how to compile a wifi driver?

lanwairen123

lsusb shows:

1. #lsusb
   
2. ID 0bda:8179 Realtek Semiconductor Corp.

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and dmesg shows:

1. usbcore: registered new interface driver rtl8192cu

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but ifconfig -a can't see my wifi device , so I want to recompile the rtl8192cu driver , and add the device ID to os_dep/linux/usb_intf.c,

1. git clone --depth 1 https://github.com/Bananian/linux-bananapi.git

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I use this source tree to compile like this

1. make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- sun7i_defconfig

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1. make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- uImage modules

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1. make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -C /root/linux-bananapi/ SUBDIRS=/root/linux-bananapi/drivers/net/wireless/rtl8192cu modules

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and I got a 8192cu.ko file, and I copy it to my banana pi ,rename it to rtl8192cu.ko ,run rmmod 8192cu to remove the old driver,and then run insmod ./rtl8192cu.ko but it shows

1. Error: could not insert module rtl8192cu.ko: Invalid module format

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I think it is because the version of kernel is diff,but I clone it from the official site,I don't know why ,anyone can help me?

1. file rtl8192cu.ko
   
2. rtl8192cu.ko: ELF 32-bit LSB relocatable, ARM, version 1 (SYSV), BuildID[sha1]=0x67b3f2a2417051d7a3fbd79d487b7c301b8b47e9, not stripped

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1. file rtl8192cu/8192cu.ko
   
2. rtl8192cu/8192cu.ko: ELF 32-bit LSB relocatable, ARM, version 1 (SYSV), BuildID[sha1]=0x2f9a3358b448b53f144640e286a064302b63196e, not stripped

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I'm very sorry for my pool english.

igorpec

https://github.com/dz0ny/rt8192cu

This is the best I could find but I think it's not working in 3.4 ... I was able to use it on 3.14 with only around 5-6% packet lost.

lanwairen123

Reply 2# igorpec


   I see os_dep/linux/usb_intf.c file, it does't have ID 0bda:8179 in ,so It may not work on my device, but I want to know How you compile it?

igorpec

$LINUXSOURCE is path to your kernel source

git clone https://github.com/dz0ny/rt8192cu
cd rt8193cu
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- KSRC=$LINUXSOURCE

cp *.ko somewhere
cp blacklist*.conf to modprobe.d directory

insmod thismodule.ko

lanwairen123

Reply 4# igorpec


   I compile it just like you ,but it still shows

1. Error: could not insert module rtl8192cu.ko: Invalid module format

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lanwairen123

Reply 5# igorpec


   I compile it just like you ,but it still shows

• Error: could not insert module rtl8192cu.ko: Invalid module format

tony_zhang

I suggest you replace all the uImage and modules into the system. not just a .ko file

lanwairen123

Reply 7# tony_zhang


   all right.I just want to install a wireless driver , but as you said I must compile all the source tree,such as kernel and modules,It may be a large project for me ,why can't like others just compile the driver and install it? any way ,I'll have a try.

tony_zhang

As the rtl8192cu,ko depends on something in kernel, so we need replace all files.

igorpec

Reply 8# lanwairen123


   I recompiled my image (1.3) with this driver included.

You can find it here:

1. /usr/local/bin/8192cu.ko

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