[U-Boot] Strange CFI flash problem

[Matthias Weißer]

Hi

we are currently trying to get an out-of-tree board based on 2013.01 
back in sync with current master and observing a strange behavior which 
we think is located in the CFI flash system. If we load an image via 
tftp, copy it to flash and then try to run the image via bootm we see an 
error while decomressing:

zmx25> tftpboot 0x81000000 zmx25-gfx.lzo.img;
Using FEC device
TFTP from server 192.168.1.60; our IP address is 192.168.1.107
Filename 'zmx25-gfx.lzo.img'.
Load address: 0x81000000
Loading: 
################################################################# 
   #################################################################
#########################################
2.8 MiB/s
done
Bytes transferred = 2508249 (2645d9 hex)
zmx25> erase 0xA0080000 +${filesize};
.................... done
Erased 20 sectors
zmx25> cp.b 0x81000000 0xA0080000 ${filesize};
Copy to Flash... done
zmx25> bootm  0xA0080000;
## Booting kernel from Legacy Image at a0080000 ...
    Image Name:   zmx25-gfx ifs
    Image Type:   ARM QNX Kernel Image (lzo compressed)
    Data Size:    2508185 Bytes = 2.4 MiB
    Load Address: 80000000
    Entry Point:  80000000
    Verifying Checksum ... OK
    Uncompressing Kernel Image ... LZO: uncompress or overwrite error -5 
- must RESET board to recover
resetting ...

After the board is up and running again everything is fine when directly 
booting the image:

zmx25> bootm 0xa0080000
## Booting kernel from Legacy Image at a0080000 ...
    Image Name:   zmx25-gfx ifs
    Image Type:   ARM QNX Kernel Image (lzo compressed)
    Data Size:    2508185 Bytes = 2.4 MiB
    Load Address: 80000000
    Entry Point:  80000000
    Verifying Checksum ... OK
    Uncompressing Kernel Image ... OK
## Starting application at 0x80001cc0 ...

Doing an iminfo after the copy from RAM to flash (following the TFTP 
step) also fixes the problem. Or hides it. We tried with and without 
caches which didn't show any difference.

zmx25> flinfo

Bank # 1: CFI conformant flash (16 x 16)  Size: 32 MB in 256 Sectors
   AMD Standard command set, Manufacturer ID: 0x1C, Device ID: 0x227E2201
   Erase timeout: 8192 ms, write timeout: 1 ms
   Buffer write timeout: 1 ms, buffer size: 64 bytes

zmx25> bdinfo
arch_number = 0x00000C29
boot_params = 0x80000100
DRAM bank   = 0x00000000
-> start    = 0x80000000
-> size     = 0x03C00000
eth0name    = FEC
ethaddr     = 66:15:00:87:02:00
current eth = FEC
ip_addr     = 192.168.1.107
baudrate    = 115200 bps
TLB addr    = 0x83BF0000
relocaddr   = 0x83B6F000
reloc off   = 0xE3B6F000
irq_sp      = 0x83756F38
sp start    = 0x83756F28
FB base     = 0x00000000

Any ideas?

Matthias