UBI error: ubi_io_read in am335x

Hi Anil,

Check this wiki: http://processors.wiki.ti.com/index.php/UBIFS_Support

Hi Biser,

Thanks for your response.

I have gone through the same document, But still getting the error. under kernel drivers any modifications required for 16-bit ECC.

Regards
Anil

Hi Biser,

I am using SDK 6 and Linux 3.2 version. In my -boot according to my nand flash it requires 16 bit ECC. Because i have modified source under u-boot /am335x-evm.h modified as #define CONFIG_NAND_OMAP_ECCSCHEME OMAP_ECC_BCH16_CODE_HW & #define CONFIG_SYS_NAND_ECCPOS. After modified these two files i am able boot my nand by default.

But still i am getting the below same error while connecting to my ubifs.

UBI error: ubi_io_read: error -74 (ECC error) while reading 64 bytes from PEB 0:0, read 64 bytes
UBI error: ubi_io_read: error -74 (ECC error) while reading 512 bytes from PEB 0:2048, read 512 bytes

Any 16 bit ECC modifications are required in my kernel drivers (arch/arm/mach-omap2). Please help me.

Regards,

Anil

 

Hi Biser,

I am new to SDK7 version, Because it is Linux 3.12. But u-boot i can take it and work on SDK7. But for me it is challenge to work on Linux 3.12.

ANOTHER THING, I am not clear with my flash according to datasheet says it is 4-bit ECC. In my datasheet it is mentioned it as "8 Gb, 4-bit ECC, x8 I/O and 3V VCC". Please find my nand datasheet link: www.spansion.com/.../S34ML08G2.pdf and suggest me what should i apply for my nand either 4-bit/8-bit/16-bit ECC.

Please I need more help.

Regards
Anil

Hi Biser,

Thanks ok, Please send me the modifications for SDK 6.0 for BCH-16 support. You mean as per my error it required to change under linux boards or drivers changes right?

OK, I will wait for your response.

Thanks,
Anil

Hi Anil,

Regretfully there is no straightforward way to do this on SDK 6.0. Here is the feedback I got from the factory team:

"We have told other customers to look at the u-boot/kernel from am43xx SDK 7.0 and see the differences from am335x SDK 6.0. I think u-boot isn’t too hard, but the kernel will require more work. I think the omap2.c NAND driver will require the most work."

Hi Biser,

I have no problem with u-boot, Problem i am facing in my drivers. You are suggesting me to apply the am43xx SDK 7.0 patches to my SDK6 linux 3.2 right.

could you please share the SDK location. i did't see the sdk for am43xx on TI site. am43xx SDK 7.0 is also 3.12 linux right?

I will try to do the patches.

Regards

 

Tell me for my understanding the 16 bit -ECC NAND support is it available in AM335X SDK7.0 ??

Or only it supports for AM437XSDK 7.0 ???

Regards

Hi Biser,

That mean i can work on Linux 3.12 from AM335X SDK7.

But I am new to Linux 3.12. my development is not stopping till Linux 3.2. Tomorrow if i want to include more and more patches at that time any way again there is Linux 3.12 dependency.

I will try to modify my all the changes from Linux 3.2 to Linux 3.12.

Please clarify and give the answers to my below queries.

• I am defining my gpio configuration and doing on/off in in my board-am335xevm.c file, how these configuration can define in Linux 3.12 because there is no board file.
• How to define the i2c slave ids
• For matrix keypad it required to define the key maps under board-am335xevm.c and how to define in Linux 3.12
• All the irqs defining in board-am335xevm.c and how in Linux 3.12.
• Define all the mtd partitions under board-am335xevm.c and how in Linux 3.12 ??
• Like i have my doubts to convert from 3.2 to 3.12.

Please help me, so that i can jump from 3.2 to 3.12 version.

Regards

Hi Biser,

Ok thanks, I will work with AM335x SDK 8 (Linux 3.14.26).

Please help me and ask your engineer to reply for my queries to start the process.

Is this SDK8 OS can be portable in AM335X it-seems right (Because it comes default with LCD, Back-light, Bluetooth & Wi-Fi, Host USB, Mini USB, Sensors, UARTs, Ethernet, etc)?

I will wait for your response.

Regards

Hi Anil,

As Biser said, starting from SDK7.0 (kernel 3.12) & the latest version of the sdk: 8.0 (using kernel 3.14) all these configurations are done in device tree.
See the am335x-evmsk.dts, am335x-boneblack.dts & am335x-bonecommon.dtsi files for reference. They are located in arch/arm/boot/dts folder in SDK8.0.

For example:
- the definition of i2c slave ids, you can check the i2c1: i2c@4802a000 device node in arch/arm/boot/dts/am335x-evm.dts, inside that i2c node the following slaves are listed: lis331dlh, tsl2550, tmp275 & tlv320aic3106.
Genereal documentation for i2c node can be found in Documentation/devicetree/bindings/i2c/i2c-omap/txt.

