Jffs2Mount Issue.

[Murali Sampath]

HI 

I am using the Uboot and Kernel is 2.4.27 and also I have AMD29LV640 flash device. I get the jffs2_scan_erase_block errors.
I am stuck not able to get JFFS2 to work right. Any suggestions will  be
greatly appreciated. I have no problem in using NFS. 
Thanks

Following is the part of trace.

Murali




************************************************************************
*
Trace on my board looks like the following.

PPP generic driver version 2.4.2
PPP Deflate Compression module registered
PowerPC/UBoot 8xx/8xxx flash device: 0x800000 bytes at 0xff800000 (16
bits wide)
PowerPC/Uboot 8xx/8xxx boards: Found 1 x16 devices at 0x0 in 16-bit mode
 Amd/Fujitsu Extended Query Table at 0x0040
PowerPC/Uboot 8xx/8xxx boards: CFI does not contain boot bank location.
Assuming top.
number of CFI chips: 1

cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.


Creating 4 MTD partitions on "PowerPC/Uboot 8xx/8xxx boards":
0x00000000-0x00040000 : "UbootConfig"
mtd: Giving out device 0 to UbootConfig
0x00040000-0x00700000 : "JFFS2"
mtd: Giving out device 1 to JFFS2
0x00700000-0x00780000 : "U-Boot"
mtd: Giving out device 2 to U-Boot
0x00780000-0x00800000 : "Linux"
mtd: Giving out device 3 to Linux

******
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00030000:
0x0808 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00030004:
0x0808 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00030008:
0x6666 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0003000c:
0x6666 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00030010:
0x0606 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00030014:
0x0606 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00030018:
0x4646 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0003001c:
0x4646 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00030100:
0x3aa0 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00030104:
0x6000
*******

-----Original Message-----
From: linux-mtd-bounces at lists.infradead.org
[mailto:linux-mtd-bounces at lists.infradead.org]On Behalf Of Burch, John
T.
Sent: Wednesday, May 04, 2005 6:36 PM
To: linux-mtd at lists.infradead.org
Subject: MTD do_write_oneword(): software timeout



I'm using kernel 2.6.8 and am having problems with jffs2/mtd.
Frequently, though I'm not sure why, file writes fail as
shown in the debug output below (CONFIG_MTD_DEBUG_VERBOSE=3).
The failure appears to be as a result of do_write_oneword().
The error sometimes occurs with timeouts; other times it
does not.  Another curiousity is that the failures appear
to occur when a do_write_oneword() occurs at an
address that was just written (indicated below with '**').
Is this normal jffs2 behaviour, since it seems that the
first write is always with data=0x785e?

All works well with previous code running kernel 2.4.17, so
I know it's not a problem with the flash itself.  I have seen
some discussion of the timeout value in do_write_oneword()
not accounting for HZ of < 1000, but it appears that change
is already in the 2.6.8 version of cfi_cmdset_0002.c.

One other thing that may or may not be related is the
message at kernel startup (see below) about disabling
erase-suspend-program code.

Does anyone have any input on this do_write_oneword()
failure?

Thanks,
John


# cp /etc/dummy_file t1
MTD do_write_buffer(): WRITE 0x00c712c8(0x00001985)
MTD do_write_buffer(): WRITE 0x00c712e0(0x00000000)
MTD do_write_buffer(): WRITE 0x00c71300(0x00000000)
MTD do_write_buffer(): WRITE 0x00c7032c(0x00001985)
MTD do_write_buffer(): WRITE 0x00c7130c(0x00001985)
MTD do_write_buffer(): WRITE 0x00c71320(0x00000000)
MTD do_write_buffer(): WRITE 0x00c71340(0x00000000)
MTD do_write_buffer(): WRITE 0x00c71350(0x0000785e)**
MTD do_write_buffer(): WRITE 0x00c71360(0x000031e4)
MTD do_write_buffer(): WRITE 0x00c71380(0x00000966)
MTD do_write_buffer(): WRITE 0x00c713a0(0x0000c500)
MTD do_write_oneword(): WRITE 0x00c71350(0x0000165e)**
MTD do_write_oneword(): software timeout
MTD do_write_oneword(): software timeout
MTD do_write_oneword(): software timeout
MTD do_write_oneword(): software timeout
Write of 175 bytes at 0x0003130c failed. returned -5, retlen 174
MTD do_write_buffer(): WRITE 0x00c713bc(0x00001985)
MTD do_write_buffer(): WRITE 0x00c713c0(0x00000000)
MTD do_write_buffer(): WRITE 0x00c713e0(0x0000386d)
MTD do_write_buffer(): WRITE 0x00c71400(0x0000785e)**
MTD do_write_buffer(): WRITE 0x00c71420(0x00005200)
MTD do_write_buffer(): WRITE 0x00c71440(0x00004a6a)
MTD do_write_buffer(): WRITE 0x00c71460(0x0000a572)
MTD do_write_oneword(): WRITE 0x00c71400(0x0000165e)**
Write of 175 bytes at 0x000313bc failed. returned -5, retlen 174
cp: unable to close `t1': Input/output error

**snippet of kernel startup...
Physically mapped flash: Found 1 x16 devices at 0x0 in 16-bit bank
 Amd/Fujitsu Extended Query Table at 0x0040
Physically mapped flash: CFI does not contain boot bank location.
Assuming top.
number of CFI chips: 1
Using buffer write method
cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.
mtd: Giving out device 0 to Physically mapped flash
physmap flash device: 0x1000000 at 0xbf000000
Creating 8 MTD partitions on "Physically mapped flash":
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