{"id":28917,"date":"2020-05-30T22:24:59","date_gmt":"2020-05-30T22:24:59","guid":{"rendered":"http:\/\/pcbjunkie.net\/?page_id=28917"},"modified":"2025-10-14T00:33:01","modified_gmt":"2025-10-14T00:33:01","slug":"pj-installing-drivers-on-a-vanilla-linux-setup","status":"publish","type":"page","link":"https:\/\/pcbjunkie.net\/index.php\/pj-installing-drivers-on-a-vanilla-linux-setup\/","title":{"rendered":"PJ – Installing Drivers on a Vanilla Linux Setup"},"content":{"rendered":"\n

Overview:<\/h4>\n\n\n\n

There are two linux drivers provided specifically for use with PJ. A main communication driver (j4b) and a linux joystick driver (pjjoy). Both must be installed for the JAMMA controls and board monitoring to function properly. The driver j4b is the parent module for pjjoy, so when loading the driver modules, j4b must be loaded first.<\/p>\n\n\n\n

Compile drivers module if you are installing this on a vanilla retropie setup as they driver versioning is tied to the kernel and binary kernel driver files will not be provided for every kernel or retropie version.<\/p>\n\n\n\n

Make sure you have this zip file<\/a> already uploaded to your Pi and extracted to your pi home directory (\/home\/pi).

Communication module:<\/strong><\/p>\n\n\n\n

Compile the communication driver module.<\/p>\n\n\n\n

cd \/home\/pi\/linux-modules\/j4b
make clean
make<\/pre>\n\n\n\n
Your output *should* look something like this (kernel version may be different):<\/p>\n\n\n\n
make -C \/lib\/modules\/4.14.98-v7+\/build\/ M=\/home\/pi\/linux-modules\/j4b modules
make[1]: Entering directory '\/usr\/src\/linux-headers-4.14.98-v7+'
  CC [M]  \/home\/pi\/linux-modules\/j4b\/j4b.o
  Building modules, stage 2.
  MODPOST 1 modules
  CC      \/home\/pi\/linux-modules\/j4b\/j4b.mod.o
  LD [M]  \/home\/pi\/linux-modules\/j4b\/j4b.ko
make[1]: Leaving directory '\/usr\/src\/linux-headers-4.14.98-v7+'<\/pre>\n\n\n\n
Install binary driver module (kernel_version can be obtained by running uname -r):<\/p>\n\n\n\n
sudo cp j4b.ko \/lib\/modules\/<kernel_version>\/kernel\/drivers\/gpio\/<\/pre>\n\n\n\n
Joystick module:<\/strong><\/p>\n\n\n\n
Compile the module:<\/p>\n\n\n\n
cd \/home\/pi\/linux-modules\/pjjoy
make clean
make<\/pre>\n\n\n\n
Typical compiler output:<\/p>\n\n\n\n
cp \/home\/pi\/linux-modules\/j4b\/Module.symvers \/home\/pi\/linux-modules\/pjjoy\nmake -C \/lib\/modules\/4.14.98-v7+\/build M=\/home\/pi\/linux-modules\/pjjoy modules\nmake[1]: Entering directory '\/usr\/src\/linux-headers-4.14.98-v7+'\n  CC [M]  \/home\/pi\/linux-modules\/pjjoy\/pjjoy.o\n  Building modules, stage 2.\n  MODPOST 1 modules\n  CC      \/home\/pi\/linux-modules\/pjjoy\/pjjoy.mod.o\n  LD [M]  \/home\/pi\/linux-modules\/pjjoy\/pjjoy.ko\nmake[1]: Leaving directory '\/usr\/src\/linux-headers-4.14.98-v7+'<\/pre>\n\n\n\n
Install driver module (kernel_version can be obtained by running uname -r):<\/p>\n\n\n\n
sudo cp pjjoy.ko \/lib\/modules\/<kernel_version>\/kernel\/drivers\/input\/<\/pre>\n\n\n\n
Backup your \/etc\/modules file:<\/p>\n\n\n\n
cp \/etc\/modules \/etc\/modules.bak<\/pre>\n\n\n\n
Add these lines to \/etc\/modules:<\/p>\n\n\n\n
j4b
pjjoy<\/pre>\n\n\n\n
Finally run:<\/p>\n\n\n\n
depmod -a
reboot<\/pre>\n\n\n\n
Upon reboot, make sure your joystick driver modules are loaded… to confirm type:<\/p>\n\n\n\n
lsmod<\/pre>\n\n\n\n
You should get a listing of modules which includes “j4b” and “pjjoy”:<\/p>\n\n\n\n
Module                  Size  Used by\ncfg80211              573440  0\nrfkill                 28672  2 cfg80211\nsnd_bcm2835            32768  0\nsnd_pcm                98304  1 snd_bcm2835\nsnd_timer              32768  1 snd_pcm\nsnd                    69632  3 snd_timer,snd_bcm2835,snd_pcm\npwm_bcm2835            16384  0\nuio_pdrv_genirq        16384  0\nuio                    20480  1 uio_pdrv_genirq\nfixed                  16384  0\nevdev                  24576  4\njoydev                 20480  0\npjjoy                  16384  0<\/strong>\nj4b                    16384  1 pjjoy<\/strong>\nuinput                 20480  0\nip_tables              24576  0\nx_tables               32768  1 ip_tables\nipv6                  425984  28<\/pre>\n\n\n\n
If any issues occur loading the drivers this way, try doing in manually:<\/p>\n\n\n\n
cd \/home\/pi\/linux-modules\/j4b
sudo insmod j4b.ko<\/pre>\n\n\n\n
cd \/home\/pi\/linux-modules\/pjjoy
sudo insmod pjjoy.ko<\/pre>\n\n\n\n
If any issues check \/var\/log\/debug for more info, and verify that the module was loaded using lsmod.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview: There are two linux drivers provided specifically for use with PJ. A main communication driver (j4b) and a linux joystick driver (pjjoy). Both must be installed for the JAMMA controls and board monitoring to function properly. The driver j4b is the parent module for pjjoy, so when loading the driver modules, j4b must be … <\/p>\n
Continue reading “PJ – Installing Drivers on a Vanilla Linux Setup”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-28917","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/pages\/28917","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/comments?post=28917"}],"version-history":[{"count":3,"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/pages\/28917\/revisions"}],"predecessor-version":[{"id":36528,"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/pages\/28917\/revisions\/36528"}],"wp:attachment":[{"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/media?parent=28917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}