Re: [ECOS] Ethernet on top of SPI

[Mandeep Sandhu <mandeepsandhu dot chd at gmail dot com>]

On Wed, Oct 14, 2009 at 12:27 PM, Ilija Stanislevik <ilijas@siva.com.mk> wrote:
> Hi,
>
> We are developing hardware based on STM32. For Ethernet we use
> Microchip's ENC424J600, connected on one of the STM32's SPI buses.
>
> Our intention is to develop an Ethernet driver for ENC424J600 on top of
> the SPI driver. We also intend to make this Ethernet-over-SPI general
> regarding SPI hardware, but it seems that there are some obstacles there.

We have a similar requirement, where we are going to connect a
wireless ethernet controller, over SPI,  to the AT91SAM7X SoC.

Do you have plans to conribute back your ethernet-over-SPI driver?

Regards,
-mandeep

>
> The polarity and phase of STM32's SPI should be adjusted to the
> requirements of ENC424J600. In the SPI's API there is no get/set-config
> support for this. The configtool has no provision to set this either.
> The only way to adjust this is to poke the driver's private data
> structure. This means that our Ethernet driver must be written
> specifically for STM32's SPI.
>
> Also, I have found no provision to refer SPI driver by device name,
> another reason to stick the Ethernet driver to specific SPI hardware.
>
> Am I right with above conclusions? Of course, if there is no other
> solution, we will live with an Ethernet driver married to our SPI hardware.
>
> Anyway, are there any rules/directions on SPI's API regarding hardware
> independence?
>
> Thank you,
>
> Ilija Stanislevik
>
> SIvA doo
> ul. Zejnel Ajdini 5
> MK-1060 Skopje
> Macedonia
>
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>
>

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