[Arm-netbook] Fwd: Exynos4412 Quad Core Board

[Dr. David Alan Gilbert]

* lkcl luke (luke.leighton at gmail.com) wrote:
> On Sat, Jul 14, 2012 at 11:47 PM, lkcl luke <luke.leighton at gmail.com> wrote:
> 
> >> Still, it would be great to find prices on the module and details
> >> of the EBI.
> >
> >  does anyone know where the exynos 44xx datasheet can be obtained from?
> 
>  http://en.wikipedia.org/wiki/External_Bus_Interface
> 
>  ok, well apparently it's a standard, typically used to access NAND or
> SDRAM, but happily general-purpose enough to access any
> memory-addressable device (DM9000)
> 
>  right.  also, amazingly, there does actually exist an SATA-I PHY IC
> from ATMEL: Atmel:AT78c5091 - datasheet's here:
> http://www.dzjsw.com/jcdl/a/AT78C5091.pdf
> 
>  the main job is done: conversion to/from 8-bit parallel is handled.
> it looks like quite a lot of discrete components would be needed in
> order to give it an actual memory address, which could then be
> read/written using DMA from the EBI bus, but that's not too hard.

Going through 8-bit parallel is hardlyworth the bother; you may as well
bridge off USB.

Hmm - what chip uses this then:

http://git.kernel.org/?p=linux/kernel/git/kgene/linux-samsung.git;a=blob_plain;f=arch/arm/mach-exynos/dev-ahci.c;hb=HEAD


Dave
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