UBports Robot Logo UBports Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Search
    • Register
    • Login

    Adding a kernel module for USB wifi adapter

    Scheduled Pinned Locked Moved Unsolved
    Support
    3
    28
    3.2k
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • ?
      A Former User
      last edited by A Former User

      I'm finally able to build without errors again. I didn't do anything with menuconfig this time though, just make clean && source build/envsetup.sh && mka. Again, it looks like the driver did not end up in the output:

      root@ubports:~/ubp-5.1# cout
root@ubports:~/ubp-5.1/out/target/product/hammerhead# find . |grep mt7601u
root@ubports:~/ubp-5.1/out/target/product/hammerhead#

      There is, however, obj/KERNEL_OBJ/include/config/wlan/vendor/mediatek.h. Which is empty.

      Sidenote: I learned of the existence of ppa:ubuntu-toolchain-r/test, which I can use to install newer versions of GCC. No need to compile.

      most ubports devices are flashed aiming at a fixed partition size, dependant on the partition layout that the installer expects at first flash.

      Sounds like more pain.

      1 Reply Last reply Reply Quote 0
      • ?
        A Former User
        last edited by

        Running make ARCH=arm menuconfig and choosing to save on exit results in a .config file being created, which contains a setting to include the module I want. Will try to build with this file present now. So, immediately after the previous build I did this:

        1. make clean in top directory to remove results of previous build.
        2. make ARCH=arm menuconfig in kernel/lge/hammerhead.
        3. mka in top directory to build again.
        1 Reply Last reply Reply Quote 0
        • ?
          A Former User
          last edited by

          It does not like that .config file being there.

           Using /root/ubp-5.1/kernel/lge/hammerhead as source for kernel
  /root/ubp-5.1/kernel/lge/hammerhead is not clean, please run 'make mrproper'
  in the '/root/ubp-5.1/kernel/lge/hammerhead' directory.
Copy: /root/ubp-5.1/out/target/product/hammerhead/system/etc/audio_policy.conf
Copy xml: /root/ubp-5.1/out/target/product/hammerhead/system/etc/mixer_paths.xml
/root/ubp-5.1/kernel/lge/hammerhead/Makefile:976: recipe for target 'prepare3' failed
make[2]: *** [prepare3] Error 1
Makefile:130: recipe for target 'sub-make' failed
make[1]: *** [sub-make] Error 2
make[1]: Leaving directory '/root/ubp-5.1/kernel/lge/hammerhead'
Copy xml: /root/ubp-5.1/out/target/product/hammerhead/system/etc/media_codecs_google_audio.xml
build/core/tasks/kernel.mk:277: recipe for target 'TARGET_KERNEL_BINARIES' failed

          As further evidenced by what running the command it wants does:

          root@ubports:~/ubp-5.1/kernel/lge/hammerhead# make mrproper
  CLEAN   scripts/basic
  CLEAN   scripts/kconfig
  CLEAN   include/config
  CLEAN   .config

          But that file is supposed to be there, and I am doing this correctly, according to this article on kernel configuration.

          1 Reply Last reply Reply Quote 0
          • ?
            A Former User
            last edited by A Former User

            This time I used the make_defconfig.sh script in hammerhead/ instead of make ARCH=arm menuconfig. This script wants a config file from arch/arm/configs/ to edit. The problem is that there are 3 different configs for hammerhead:

            • cyanogenmod_hammerhead_defconfig
            • hammerhead_defconfig
            • tct_hammer_defconfig (I guess this one says "hammer", not "hammerhead")

            When I do uname -a on my Nexus, it says cyanogenmod in there, so I picked that one. Building now.

            1 Reply Last reply Reply Quote 0
            • ?
              A Former User
              last edited by

              Build was successful. Still no driver in the output though.

              root@ubports:~/ubp-5.1/out/target/product/hammerhead# find . |grep -i mt76
root@ubports:~/ubp-5.1/out/target/product/hammerhead# find . |grep -i mediatek
./obj/KERNEL_OBJ/include/config/wlan/vendor/mediatek.h
root@ubports:~/ubp-5.1/out/target/product/hammerhead# cat ./obj/KERNEL_OBJ/include/config/wlan/vendor/mediatek.h
root@ubports:~/ubp-5.1/out/target/product/hammerhead#
              1 Reply Last reply Reply Quote 0
              • ?
                A Former User
                last edited by

                This time I did ./make_defconfig.sh hammerhead_defconfig. Note how the changes made to the cyanogenmod file remain despite make clean and make mrproper:

                	modified:   arch/arm/configs/cyanogenmod_hammerhead_defconfig
	modified:   arch/arm/configs/hammerhead_defconfig

                Another potentially relevant thing I noticed: In the configuration menu provided by make_defconfig.sh, only a Mediatek group is shown. There is no entry for the mt7601u. This was not the case when I used make ARCH=arm menuconfig. Perhaps an indication of a configuration issue that is causing the driver to not be detected? But then why was it detected in the other case? Assuming this build fails to produce the desired result, I will investigate this next.

