type. But this config symbol doesn ' t appear to being tested anywhere in the newer kernels:

Grep-r RT6352 * linux-2.6.21.x/include/asm-mips/rt2880/eureka_ep430.h: #elif defined (config_ralink_rt6855) | | Defined (config_ralink_rt6352) linux-2.6.21.x/include/asm-mips/rt2880/surfboardint.h: #elif defined (config_ralink_ RT3052) | | Defined (config_ralink_rt3352) | | Defined (config_ralink_rt2883) | | Defined (config_ralink_rt5350) | | Defined (config_ralink_rt6855) | | Defined (config_ralink_rt6352) Linux-2.6.21.x/include/asm-mips/rt2880/rt_mmap.h: #elif defined (config_ralink_ RT6855) | |	Defined (config_ralink_rt6352) linux-2.6.36.x/ralink/kconfig:select ralink_rt6352 linux-2.6.36.x/ralink/kconfig: Select ralink_rt6352 linux-3.10.14.x/ralink/kconfig:select ralink_rt6352 linux-3.10.14.x/ralink/kconfig:select ralink_rt6352 vendors/ralink/mt7621/config/8m_16m_config.linux-2.6.36.x.mt7612-efuse-txbf:# CONFIG_RALINK_RT6352 is not set vendors/ralink/mt7621/config/8m_64m_config.linux-2.6.36.x:# config_ralink_rt6352 are not set vendors/Ralink/ mt7621/config/128m_128m_config.linux-2.6.36.x:# CONfig_ralink_rt6352 is not set vendors/ralink/mt7621/config/8m_16m_config.linux-2.6.36.x.mt7612-efuse:# CONFIG_RALINK
_rt6352 is not set vendors/ralink/mt7621/config/8m_16m_config.linux-2.6.36.x.txbf:# config_ralink_rt6352 are not set Vendors/ralink/mt7620/config/2m_16m_config.linux-2.6.36.x:config_ralink_rt6352=y vendors/Ralink/MT7620/config/ 8m_64m_config.linux-2.6.36.x:config_ralink_rt6352=y vendors/ralink/mt7620/config/4m_32m_config.linux-2.6.36.x:
 Config_ralink_rt6352=y Vendors/ralink/mt7620/config/8m_64m_config.linux-2.6.36.x.mt7530:config_ralink_rt6352=y $

Looking for ralink_rt2860 is even worse:

$ grep-r ralink_rt2860 *
linux-2.6.36.x/ralink/kconfig:	Select ralink_rt2860
linux-3.10.14.x/ralink/ Kconfig:	Select ralink_rt2860
$

And this, too:

Linux-3.10.14.x/ralink/kconfig:select Rtmp_mac linux-3.10.14.x/ralink/kconfig:select RTMP_MAC linux-3.10.14.x/	Ralink/kconfig:select Rtmp_mac linux-3.10.14.x/ralink/kconfig:select Rtmp_mac linux-3.10.14.x/ralink/kconfig:
Select Rtmp_mac linux-3.10.14.x/ralink/kconfig:select rtmp_mac linux-3.10.14.x/ralink/kconfig:select RTMP_MAC Linux-3.10.14.x/ralink/kconfig:select Rtmp_mac linux-3.10.14.x/ralink/kconfig:select RTMP_MAC linux-3.10.14.x/	Ralink/kconfig:select Rtmp_mac linux-3.10.14.x/ralink/kconfig:select Rtmp_mac linux-3.10.14.x/ralink/kconfig: Select Rtmp_mac linux-3.10.14.x/ralink/kconfig:select rtmp_mac vendors/ralink/mt7621/config/8m_16m_ config.linux-2.6.36.x.mt7612-efuse-txbf:# Config_rtmp_mac is not set vendors/ralink/mt7621/config/8m_64m_ config.linux-2.6.36.x:# Config_rtmp_mac is not set vendors/ralink/mt7621/config/128m_128m_config.linux-2.6.36.x:# Config_rtmp_mac is not set vendors/ralink/mt7621/config/8m_16m_config.linux-2.6.36.x.mt7612-efuse:# CONFIG_RTMP_MAC is noT set vendors/ralink/mt7621/config/8m_16m_config.linux-2.6.36.x.txbf:# Config_rtmp_mac is not set vendors/Ralink/ mt7628/config/8m_64m_config.linux-2.6.36.x:# Config_rtmp_mac is not set vendors/ralink/mt7628/config/4m_32m_ config.linux-2.6.36.x:# Config_rtmp_mac is not set vendors/ralink/mt7628/config/2m_8m_config.linux-2.6.36.x:# CONFIG _rtmp_mac is not set vendors/ralink/mt7620/config/2m_16m_config.linux-2.6.36.x:config_rtmp_mac=y vendors/Ralink/ Mt7620/config/8m_64m_config.linux-2.6.36.x:config_rtmp_mac=y vendors/ralink/mt7620/config/4m_32m_ Config.linux-2.6.36.x:config_rtmp_mac=y Vendors/ralink/mt7620/config/8m_64m_config.linux-2.6.36.x.mt7530:config
 _rtmp_mac=y

But lots of checking under 2.6.36 kernel under drivers/staging/rt2860.

From Http://www.crashcourse.ca/wiki/index.php/OpenWrt_MTK_SDK