Attention is currently required from: Simon Buhrow, Alan Green.
Simon Buhrow uploaded patch set #24 to this change.
ft2232_spi.c: Pack WREN and op in one ftdi_write_data() call
Every ftdi_write_data() call is quite time consuming as the ftdi-chips
seems to take always 2-3ms to respond.
This leads to what the comment already says: Minimize USB transfers
by packing as many commands as possible together.
So I packed the WREN command together with the following operation
which can be program or erase operation.
This saves about 1 minute when programming a 128MBit Flash with my
config!
I am using ftdi-2232H chip. That is why I put it at this place.
If anyone has a good overview about all programmers:
This could be implemented in spi_write_cmd() in case that it is
compatible to all programmers
or this principle could be transfered to other programmers which act
in a similar way.
Signed-off-by: Simon Buhrow <simon.buhrow@posteo.de>
Change-Id: Ie4a07499ec5ef0af23818593f45dc427285a9e8a
---
M ft2232_spi.c
1 file changed, 90 insertions(+), 1 deletion(-)
git pull ssh://review.coreboot.org:29418/flashrom refs/changes/77/40477/24
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