Re: [coreboot] Via EPIA-N(L) C3/CN400 Support - Help Wanted

[Harrison, Jon (SELEX GALILEO, UK)]

Hi Bari,

Thanks for the offer of help. Although the CN400 is EOL'd it's in the
Luke and I've got 20 odd -NL boards I'd like to do something with. I'd
appreciate any pointers to you could give on any mandatory sequence
required for the SDRAM Init.

I'm now fairly sure the build and link is OK, but I'm not so convinced
that I've got the early SDRAM Init correct, seems to be a bit
intermittent whether the verification works or not.

I've based what I've got on the epia-m/VT8623 northbridge code as it
seems more like the CN400 than the CN700 does.

I can PM you my raminit.c code if you're willing to help.

Otherwise I have a few questions:
1/ Is there an equivalent of the CKE control sequence is for the CN400. 
2/ Is it necessary to toggle the DQS DLL adjust (d0f3 0x6B) after each
setting of the DQS output delay parameter.
3/ Is there a specific host address required to issue SDRAM commands
4/ should the DIMM control (d0f3 0x48) be setup before or after the
timing setup (any delays required).

Thanks,
Jon

lspci for the -NL board below::

00:00.0 Host bridge [0600]: VIA Technologies, Inc. CN400/PM880 Host
Bridge [1106:0259]
00: 06 11 59 02 06 00 30 22 00 00 00 06 00 08 80 00
10: 08 00 00 e8 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 06 11 07 aa
30: 00 00 00 00 80 00 00 00 00 00 00 00 00 00 00 00

00:00.1 Host bridge [0600]: VIA Technologies, Inc. CN400/PM880 Host
Bridge [1106:1259]
00: 06 11 59 12 06 00 00 02 00 00 00 06 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00:00.2 Host bridge [0600]: VIA Technologies, Inc. CN400/PM880 Host
Bridge [1106:2259]
00: 06 11 59 22 06 00 00 02 00 00 00 06 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00:00.3 Host bridge [0600]: VIA Technologies, Inc. CN400/PM880 Host
Bridge [1106:3259]
00: 06 11 59 32 06 00 00 02 00 00 00 06 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00:00.4 Host bridge [0600]: VIA Technologies, Inc. CN400/PM880 Host
Bridge [1106:4259]
00: 06 11 59 42 06 00 00 02 00 00 00 06 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00:00.7 Host bridge [0600]: VIA Technologies, Inc. CN400/PM880 Host
Bridge [1106:7259]
00: 06 11 59 72 06 00 00 02 00 00 00 06 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 a0 00 00 00 00 00 00 00 00 00 00 00

00:01.0 PCI bridge [0604]: VIA Technologies, Inc. VT8237 PCI Bridge
[1106:b198]
00: 06 11 98 b1 07 01 30 02 00 00 04 06 00 00 01 00
10: 00 00 00 00 00 00 00 00 00 01 01 00 f0 00 20 e2
20: 00 f4 f0 f5 00 f0 f0 f3 00 00 00 00 00 00 00 00
30: 00 00 00 00 70 00 00 00 00 00 00 00 00 00 0e 00

00:0f.0 IDE interface [0101]: VIA Technologies, Inc. VIA VT6420 SATA
RAID Controller [1106:3149] (rev 80)
00: 06 11 49 31 07 00 90 02 80 8f 01 01 00 20 80 00
10: 01 b0 00 00 01 b4 00 00 01 b8 00 00 01 bc 00 00
20: 01 c0 00 00 01 c4 00 00 00 00 00 00 06 11 07 aa
30: 00 00 00 00 c0 00 00 00 00 00 00 00 0b 02 00 00

00:0f.1 IDE interface [0101]: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE [1106:0571] (rev
06)
00: 06 11 71 05 07 00 90 02 06 8a 01 01 00 20 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 01 c8 00 00 00 00 00 00 00 00 00 00 06 11 07 aa
30: 00 00 00 00 c0 00 00 00 00 00 00 00 ff 01 00 00

