USB OTG device mode not working in imx6ul Target Board

[sourabhdas]

Hi we have our imx6ul Target board. USB OTG host mode is working fine.

But to check the USB OTG device mode, we are inserting the modules: configfs.ko, libcomposite.ko and g_mass_storage.ko.

While doing "insmod g_mass_storage.ko", it is giving the following errors:

g_mass_storage: Unknown symbol fsg_common_set_ops (err 0)
g_mass_storage: Unknown symbol fsg_common_set_sysfs (err 0)
g_mass_storage: Unknown symbol fsg_common_run_thread (err 0)
g_mass_storage: Unknown symbol fsg_common_free_luns (err 0)
g_mass_storage: Unknown symbol fsg_common_create_luns (err 0)
g_mass_storage: Unknown symbol fsg_common_set_cdev (err 0)
g_mass_storage: Unknown symbol fsg_common_free_buffers (err 0)
g_mass_storage: Unknown symbol fsg_common_set_nluns (err 0)
g_mass_storage: Unknown symbol fsg_common_remove_luns (err 0)
g_mass_storage: Unknown symbol fsg_common_set_inquiry_string (err 0)
g_mass_storage: Unknown symbol fsg_common_set_num_buffers (err 0)
g_mass_storage: Unknown symbol fsg_config_from_params (err 0)
insmod: ERROR: could not insert module drivers/usb/gadget/legacy/g_mass_storage.ko: Unknown symbol in module

Please suggest something on this.

[sourabhdas]

Hi Igor,

This error has been solved. Actually one dependent module "usb_f_mass_storage.ko" insertion was missing.

cd /lib/modules/4.1.15-1.2.0+g77f6154/kernel
insmod fs/configfs/configfs.ko
insmod drivers/usb/gadget/libcomposite.ko
insmod drivers/usb/gadget/function/usb_f_mass_storage.ko
insmod drivers/usb/gadget/legacy/g_mass_storage.ko file=/dev/mmcblk0p2

Now this is working fine.

[igorpadykov]

Hi Sourabh

for usb testing one can look at sect.39.2.6 Changing the Controller Operation Mode

attached Linux Manual and use unit test (imx-test package, folder /mxc_usb_test)

www.nxp.com/lgfiles/NMG/MAD/YOCTO/imx-test-5.4.tar.gz

with Demo Image

http://www.nxp.com/webapp/Download?colCode=L4.1.15_2.0.0_iMX6UL&appType=license&location=null&Parent... 

Best regards
igor
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