+++ Luke Kenneth Casson Leighton [2013-05-10 08:59 +0100]: > On Fri, May 10, 2013 at 5:26 AM, Paul Wise <[email protected]> wrote: > > On Fri, May 10, 2013 at 4:29 AM, Jean-Marc wrote: > > > >> I used ext4 to create the NAND FS. > > > > Are you sure about that? I didn't think block-device based filesystems > > could be used on MTD/NAND devices? > > paul: the nand driver from allwinner is a bit odd, it's non-standard > i.e. does not conform to the de-facto standards laid down by the linux > kernel. it's making life a leetle awkward for people who really > really want direct NAND access, but hey.
The low-level NAND driver is presenting a block device rather than an MTD device? Doesn't that mean it's got a built-in FTL of some sort? Does the SOC actually have a fancy nand controller built-in so you don't get direct NAND page access? (I've not looked at the chip specs). <fx: has a google> hmm, seems it does have a fancy controller: http://lists.phcomp.co.uk/pipermail/arm-netbook/2012-September/005740.html http://rhombus-tech.net/allwinner_a10/A10_register_guide/A10_NAND/ But we think that raw page access is probably also available, but no-one's telling how it's done? Is that likely to get fixed at some point? Wookey -- Principal hats: Linaro, Emdebian, Wookware, Balloonboard, ARM http://wookware.org/ -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
