[U-Boot-Users] Blank console with IXDP425 in U-boot-1.1.6

Thu Jun 21 11:43:10 CEST 2007

Hello,

Thanx alot for all your valuable inputs. Finally got the console working for
my customised IXP422 based target board. 
This maybe useful for someone else trying...

Bootloader: U-boot 1.1.6 with npe microcode 2.4
(IPL_ixp400NpeLibrary-2_4)from Intel 
Toolchain : arm-linux-tools-20061213.tar.gz 
Settings used r below:
/*
 * Expansion bus settings
 */
#define CFG_EXP_CS0				0xbFFF3c42

/*
 * SDRAM settings
 */
#define CFG_SDR_CONFIG		0x18
#define CFG_SDR_MODE_CONFIG	0x1
#define CFG_SDRAM_REFRESH_CNT 	0x81a

/*
 * select serial console configuration
 */
#define CFG_IXP425_CONSOLE      IXP425_UART2
One thing which i got confused was that,
the Schematics of IXDP425 (Development board from Intel) mentioned the UARTs
and UART0 and UART1. While the IXP42X datasheet mentions High-speed UART
(C8000000) and Console UART at (C8001000)
and U-boot mentions the UARTs as UART1 and UART2

Hence even though in my customed target board schematics the console is
shown as connecte to UART1, 
in u-boot you have to choose the UART2 option as shown above.

I have got the console up but my ethernet is not yet up. Now my next target
is to get that working. Any tips for me :)

Few questions--
1> Why is the CFG_HZ as 3333333 ? Is this for the Bus for UART? I read its
66MHz
2> What us CONFIG_KGDB_SER_INDEX? Its now set to 2, is it connected to my
serial console port? 
Iam using two SDRAM's 128Mbit each, connected to CS0 having D0-D15 and
D16-D31 datalines respectively. Hence Iam using total size of 32MB SDRAM (2
SDRAM's of 128Mbit --> 8Mx16)
3> What is PHYS_SDRAM_1_SIZE? Will it be the total SDRAM size or size of 1
SDRAM?? I tried iwth both options and didnt see any difference.
Please let me know.

Cheers!

Queenie

Queenie wrote:
> 
> Hi Stefan,
> 
> I checked the SDRAM setting and the SDRAM controller options of IXP425, 
> the SDRAM Iam using is Winbond W981216DH-75, Iam using two such SDRAM's
> connected to CS0 having D0-D15 and D16-D31 datalines respectively. Hence
> Iam using total size of 32MB SDRAM (2 SDRAM's of 128Mbit --> 8Mx16)
> The SDRAM Iam using is have CL3 (CAS latency 3)
> 
> accordingly I have changed by SDRAM Seetings as below
> 
> /*
>  * SDRAM settings
>  */
> #define CFG_SDR_CONFIG		0x8
> #define CFG_SDR_MODE_CONFIG	0x1
> 
> How can i calcualte the CFG_SDRAM_REFRESH_CNT and the CFG_EXP_CS0?
> In U-boot, the values given r as below? 
> #define CFG_SDRAM_REFRESH_CNT 	0x81a
> #define CFG_EXP_CS0		0xbcd23c42
> 
> How can i find it for my target board? 
> 
> I tried with the above setting but i still could not get my console to be
> working :(
> Few questions--
> 1> Why is the CFG_HZ as 3333333 ? Is this for the Bus for UART? I read its
> 66MHz
> 2> What us CONFIG_KGDB_SER_INDEX? Its now set to 2, is it connected to my
> serial console port? 
> 
> --
> Queenie
> 
> 
> Stefan Roese wrote:
>> 
>> On Tuesday 12 June 2007, Queenie wrote:
>>> Is there any way I can find out the difference between the IXDP425 
>>> board
>>> (development platform) and my customised board? I have the schematics
>>> only
>>> of my customised target platform.
>> 
>> You should be able to get the schematics for the Intel eval board from
>> the 
>> Intel. If it's not available on the web-page, then you should contact
>> your 
>> Intel distributor/FAE.
>> 
>>> From the schematics its clear that the IXP425 266MHz network processor
>>> uses
>>> the 33MHz PCI bus. The Expansion bus is connected to the Flash (Boot
>>> ROM). 
>>> the SDRAM used is 4M*16*2. Serial port is connected to UART1 and MII 1
>>> to
>>> the Lan port PHY.
>>> The physical address for Flash is (0x50000000) and SDRAM (0x00000000).
>> 
>> I suspect that you have a problem either with the boot-flash setup or the 
>> SDRAM configuration. Here the setup from the ixdp425.h config file:
>> 
>> /*
>>  * Expansion bus settings
>>  */
>> #define CFG_EXP_CS0				0xbcd23c42
>> 
>> /*
>>  * SDRAM settings
>>  */
>> #define CFG_SDR_CONFIG		0xd
>> #define CFG_SDR_MODE_CONFIG	0x1
>> #define CFG_SDRAM_REFRESH_CNT 	0x81a
>> 
>> Please check if this exactly matches your setup. If not you have to
>> change 
>> these values accordingly.
>> 
>>> Do I have any changes in the /include/configs/ixdp425.h ?
>>> CFG_HZ is 3333333 currently.
>>> What r the files in U-boot i have to concentrate on? And what r the
>>> other
>>> things i have to check for considering Iam a newbie in this field.
>>>
>>> Can it be that I havent used the right cross toolchain to compile? R
>>> there
>>> some options i have to select?
>>> I have used arm-linux-tools-20061213.tar.gz ??
>>>
>>> Can someone please guide me.
>> 
>> I am.
>> 
>> Best regards,
>> Stefan
>> 
>> =====================================================================
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>> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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> 
> 

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