[U-Boot-Users] 16BIT SPANSION Flash writing problem with CFI Driver

[Sam Song]

Tolunay Orkun <listmember at orkun.us> wrote:
> Sam,
> 
> There is not enough information from your email.

Tolunay, thanks. I added some info below.
......
> 
> Did you verify that you have correct data in
> environment after save? Try

I checked that and saw 'test=1' in new env parameters
after reset. 

> > Bank # 1: CFI conformant FLASH (16 x 16)  Size: 8
> > MB in 128 Sectors Erase timeout 16384 ms, write 
> > timeout 0 ms, buffer write timeout 4096 ms, 
> > buffer size 32
> 
> Looks like your flash part does not support single
> word writes via conventional interface 
> (write timeout is 0). It must use buffered
> writes. Did you enable buffer writes? You probably
> did but just double checking...

I didn't enable buffer writes. Once I defined
CFG_FLASH_USE_BUFFER_WRITE, all save operations
would encounter an error. Actually, I noticed
it was unaccptable to enable buffer write for
AMD flash.

MPC8548E_Rev1.1=> save
Saving Environment to Flash...
Un-Protected 1 sectors
Erasing Flash...
. done
Erased 1 sectors
Writing to Flash... Outside available Flash
Protected 1 sectors
MPC8548E_Rev1.1=>

> Did you enable debug? What was the exact command you
> used to copy data to flash. Did you use cp.b or just


After enable debug in CFI, extra message obtained.

U-Boot 1.1.4 (Nov 19 2006 - 15:55:24), Build:
[......]
Now running in RAM - U-Boot at: 0ffe0000
FLASH: flash detect cfi
fwc addr ff800000 cmd 0 0 8bit x 8 bit
fwc addr ff800055 cmd 98 98 8bit x 8 bit
is= cmd 51(Q) addr ff800010 is= 0 51
fwc addr ff800000 cmd 0 0000 16bit x 8 bit
fwc addr ff8000aa cmd 98 9898 16bit x 8 bit
is= cmd 51(Q) addr ff800020 is= 0051 5151
fwc addr ff800000 cmd 0 0000 16bit x 16 bit
fwc addr ff8000aa cmd 98 0098 16bit x 16 bit
is= cmd 51(Q) addr ff800020 is= 0051 0051
is= cmd 52(R) addr ff800022 is= 0052 0052
is= cmd 59(Y) addr ff800024 is= 0059 0059
ushort addr is at ff800050 info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x2
addr[2] = 0x0
addr[3] = 0x0
retval = 0x2
device interface is 2
found port 2 chip 2 port 16 bits chip 16 bits
ushort addr is at ff800026 info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x2
addr[2] = 0x0
addr[3] = 0x0
retval = 0x2
ff800020 : 00 51 00 52 00 59 00 02 00 00 00 40 00 00
00 00  .Q.R.Y..... at ....
ff800030 : 00 00 00 00 00 00 00 27 00 36 00 00 00 00
00 07  .......'.6......
ff800040 : 00 07 00 0a 00 00 00 01 00 05 00 04 00 00
00 17  ................
ff800050 : 00 02 00 00 00 05 00 00 00 01 00 7f 00 00
00 00  ................
ff800060 : 00 01 00 00 00 00 00 00 00 00 00 00 00 00
00 00  ................
ff800070 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00  ................
ff800080 : 00 50 00 52 00 49 00 31 00 33 00 08 00 02
00 01  .P.R.I.1.3......
ff800090 : 00 01 00 04 00 00 00 00 00 01 00 b5 00 c5
00 04  ................
manufacturer is 2
size_ratio 1 port 16 bits chip 16 bits
found 1 erase regions
long addr is at ff80005a info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x7f
addr[2] = 0x0
addr[3] = 0x0
addr[4] = 0x0
addr[5] = 0x0
addr[6] = 0x0
addr[7] = 0x1
erase_region_count = 128 erase_region_size = 65536
ushort addr is at ff800054 info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x5
addr[2] = 0x0
addr[3] = 0x0
retval = 0x5
fwc addr ff800000 cmd f0 00f0 16bit x 16 bit
 8 MB
L2 cache 512KB: enabled
......
MPC8548E_Rev1.1=> erase ffa00000 ffafffff
......
flash_is_busy: 0
.fwc addr ffaf0aaa cmd aa 00aa 16bit x 16 bit
fwc addr ffaf0554 cmd 55 0055 16bit x 16 bit
fwc addr ffaf0aaa cmd 80 0080 16bit x 16 bit
fwc addr ffaf0aaa cmd aa 00aa 16bit x 16 bit
fwc addr ffaf0554 cmd 55 0055 16bit x 16 bit
fwc addr ffaf0000 cmd 30 0030 16bit x 16 bit
flash_is_busy: 1
flash_is_busy: 1
......
flash_is_busy: 1
flash_is_busy: 1
flash_is_busy: 1
flash_is_busy: 0
. done
Erased 16 sectors
MPC8548E_Rev1.1=> cp.b 1000000 ffa00000 40000
......
flash_is_busy: 1
flash_is_busy: 0
fwc addr ff800aaa cmd aa 00aa 16bit x 16 bit
fwc addr ff800554 cmd 55 0055 16bit x 16 bit
fwc addr ff800aaa cmd a0 00a0 16bit x 16 bit
flash_is_busy: 1
flash_is_busy: 0
fwc addr ff800aaa cmd aa 00aa 16bit x 16 bit
fwc addr ff800554 cmd 55 0055 16bit x 16 bit
fwc addr ff800aaa cmd a0 00a0 16bit x 16 bit
......

After 20 minutes or so, have to reset it to 
stop the debug loop...

MPC8548E_Rev1.1=> cmp 1000000 ffa00000 40000
word at 0x01023b3c (0x40a2ff74) != word at 0xffa23b3c
(0x40a2ffff)
Total of 36559 words were the same
MPC8548E_Rev1.1=>

I once programmed a 128KB file sucessfully but never
for 256KB or above.

> > What could be the problem be? I use the CFI driver
> > from GIT repository on Nov. 2.
> 
> I recently submitted a patch for AMD style flashes
> but it addresses top boot flash geometry reversal. 
> Your flash is uniform sectored. So, it is not
> necessary.

That's really a nice work. Some more boards flash
driver in U-Boot tree can be switched to CFI Driver
like RPXlite's, I think.

Thanks again,

Sam


		
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