[uClinux-dev] JFFS2/MTD on M5235EVB/BCC

Stefano Caioli caioli at infstudio.it
Fri Oct 14 03:05:57 EDT 2005


Thanks for your prompt answer. I tried to enable MTD_BLOCK but i get this:

JFFS2: Erase block at 0x000f6000 is not formatted. It will be erased
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x000f7000: 0x6564
idjffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x000f7004: 0x6962
idjffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x000f7008: 0x7279
idjffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x000f700c: 0x6c69
idjffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x000f7010: 0x7365
idjffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x000f7014: 0x696f
idjffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x000f7018: 0x696e
idjffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x000f701c: 0x2e6f
idjffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x000f7020: 0x2063
idjffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x000f7024: 0x7275
idFurther such events for this erase block will not be printed
Empty flash at 0x000f7a70 ends at 0x000f7a74
Empty flash at 0x000f7b10 ends at 0x000f7b18
Empty flash at 0x000f7b98 ends at 0x000f7b9c
Empty flash at 0x000f7ba0 ends at 0x000f7ba4
JFFS2: Erase block at 0x000f7000 is not formatted. It will be erased
Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes
empty_blocks 0, bad_blocks 0, c->nr_blocks 248
VFS: Cannot open root device "1f03" or unknown-block(31,3)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,3)

I only reported the last part of the boot process the "idjffs2_scan_eraseblock(): Magic
bitmask...." was very very long.
I knew there was a problem a major number enabling MTD_BLOCK, but perhaps i'm wrong.
Any idea?
However to boot problem from mtd3 (romfs) is still present.
Thanks again.

       Stefano.


