Re: [PATCH v5 00/14] Armada 370/XP NAND support

[Ezequiel Garcia <ezequiel.garcia@free-electrons.com>]

Arnaud,

On Tue, Nov 26, 2013 at 12:04:52AM +0100, Arnaud Ebalard wrote:
> 
> And \o/ i.e. here is what I get:
> 
> root@mood:~# dmesg
> ...
> pxa3xx-nand d00d0000.nand: This platform can't do DMA on this device
> NAND device: Manufacturer ID: 0xad, Chip ID: 0xf1 (Hynix H27U1G8F2BTR-BC)
> NAND device: 128MiB, SLC, page size: 2048, OOB size: 64
> Bad block table found at page 65472, version 0x01
> Bad block table found at page 65408, version 0x01
> 5 ofpart partitions found on MTD device pxa3xx_nand-0
> Creating 5 MTD partitions on "pxa3xx_nand-0":
> 0x000000000000-0x000000180000 : "u-boot"
> 0x000000180000-0x0000001a0000 : "u-boot-env"
> 0x000000200000-0x000000800000 : "uImage"
> 0x000000800000-0x000001800000 : "minirootfs"
> 0x000001800000-0x000008000000 : "jffs2"
> ...
> 
> root@mood:~# ls /dev/mtd
> mtd0       mtd1ro     mtd3       mtd4ro     mtdblock2  
> mtd0ro     mtd2       mtd3ro     mtdblock0  mtdblock3  
> mtd1       mtd2ro     mtd4       mtdblock1  mtdblock4  
> 
> root@mood:~# dd if=/dev/mtd2ro of=/tmp/foo
> 12288+0 records in
> 12288+0 records out
> 6291456 bytes (6.3 MB) copied, 1.98731 s, 3.2 MB/s
> 
> root@mood:~# file /tmp/foo 
> /tmp/foo: u-boot legacy uImage, Linux-3.12.0.rn102-00048-gbe408c, Linux/ARM, OS Kernel Image (Not compressed), 3740317 bytes, Tue Nov  5 22:24:01 2013, Load Address: 0x00008000, Entry Point: 0x00008000, Header CRC: 0xD84586E1, Data CRC: 0xC4357CED

Good!

> 
> But then /o\ i.e. write does not seem to work out of the box ;-)
> 
> root@mood:~# flash_erase /dev/mtd2 0 0 
> Erasing 128 Kibyte @ 5e0000 -- 100 % complete 
> root@mood:~# nand
> nanddump   nandtest   nandwrite  
> root@mood:~# nandwrite -p /dev/mtd2 /tmp/uImage
> Writing data to block 0 at offset 0x0
> [ 1456.154142] pxa3xx-nand d00d0000.nand: Wait time out!!!
> [ 1456.354143] pxa3xx-nand d00d0000.nand: Wait time out!!!
> [ 1456.554144] pxa3xx-nand d00d0000.nand: Wait time out!!!
> [ 1456.754141] pxa3xx-nand d00d0000.nand: Wait time out!!!
> [ 1456.954140] pxa3xx-nand d00d0000.nand: Wait time out!!!
> [ 1457.154140] pxa3xx-nand d00d0000.nand: Wait time out!!!
> [ 1457.354140] pxa3xx-nand d00d0000.nand: Wait time out!!!
> [ 1457.554140] pxa3xx-nand d00d0000.nand: Wait time out!!!
> [ 1457.754140] pxa3xx-nand d00d0000.nand: Wait time out!!!
> [ 1457.954197] pxa3xx-nand d00d0000.nand: Wait time out!!!
> [ 1458.154140] pxa3xx-nand d00d0000.nand: Wait time out!!!
> 

Yes, this behavior was expected, and it is the reason I wanted to try with
the 'pxa3xx' compatible.

> But I guess this gives you some hints on possible directions.
> 

Indeed! Thanks a lot for such detailed testings. Can you test this
branch instead (you will have to add the DTS for your board)?

  https://github.com/MISL-EBU-System-SW/mainline-public/tree/pxa3xx-armada-nand-new-ecc

It's basically v3.13-rc1, plus latest NAND patches (cherry-picked
from l2-mtd.git), plus a couple more patches to support 2048 pages.

Using this branch you should be able to have detect the device
and test read/write without any issues. You previous DT node should work:

nand@d0000 {
	status = "okay";
	num-cs = <1>;
	marvell,nand-keep-config;
	marvell,nand-enable-arbiter;
	nand-on-flash-bbt;
};


Thanks a lot!
-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com