CAN resource is not owned in the IMX8QM MEK as i am using imx-p9.0.0_2.0.0-ga version of code?

[pooja1401]

I am using imx-p9.0.0_2.0.0-ga version of IMX8QM MEK board. I want to enable the FLEXCAN resource . But in this version of code it is saying CAN resource is not owned. I am trying to enable in u-boot  changing status is "okay" but it is disabling the resource by reverting back the status. It is saying "Disabled CAN ,resource id not owned". I have tried to enable this in IMX8QXP MEK board also with imx-p9.0.0_2.0.0-ga latest version but in this also it is saying "resource not owned".

Kindly help me How to own Flexcan resource in this version imx-p9.0.0_2.0.0-ga as we need to use the latest version of code.

FYI In previous version imx-p9.0.0_1.0.0-ga this CAN resource is enabled by default.

I have tried to use mx8qm.scfw.tcm.bin  binary file of imx-p9.0.0_1.0.0-ga version of code with my version of code imx-p9.0.0_2.0.0-ga by replacing my mx8qm.scfw.tcm.bin file. But it is not booting with my code. I have read somewhere to change this scfw.bin file flexcan would work . So i have tried with working version of imx-p9.0.0_1.0.0-ga binary file. I am getting stuck at u-boot time.
Can anyone suggest or tell how this issue is resolved?

Can anyone tell how the flexcan resource is owned?

[pooja1401]

Hi,

We found this one and changed the settings and it worked .

Thanks for your support .

[jack-cap]

how to build scfw_tcm.bin ? thanks!

[pooja1401]

It has given on nxp site you can google it. or follow this link:-

https://community.nxp.com/docs/DOC-343178

[jack-cap]

modified as flows:

rm_set_resource_movable(pt_boot, SC_R_CAN_0, SC_R_CAN_2, SC_FALSE);

rm_set_resource_movable(pt_boot, SC_P_FLEXCAN0_RX, SC_P_FLEXCAN2_TX, SC_TRUE);

build scfw_tcm.bin and flash to emmc, I find that ifconfig command has can0-can2 result. but can send fail!

Is there anything else that needs to be modified ? Thanks.

[manuelrodriguez]

You need to delete the lines marking the resource AND pads as movable, OR change it to not mark it as movable, although that step is redundant since all pads/resources are marked as not movable at the top of the function:

/* Mark all resources as not movable */
BRD_ERR(rm_set_resource_movable(pt_boot, SC_R_ALL, SC_R_ALL,
SC_FALSE));
BRD_ERR(rm_set_pad_movable(pt_boot, SC_P_ALL, SC_P_ALL,
SC_FALSE));‍‍‍‍‍‍‍‍‍‍

I have updated the following document with an example doing this:

https://community.nxp.com/docs/DOC-341481 

[Bio_TICFSL]

Hello Pooja,

I guess FlexCAN resource was moved in SCFW since imx-p9.0.0_1.0.0-ga (L4.14.78 kernel).

Could you please check if the FlexCAN node is enabled (status = "okay") in kernel?

If so, could you please try setting the CAN resource as non-movable in SCFW source code and building it again?

Change:

   rm_set_resource_movable(pt_boot, SC_R_CAN_0, SC_R_CAN_2, SC_TRUE);

To:

   rm_set_resource_movable(pt_boot, SC_R_CAN_0, SC_R_CAN_2, SC_FALSE);

This line sets the CAN resources as non-movable so this won't be assigned to M4 owner.

Let me know if this works.

[shabna_m]

@Bio_TICFSL 

I have downloaded imx-scfw-porting-kit-1.2 for imx-4.14.98-2.0.0_ga (is that the correct pair?) and

removed the following lines from the board.c:

BRD_ERR(rm_set_resource_movable(pt_boot, SC_R_CAN_0, SC_R_CAN_2, SC_TRUE));

BRD_ERR(rm_set_pad_movable(pt_boot, SC_P_FLEXCAN0_RX, SC_P_FLEXCAN2_TX, SC_TRUE));

Build the scfw_tcm.bin and copied it to the imx8qmek .

Checked flexcan is enabled in dts of u-boot as well as in kernel.

In menuconfig also, it is enabled.and run bitbake fsl-image-qt5-validation-imx.

Booted the Image from sdcard. 

In the bootlog the following logs disappeared.

Disable can@5a8d0000, resource id 105 not owned

Disable can@5a8e0000, resource id 106 not owned

Disable can@5a8f0000, resource id 107 not owned.

But Ifconfig -a didn't list the can interfaces.

Please help me on this

[shabna_m]

@@Bio_TICFSL 

Hi,

I think, for the working of CAN we need i2c@3b230000 also.

But it is disabled from the bootloader. Log as follows

Disable i2c@3b230000, resource id 308 not owned.

Could someone please help to get it enabled in the linux partition?

[pooja1401]

Hi,

I have tried to use mx8qm.scfw.tcm.bin  binary file of imx-p9.0.0_1.0.0-ga version of code with my version of code imx-p9.0.0_2.0.0-ga by replacing my mx8qm.scfw.tcm.bin file. But it is not booting with my code.

Can anyone please help me how to resolve this issue? How i can use other scfw.bin file with my code?

Please reply as soon as poosilobe.