Hi-
On a QSB based design, I have problem accessing NAND from u-boot command line.
NAND chip:
MT29F2G08ABBEAH4
• Single-level cell (SLC) technology
• Organization
– Page size x8: 2112 bytes (2048 + 64 bytes)
– Page size x16: 1056 words (1024 + 32 words)
– Block size: 64 pages (128K + 4K bytes)
– Plane size: 2 planes x 1024 blocks per plane
– Device size: 2Gb: 2048 blocks
iMX53 I/F:
PATA, WP# is tied to ground via 4k7, R/B# is pulled up to 1V8 via 4k7.
U-boot patched:
Patched u-boot source code by patches #0170-#0174.
In addition, I added the nand_device_info entry of my NAND chip (0x2c/0xaa) to table_type_7[] table in /drivers/mtd/nand/nand_device_info.c:
{
.end_of_table = false,
.manufacturer_code = 0x2c,
.device_code = 0xaa,
.cell_technology = NAND_DEVICE_CELL_TECH_SLC,
.chip_size_in_bytes = 256LL*SZ_1M,
.block_size_in_pages = 64,
.page_total_size_in_bytes = 2*SZ_1K + 64,
.ecc_strength_in_bits = 4,
.ecc_size_in_bytes = 512,
.data_setup_in_ns = 10,
.data_hold_in_ns = 5,
.address_setup_in_ns = 10,
.gpmi_sample_delay_in_ns = 6,
.tREA_in_ns = -1,
.tRLOH_in_ns = -1,
.tRHOH_in_ns = -1,
"MT29F2G08",
},
After bootup from SD card, I got:
MX53-CSSU U-Boot > nand device
Device 0: NAND 256MiB 1,8V 8-bit, sector size 128 KiB
However, I got following errors:
MX53-CSSU U-Boot > nand erase 0x20000 0x20000
NAND erase: device 0 offset 0x20000, size 0x20000
NAND 256MiB 1,8V 8-bit: MTD Erase failure: -5
OK
MX53-CSSU U-Boot > nand write 0xf8006000 0x0 0x20000
NAND write: device 0 offset 0x0, size 0x20000
nand_do_write_ops: Device is write protected
NAND write to offset 0 failed -5
0 bytes written: ERROR
MX53-CSSU U-Boot > nand read 0xf8006000 0x0 0x20000
NAND read: device 0 offset 0x0, size 0x20000
UnCorrectable RS-ECC Error
UnCorrectable RS-ECC Error
UnCorrectable RS-ECC Error
UnCorrectable RS-ECC Error
...
UnCorrectable RS-ECC Error
131072 bytes read: OK
Can anybody offer some hints on the problems above?
Thanks!
Hi Johan
Yes we are using 1V8 version.
I tried removing 4k7 resistor from WP# but it doesn't seem to work either.
thanks and regards,
Hui
Hallo,
I made also a design with the Imx537 and two nand flash 29F16G08 connected to the PATA lines.
I didn't place a pull up resistor on the WP line and it works fine.
The Bootloader starts from flash, UBOOT and Linux are also working fine.
My NAND flash works on 3V3, are you using the 1V8 version ?
Best regards
Johan