Boot issues with imx6

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Boot issues with imx6

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kevin_chaves
Contributor III

I'm not really sure what the problem could be but we currently have a pretty big problem. Basically our custom boards have a pretty low yield due to a very random boot issue. Everything from unrecognized instruction to the system just halting during the boot process. I included some outputs below. The failures are pretty spread out and the only thing i can think of is we have some bad CPU's or maybe ddr.

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz

Reset cause: POR

Board: MX6Q-Camaro

DRAM:  1 GiB

MMC:   FSL_SDHC: 0, FSL_SDHC: 1

SF: Detected S25FL512SA with page size 64 KiB, total 64 MiB

*** Warning - bad CRC, using default environment

## Booting kernel from Legacy Image at 80800000 ...

   Image Name:   Linux-3.0.35-ts-armv7l

   Image Type:   ARM Linux Kernel Image (uncompressed)

   Data Size:    3575448 Bytes = 3.4 MiB

   Load Address: 80008000

   Entry Point:  80008000

   Verifying Checksum ... OK

   Loading Kernel Image ... OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

Error: unrecognized/unsupported processor variant (0x412fc09a).

## Booting kernel from Legacy Image at 80800000 ...

   Image Name:   Linux-3.0.35-ts-armv7l

   Image Type:   ARM Linux Kernel Image (uncompressed)

   Data Size:    3575448 Bytes = 3.4 MiB

   Load Address: 80008000

   Entry Point:  80008000

   Verifying Checksum ... OK

   Loading Kernel Image ... OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

U-Boot 2013.07 (Mar 12 2014 - 11:46:23)

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz

Reset cause: POR

Board: MX6Q-Camaro

DRAM:  1 GiB

MMC:  

## Booting kernel from Legacy Image at 80800000 ...

   Image Name:   Linux-3.0.35-ts-armv7l

   Image Type:   ARM Linux Kernel Image (uncompressed)

   Data Size:    3575448 Bytes = 3.4 MiB

   Load Address: 80008000

   Entry Point:  80008000

   Verifying Checksum ... Bad Data CRC

ERROR: can't get kernel image!

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz

Reset cause: POR

Board: MX6Q-Camaro

DRAM:  1 GiB

MMC:   FSL_SDHC: 0, FSL_SDHC: 1

SF: Detected S25FL512SA with page size 64 KiB, total 64 MiB

himport_r: can't insert "netargs=setenv bootargs console=${console},${baudrate} root=/dev/nfs ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp" ie

U-Boot 2013.07 (Mar 12 2014 - 11:46:23)

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz

Reset cause: POR

Board: MX6Q-Camaro

DRAM:  1 GiB

MMC:   FSL_SDHC: 0, FSL_SDHC: 1

SF: Detected S25FL512SA with page size 64 KiB, total 64 MiB

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sivaalagarsamy
Contributor II

This  thread Custom iMX6 board SDRAM DDR2 Config OpenOCD/JTAG  may be useful to you. I noticed that the DRAM start address is 0x10000000 and not 0x80000000

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Yuri
NXP Employee
NXP Employee

First, please try to test memory.

"i.MX6 DDR Stress Test Tool V1.0.2"

https://community.freescale.com/docs/DOC-96412

Have a great day,
Yuri

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kevin_chaves
Contributor III

I'm having a hard time getting this to work. I'm going to go verify the settings i'm using with my electrical team.

C:\Users\User\Desktop\DDR_Stress_Tester_V1.0.2\Binary>DDR_Stress_Tester.exe -t mx6x -df imx6.inc -usb

MX6DQ opened.

dcd address 0x020bc000 out of valid range.

the addr out of valid range.

I don't think the part number changes anything. The 40 ohm resistors in blue, are those internal resistors to the imx6.

    

Device Information
Manufacturer:Micron
Memory part number:MT42L256M32D2LG-18
Memory type:LPDDR2-1066
DRAM single die density (Gb)1
DRAM density per Channel (Gb)1
DRAM Bus Width32
Number of Chip Selects used per Channel1
DRAM density per CS (Gb)1
DRAM Bus Width Per Channel32
Number of Banks8
Number of ROW Addresses14
Number of COLUMN Addresses10
System Information
i.Mx Parti.Mx6Q
MMDC channels: MMDC0
Bus Width32
DRAM Clock Freq (MHz)528
DRAM Clock Cycle Time (ns)1.894
4KB Interleaving ModeNon-Interleave
SI Configuration
DRAM DSE Setting - DQ/DQM (ohm)40
DRAM DSE Setting - ADDR/CMD/CTL (ohm)40
DRAM DSE Setting - CK (ohm)40
DRAM DSE Setting - DQS (ohm)40
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sivaalagarsamy
Contributor II

I noticed in the excel configuration, you have 8Gb as the single die density. Since the memory you are using has 2 die and the total density is 8Gb, the single die density should be 4Gb.

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kevin_chaves
Contributor III

With more support we fixed the selections, but when running the stress test just stops and never finishes without any output.

//=============================================================================
// DDR Controller Registers
//=============================================================================
// Manufacturer:Micron
// Device Part Number:MT42L256M32D2LG-18 WT:A
// Clock Freq.:533MHz
// Density per CS in Gb:4
// Chip Selects used:2
// Number of channels1
// Density per channel (Gb)8
// Total DRAM density (Gb)8
// Number of Banks:8
// Row address:14
// Column address:10
// Data bus width32
//=============================================================================
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