Mity CPU Platforms » MityDSP-L138 (ARM9 Based Platforms)

USB gadgets are built as modules.
Here's a link to a TI page on building the usb ethernet gadget module
http://processors.wiki.ti.com/index.php/UsbConfigDevRNDIS

cheers
/Tim

Followed ths teps in the above document. The gadget options under usb are missing. attached is a screen shot.
Cannot generate the gadget if the option is are not availbale. Downloaded the latest version of mitydsp kernel.

If you have the latest version of the kernel, then do a

make ARCH=arm CROSS_COMPILE=arm-angstrom-linux-gnueabi- industrialio_defconfig

Gadget support should be enabled by default for this configuration in the mitydsp-linux-v3.2 branch of the kernel.

-Mike

Downloaded the latest Linux-DaVinci v fce1b66 from Critical Link website. The kernel is n2.26.32, not version 3.2.
How Do I get the v3,2 kernel from your web site ? Do I get the generice v3.2 from source forge etc. ?
Krishna

Downloaded the latest Linux-DaVinci v fce1b66 from Critical Link website. The kernel is n2.26.32, not version 3.2.
How Do I get the v3,2 kernel from your web site ? Do I get the generice v3.2 from source forge etc. ?
Krishna

You need to checkout the mitydsp-linux-v3.2 branch. (the master branch is the older branch).

git checkout -b mitydsp-linux-v3.2 mitydsp-linux-v3.2

-Mike

was able to download kernel v3.2. from the mitydsp site.
Was able to generate the usb gadget, when the usb gadget was selected, it put out a message that it will be generated as a module.
defaults were chosen for all other options.

attempting to insert puts out this message:
insmod g_ether.ko
insmod: error inserting 'g_ether.ko': -1 Invalid module format
root@mityomapl138:/#

what is wrong?
Does the kernel need to be reflashed?

Krishna

That error typically means you are trying to load a module built against a different version of the kernel.
Verify that the module was built against the same version of kernel you are running.
cheers
/Tim

The kernel version on the board is 2.6.34rc1:

root@mityomapl138:/# uname -r
2.6.34-rc1

The USB gadgets are available on 3.2 kernels or later.
I used the version linux-davinci-b0045c9.

Does it mean the booard has to be reflashed?
How do you generate a new bootable image from the new kernel?

How do you flash it?
For safety, whereis the current image available?

Thanks
Krishna

Hi Krishna,

I would recommend using an NFS mount or TFTP server for loading up a new kernel and/or filesystem.

See "boot from an NFS server" on this page:

http://support.criticallink.com/redmine/projects/arm9-platforms/wiki/Linux_Root_File_System

This page also covers setting up an NFS shared filesystem.

Normally, we develop using an NFS mounted filesystem and once we're happy with the kernel and performance we then prep to FLASH the device SPI-NOR or NAND FLASH.

-Mike

Built the uImage, downloaded, and boot.
It does nor complete boot process. It hangs

In the configuration, the only change was adding usb gadget for ethernet.
Took the defaults for make.

How Do I diagnose the problem?
Krishna

1. Booting kernel from Legacy Image at c0700000 ...
   Image Name: Linux-3.2.0
   Image Type: ARM Linux Kernel Image (uncompressed)
   Data Size: 2575032 Bytes = 2.5 MB
   Load Address: 00008000
   Entry Point: 00008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
   OK

Starting kernel ...

Generated a new kernel as per instructions. The meuconfig and make uImage were uneventful - normal. The kernel version is 3.2.0, It was flashed on to to the board.

However the ethernet gadget is missing. Copied g_ether.ko from the host - same version it was built from.
Attempted to install it. Same error as before:

root@mityomapl138:/# ls
bin ftditset linuxrc sbin tmp var
boot g_ether.ko media sys udpclient
dev home mnt tcpclient udpserver
etc lib proc tcpserver usr
root@mityomapl138:/# uname -r
3.2.0
root@mityomapl138:/# lsmode
-sh: lsmode: not found
root@mityomapl138:/# lsmod
Module Size Used by
root@mityomapl138:/# insmod g_ether.ko
insmod: error inserting 'g_ether.ko': -1 Invalid module format
root@mityomapl138:/#

What could be the problem this time?

The only way to get an invalid module format is if the kernel and modules aren't build from the same source / configuration / tree.

You might be explicit with your module load, e.g.

insmod ./g_ether.ko

You might also md5sum the uImage you are booting and building, as well as the g_ether.ko you copied and the one you are insmod'ing.

Did you do a:

make ARCH=arm CROSS_COMPILE=arm-angstrom-linux-gnueabi- uImage modules

in order to ensure that the uImage and modules were built? You might even do a

make ARCH=arm CROSS_COMPILE=arm-angstrom-linux-gnueabi- clean uImage modules

to be completely sure that everything is being build correctly.

Ideally, you should be installing the modules in the /lib/modules/`uname -r`/ path and doing to depmod -a followed by a modprobe in order to ensure that all the module dependencies are being picked up.

-Mike

Succussfully generated and installed g_ether.ko on the mitydsp board, and configured the usb0 withe an ip adrees. Thanks.

Attempted to do the sam thing on the host. It is missing the driver.

mitydsp@mitydsp-dev:/lib/modules/2.6.32-42-generic/kernel/drivers/usb/gadget$ uname -r
2.6.32-42-generic

mitydsp@mitydsp-dev:/lib/modules/2.6.32-42-generic/kernel/drivers/usb/gadget$ sudo insmod g_ether.ko
insmod: error inserting 'g_ether.ko': -1 Unknown symbol in module
mitydsp@mitydsp-dev:/lib/modules/2.6.32-42-generic/kernel/drivers/usb/gadget$

Attempted generate the module:

make oldconfig
make menuconfig

mitydsp@mitydsp-dev:/usr/src/linux-headers-2.6.32-42-generic$ sudo make ARCH=x86 modules CHK include/linux/version.h
CHK include/linux/utsrelease.h
SYMLINK include/asm -> include/asm-x86
make¹: * No rule to make target `kernel/bounds.c', needed by `kernel/bounds.s'. Stop.
make: * [prepare0] Error 2

Are the paths wrong ? Are the modules missing ?

Krishna

Need help with the Linux kernel:
Generated the usb gadget, but cannot install it.

mitydsp@mitydsp-dev:~/workspace/craigs-lib$ uname -r
2.6.32-45-generic

make oldconfig
Make newconfig generated usb gadget for ethernet.

sudo insmod -f g_ether.ko
insmod: error inserting 'g_ether.ko': -1 Unknown symbol in module

How do you boot from a different Linux kernel in VM box?
Grub folder does not have any options.
There is no grub.conf in /etc either.

Response to file, and ldd:

mitydsp@mitydsp-dev:/linux-2.6.32/drivers/usb/gadget$ file g_ether.ko
g_ether.ko: ELF 32-bit LSB relocatable, Intel 80386, version 1 (SYSV), not stripped
mitydsp@mitydsp-dev:/linux-2.6.32/drivers/usb/gadget$ ldd g_ether.ko
not a dynamic executable
mitydsp@mitydsp-dev:/linux-2.6.32/drivers/usb/gadget$