00:10.0 USB Controller [0c03]: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller [1106:3038] (rev 81)
00: 06 11 38 30 07 00 10 02 81 00 03 0c 08 20 80 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 01 cc 00 00 00 00 00 00 00 00 00 00 06 11 07 aa
30: 00 00 00 00 80 00 00 00 00 00 00 00 0a 01 00 00

00:10.1 USB Controller [0c03]: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller [1106:3038] (rev 81)
00: 06 11 38 30 07 00 10 02 81 00 03 0c 08 20 80 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 01 d0 00 00 00 00 00 00 00 00 00 00 06 11 07 aa
30: 00 00 00 00 80 00 00 00 00 00 00 00 0a 01 00 00

00:10.2 USB Controller [0c03]: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller [1106:3038] (rev 81)
00: 06 11 38 30 07 00 10 02 81 00 03 0c 08 20 80 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 01 d4 00 00 00 00 00 00 00 00 00 00 06 11 07 aa
30: 00 00 00 00 80 00 00 00 00 00 00 00 0b 02 00 00

00:10.3 USB Controller [0c03]: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller [1106:3038] (rev 81)
00: 06 11 38 30 07 00 10 02 81 00 03 0c 08 20 80 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 01 d8 00 00 00 00 00 00 00 00 00 00 06 11 07 aa
30: 00 00 00 00 80 00 00 00 00 00 00 00 0b 02 00 00

00:10.4 USB Controller [0c03]: VIA Technologies, Inc. USB 2.0
[1106:3104] (rev 86)
00: 06 11 04 31 17 00 10 02 86 20 03 0c 08 20 80 00
10: 00 00 00 f6 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 06 11 04 31
30: 00 00 00 00 80 00 00 00 00 00 00 00 0c 03 00 00

00:11.0 ISA bridge [0601]: VIA Technologies, Inc. VT8237 ISA bridge
[KT600/K8T800/K8T890 South] [1106:3227]
00: 06 11 27 32 87 00 10 02 00 00 01 06 00 00 80 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 06 11 07 aa
30: 00 00 00 00 c0 00 00 00 00 00 00 00 00 00 00 00

00:11.5 Multimedia audio controller [0401]: VIA Technologies, Inc.
VT8233/A/8235/8237 AC97 Audio Controller [1106:3059] (rev 60)
00: 06 11 59 30 01 00 10 02 60 00 01 04 00 00 00 00
10: 01 dc 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 06 11 07 aa
30: 00 00 00 00 c0 00 00 00 00 00 00 00 0c 03 00 00

00:12.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6102
[Rhine-II] [1106:3065] (rev 78)
00: 06 11 65 30 07 00 10 02 78 00 00 02 08 20 00 00
10: 01 e0 00 00 00 10 00 f6 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 06 11 02 01
30: 00 00 00 00 40 00 00 00 00 00 00 00 0a 01 03 08

01:00.0 VGA compatible controller [0300]: VIA Technologies, Inc. S3
Unichrome Pro VGA Adapter [1106:3118] (rev 02)
00: 06 11 18 31 07 00 30 02 02 00 00 03 00 20 00 00
10: 08 00 00 f0 00 00 00 f4 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 06 11 18 31
30: 00 00 00 00 60 00 00 00 00 00 00 00 0a 01 02 00

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

Message: 6
Date: Mon, 08 Jun 2009 18:11:31 -0500
From: bari 
To: Jon Harrison 
Cc: [e-mail]
Subject: Re: [coreboot] Via EPIA-N(L) C3/CN400 Support - Help Wanted
Message-ID: 
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Jon Harrison wrote:
> Hi Guys,
>
> I'm currently working on porting coreboot to the Via EPIA-N(L) i.e. 
> C3/CN400/VT8237R/Winbond SuperIO.

I have a few SP13000's sitting in storage and all the docs but no time. 
The cn400 is EOLed by VIA.

I may be of some help if you post an LSPCI and I may be able to answer a

few questions. The C3 and vt8327r is already supported.

-Bari

SELEX Sensors and Airborne Systems Limited
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 3EL
A company registered in England & Wales.  Company no. 02426132
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