Nand flash ECC error

could you attach full log from bootup?

Hello, Jack

log is below:

NAND read: device 0 offset 0x6c0000, size 0x300000
 3145728 bytes read: OK
## Booting kernel from Legacy Image at 81000000 ...
   Image Name:   Linux-2.6.37
   Created:      2013-04-22   3:35:23 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    2560032 Bytes = 2.4 MiB
   Load Address: 80008000
   Entry Point:  80008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Linux version 2.6.37 (steven@steven-pc) (gcc version 4.3.3 (Sourcery G++ Lite 2009q1-203) ) #3 Mon Apr 22 11:35:19 CST 2013
CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7f
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: ti8168_dvr
vram size = 20971520 at 0x0
reserved size = 20971520 at 0x0
FB: Reserving 20971520 bytes SDRAM for VRAM
Memory policy: ECC disabled, Data cache writeback
OMAP chip is TI8168 2.0
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 59904
Kernel command line: mem=256M console=ttyO2,115200n8 noinitrd root=/dev/mtdblock4 rw rootfstype=jffs2 vram=20M notifyk.vpssm3_sva=0xBEE00000 ip=p
PID hash table entries: 1024 (order: 0, 4096 bytes)
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 236MB = 236MB total
Memory: 233892k/233892k available, 28252k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
    vmalloc : 0x90800000 - 0xf8000000   (1656 MB)
    lowmem  : 0x80000000 - 0x90000000   ( 256 MB)
    pkmap   : 0x7fe00000 - 0x80000000   (   2 MB)
    modules : 0x7f000000 - 0x7fe00000   (  14 MB)
      .init : 0x80008000 - 0x8003b000   ( 204 kB)
      .text : 0x8003b000 - 0x804d8000   (4724 kB)
      .data : 0x804d8000 - 0x80520a80   ( 291 kB)
SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:407
IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
Total of 128 interrupts on 1 active controller
GPMC revision 6.0
Trying to install interrupt handler for IRQ400
Trying to install interrupt handler for IRQ401
Trying to install interrupt handler for IRQ402
Trying to install interrupt handler for IRQ403
Trying to install interrupt handler for IRQ404
Trying to install interrupt handler for IRQ405
Trying to install interrupt handler for IRQ406
Trying to install type control for IRQ407
Trying to set irq flags for IRQ407
OMAP clockevent source: GPTIMER1 at 27000000 Hz
Console: colour dummy device 80x30
Calibrating delay loop... 999.42 BogoMIPS (lpj=4997120)
pid_max: default: 32768 minimum: 301
Security Framework initialized
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
devtmpfs: initialized
omap_voltage_early_init: voltage driver support not added
regulator: core version 0.5
regulator: dummy:
NET: Registered protocol family 16
omap_voltage_domain_lookup: Voltage driver init not yet happened.Faulting!
omap_voltage_add_dev: VDD specified does not exist!
OMAP GPIO hardware version 0.1
OMAP GPIO hardware version 0.1
omap_mux_init: Add partition: #1: core, flags: 0
_omap_mux_get_by_name: Could not find signal i2c2_scl.i2c2_scl
_omap_mux_get_by_name: Could not find signal i2c2_sda.i2c2_sda
pm_dbg_init: only OMAP3 supported
registered ti81xx_vpss device
registered ti81xx_vidout device
registered ti81xx on-chip HDMI device
registered ti81xx_fb device
bio: create slab <bio-0> at 0
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
USBSS revision 4ea20809
registerd cppi-dma Intr @ IRQ 17
Cppi41 Init Done
omap_i2c omap_i2c.1: bus 1 rev4.0 at 400 kHz
omap_i2c omap_i2c.2: bus 2 rev4.0 at 400 kHz
Advanced Linux Sound Architecture Driver Version 1.0.23.
Switching to clocksource gp timer
musb-hdrc: version 6.0, host, debug=0
musb-hdrc musb-hdrc.0: dma type: dma-cppi41
MUSB controller-0 revision 4ea20800
musb-hdrc musb-hdrc.0: MUSB HDRC host driver
musb-hdrc musb-hdrc.0: new USB bus registered, assigned bus number 1
usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: MUSB HDRC host driver
usb usb1: Manufacturer: Linux 2.6.37 musb-hcd
usb usb1: SerialNumber: musb-hdrc.0
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
musb-hdrc musb-hdrc.0: USB Host mode controller at 9081e000 using DMA, IRQ 18
musb-hdrc musb-hdrc.1: dma type: dma-cppi41
MUSB controller-1 revision 4ea20800
musb-hdrc musb-hdrc.1: MUSB HDRC host driver
musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus number 2
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: MUSB HDRC host driver
usb usb2: Manufacturer: Linux 2.6.37 musb-hcd
usb usb2: SerialNumber: musb-hdrc.1
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
musb-hdrc musb-hdrc.1: USB Host mode controller at 90828800 using DMA, IRQ 19
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 65536 bytes)
TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
NetWinder Floating Point Emulator V0.97 (double precision)
PMU: registered new PMU device of type 0
omap-iommu omap-iommu.0: ducati registered
omap-iommu omap-iommu.1: sys registered
JFFS2 version 2.2. (NAND) �© 2001-2006 Red Hat, Inc.
msgmni has been set to 456
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
omap_uart.0: ttyO0 at MMIO 0x48020000 (irq = 72) is a OMAP UART0
omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1
omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2
console [ttyO2] enabled
brd: module loaded
loop: module loaded
ahci ahci.0: forcing PORTS_IMPL to 0x3
ahci ahci.0: AHCI 0001.0100 32 slots 2 ports 3 Gbps 0x3 impl platform mode
ahci ahci.0: flags: ncq sntf pm led clo only pmp pio slum part ccc
scsi0 : ahci_platform
scsi1 : ahci_platform
ata1: SATA max UDMA/133 mmio [mem 0x4a140000-0x4a150fff] port 0x100 irq 16
ata2: SATA max UDMA/133 mmio [mem 0x4a140000-0x4a150fff] port 0x180 irq 16
omap2-nand driver initializing
ONFI flash detected
ONFI param page 0 valid
NAND device: Maf ID: 0x2c, Chip ID: 0xda (Micron, NAND 256MiB 3,3V 8-bit)
 erasesize: 0x20000, writesize: 2048, oobsize: 64
Creating 7 MTD partitions on "omap2-nand.0":
0x000000000000-0x000000080000 : "U-Boot"
0x000000080000-0x0000000c0000 : "U-Boot Env"
0x0000000c0000-0x0000006c0000 : "U-Boot Logo"
0x0000006c0000-0x0000009c0000 : "Kernel"
0x0000009c0000-0x0000049c0000 : "File System"
0x0000049c0000-0x0000089c0000 : "User Var"
0x0000089c0000-0x000010000000 : "Reserved"
davinci_mdio davinci_mdio.0: davinci mdio revision 1.6
davinci_mdio davinci_mdio.0: detected phy mask ffffff76
davinci_mdio.0: probed
davinci_mdio davinci_mdio.0: phy[0]: device 0:00, driver unknown
davinci_mdio davinci_mdio.0: phy[3]: device 0:03, driver unknown
davinci_mdio davinci_mdio.0: phy[7]: device 0:07, driver unknown
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver dm9601
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
mice: PS/2 mouse device common for all mice
rtc-ds1307 2-0068: rtc core: registered ds1339 as rtc0
omap_rtc omap_rtc: rtc core: registered omap_rtc as rtc1
i2c /dev entries driver
Linux video capture interface: v2.00
usbcore: registered new interface driver uvcvideo
USB Video Class driver (v1.0.0)
OMAP Watchdog Timer Rev 0x00: initial timeout 60 sec
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
notify_init : notify drivercreated  for  remote proc id 2 at physical Address 0xbee00000
usbcore: registered new interface driver snd-usb-audio
Registered tvp5158 audio codec
asoc: tlv320aic3x-hifi <-> davinci-mcasp.2 mapping ok
asoc: HDMI-DAI-CODEC <-> hdmi-dai mapping ok
ALSA device list:
  #0: TI81XX SOUND0
  #1: TI81XX SOUND1
TCP cubic registered
NET: Registered protocol family 17
VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
omap_voltage_late_init: Voltage driver support not added
Power Management for TI81XX.
rtc-ds1307 2-0068: setting system clock to 2013-04-10 11:51:42 UTC (1365594702)
mmc0: new high speed SDHC card at address e624
mmcblk0: mmc0:e624 SD08G 7.40 GiB
 mmcblk0: p1 p2
davinci_mdio davinci_mdio.0: resetting idled controller
net eth0: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0:03, id=1cc915)
net eth1: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0:07, id=1cc915)
Sending DHCP requests .
ata1: SATA link down (SStatus 0 SControl 300)
ata2: SATA link down (SStatus 0 SControl 300)
.
PHY: 0:03 - Link is Up - 1000/Full
PHY: 0:07 - Link is Up - 1000/Full
., OK
IP-Config: Got DHCP answer from 0.0.0.0, my address is 10.2.50.135
IP-Config: Complete:
     device=eth0, addr=10.2.50.135, mask=255.255.255.0, gw=10.2.50.254,
     host=10.2.50.135, domain=AREC.COM, nis-domain=(none),
     bootserver=0.0.0.0, rootserver=0.0.0.0, rootpath=
VFS: Mounted root (jffs2 filesystem) on device 31:4.
devtmpfs: mounted
Freeing init memory: 204K
Starting logging: OK
Starting mdev...
Starting telnet daemon.
Initializing random number generator... done.
Starting system message bus: done
Setting up interface eth1: net eth1: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0:07, id=1cc915)
Starting network time protocol daemon: ntpdJFFS2 notice: (54) check_node_data: wrong data CRC in data node at 0x03fa1cf0: read 0x92abec25, calcu.
.
Starting lighttpd: OK
Starting DHCP server: .
Starting watchdog daemon.
mtd->read(0x800 bytes from 0x355b800) returned ECC error
mtd->read(0x800 bytes from 0x355a800) returned ECC error
mtd->read(0x800 bytes from 0x3558800) returned ECC error

thanks in advance!

Steven

Q1. nand->ecc.steps = 8;

- flash page size = steps * ecc_bytes 

  example:

  2048 = "4" * 512,   4096 = 8 * 512,    we got a ecc value every 512 bytes

Q2. nand->ecc.layout = &hw_nand_oob_p4k;

- ecc's amount/location/... will be different for different page size of flash( such as 2k, 4k). basically it's the same in UBL, UBoot, Kernel...

But sometimes mtd->read(0x800 bytes from 0x355f800) returned ECC error happened.

- did you mean you didn't see the messages during bootup every time?

   if you saw that every time, did you see "always the same" messages?

Hi , Jack,

Sorry for late reply.

I see the message "mtd-read(0x800 bytes from 0x355f800) return ECC error" during bootup every time.

and the messages is the same every time.

The page size of our nand flash is 2K bytes.

So I have modify the nand->ecc.steps = 4 and nand->ecc.layout = &hw_nand_oob_p2k, but result is the same.

BTW,  what effects when I execute:

$ U-BOOT # nandecc hw 2

Is it necessary before I flash jffs2 root filesystem to nand flash?

Thank you very much!

Regards,

Steven