topic Re: imx6 - USB OTG device testing in i.MX Processors

imx6 - USB OTG device testing

Ansari — Sun, 07 Sep 2014 10:31:11 GMT

Dear support team,

We are using imx6Q sabresd platform for our development with Linux 3.10.17_1.0.0-GA BSP.

We need to test the USB OTG as a device. For the same we tried to insert the mass storage driver in the kernel. We are not able to test the USB OTG as device.
I have copied the error log here for your reference.

root@imx6qsabresd:~# insmod g_mass_storage.ko file=/dev/mmcblk1p1
g_mass_storage: Unknown symbol usb_interface_id (err 0)
g_mass_storage: Unknown symbol usb_assign_descriptors (err 0)
g_mass_storage: Unknown symbol usb_string_id (err 0)
g_mass_storage: Unknown symbol usb_string_ids_tab (err 0)
g_mass_storage: Unknown symbol usb_composite_unregister (err 0)
g_mass_storage: Unknown symbol config_ep_by_speed (err 0)
g_mass_storage: Unknown symbol usb_add_function (err 0)
g_mass_storage: Unknown symbol usb_composite_probe (err 0)
g_mass_storage: Unknown symbol usb_composite_overwrite_options (err 0)
g_mass_storage: Unknown symbol usb_composite_setup_continue (err 0)
g_mass_storage: Unknown symbol usb_ep_autoconfig (err 0)
g_mass_storage: Unknown symbol usb_add_config (err 0)
g_mass_storage: Unknown symbol usb_free_all_descriptors (err 0)
insmod: ERROR: could not insert module g_mass_storage.ko: Unknown symbol in module

Please help us to test the same. In case, If we do wrong suggest us.

Thank You,
Regards,
Ansari

Re: imx6 - USB OTG device testing

igorpadykov — Sun, 07 Sep 2014 23:23:36 GMT

Hi Abdul

I would suggest to check if correct usb connector was used (for Device mode

with ID signal high or float) and look at link below

Issue with USB OTG in device mode with mass storage gadget driver in i.MX6

Best regards

chip

Re: imx6 - USB OTG device testing

Ansari — Mon, 08 Sep 2014 13:14:46 GMT

Dear Chip,

Thanks for your input. Please find our test cases as below,

Case1:

======

I downloaded the binaries from the below mentioned link and tested USB OTG as device with this downloaded binaries and result is same.

https://www.freescale.com/webapp/sps/download/license.jsp?colCode=L3.10.17_1.0.0_IMX6QDLS_BUNDLE&appType=file1&location=null&DOWNLOAD_ID=null

Commands used to test USB OTG as device:

insmod /lib/modules/3.10.17-1.0.0_ga+g232293e/kernel/drivers/usb/gadget

t/g_mass_storage.ko file=/dev/mmcblk1p2

Case 2:

======

Compile the Linux kernel source code (linux-3.10.17 GA release) using the following commands to generate the binaries.

make imx_v7_defconfig;make;make uImage LOADADDR=0x10800000

Tested the OTG with the generated uImage and module(drivers/usb/gadget/g_mass_storage.ko). The result is same.

Case 3:

======

Checked the below link for this issue but with out any success.

https://community.freescale.com/message/433234#433234

The link suggested for enabling the macro USB_CHIPIDEA_UDC (ChipIdea device controller) which was already enabled.

In addition, We are using imx6Q sabreSD board for testing.

We assume that the driver module (g_mass_storage.ko) can be inserted with out connecting the USB OTG device cable. Here our problem is driver module itself not able to insert.

Please suggest us.

Thank You,

Regards,

Ansari

Re: imx6 - USB OTG device testing

igorpadykov — Mon, 08 Sep 2014 14:37:17 GMT

Hi Abdul

then what is about modprobe, is it working ?

$ modprobe g_mass_storage file=./backing_file

there are unit tests (imx-test-3.10.17-1.0.0) in demo images, it

hold all module tests.

Best regards

chip

Re: imx6 - USB OTG device testing

Ansari — Mon, 08 Sep 2014 16:05:46 GMT

Hi Chip,

Thanks for your input.

The below command not giving any error and the mass storage device is not connected to the host PC.

$modprobe g_mass_storage file=/dev/mmcblk1p1

In addition, we are getting below prints when we connect/remove the USB OTG device cable with host PC.

root@imx6qdlsolo:~# max8903-charger max8903.18: USB Charger Connected.

max8903-charger max8903.18: USB Charger Disconnected.

Let us check once with "unit_tests" module test.

Thank You,

Regards,

Ansari

Re: imx6 - USB OTG device testing

Ansari — Wed, 10 Sep 2014 16:52:26 GMT

Hi chip,

We are waiting for your valuable input on this issue.