- in the same file (arch/arm/boot/dts/am335x-evm.dts) you can find exampe for matrix keypad: matrix_keypad: matrix_keypad@0

- irqs are defined in different device tree nodes

- an example definition of mtd/nand partitions can be found in Documentation/devicetree/bindings/mtd/gpmc-nand.txt. After /*partitions go here*/ comment you should add your partitions, i.e. :
partition@0 {
label = "NAND.SPL";
reg = <0x00000000 0x000020000>;
};
partition@1 {
label = "NAND.SPL.backup1";
reg = <0x00020000 0x00020000>;
};
partition@2 {
label = "NAND.SPL.backup2";
reg = <0x00040000 0x00020000>;
};
partition@3 {
label = "NAND.SPL.backup3";
reg = <0x00060000 0x00020000>;
};
partition@4 {
label = "NAND.u-boot-spl-os";
reg = <0x00080000 0x00040000>;
};
partition@5 {
label = "NAND.u-boot";
reg = <0x000C0000 0x00100000>;
};
partition@6 {
label = "NAND.u-boot-env";
reg = <0x001C0000 0x00020000>;
};
partition@7 {
label = "NAND.u-boot-env.backup1";
reg = <0x001E0000 0x00020000>;
};
partition@8 {
label = "NAND.kernel";
reg = <0x00200000 0x00800000>;
};
partition@9 {
label = "NAND.file-system";
reg = <0x00A00000 0x0F600000>;
};


For more information on how to create the corresponding device tree nodes use the documents in: Documentation/devictree/bindigs/ & search in the following community wiki: www.devicetree.org/Main_Page

Hope this helps.

Best Regards,
Yordan

Hi Yordan/Biser,

Thank you, I understood. If i have any doubt  i will reply.

Thanks for the support.

Regards

Anil

 

Hi Yordan,

Now i am working with Linux 3.14 and made some changes under drivers. 

I have deleted am335x-evm.dts file from /arch/arm/boot/dts/, without this file still my compilation success and got the zImage.

why?? Could you send me the configuration file to am335x-evm platform. Please find my configuration and give me your comments.

Regards,

Anil

am335x-configuration.txt

Hi Anil,

The config file for AM335x devices is omap2plus_defconfig.  Find the file attached (this is the clean omap2plus_defconfig file, no modifications are done): 

anil kumar23 said:

I have deleted am335x-evm.dts file from /arch/arm/boot/dts/, without this file still my compilation success and got the zImage.

why??

If you've deleted your dts file, then the build system just skips this step & builds all other targets (other dtds, zImage, uImage, etc.). DTB is not called directly in the code by any of the driver files so deleting it will not cause a build error. It is built as a separate image & loaded at boot time by the bootloader & is read/used by the kernel modules: www.devicetree.org/Main_Page

Best Regards, 

Yordan

HI,

I am trying to boot AM335x EVM after ubi.img in NAND and I am getting following error :

