Re: SiS 5513 ATA133 support patch for 2.4.19-rc3-ac3

[Daniela Engert]

On Mon, 29 Jul 2002 10:56:26 +0200, Lionel Bouton wrote:

>On lun, jui 29, 2002 at 09:11:34 +0200, Daniela Engert wrote:
>> On Mon, 29 Jul 2002 01:37:54 +0200, Lionel Bouton wrote:
>> 
>> 
>> Lionel,
>> 
>> as you already figured out, looking at the northbridge IDs is simply
>> not sufficient to find out which capabilities and register layout the
>> IDE controller in the southbridge (no matter if integrated or external)
>> has.
>> 
>> Some comments:
>> 
>> 1) the 745 has an integrated southbridge and an ATA/100 capable IDE
>> controller
>> 
>
>I believed so too, but Lei-Chun patch changed it to ATA133.
>Lei-Chun, could you tell us what we can expect from 745 chips ?

I have a user report indicating that:

PCI BIOS V2.10 detected, 2 PCI buses present.
Found embedded SiS 5513 on 0/2/5
00:  39 10 13 55  07 00 00 00  D0 80 01 01  00 80 80 00  
10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  
20:  01 40 00 00  00 00 00 00  00 00 00 00  19 10 41 0A  
30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  
40:  31 81 31 82  31 00 31 00  08 01 E6 33  00 02 00 02  
50:  01 00 01 06  00 00 00 00  00 00 00 00  00 00 00 00  
BusMaster Registers:
00:  08 00 60 00  58 28 F6 00  00 00 04 00  FC 5F 00 00  

VendorID 1039, DeviceID 5513, Subsystem VendorID 1019, DeviceID 0A41
IOBase      4000h (Len 10h)

Host bridge (1039/0745 rev 01) on 0/0/0
South bridge (1039/0008 rev 00) on 0/2/0

The primary master is a UDMA 5 disk, and primary slave a UDMA 4 one.

>> 2) the 646 (and most likely the 645 and others as well) may be paired
>> with a 961 (ATA/100) or 961B (ATA133) MutIOL southbridge with different
>> register programming values.
>> 
>> Thus simply ripping out some northbridge IDs wouldn't prevent
>> corruption problems.
>> 
>
>I don't see why (unless you refer to the 962/963 problem I did mention).
>If we remove the IDs, the chips will be detected as SiS5513 (ATA_16). If
>I'm correct, in this mode (only allowing PIO modes and SW/MW DMA modes)
>all chips are OK.
>I didn't dig in all specs to check each config register change, but all I
>saw was OK and I *never* received any data corruption report for a chip that
>was configured as original SiS5513 (though I have many reports of bad
>performance due to PIO modes being used in such cases).

Ok, I think you are right, disabling UDMA mode should be a safe bet.

Ciao,
  Dani

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Daniela Engert, systems engineer at MEDAV GmbH
Gräfenberger Str. 34, 91080 Uttenreuth, Germany
Phone ++49-9131-583-348, Fax ++49-9131-583-11