[U-Boot] Micrel Controller KSZ8841-16MBL

[Douglas Lopes Pereira]

Hi Ben,

I was able to integrate your driver to u-boot and load it on my PowerPC
board.
Since the device was not recognized, I started debugging it and found some
hardware issues.

For some reason we are not able to change the bank registers by writing the
bank number into 30e address. Ps. I'm writing directly to the memory, so it
not driver related.

Hardware team is still working on that and once it is fixed, we will be able
to test your driver.

Steve, if you have any success on using Ben's driver or if I can be of any
help, please let me know.

Regards,
Douglas

On Tue, Jun 22, 2010 at 9:26 PM, Ben Warren <biggerbadderben at gmail.com>wrote:

> Hi Steve,
>
>
> On 6/22/2010 4:44 PM, Steve Sakoman wrote:
>
>> On Tue, Jun 15, 2010 at 9:14 AM, Ben Warren<biggerbadderben at gmail.com>
>>  wrote:
>>
>>
>>> Hi Douglas,
>>>
>>> On Tue, Jun 15, 2010 at 7:24 AM, Douglas Lopes Pereira<
>>> douglaslopespereira at gmail.com>  wrote:
>>>
>>>
>>>
>>>> Hi all,
>>>>
>>>> I managed to get KS8841 driver recognized by u-boot. But I'm certain
>>>> that
>>>> it was not in the correct way.
>>>>
>>>> The driver I've found on BlackFin forum was written for a 2008 u-boot
>>>> version and we are working on a 1.3.1 (very old) version. So I just
>>>> modify
>>>> some function calls.
>>>>
>>>> The problem is that the KS8841 driver does not have a ks884x_initialize
>>>> function. So we created it. All it does is create and fill an eth_device
>>>> structure. Register it using eth_register function and them it should
>>>> initialize the PHY (that is what I suppose it should do).
>>>>
>>>> Since I am not sure on how to do that, I just called the ks884x_init
>>>> function.
>>>>
>>>> It ends in a TRAP message just after the Micrel device being printed at
>>>> the
>>>> console.
>>>>
>>>> Could anyone point me out some directions to get my driver correctly
>>>> initialized?
>>>>
>>>> Looks like that driver's using the old API.  I have my new one almost
>>>>
>>>>
>>> finished and will send it to you today.  Hopefully debugging it will be
>>> trivial.
>>>
>>>
>> I've just started looking at doing a KS8851 driver (on SPI) for one of
>> the OMAP4 boards.
>>
>> Did you start from scratch with the KS8841 driver or did you begin
>> with Micrel sample code?
>>
>> The Micrel sample u-boot driver clearly can't be used as is since it
>> doesn't even come close to following the coding style guidelines
>> (CamelCase, etc) and is for an older u-boot revision.
>>
>> I'm debating whether it makes more sense to correct the coding style
>> on the vendor code, or just start from scratch.  Any advice based on
>> your experience?
>>
>>
>>
> A few years ago I wrote a driver for KS8841 and got it working (16-bit
> memory-mapped on PowerPC).  I started with the Micrel driver, but as you
> know it's pretty ugly.  Last week I dusted off that old driver and got it to
> compile with the latest U-boot, but wasn't able to test it because the
> company that I worked for is long gone.  It's hopefully close to functional,
> but still has too many style issues to post publicly.  I sent the driver to
> Douglas off-line, and am awaiting feedback.  If you'd like, I can send it to
> you too.  It'd be nice to have a single driver that handles different chips,
> but with configurable accessors.
>
>> Steve
>>
>>
> regards,
> Ben
>