[ 2.360598] UBI: attaching mtd9 to ubi0
[ 3.316777] UBI: scanning is finished
[ 3.341255] UBI: volume 0 ("rootfs") re-sized from 1586 to 1924 LEBs
[ 3.348998] UBI: attached mtd9 (name "NAND.file-system", size 246 MiB) to ubi0
[ 3.356323] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
[ 3.363155] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 512
[ 3.369797] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096
[ 3.376715] UBI: good PEBs: 1967, bad PEBs: 1, corrupted PEBs: 0
[ 3.382757] UBI: user volume: 1, internal volumes: 1, max. volumes count: 128
[ 3.389927] UBI: max/mean erase counter: 1/0, WL threshold: 4096, image sequence number: 632741995
[ 3.398935] UBI: available PEBs: 0, total reserved PEBs: 1967, PEBs reserved for bad PEB handling: 39
[ 3.408216] UBI: background thread "ubi_bgt0d" started, PID 871
[ 3.501401] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6
[ 3.507543] davinci_mdio 4a101000.mdio: detected phy mask fffffffe
[ 3.532308] libphy: 4a101000.mdio: probed
[ 3.536355] davinci_mdio 4a101000.mdio: phy[0]: device 4a101000.mdio:00, driver Atheros 8031 ethernet
[ 3.562491] cpsw 4a100000.ethernet: Detected MACID = d4:94:a1:8e:26:8f
[ 3.583365] input: volume_keys.8 as /devices/volume_keys.8/input/input1
[ 3.590881] omap_rtc 44e3e000.rtc: setting system clock to 2000-01-01 00:00:02 UTC (946684802)
[ 3.614755] ALSA device list:
[ 3.617758] No soundcards found.
[ 3.641486] UBIFS: background thread "ubifs_bgt0_0" started, PID 885
[ 3.722297] UBIFS: start fixing up free space
[ 3.763448] UBI: fixable bit-flip detected at PEB 22
[ 3.768443] UBI: schedule PEB 22 for scrubbing
[ 3.953750] UBI: fixable bit-flip detected at PEB 37
[ 3.958751] UBI: schedule PEB 37 for scrubbing
[ 4.082493] UBI: fixable bit-flip detected at PEB 49
[ 4.087495] UBI: schedule PEB 49 for scrubbing
[ 4.634625] UBI: fixable bit-flip detected at PEB 94
[ 4.639629] UBI: schedule PEB 94 for scrubbing
[ 4.702952] UBI: fixable bit-flip detected at PEB 97
[ 4.707944] UBI: schedule PEB 97 for scrubbing
[ 4.953245] UBI: fixable bit-flip detected at PEB 103
[ 4.958338] UBI: schedule PEB 103 for scrubbing
[ 7.481321] UBI: fixable bit-flip detected at PEB 198
[ 7.486435] UBI: schedule PEB 198 for scrubbing
[ 7.512435] UBI: fixable bit-flip detected at PEB 198
[ 7.564486] UBI warning: ubi_eba_copy_leb: read data back from PEB 1967 and it is different
[ 7.572935] UBI error: wear_leveling_worker: error -22 while moving PEB 198 to PEB 1967
[ 7.580977] UBI warning: ubi_ro_mode: switch to read-only mode
[ 7.586859] CPU: 0 PID: 871 Comm: ubi_bgt0d Not tainted 3.14.35 #2
[ 7.593079] Backtrace:
[ 7.595588] [<c00118b0>] (dump_backtrace) from [<c0011ac8>] (show_stack+0x18/0x1c)
[ 7.603201] r6:ddb15cb0 r5:ddc22c00 r4:ddbdddb8 r3:00000000
[ 7.608933] [<c0011ab0>] (show_stack) from [<c05c49fc>] (dump_stack+0x24/0x28)
[ 7.616213] [<c05c49d8>] (dump_stack) from [<c03ec350>] (wear_leveling_worker+0x5d8/0x638)
[ 7.624534] [<c03ebd78>] (wear_leveling_worker) from [<c03eb17c>] (do_work+0x84/0xf8)
[ 7.632406] r10:00000000 r9:00000000 r8:ddb15cf0 r7:ddbee038 r6:ddb15cbc r5:ddb15000
[ 7.640301] r4:ddbd1680
[ 7.642865] [<c03eb0f8>] (do_work) from [<c03ecba0>] (ubi_thread+0xd8/0x188)
[ 7.649941] r6:c0888128 r5:ddbee000 r4:ddb15000 r3:00000000
[ 7.655675] [<c03ecac8>] (ubi_thread) from [<c004fcc0>] (kthread+0xd4/0xec)
[ 7.662675] r10:00000000 r9:00000000 r8:00000000 r7:c03ecac8 r6:ddb15000 r5:00000000
[ 7.670572] r4:ddbdcac0 r3:00000000
[ 7.674189] [<c004fbec>] (kthread) from [<c000e758>] (ret_from_fork+0x14/0x3c)
[ 7.681449] r7:00000000 r6:00000000 r5:c004fbec r4:ddbdcac0
[ 7.687162] UBI error: do_work: work failed with error code -22
[ 7.693118] UBI error: ubi_thread: ubi_bgt0d: work failed with error code -22
[ 7.701192] UBI error: ubi_io_write: read-only mode
[ 7.706139] UBI warning: ubi_eba_atomic_leb_change: failed to write VID header to LEB 0:196, PEB 1393
[ 7.715424] UBIFS error (pid 1): ubifs_leb_change: changing 124928 bytes in LEB 196 failed, error -30
[ 7.724705] UBIFS warning (pid 1): ubifs_ro_mode: switched to read-only mode, error -30
[ 7.732773] CPU: 0 PID: 1 Comm: swapper Not tainted 3.14.35 #2
[ 7.738633] Backtrace:
[ 7.741113] [<c00118b0>] (dump_backtrace) from [<c0011ac8>] (show_stack+0x18/0x1c)
[ 7.748728] r6:0001e800 r5:ffffffe2 r4:00000004 r3:00000000
[ 7.754467] [<c0011ab0>] (show_stack) from [<c05c49fc>] (dump_stack+0x24/0x28)
[ 7.761747] [<c05c49d8>] (dump_stack) from [<c01fd698>] (ubifs_ro_mode.part.11+0x64/0x68)
[ 7.769968] [<c01fd634>] (ubifs_ro_mode.part.11) from [<c01fda94>] (ubifs_leb_change+0x130/0x138)
[ 7.778887] r4:ddad1000 r3:00000000
[ 7.782510] [<c01fd964>] (ubifs_leb_change) from [<c01fc1c0>] (fixup_leb+0x8c/0x144)
[ 7.790283] r7:ddad182c r6:000000c4 r5:ddad1000 r4:0001e800
[ 7.796006] [<c01fc134>] (fixup_leb) from [<c01fd4d8>] (ubifs_fixup_free_space+0x26c/0x36c)
[ 7.804404] r6:00000000 r5:ddad1000 r4:000000c5
