Hi Jean, Patrick, Rudolf
I still have NOT solved the problem that 792 driver for linux-2.6 can NOT work
On Ali M1563 chipset(ABit SU-2S motherboard). Do you have any other suggestion
on it? I want to solve this problem very much, and need your help.
I checked our 792 Windows driver, find that there are several functions used
to get SMBus base address:
GetSMBusBaseAddr()
GetSMBusBaseAddrAli()
GetSMBusBaseAddrALiM1563()
GetSMBusBaseAddrNew()
It seems that the function GetSMBusBaseAddrALiM1563() is for ALi M1563 only,
The only difference between GetSMBusBaseAddrALiM1563() and
GetSMBusBaseAddrAli() is that: the first one need "bit &" a mask "0xfffc",
while the latter need NOT.
Does it have something to do with our problem?
Since I can not contact the person who wrote the Windows driver now, I paste
three functions in this mail, would you like check it for me?
If I want to try to add a mask "0xfffc" in Linux driver too, how should I
modify the codes?
****************** for your reference ************************
ULONG GetSMBusBaseAddrALiM1563(
OUT ULONG *Address,
IN ULONG VendorID,
IN ULONG DeviceID,
IN ULONG RegNo)
{
//ULONG Address;
ULONG Portin = 0xcfc; //config data reg
ULONG Portout = 0xcf8; // config address reg
ULONG Portdata ;
ULONG DeviceVendor;
BOOLEAN Found = FALSE;
ULONG RegIndex;
ULONG FunNo;
ULONG DevNo;
ULONG BusNo;
ULONG ConfigAddr;
ULONG ConfigData;
DeviceVendor = (DeviceID << 16) | VendorID ;
KdPrint( ("DeviceVendor=%8x \n",DeviceVendor));
///////////////////////auto detect vendor id and device id////
RegIndex = 0; // vendor and device id
for (BusNo =0 ; BusNo < 256; BusNo ++)
{
for (FunNo =0 ; FunNo < 8; FunNo ++)
{
for (DevNo =0 ; DevNo < 32; DevNo ++)
{
ConfigAddr = 0x80000000 | RegIndex | (FunNo << 8) | (DevNo << 11) | (BusNo << 16);
WRITE_PORT_ULONG( (PULONG)(Portout) , ConfigAddr );
ConfigData = READ_PORT_ULONG( (PULONG)(Portin) );
if ( ConfigData == DeviceVendor )
{
Found = TRUE;
break;
}
}
if ( Found )
break;
}
if ( Found )
break;
}
if ( Found )
{
KdPrint( ("FunNo=%4x ,DevNo=%4x, BusNo=%4x \n",FunNo,DevNo,BusNo));
RegIndex = RegNo;
ConfigAddr = 0x80000000 | RegIndex | (FunNo << 8) | (DevNo << 11) | (BusNo << 16);
WRITE_PORT_ULONG( (PULONG)(Portout) , ConfigAddr );
ConfigData = READ_PORT_ULONG( (PULONG)(Portin) );
*Address = ConfigData & 0xfffc ; /* here !!! */
KdPrint( ("get smbus address Address =%8x \n",*Address));
return 0;
}
else
return -1;
}
While in GetSMBusBaseAddr() and GetSMBusBaseAddrAli() the mask is:
*Address = ConfigData & 0xfffe ;
*Address = ConfigData & 0xffff ;
Thanks
Best Regards
Chunhao
> -----Original Message-----
> From: Jean Delvare [mailto:khali at linux-fr.org]
> Sent: 2005??3??11?? 03:41
> To: Patrick Mochel
> Cc: PI14 HUANG0; PI10 LHHsu; PI14 DZSHEN; sensors at Stimpy.netroedge.com; PI13
> CFLi
> Subject: Re: We will port w83792d.c to linux-2.6
>
> Hi Patrick,
>
> > Note that while not *identical*, the controller shares a lot of
> > similarities with the i810 driver.
>
> I assume i801.
>
> > In SMB_HST_STS (offset 0), bit 6 is "ISUSE_STS", which reads a 0 the
> > first time after the device is reset, then a 1 after that. Seems like
> > it can be used to check if the deivce is ready to be used after a
> > reset..
>
> Thanks for the info. Incidentally it might help me with a problem I have
> with the i2c-viapro driver. You would be surprised how many common
> points there are between the various SMBus masters found on x86
> motherboards.
>
> I guess that this bit is read-only?
>
> According to the source, bit 7 is "DONE". I guess it is read-only as
> well, and set after a successful transaction?
>
> If bit 5 used for anything?
>
> > It says that it only happens at address 0x58. Is there a device there?
> > If there is, perhaps you could try increasing the timeout?
>
> I would guess that 0x58 is the value of the register, which is 7 bits of
> address and 1 bit of R/W. So the device address would rather be 0x44
> (0x58 >> 1). It happens that 0x44 is a special address for SMBus 2.0, if
> I am not mistaken.
>
> I don't know much more, unfortunately.
>
> Anyway thanks Patrick for the info.
>
> --
> Jean Delvare
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