Re: [PATCH] Add PCI device ID for IT8152 RISC-to-PCI chip

[Raphael Assenat]

Lennart Sorensen wrote:
> On Fri, Feb 09, 2007 at 03:14:05PM -0500, Raphael Assenat wrote:
>
> > This patch adds a PCI device ID (0x8152) for the IT8152F/G
> > Advanced RISC-to-PCI Companion Chip.
> >
> > --
> > Raphael Assenat
> > 8D Technologies Inc.
>
>
> > This patch adds a PCI device ID for the IT8152F/G 
> > Advanced RISC-to-PCI Companion Chip.
> >
> > Signed-off-by: Raphael Assenat <raph@xxxxxx>
> >
> > --- linux-2.6.20/include/linux/pci_ids.h	2007-02-04 13:44:54.000000000 -0500
> > +++ linux-2.6.20-8d/include/linux/pci_ids.h	2007-02-09 15:00:38.000000000 -0500
> > @@ -1626,6 +1626,7 @@
> > #define PCI_VENDOR_ID_ROCKWELL		0x127A
> >
> > #define PCI_VENDOR_ID_ITE		0x1283
> > +#define PCI_DEVICE_ID_ITE_8152		0x8152
> > #define PCI_DEVICE_ID_ITE_8211		0x8211
> > #define PCI_DEVICE_ID_ITE_8212		0x8212
> > #define PCI_DEVICE_ID_ITE_8872		0x8872
>
>
> Oh that one.  Anyone ever have a reliable PCI bus with one of these?
> The one system on a board I have worked with in the past had so many
> problems with the PCI bus that we have to switch to another board
> instead.  Too bad since the ARM cpu was much faster and better and
> handling network traffic (we switched to a Geode SC1200 based board).
>
> At the time my theory was that the cpu would interrupt DMA transfers
> when it wanted access to system memory, which would break the PCI
> transfers.  But that was just my theory.
Really? I have no idea if it's possible to get a reliable PCI bus or
not with this chip. Right now, we only use it for it's built-in OHCI 
USB host controller and UART. You're making me hope I never have to 
use it for interfacing a PCI card!

Best regards,

--
Raphael Assenat
8D Technologies Inc.
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