[ 7.809063] [<c01fd26c>] (ubifs_fixup_free_space) from [<c01fb970>] (ubifs_mount+0xe74/0x1594)
[ 7.817723] r7:ddbb0a00 r6:ddad1000 r5:00000000 r4:00000000
[ 7.823449] [<c01faafc>] (ubifs_mount) from [<c00cfee0>] (mount_fs+0x4c/0x18c)
[ 7.830703] r10:00000000 r9:00000000 r8:00000000 r7:c0843f5c r6:ddbc7900 r5:00000000
[ 7.838606] r4:00008000
[ 7.841159] [<c00cfe94>] (mount_fs) from [<c00e6d90>] (vfs_kern_mount+0x50/0xe0)
[ 7.848598] r10:00000000 r9:ddbc78c0 r8:00000000 r7:c0843f5c r6:00008000 r5:ddbc7900
[ 7.856501] r4:dd81f140
[ 7.859057] [<c00e6d40>] (vfs_kern_mount) from [<c00e96e0>] (do_mount+0x20c/0xa0c)
[ 7.866670] r8:00008000 r7:ddbc7900 r6:00000000 r5:c083c9f4 r4:c0843f5c r3:00000000
[ 7.874494] [<c00e94d4>] (do_mount) from [<c00ea22c>] (SyS_mount+0x8c/0xc0)
[ 7.881495] r10:c081a6c8 r9:dfea54a0 r8:c081a6f8 r7:00008000 r6:c081a6f8 r5:dd897000
[ 7.889385] r4:00000000
[ 7.891960] [<c00ea1a0>] (SyS_mount) from [<c07e7004>] (mount_block_root+0x11c/0x240)
[ 7.899826] r7:c081a6e8 r6:ddba5000 r5:00008000 r4:ddba5000
[ 7.905551] [<c07e6ee8>] (mount_block_root) from [<c07e73dc>] (prepare_namespace+0xb0/0x1e0)
[ 7.914035] r10:c081a6c8 r9:c081a6c0 r8:c07e64cc r7:c08737c0 r6:c081a6e8 r5:c081a6f8
[ 7.921937] r4:c081a6e8
[ 7.924493] [<c07e732c>] (prepare_namespace) from [<c07e6cd8>] (kernel_init_freeable+0x1bc/0x1cc)
[ 7.933421] r6:c08737c0 r5:00000007 r4:c082764c
[ 7.938085] [<c07e6b1c>] (kernel_init_freeable) from [<c05bff9c>] (kernel_init+0x10/0xf8)
[ 7.946311] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c05bff8c
[ 7.954214] r4:00000000
[ 7.956768] [<c05bff8c>] (kernel_init) from [<c000e758>] (ret_from_fork+0x14/0x3c)
[ 7.964380] r4:00000000 r3:dd87e000
[ 7.967984] CPU: 0 PID: 1 Comm: swapper Not tainted 3.14.35 #2
[ 7.973849] Backtrace:
[ 7.976319] [<c00118b0>] (dump_backtrace) from [<c0011ac8>] (show_stack+0x18/0x1c)
[ 7.983930] r6:0001e800 r5:ffffffe2 r4:ddad1000 r3:00000000
[ 7.989642] [<c0011ab0>] (show_stack) from [<c05c49fc>] (dump_stack+0x24/0x28)
[ 7.996915] [<c05c49d8>] (dump_stack) from [<c01fda80>] (ubifs_leb_change+0x11c/0x138)
[ 8.004881] [<c01fd964>] (ubifs_leb_change) from [<c01fc1c0>] (fixup_leb+0x8c/0x144)
[ 8.012668] r7:ddad182c r6:000000c4 r5:ddad1000 r4:0001e800
[ 8.018380] [<c01fc134>] (fixup_leb) from [<c01fd4d8>] (ubifs_fixup_free_space+0x26c/0x36c)
[ 8.026778] r6:00000000 r5:ddad1000 r4:000000c5
[ 8.031448] [<c01fd26c>] (ubifs_fixup_free_space) from [<c01fb970>] (ubifs_mount+0xe74/0x1594)
[ 8.040097] r7:ddbb0a00 r6:ddad1000 r5:00000000 r4:00000000
[ 8.045819] [<c01faafc>] (ubifs_mount) from [<c00cfee0>] (mount_fs+0x4c/0x18c)
[ 8.053079] r10:00000000 r9:00000000 r8:00000000 r7:c0843f5c r6:ddbc7900 r5:00000000
[ 8.060975] r4:00008000
[ 8.063537] [<c00cfe94>] (mount_fs) from [<c00e6d90>] (vfs_kern_mount+0x50/0xe0)
[ 8.070962] r10:00000000 r9:ddbc78c0 r8:00000000 r7:c0843f5c r6:00008000 r5:ddbc7900
[ 8.078868] r4:dd81f140
[ 8.081430] [<c00e6d40>] (vfs_kern_mount) from [<c00e96e0>] (do_mount+0x20c/0xa0c)
[ 8.089033] r8:00008000 r7:ddbc7900 r6:00000000 r5:c083c9f4 r4:c0843f5c r3:00000000
[ 8.096859] [<c00e94d4>] (do_mount) from [<c00ea22c>] (SyS_mount+0x8c/0xc0)
[ 8.103859] r10:c081a6c8 r9:dfea54a0 r8:c081a6f8 r7:00008000 r6:c081a6f8 r5:dd897000
[ 8.111765] r4:00000000
[ 8.114320] [<c00ea1a0>] (SyS_mount) from [<c07e7004>] (mount_block_root+0x11c/0x240)
[ 8.122193] r7:c081a6e8 r6:ddba5000 r5:00008000 r4:ddba5000
[ 8.127906] [<c07e6ee8>] (mount_block_root) from [<c07e73dc>] (prepare_namespace+0xb0/0x1e0)
[ 8.136389] r10:c081a6c8 r9:c081a6c0 r8:c07e64cc r7:c08737c0 r6:c081a6e8 r5:c081a6f8
[ 8.144297] r4:c081a6e8
[ 8.146851] [<c07e732c>] (prepare_namespace) from [<c07e6cd8>] (kernel_init_freeable+0x1bc/0x1cc)
[ 8.155771] r6:c08737c0 r5:00000007 r4:c082764c
[ 8.160431] [<c07e6b1c>] (kernel_init_freeable) from [<c05bff9c>] (kernel_init+0x10/0xf8)
[ 8.168653] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c05bff8c
[ 8.176560] r4:00000000
[ 8.179113] [<c05bff8c>] (kernel_init) from [<c000e758>] (ret_from_fork+0x14/0x3c)
[ 8.186726] r4:00000000 r3:dd87e000
[ 8.190680] UBIFS: background thread "ubifs_bgt0_0" stops
[ 8.196909] VFS: Cannot open root device "ubi0:rootfs" or unknown-block(0,0): error -30
[ 8.205010] Please append a correct "root=" boot option; here are the available partitions:
[ 8.213455] 1f00 128 mtdblock0 (driver?)
[ 8.218546] 1f01 128 mtdblock1 (driver?)
[ 8.223642] 1f02 128 mtdblock2 (driver?)
[ 8.228721] 1f03 128 mtdblock3 (driver?)
[ 8.233819] 1f04 256 mtdblock4 (driver?)
[ 8.238901] 1f05 1024 mtdblock5 (driver?)
[ 8.243993] 1f06 128 mtdblock6 (driver?)
[ 8.249070] 1f07 128 mtdblock7 (driver?)
[ 8.254166] 1f08 8192 mtdblock8 (driver?)
[ 8.259246] 1f09 251904 mtdblock9 (driver?)
[ 8.264338] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 8.272639] drm_kms_helper: panic occurred, switching back to text console
[ 50.628745] random: nonblocking pool is initialized


