Messages in this thread | | | Date | Thu, 15 Dec 2005 17:01:30 +0100 | From | Pierre Ossman <> | Subject | Re: [patch 0/5] Add MMC password protection (lock/unlock) support |
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Russell King wrote: > Reading through the specs I have here, block sizes seem to be all over > the place. The MMC card specs seem to imply that any block size can > be set, from 0 bytes to 2^32-1 bytes. > > The PXA MMC interface specification allows the block size to be anything > from 1 to 1023 bytes, excluding CRC. It is unclear whether a value of 0 > means 1024. > > The MMCI specification allows the block size to be specified as a power > of two, from 1 to 2048 bytes, excluding CRC. > > Pierre - can you comment on wbsd's capabilities please? > >
wbsd can do 1 to 4087 (it wants CRC bytes in the size so it goes to 4095 including those). Which means I probably set incorrect sg limits... I guess I should fix that.
sdhci, which I'm currently developing, can do up to 0x7FFF. The register is 16-bits, but the upper bit never sticks so I assume it cannot be used.
Rgds Pierre - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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