i.MX287 eMMC boot without NAND flash support

[vitaliyvasiliev]

Hi, I have an i.MX28 custom board that haven't got a NAND Flash.

It's just eMMC (Samsung klm4g1fe3b-b001, 8 bit bus) connected to the SP0 interface.

So, when I've tried to run default EBOOT using sb_loader, I had following output in terminal:

BATT:0.83V

No Battery Mode

5

U

XLDR Start

SDRAM init

SDRAM init done

XLDR done

LLLCBSP Clock Configuration:

    PLL0        =  480000000 Hz

    PLL1        =  480000000 Hz

    PLL2        =          0 Hz

    REF_CPU     =  480000000 Hz

    REF_EMI     =  392727272 Hz

    REF_IO0     =  480000000 Hz

    REF_IO1     =  480000000 Hz

    REF_PIX     =  480000000 Hz

    REF_HSADC   =  480000000 Hz

    REF_GPMI    =  480000000 Hz

    REF_PLL     =  480000000 Hz

    REF_XTAL    =   24000000 Hz

    REF_ENET_PLL=          0 Hz

    P_CLK       =  240000000 Hz

    H_CLK       =  120000000 Hz

    X_CLk       =   24000000 Hz

    ETM         =   24000000 Hz

    EMI         =  196363636 Hz

    SSP0        =   24000000 Hz

    SSP1        =   24000000 Hz

    SSP2        =   24000000 Hz

    SSP3        =   24000000 Hz

    GPMI        =   24000000 Hz

    HSADC       =   26666666 Hz

    LCDIF       =   24000000 Hz

    SPDIF       =  120000000 Hz

    UTMI0       =  480000000 Hz

    UTMI1       =  480000000 Hz

    UART24MHZ   =   24000000 Hz

    PWM24MHZ    =   24000000 Hz

    TIMROT32K   =      32000 Hz

Microsoft Windows CE Bootloader Common Library Version 1.4 Built Oct 17 2014 13:

41:01

Microsoft Windows CE Ethernet Bootloader 1.0 for MX28 (Oct 21 2014 21:54:47)

reset GPMI module

enable bch module

ERROR: F:\WINCE600\PLATFORM\COMMON\SRC\SOC\COMMON_FSL_V2_PDK1_9\NAND\FMDCOMMON\B

IG_SECTOR_INTERLEAVE\.\fmd.cpp line 208: no NAND type matched!

WARNING: OEMPlatformInit: Failed to initialize NAND flash device.

SD/MMC card is not found.

WARNING: OEMPlatformInit: Failed to initialize SDHC device.

WARNING: NAND device doesn't exist - unable to read image.

ERROR: LoadBootCFG: failed to load configuration.

ERROR: flash initialization failed - loading bootloader defaults...

Resetting factory default configuration...

WARNING: NAND device doesn't exist - unable to store image.

ERROR: ResetDefaultBootCFG: failed to store configuration to flash.

System ready!

Preparing for download...

INFO:  Initial Eboot Screen Display...

EBOOT: DisplayInit++

Press [ENTER] to launch image stored in NAND flash or [SPACE] to cancel.

Initiating image launch in 3 seconds.

-----------------------------------------------------------------------------

Freescale iMX SOC Menu Item

-----------------------------------------------------------------------------

[0] IP Address : 192.168.111.10

[1] Set IP Mask : 255.255.255.0

[2] Boot Delay : 3

[3] DHCP : Enabled

[4] Reset to Factory Default Configuration

[5] Select Boot Device : NK from NAND

[6] Set MAC Address : 0-2-B3-92-A8-C4

[7] Format OS NAND Region

[8] Format All NAND Regions

[9] Bootloader Shell

[I] KITL Work Mode : Interrupt

[K] KITL Enable Mode : Disable

[P] KITL Passive Mode : Disable

[S] Save Settings

[D] Download Image Now

[L] Launch Existing Flash Resident Image Now

[E] Select Ether Device : ENET

[M] MMC and SD Utilities

[F] NAND Low Level Format

[U] Set UUID : 0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0

Could you please help me and tell what do I change in BSP to make it work? 

[igorpadykov]

Hi Vitaliy

from log I would not say that it is not working,

you can rebuild BSP using attached document, check

sect.3.2 "BSP Environment Variables".

Best regards

igor

[vitaliyvasiliev]

There are a three sets of variables:

1. BSP_NOXXX: what i'm looking for is BSP_NONAND_FMD, but it's just exclude NAND_FMD driver from platform.reg, so it doesn't resolve EBOOT nand initialization error:

ERROR: F:\WINCE600\PLATFORM\COMMON\SRC\SOC\COMMON_FSL_V2_PDK1_9\NAND\FMDCOMMON\BIG_SECTOR_INTERLEAVE\.\fmd.cpp line 208: no NAND type matched!

WARNING: OEMPlatformInit: Failed to initialize NAND flash device.

2. BSP_XXX: it refers to "i.MX28 EVK Windows Embedded CE 6.0 Reference Manual" that contains section that might helped me called "Boot from SD/MMC summary", but there was only cfimager description and nothing about disabling "nand check". Also, there are variables to configure the many of drivers (Audio, blacklight, etc...).

3. IMG_XXX: Only one variable IMGSDMMC and it seems useless in my case.

I looked at source code of bootloader (i.MX28-EVK-PDK1_9\SRC\BOOTLOADER\COMMON\main.c), and this error produced by function FMD_Init(), just as an error

"SD/MMC card is not found.

WARNING: OEMPlatformInit: Failed to initialize SDHC device."

produced by calling the SDMMC_Init() function.

And this file doesn't contain macro conditions about excluding functional, thus it's not so easy as I had hoped.

It seems there must be a lot of changes...

[igorpadykov]

Hi Vitaliy

you can try to experiment with various options

and check what will suit.

Best regards

igor