Both, u-boot and kernel are using BCH8 ECC.

u-boot/include/configs/am335x_evm.h

#define CONFIG_NAND_OMAP_ECCSCHEME OMAP_ECC_BCH8_CODE_HW

Kernel boot log :

[ 1.821841] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
[ 1.828232] nand: Micron MT29F2G08ABAEAWP
[ 1.832284] nand: 256MiB, SLC, page size: 2048, OOB size: 64
[ 1.837974] nand: using OMAP_ECC_BCH8_CODE_HW ECC scheme

I use following command to create ubi image:

mkfs.ubifs -r rootfs/ -F -o ubifs.img -m 2048 -e 126976 -c 1580 -v
ubinize -o ubi.img -m 2048 -p 128KiB -s 512 -O 2048 -v ubinize.cfg

This is my ubinize.cfg file
[ubifs]
mode=ubi
image=ubifs.img
vol_id=0
vol_size=192MiB
vol_type=dynamic
vol_name=rootfs
vol_flags=autoresize

I follow these steps to flash NAND in u-boot

U-Boot# nand erase.chip

NAND erase.chip: device 0 whole chip
Skipping bad block at 0x0dbc0000
Erasing at 0xffe0000 -- 100% complete.
OK
U-Boot# mmc rescan
U-Boot# fatload mmc 0 0x82000000 MLO
reading MLO
77188 bytes read in 10 ms (7.4 MiB/s)
U-Boot# nand write 0x82000000 0x00000 0x20000

