Hi,
I'm facing a problem.
I used am335x-evm and I used ti-processor-sdk-linux-am335x-evm-02.00.02.11.
I mounted a 256MByte NAND flash (MT29F2G08AB)
I can boot up the SPL, u-boot then kernel successfully from NAND device.
But when I changed the NAND to 512MByte (JS27HU4G08SDN(512MB))
1. nand boot (SPL, uboot, zImage, ...) => DIP SW 1:off 2:on 3:off 4:off 5:on
ROM boot loader doesn't work anyting...
I am getting continuous "CCCCCCC" characters from UART...
2. SD boot (SPL, uboot) + nand boot(zImage, ...) => DIP SW 1:on 2:off 3:off 4:off 5:off
U-Boot# CCCCCCCC
U-Boot SPL 2014.07-svn354 (Sep 05 2016 - 23:12:51)
read_eeprom
read_eeprom
read_eeprom
read_eeprom
reading args
spl_load_image_fat_os: error reading image args, err - -1
reading u-boot.img
reading u-boot.img
U-Boot 2014.07-svn354 (Sep 05 2016 - 23:12:51)
I2C: ready
DRAM: 1 GiB
NAND: 512 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
reading uboot.env
** Unable to read "uboot.env" from mmc0:1 **
Using default environment
read_eeprom
Net: <ethaddr> not set. Validating first E-fuse MAC
read_eeprom
cpsw, usb_ether
Hit any key to stop autoboot: 0
Booting from nand ...
NAND read: device 0 offset 0x80000, size 0x40000
262144 bytes read: OK
NAND read: device 0 offset 0x200000, size 0x800000
8388608 bytes read: OK
Kernel image @ 0x82000000 [ 0x000000 - 0x2df820 ]
## Flattened Device Tree blob at 88000000
Booting using the fdt blob at 0x88000000
Loading Device Tree to 8fff3000, end 8ffff265 ... OK
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
...................................................................................................
[ 1.245670] nand: device found, Manufacturer ID: 0xad, Chip ID: 0xdc
[ 1.252262] nand: Hynix H27U4G8F2EKA-BM <=(not change kernel)
[ 1.256169] nand: 512 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 128
[ 1.263916] nand: using OMAP_ECC_BCH8_CODE_HW ECC scheme
[ 1.269382] 14 ofpart partitions found on MTD device 8000000.nand
...................................................................................................
nand operation is no problem...
The key difference between these 2 NANDs are:
Size Device ID Page Size ECC bit
2G08: 2Gb(256MB) 0xDA 2112 Bytes 4-bit
4G08: 4Gb(512MB) 0xDC 4352(2176 + 2176) Bytes 4-bit
I do not see why this 512MByte version of NAND should not be supported by the ROM code.
how to use to 512MByte?
thank you your reply.