                1 Reply Last reply Reply Quote 1
                • ?
                  A Former User
                  last edited by

                  I assumed correctly. Here is the section referencing Mediatek in the .config that make_defconfig.sh would generate:

                  CONFIG_WLAN_VENDOR_MEDIATEK=y

                  Compare the Broadcom (I think) drivers section:

                  CONFIG_BCMDHD=y
CONFIG_BCM4339=y
CONFIG_BCMDHD_FW_PATH="/vendor/firmware/fw_bcmdhd.bin"
CONFIG_BCMDHD_NVRAM_PATH="/etc/wifi/bcmdhd.cal"

                  And the Mediatek section in a .config I generated with make ARCH=arm menuconfig:

                  CONFIG_WLAN_VENDOR_MEDIATEK=y
CONFIG_MT7601U=m

                  I'll try to simply manually add these two lines to hammerhead_defconfig and cyanogenmod_hammerhead_defconfig for the next build.

                  1 Reply Last reply Reply Quote 0
                  • ?
                    A Former User
                    last edited by

                    Found this in the mt7601u's Kconfig:

                    	depends on MAC80211
	depends on USB

                    mac80211 is something that can be selected in the config menu in Networking support → Wireless. It is not selected by default. When you select it, the mt7601u driver appears in the Mediatek wireless driver section of the menu as it should.

                    I edited both hammerhead_defconfig and cyanogenmod_hammerhead_defconfig like this (using make_defconfig.sh of course). Building again.

                    1 Reply Last reply Reply Quote 0
                    • ?
                      A Former User
                      last edited by

                      Build finished. Seemingly no change. Maybe out/ is supposed to be like this. Will flash tomorrow and check.

                      1 Reply Last reply Reply Quote 0
                      • ?
                        A Former User
                        last edited by

                        Flashed and checked with lsmod, modinfo and find. It looks like, despite everything, the module was still not installed.

                        1 Reply Last reply Reply Quote 0
                        • ?
                          A Former User
                          last edited by

                          device/lge/hammerhead/BoardConfig.mk confirms that the configuration file I've been working with is the right one:

                          # Define kernel config for inline building
TARGET_KERNEL_CONFIG := cyanogenmod_hammerhead_defconfig
TARGET_KERNEL_SOURCE := kernel/lge/hammerhead

                          device/lge/hammerhead/init.hammerhead.rc has something that could be relevant:

                            # wifi
    chown wifi system /persist/wifi
    insmod /system/lib/modules/bcmdhd.ko

                          I'll add another insmod line for mt7601u and see what happens. My guess is it will either break something or do nothing.

                          1 Reply Last reply Reply Quote 0
                          • ?
                            A Former User
                            last edited by

                            I tried mkap, which failed to push anything to the device, but it did create ./out/target/product/hammerhead/obj/KERNEL_OBJ/include/config/mt7601u.h. I also noticed that all the .h files in obj/KERNEL_OBJ/include/config/ are empty.

                            Flashed, replaced system image, no change.

                            1 Reply Last reply Reply Quote 0
                            • ?
                              A Former User
                              last edited by

                              I am literally unable to tell you what happened next, because all my posts are being flagged as spam.

                              E 1 Reply Last reply Reply Quote 0
                              • E
                                Emphrath @A Former User
                                last edited by

                                @zehkira maybe because of external links. Happens sometimes.

                                1 Reply Last reply Reply Quote 0
                                • ?
                                  A Former User
                                  last edited by

                                  I'm out of ideas.

                                  C 1 Reply Last reply Reply Quote 0
                                  • C
                                    cliffcoggin @A Former User
                                    last edited by

                                    @zehkira I congratulate you on your remarkable persistence, even though I have little understanding of what you have been doing.

                                    1 Reply Last reply Reply Quote 1
                                    • First post
                                      Last post