NAND write: device 0 offset 0x0, size 0x20000
131072 bytes written: OK
U-Boot# nand write 0x82000000 0x20000 0x20000

NAND write: device 0 offset 0x20000, size 0x20000
131072 bytes written: OK
U-Boot# nand write 0x82000000 0x40000 0x20000

NAND write: device 0 offset 0x40000, size 0x20000
131072 bytes written: OK
U-Boot# nand write 0x82000000 0x60000 0x20000

NAND write: device 0 offset 0x60000, size 0x20000
131072 bytes written: OK
U-Boot# fatload mmc 0 0x82000000 am335x-evm.dtb
reading am335x-evm.dtb
39256 bytes read in 8 ms (4.7 MiB/s)
U-Boot# nand write 0x82000000 0x80000 0x40000

NAND write: device 0 offset 0x80000, size 0x40000
262144 bytes written: OK
U-Boot# fatload mmc 0 0x82000000 u-boot.img
reading u-boot.img
447356 bytes read in 32 ms (13.3 MiB/s)
U-Boot# nand write 0x82000000 0xc0000 0x100000

NAND write: device 0 offset 0xc0000, size 0x100000
1048576 bytes written: OK
U-Boot# fatload mmc 0 0x82000000 zImage
reading zImage
4293552 bytes read in 266 ms (15.4 MiB/s)
U-Boot# nand write 0x82000000 0x200000 0x800000

NAND write: device 0 offset 0x200000, size 0x800000
8388608 bytes written: OK
U-Boot# fatload mmc 0 0x82000000 ubi.img
reading ubi.img
131072000 bytes read in 7910 ms (15.8 MiB/s)
U-Boot# nand write 0x82000000 0xa00000 0x7D00800

NAND write: device 0 offset 0xa00000, size 0x7d00800
131074048 bytes written: OK
U-Boot# setenv nandroot ubi0:rootfs rw ubi.mtd=9,2048
U-Boot# setenv bootcmd run nandboot
U-Boot# setenv optargs mem=512M
U-Boot# run bootcmd

Any help is appreciated.

thanks
Ankur

Hi Yordan,

I have changed the back-light default value as 0 in am335x-evm.dts file and created am335x-evm.dtb with the below command:

"make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x-evm.dtb"

"make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- omap2plus_defconfig"

"make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j5 zImage"

and got the zImage and copied zImage & am335x-evm.dtb files in to sdcad boot directory and booted my system. After given the following command still it is showing the value as 8. but i have configured the value as 0.

ubuntu@arm ~ $ cat /sys/class/backlight/backlight.9/brightness

8

What i have done the modifications under am335x-evm.dts is not replicating as same. This Linux 3.12/3.14 version is very confusion, Instead of this logic 3.2 Linux tree good for all.

What configuration i need to set for my am335x-evm Board, Is it "tisdk_am335x-evm_defconfig" or "omap2plus_defconfig".

Regards,

Anil.

Hi Ankur,

It seems your NAND is 2K page and OOB size is 64. Your ROM loader will identify the ECC.

First you boot from SD-Card and then in the file system try to flash your ubi.img with the below command:

root#: ubiformat /dev/mtd9 -f ubi.img -s 512 -O 2048

After that you reboot it with NAND boot, It should work.

Regards,
Anil

Hi Anil,

Thanks for your response.

Wondering why flashing from u-boot doesn't work ? These steps are recommended on TI website.

Anyways, I tried following your steps. Booted using SD card and the flashed ubi.img using "ubiformat".

boot is successful but I am get following logs:

