Linux/TMS320C6678: Problem on reboot Linux c6x

ebi alinejad

Expert 1060 points

Part Number: TMS320C6678

Tool/software: Linux

Hi to All

i have problem with reboot Linux c6x (c6678 EVM & JFFS2 filesystem ).

first solution :

using reboot command :)

COM console:

after reboot command i expect that system reset and boot from NAND FLASH again but nothing happened (nothing print in COM console.i can ping IP , but i can't connect to board using Telnet)

second solution:

i try to reset chip using RSTCTRL register according to this post , C code for reset (compiled with c6x-uclinux-gcc)

printf("Reset 2.0 !!! \n");

volatile unsigned int * pRSTCTRL = (volatile unsigned int *) (0x023100E8);
printf("before *pRSTCTRL =%8.8x \n",*pRSTCTRL);
volatile unsigned int Key = 0x5A69;
*pRSTCTRL = Key;
printf("after *pRSTCTRL =%8.8x \n",*pRSTCTRL);
*pRSTCTRL = 0;

output:

nothing happened and RSTCTRL remained lock !!! (i think Linux haven't write permision on RSTCTRL Register)

when i compiling code with CCS (cl6x) and load on core 5 (Linux c6x runing on core 0) , RSTCTRL unlocked (RSTCTRL value (*0x023100E8) changed to 0x0001000C) and chip (8 core) reset correctly and Linux reboot on core 0

but i need to reboot from Linux (core 0) , not sys/bios side (core 1-7)

anybody can help me reboot my Linux c6x ?

thanks

Ebi

over 8 years ago

0 Yordan Kovachev over 8 years ago

TI__Guru**** 161600 points

Hi,

I've notified the C66x team. Their feedback will be posted directly here.

Best Regards,
Yordan

0 ebi alinejad over 8 years ago in reply to Yordan Kovachev

Expert 1060 points

thanks Yordan !

0 Rex Chang over 8 years ago in reply to ebi alinejad

TI__Guru 50170 points

Hi, Ebi,

Looking at the keystone_reset() function, it seems the function does what it should do. You may try to see if it makes any difference by setting RSTCFG as well.

Rex

0 ebi alinejad over 8 years ago in reply to Rex Chang

Expert 1060 points

Hi Rex

thanks for your reply and sorry for replying late !

Rex Chang said:
Looking at the keystone_reset() function, it seems the function does what it should do.

i can't find keystone_reset() function in my Linux c6x source file , in google search i can find "TI keystone reboot driver" :

according to file comment , this driver written in 2014 but latest Linux c6x release related to 2012 !!!

can you please confirm that i find correct file ?

thanks

Ebi

0 Rex Chang over 8 years ago in reply to ebi alinejad

TI__Guru 50170 points

HI, Ebi,

Is your code from 2.0.0.63 release? You may want to get the newer code from linux-c6x git repository. It is shown under Resources section of linux-c6x wiki page. Please be advised that TI has stopped the project and its support 2 years ago. The state of the repository is as is.

For your convenience, here is the link to the repository: linux-c6x.org/.../

Rex

0 ebi alinejad over 8 years ago in reply to Rex Chang

Expert 1060 points

Hi Rex
Yes i'm using 2.0.0.63 release
I work around reboot problem using Watchdog (due to time constraints)

thanks for useful information and links , i try to update source file and rebuild Linux but i come from microcontroller/microprocessor programming with RTOS (or non-OS) and I am a newbie in Embedded Linux Development !

Best Regards
Ebi

0 ebi alinejad over 8 years ago in reply to Rex Chang

Expert 1060 points

Hi Rex

after git clone the latest code from repository and rebuild project , problem resolved and software reboot work correctly !

reboot command added based on pllctrl at this commit !

thanks for support

Ebi

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Linux/TMS320C6678: Problem on reboot Linux c6x