andy at openmoko.com
Mon Apr 28 13:43:08 CEST 2008
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Somebody in the thread at some point said:
| On 28/04/2008, Werner Almesberger <werner at openmoko.org> wrote:
|> > Basically a form of SDIO multiplexing.
|> > Other options would be SPI.
|> We once asked Samuel about SPI, and he said that it would be slower,
|> but still good enough. (In real life, the theoretically possible
|> maximum speed is rarely reached anyway.)
|> Without digging through the Atheros driver, I don't know how much work
|> it would be to put it on SPI. If the abstraction is clean, it could be
|> very simple. If not, a pain.
| You'd need to also adapt the mmc/sd stack in linux/drivers/mmc/ to use
| the SPI mode because it's not supported by linux at the moment. In
| this mode different MMC commands are allowed and the state machine is
| a little different. There may already be patches available somewhere.
I think we propose to just move WLAN interface to native SPI, leave MMC
/ SD using native SDIO interface from S3C2442. So no need for
considering the SPI mode of MMC commands.
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