Thank You,

Regards,

Ansari

Re: imx6 - USB OTG device testing

igorpadykov — Sun, 14 Sep 2014 14:41:24 GMT

what is about settings

CONFIG_USB_CHIPIDEA

CONFIG_USB_GADGET

CONFIG_USB_MXS_PHY

~igor

Re: imx6 - USB OTG device testing

Ansari — Mon, 15 Sep 2014 08:24:26 GMT

Hi Igor,

The below configurations are enabled in the Linux kernel by default.

CONFIG_USB_CHIPIDEA

CONFIG_USB_GADGET

CONFIG_USB_MXS_PHY

Thank You,

Regards,

Ansari

Re: imx6 - USB OTG device testing

igorpadykov — Mon, 15 Sep 2014 10:29:35 GMT

Hi Ansari

please check link below

https://github.com/rabeeh/android-imx6-kitkat/blob/master/platform/external/linux-test.git/0301-ENGR00179054-add-USB-test-docs.patch

just for example it has build settings as below:

CONFIG_USB_HID=m

CONFIG_USB_HIDINPUT = y

what settings below in your build : ?

CONFIG_USB_CHIPIDEA

CONFIG_USB_GADGET

CONFIG_USB_MXS_PHY

~igor

Re: imx6 - USB OTG device testing

Ansari — Mon, 15 Sep 2014 14:29:29 GMT

Hi Igor,

We have not changed the Linux kernel source code and the kernel configuration file. we have executed below command to configure the kernel (which is default)

$make imx_v7_defconfig

With this default configuration, find the below settings of the kernel configuration

CONFIG_USB_CHIPIDEA = y

CONFIG_USB_GADGET = y

CONFIG_USB_MXS_PHY = y

Thanks You,

Regards,

Ansari

Re: imx6 - USB OTG device testing

igorpadykov — Tue, 16 Sep 2014 06:45:36 GMT

you can try to change

y --> m

and check

~igor

Re: imx6 - USB OTG device testing

Ansari — Tue, 16 Sep 2014 15:51:00 GMT

Hi Igor,

Thanks for your input.

We have changed the configuration as mentioned below. But the result same.

CONFIG_USB_CHIPIDEA = m

CONFIG_USB_GADGET = m

CONFIG_USB_MXS_PHY = m

Please find the command executed and the following error.

root@imx6qsabresd:~#insmod g_mass_sotrage.ko file=/dev/mmcblk1p1
g_mass_storage: Unknown symbol usb_interface_id (err 0)
g_mass_storage: Unknown symbol usb_assign_descriptors (err 0)
g_mass_storage: Unknown symbol usb_string_id (err 0)
g_mass_storage: Unknown symbol usb_string_ids_tab (err 0)
g_mass_storage: Unknown symbol usb_composite_unregister (err 0)
g_mass_storage: Unknown symbol config_ep_by_speed (err 0)
g_mass_storage: Unknown symbol usb_add_function (err 0)
g_mass_storage: Unknown symbol usb_composite_probe (err 0)
g_mass_storage: Unknown symbol usb_composite_overwrite_options (err 0)
g_mass_storage: Unknown symbol usb_composite_setup_continue (err 0)
g_mass_storage: Unknown symbol usb_ep_autoconfig (err 0)
g_mass_storage: Unknown symbol usb_add_config (err 0)
g_mass_storage: Unknown symbol usb_free_all_descriptors (err 0)
insmod: ERROR: could not insert module g_mass_storage.ko: Unknown symbol in module

Thank You,

Regards,

Ansari

Re: imx6 - USB OTG device testing

Ansari — Wed, 17 Sep 2014 06:50:46 GMT

Hi Igor,

We are able to successfully insert the g_mass_storage.ko file without changing the default kernel configuration (imx_v7_defconfig).

The steps are below

/lib/modules/3.10.17-1.0.0_ga+g2a69800/kernel/$insmod fs/configfs/configfs.ko

/lib/modules/3.10.17-1.0.0_ga+g2a69800/kernel/$insmod drivers/usb/gadget/libcomposite.ko

/lib/modules/3.10.17-1.0.0_ga+g2a69800/kernel/$insmod drivers/usb/gadget/g_mass_storage.ko

Thank You,

Regards,

Ansari

Re: imx6 - USB OTG device testing

bertrandmarquis — Wed, 19 Aug 2015 14:50:55 GMT

Hi,

We are using a Sabre SD board and try to make the USB Gadget running and we have the same message coming out on the console:

max8903-charger max8903.18: USB Charger Connected.

max8903-charger max8903.18: USB Charger Disconnected.

On the PC connected to the target we have a device detected but after a second we have a disconnected message on "dmesg" and over and over the device gets connected and disconnected on the host PC. During the interval we manage to mount what we exported through USB from the device but we get disconnected.

We also have a sabre Lite board and using the same image (with the appropriate DTB) the problem is not happening.

We are using the last git version of linux 3.10

Any idea where this is coming from and how to solve it ?

Thanks

Bertrand