On Thu, 13 Oct 2005 15:04:57 -0400, Jate Sujjavanich wrote
> It appears that you need CONFIG_MTD_BLOCK=y.
> 
> - Jate S.
> 
> -----Original Message-----
> From: uclinux-dev-bounces at uclinux.org
> [mailto:uclinux-dev-bounces at uclinux.org] On Behalf Of Stefano Caioli
> Sent: Thursday, October 13, 2005 8:43 AM
> To: uCLinux Mailing List
> Subject: [uClinux-dev] JFFS2/MTD on M5235EVB/BCC
> 
> Hi all,
> i need some help.
> i'm porting uClinux 20050906 kernel 2.6.x to m5235bcc, i have
> sucessfully enable mtd on 2MB external flash, and compiled support for
> JFFS2.
> I choosed these options in kernel config:
> 
> #
> # Memory Technology Devices (MTD)
> #
> CONFIG_MTD=y
> CONFIG_MTD_DEBUG=y
> CONFIG_MTD_DEBUG_VERBOSE=3
> # CONFIG_MTD_CONCAT is not set
> CONFIG_MTD_PARTITIONS=y
> CONFIG_MTD_REDBOOT_PARTS=y
> CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK=-1
> # CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED is not set #
> CONFIG_MTD_REDBOOT_PARTS_READONLY is not set CONFIG_MTD_CMDLINE_PARTS=y
> 
> #
> # User Modules And Translation Layers
> #
> CONFIG_MTD_CHAR=y
> # CONFIG_MTD_BLOCK is not set
> # CONFIG_MTD_BLOCK_RO is not set
> # CONFIG_FTL is not set
> # CONFIG_NFTL is not set
> # CONFIG_INFTL is not set
> 
> #
> # RAM/ROM/Flash chip drivers
> #
> CONFIG_MTD_CFI=y
> CONFIG_MTD_JEDECPROBE=y
> CONFIG_MTD_GEN_PROBE=y
> CONFIG_MTD_CFI_ADV_OPTIONS=y
> CONFIG_MTD_CFI_NOSWAP=y
> # CONFIG_MTD_CFI_BE_BYTE_SWAP is not set # CONFIG_MTD_CFI_LE_BYTE_SWAP
> is not set CONFIG_MTD_CFI_GEOMETRY=y CONFIG_MTD_MAP_BANK_WIDTH_1=y
> CONFIG_MTD_MAP_BANK_WIDTH_2=y CONFIG_MTD_MAP_BANK_WIDTH_4=y #
> CONFIG_MTD_MAP_BANK_WIDTH_8 is not set # CONFIG_MTD_MAP_BANK_WIDTH_16 is
> not set # CONFIG_MTD_MAP_BANK_WIDTH_32 is not set CONFIG_MTD_CFI_I1=y
> CONFIG_MTD_CFI_I2=y # CONFIG_MTD_CFI_I4 is not set # CONFIG_MTD_CFI_I8
> is not set # CONFIG_MTD_CFI_INTELEXT is not set CONFIG_MTD_CFI_AMDSTD=y
> CONFIG_MTD_CFI_AMDSTD_RETRY=0 # CONFIG_MTD_CFI_STAA is not set
> CONFIG_MTD_CFI_UTIL=y CONFIG_MTD_RAM=y CONFIG_MTD_ROM=y #
> CONFIG_MTD_ABSENT is not set
> 
> #
> # Mapping drivers for chip access
> #
> CONFIG_MTD_NETSC520=y
> # CONFIG_MTD_COMPLEX_MAPPINGS is not set CONFIG_MTD_PHYSMAP=y
> CONFIG_MTD_PHYSMAP_START=0xffe00000
> CONFIG_MTD_PHYSMAP_LEN=0x200000
> CONFIG_MTD_PHYSMAP_BANKWIDTH=2
> CONFIG_MTD_UCLINUX=y
> # CONFIG_MTD_SNAPGEARuC is not set
> 
> #
> # Self-contained MTD device drivers
> #
> # CONFIG_MTD_SLRAM is not set
> # CONFIG_MTD_PHRAM is not set
> # CONFIG_MTD_MTDRAM is not set
> # CONFIG_MTD_BLKMTD is not set
> 
> In "Kernel hacking" i passed "root=1f03" to boot from romfs and try some
> JFFS2 experiments, but i get this:
> 
> dBUG> dn
> Downloading Image 'image.bin' from 192.168.0.76 TFTP transfer completed
> Read 2170884 bytes (4241 blocks)
> dBUG> go 0x20000
> Linux version 2.6.12-uc0 (root at www.linux.com) (gcc version 3.4.0) #24
> Thu Oct 15
> 
> uClinux/COLDFIRE(m523x)
> COLDFIRE port done by Greg Ungerer, gerg at snapgear.com Flat model support
> (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne Motorola M5235EVB
> support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)<7>O6 Built 1
> zonelists Kernel command line: root=1f03 PID hash table entries: 128
> (order: 7, 2048 bytes) Dentry cache hash table entries: 4096 (order: 2,
> 16384 bytes) Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
> Memory available: 13888k/16384k RAM, 0k/0k ROM (1034k kernel code, 149k
> data) Mount-cache hash table entries: 512
> NET: Registered protocol family 16
> JFFS2 version 2.2. (NAND) (C) 2001-2003 Red Hat, Inc.
> JFFS2: default compression mode: priority
> i8042.c: i8042 controller self test timeout.
> ColdFire internal UART serial driver version 1.00 ttyS0 at 0x40000200
> (irq = 77) is a builtin ColdFire UART
> ttyS1 at 0x40000240 (irq = 78) is a builtin ColdFire UART io scheduler
> noop registered io scheduler cfq registered RAMDISK driver initialized:
> 16 RAM disks of 4096K size 1024 blocksize FEC ENET Version 0.2
> eth0: ethernet 00:cf:52:35:cf:01
> PPP generic driver version 2.4.2
> fec: PHY @ 0x1f, ID 0x00221619 -- KS8721BL physmap flash device: 200000
> at ffe00000
> phys_mapped_flash: Found 1 x16 devices at 0x0 in 16-bit bank
> Amd/Fujitsu Extended Query Table at 0x0040 number of CFI chips: 1
> cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.
> Searching for RedBoot partition table in phys_mapped_flash at offset
> 0x1f0000 No RedBoot partition table detected in phys_mapped_flash
> mtd: Giving out device 0 to phys_mapped_flash NetSc520 flash device:
> 0x200000 at 0xffe00000 netsc520 Flash Bank: Found 1 x16 devices at 0x0
> in 16-bit bank  Amd/Fujitsu Extended Query Table at 0x0040 number of CFI
> chips: 1
> cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.
> Creating 2 MTD partitions on "netsc520 Flash Bank":
> 0x00000000-0x00040000 : "dBUG (256k)"
> mtd: Giving out device 1 to dBUG (256k)
> 0x00040000-0x00200000 : "user (1792k)"
> mtd: Giving out device 2 to user (1792k)
> uclinux[mtd]: RAM probe address=0x147ff4 size=0xf8000 Creating 1 MTD
> partitions on "RAM":
> 0x00000000-0x000f8000 : "ROMfs"
> mtd: Giving out device 3 to ROMfs
> uclinux[mtd]: set ROMfs to be root filesystem
> NET: Registered protocol family 2
> IP: routing cache hash table of 512 buckets, 4Kbytes TCP established
> hash table entries: 1024 (order: 1, 8192 bytes) TCP bind hash table
> entries: 1024 (order: 0, 4096 bytes)
> TCP: Hash tables configured (established 1024 bind 1024)
> NET: Registered protocol family 1
> NET: Registered protocol family 17
> VFS: Cannot open root device "1f03" or unknown-block(31,3) Please append
> a correct "root=" boot option Kernel panic - not syncing: VFS: Unable to
> mount root fs on unknown-block(31,3)
> 
> I tried to specify different values for "root=" 1f00,1f01,1f02 and in
> same cases i get:
> 
> VFS: Cannot open root device "<NULL>" or unknown-block(0,0)
> 
> I hope some gentle soul  can provide me some clues.
> Regards,
> 
>                Stefano
> 
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