[U-Boot-Users] Where does U-Boot's CFI driver check for top/bottom boot?

[Timur Tabi]

Tolunay Orkun wrote:
> Can you do make clean and #define DEBUG and
> rebuilt and reflash debug build of u-boot. This should enable those
> debug output.

Here's what I get:

FLASH: flash detect cfi
fwc addr fe000000 cmd 0 0 8bit x 8 bit
fwc addr fe000055 cmd 98 98 8bit x 8 bit
is= cmd 51(Q) addr fe000010 is= 0 51
fwc addr fe000000 cmd 0 0000 16bit x 8 bit
fwc addr fe0000aa cmd 98 9898 16bit x 8 bit
is= cmd 51(Q) addr fe000020 is= 0051 5151
fwc addr fe000000 cmd 0 0000 16bit x 16 bit
fwc addr fe0000aa cmd 98 0098 16bit x 16 bit
is= cmd 51(Q) addr fe000020 is= 0051 0051
is= cmd 52(R) addr fe000022 is= 0052 0052
is= cmd 59(Y) addr fe000024 is= 0059 0059
ushort addr is at fe000050 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 fe000026 info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x2
addr[2] = 0x0
addr[3] = 0x0
retval = 0x2
fe000020 : 00 51 00 52 00 59 00 02 00 00 00 40 00 00 00 00  .Q.R.Y..... at ....
fe000030 : 00 00 00 00 00 00 00 27 00 36 00 00 00 00 00 04  .......'.6......
fe000040 : 00 00 00 0a 00 00 00 05 00 00 00 04 00 00 00 17  ................
fe000050 : 00 02 00 00 00 00 00 00 00 02 00 07 00 00 00 20  ...............
fe000060 : 00 00 00 7e 00 00 00 00 00 01 00 00 00 00 00 00  ...~............
fe000070 : 00 00 00 00 00 00 00 00 00 00 ff ff ff ff ff ff  ................
fe000080 : 00 50 00 52 00 49 00 31 00 31 00 00 00 02 00 04  .P.R.I.1.1......
fe000090 : 00 01 00 04 00 00 00 00 00 00 00 b5 00 c5 00 03  ................
manufacturer is 2
size_ratio 1 port 16 bits chip 16 bits
found 2 erase regions
long addr is at fe00005a info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x7
addr[2] = 0x0
addr[3] = 0x0
addr[4] = 0x0
addr[5] = 0x20
addr[6] = 0x0
addr[7] = 0x0
erase_region_count = 8 erase_region_size = 8192
long addr is at fe000062 info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x7e
addr[2] = 0x0
addr[3] = 0x0
addr[4] = 0x0
addr[5] = 0x0
addr[6] = 0x0
addr[7] = 0x1
erase_region_count = 127 erase_region_size = 65536
ushort addr is at fe000054 info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x0
addr[2] = 0x0
addr[3] = 0x0
retval = 0x0
fwc addr fe000000 cmd f0 00f0 16bit x 16 bit
flash detect cfi
fwc addr fe800000 cmd 0 0 8bit x 8 bit
fwc addr fe800055 cmd 98 98 8bit x 8 bit
is= cmd 51(Q) addr fe800010 is= 0 51
fwc addr fe800000 cmd 0 0000 16bit x 8 bit
fwc addr fe8000aa cmd 98 9898 16bit x 8 bit
is= cmd 51(Q) addr fe800020 is= 0051 5151
fwc addr fe800000 cmd 0 0000 16bit x 16 bit
fwc addr fe8000aa cmd 98 0098 16bit x 16 bit
is= cmd 51(Q) addr fe800020 is= 0051 0051
is= cmd 52(R) addr fe800022 is= 0052 0052
is= cmd 59(Y) addr fe800024 is= 0059 0059
ushort addr is at fe800050 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 fe800026 info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x2
addr[2] = 0x0
addr[3] = 0x0
retval = 0x2
fe800020 : 00 51 00 52 00 59 00 02 00 00 00 40 00 00 00 00  .Q.R.Y..... at ....
fe800030 : 00 00 00 00 00 00 00 27 00 36 00 00 00 00 00 04  .......'.6......
fe800040 : 00 00 00 0a 00 00 00 05 00 00 00 04 00 00 00 17  ................
fe800050 : 00 02 00 00 00 00 00 00 00 02 00 07 00 00 00 20  ...............
fe800060 : 00 00 00 7e 00 00 00 00 00 01 00 00 00 00 00 00  ...~............
fe800070 : 00 00 00 00 00 00 00 00 00 00 ff ff ff ff ff ff  ................
fe800080 : 00 50 00 52 00 49 00 31 00 31 00 00 00 02 00 04  .P.R.I.1.1......
fe800090 : 00 01 00 04 00 00 00 00 00 00 00 b5 00 c5 00 03  ................
manufacturer is 2
size_ratio 1 port 16 bits chip 16 bits
found 2 erase regions
long addr is at fe80005a info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x7
addr[2] = 0x0
addr[3] = 0x0
addr[4] = 0x0
addr[5] = 0x20
addr[6] = 0x0
addr[7] = 0x0
erase_region_count = 8 erase_region_size = 8192
long addr is at fe800062 info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x7e
addr[2] = 0x0
addr[3] = 0x0
addr[4] = 0x0
addr[5] = 0x0
addr[6] = 0x0
addr[7] = 0x1
erase_region_count = 127 erase_region_size = 65536
ushort addr is at fe800054 info->portwidth = 2
addr[0] = 0x0
addr[1] = 0x0
addr[2] = 0x0
addr[3] = 0x0
retval = 0x0
fwc addr fe800000 cmd f0 00f0 16bit x 16 bit
16 MB

I'm currently studying what all this means, but I figured I email it now anyway.

> I will look at some AMD part datasheets. If this is generally available
> on all AMD and AMD like parts, we can add it as a patch for AMD only.
> Otherwise, we will either add CONFIG_GEOMETRY_REVERSED definition or
> restrict a patch to specific vendor ids (and possibly part ids) which is
> then a pain to manage.

I'd like to help with this endeavor, although I currently don't know a whole 
lot about flash programming.


-- 
Timur Tabi
Linux Kernel Developer @ Freescale