Sending select for 10.20.34.32...
Lease of 10.20.34.32 obtained, lease time 691200
/etc/udhcpc.d/50default: Adding DNS 172.16.0.21
/etc/udhcpc.d/50default: Adding DNS 172.16.1.20
done.
Starting system message bus: [   26.374107] UBI: fixable bit-flip detected at PEB 994
[   26.379231] UBI: schedule PEB 994 for scrubbing
[   26.464516] UBI warning: ubi_eba_copy_leb: read data back from PEB 1263 and it is different
[   26.472980] UBI error: wear_leveling_worker: error -22 while moving PEB 994 to PEB 1263
[   26.481029] UBI warning: ubi_ro_mode: switch to read-only mode
[   26.486910] CPU: 0 PID: 871 Comm: ubi_bgt0d Tainted: G           O 3.14.35 #2
[   26.494086] Backtrace:
[   26.496595] [<c00118b0>] (dump_backtrace) from [<c0011ac8>] (show_stack+0x18/0x1c)
[   26.504209]  r6:ddb15cb0 r5:ddd97a00 r4:ddbd2d70 r3:00000000
[   26.509936] [<c0011ab0>] (show_stack) from [<c05c49fc>] (dump_stack+0x24/0x28)
[   26.517220] [<c05c49d8>] (dump_stack) from [<c03ec350>] (wear_leveling_worker+0x5d8/0x638)
[   26.525538] [<c03ebd78>] (wear_leveling_worker) from [<c03eb17c>] (do_work+0x84/0xf8)
[   26.533432]  r10:00000000 r9:00000000 r8:ddb15cf0 r7:ddbee038 r6:ddb15cbc r5:ddb15000
[   26.541327]  r4:dcc91e40
[   26.543895] [<c03eb0f8>] (do_work) from [<c03ecba0>] (ubi_thread+0xd8/0x188)
[   26.550975]  r6:c0888128 r5:ddbee000 r4:ddb15000 r3:00000000
[   26.556705] [<c03ecac8>] (ubi_thread) from [<c004fcc0>] (kthread+0xd4/0xec)
[   26.563708]  r10:00000000 r9:00000000 r8:00000000 r7:c03ecac8 r6:ddb15000 r5:00000000
[   26.571610]  r4:ddbbec00 r3:00000000
[   26.575219] [<c004fbec>] (kthread) from [<c000e758>] (ret_from_fork+0x14/0x3c)
[   26.582482]  r7:00000000 r6:00000000 r5:c004fbec r4:ddbbec00
[   26.588190] UBI error: do_work: work failed with error code -22
[   26.594156] UBI error: ubi_thread: ubi_bgt0d: work failed with error code -22
[   26.601384] (stk) :ldisc installation timeout
[   26.605606] (stk) :ldisc_install = 0dbus.
Starting rpcbind daemon...rpcbind: cannot create socket for udp6
rpcbind: cannot create socket for tcp6
done.
Starting advanced power management daemon: No APM support in kernel
(failed.)
Starting syslogd/klogd: done
Starting Dropbear SSH server: dropbear.
Starting PVR
[   27.175590] UBI warning: ubi_io_read: error -74 (ECC error) while reading 2566 bytes from PEB 78:118824, read only 2566 bytes, retry
[   27.188756] UBI warning: ubi_io_read: error -74 (ECC error) while reading 2566 bytes from PEB 78:118824, read only 2566 bytes, retry
[   27.201676] UBI warning: ubi_io_read: error -74 (ECC error) while reading 2566 bytes from PEB 78:118824, read only 2566 bytes, retry
[   27.214518] UBI: fixable bit-flip detected at PEB 78
[   27.219509] UBI: schedule PEB 78 for scrubbing
[   27.224603] UBI: fixable bit-flip detected at PEB 78
[   27.229590] UBI: schedule PEB 78 for scrubbing
Stopping Bootlog daemon: bootlogd.
mount: mounting /dev/mmcblk0p1 on /media/card failed: No such file or directory
mount: mounting /dev/mmcblk0p2 on /media/fs failed: No such file or directory

Poky (Yocto Project Reference Distro) 1.6.2 am335x-evm /dev/ttyO0

am335x-evm login: [   27.601588] (stk) : timed out waiting for ldisc to be un-installed
[   27.714555] (stk) :ldisc_install = 1(stk) :ldisc installation timeout
[   28.714587] (stk) :ldisc_install = 0(stk) : timed out waiting for ldisc to be un-installed
[   29.718371] Bluetooth: st_register failed -22

Poky (Yocto Project Reference Distro) 1.6.2 am335x-evm /dev/ttyO0

am335x-evm login: [   32.432307] UBIFS error (pid 885): ubifs_leb_write: writing 2048 bytes to LEB 985:18432 failed, error -30
[   32.442089] UBIFS warning (pid 885): ubifs_ro_mode: switched to read-only mode, error -30
[   32.450335] CPU: 0 PID: 885 Comm: ubifs_bgt0_0 Tainted: G           O 3.14.35 #2
[   32.457807] Backtrace:
[   32.460366] [<c00118b0>] (dump_backtrace) from [<c0011ac8>] (show_stack+0x18/0x1c)
[   32.468022]  r6:00004800 r5:ffffffe2 r4:00000004 r3:00000000
[   32.473862] [<c0011ab0>] (show_stack) from [<c05c49fc>] (dump_stack+0x24/0x28)
[   32.481166] [<c05c49d8>] (dump_stack) from [<c01fd698>] (ubifs_ro_mode.part.11+0x64/0x68)
[   32.489443] [<c01fd634>] (ubifs_ro_mode.part.11) from [<c01fd95c>] (ubifs_leb_write+0x144/0x14c)
[   32.498312]  r4:ddad1000 r3:00000000
[   32.501977] [<c01fd818>] (ubifs_leb_write) from [<c01fe398>] (ubifs_wbuf_sync_nolock+0xf8/0x340)
[   32.510821]  r7:00000380 r6:00000800 r5:ddad1000 r4:ddba7690
[   32.516610] [<c01fe2a0>] (ubifs_wbuf_sync_nolock) from [<c01fe8d0>] (ubifs_bg_wbufs_sync+0x120/0x1b4)
[   32.525919]  r7:ddba7690 r6:00000001 r5:00000090 r4:ddad1000
[   32.531710] [<c01fe7b0>] (ubifs_bg_wbufs_sync) from [<c02089c4>] (ubifs_bg_thread+0xc8/0x16c)
[   32.540292]  r9:00000000 r8:00000001 r7:00000000 r6:c0888128 r5:ddbf0000 r4:ddad1000
[   32.548196] [<c02088fc>] (ubifs_bg_thread) from [<c004fcc0>] (kthread+0xd4/0xec)
[   32.555668]  r10:00000000 r9:00000000 r8:00000000 r7:c02088fc r6:ddad1000 r5:00000000
[   32.563627]  r4:ddbbca40
[   32.566209] [<c004fbec>] (kthread) from [<c000e758>] (ret_from_fork+0x14/0x3c)
[   32.573504]  r7:00000000 r6:00000000 r5:c004fbec r4:ddbbca40
[   32.579254] CPU: 0 PID: 885 Comm: ubifs_bgt0_0 Tainted: G           O 3.14.35 #2
[   32.586716] Backtrace:
[   32.589226] [<c00118b0>] (dump_backtrace) from [<c0011ac8>] (show_stack+0x18/0x1c)
[   32.596867]  r6:00004800 r5:ffffffe2 r4:ddad1000 r3:00000000
[   32.602651] [<c0011ab0>] (show_stack) from [<c05c49fc>] (dump_stack+0x24/0x28)
[   32.609947] [<c05c49d8>] (dump_stack) from [<c01fd948>] (ubifs_leb_write+0x130/0x14c)
[   32.617867] [<c01fd818>] (ubifs_leb_write) from [<c01fe398>] (ubifs_wbuf_sync_nolock+0xf8/0x340)
[   32.626735]  r7:00000380 r6:00000800 r5:ddad1000 r4:ddba7690
[   32.632520] [<c01fe2a0>] (ubifs_wbuf_sync_nolock) from [<c01fe8d0>] (ubifs_bg_wbufs_sync+0x120/0x1b4)
[   32.641823]  r7:ddba7690 r6:00000001 r5:00000090 r4:ddad1000
[   32.647583] [<c01fe7b0>] (ubifs_bg_wbufs_sync) from [<c02089c4>] (ubifs_bg_thread+0xc8/0x16c)
[   32.656190]  r9:00000000 r8:00000001 r7:00000000 r6:c0888128 r5:ddbf0000 r4:ddad1000
[   32.664082] [<c02088fc>] (ubifs_bg_thread) from [<c004fcc0>] (kthread+0xd4/0xec)
[   32.671552]  r10:00000000 r9:00000000 r8:00000000 r7:c02088fc r6:ddad1000 r5:00000000
[   32.679488]  r4:ddbbca40
[   32.682093] [<c004fbec>] (kthread) from [<c000e758>] (ret_from_fork+0x14/0x3c)
[   32.689368]  r7:00000000 r6:00000000 r5:c004fbec r4:ddbbca40
[   32.695141] UBIFS error (pid 885): ubifs_bg_wbufs_sync: cannot sync write-buffer, error -30
[   36.788137] random: nonblocking pool is initialized

Poky (Yocto Project Reference Distro) 1.6.2 am335x-evm /dev/ttyO0

am335x-evm login: root
Password:
root@am335x-evm:~# [   49.131815] UBIFS error (pid 6): make_reservation: cannot reserve 160 bytes in jhead 1, error -30
[   49.140792] UBIFS error (pid 6): ubifs_write_inode: can't write inode 4759, error -30
[   49.149887] UBIFS error (pid 6): make_reservation: cannot reserve 160 bytes in jhead 1, error -30
[   49.158911] UBIFS error (pid 6): ubifs_write_inode: can't write inode 492, error -30
[   49.167130] UBIFS error (pid 6): make_reservation: cannot reserve 160 bytes in jhead 1, error -30
[   49.176112] UBIFS error (pid 6): ubifs_write_inode: can't write inode 4760, error -30
[   54.191848] UBIFS error (pid 6): make_reservation: cannot reserve 59 bytes in jhead 2, error -30
[   54.200917] UBIFS error (pid 6): do_writepage: cannot write page 0 of inode 224, error -30
[   54.210437] UBIFS error (pid 6): make_reservation: cannot reserve 160 bytes in jhead 1, error -30
[   54.219457] UBIFS error (pid 6): ubifs_write_inode: can't write inode 224, error -30

Regards

Ankur