[flashrom] Giving to -i option some real use

[Salvador Eduardo Tropea]

Hi All!

Now I'm using an FPGA board with 4 MiB of flash, was using one with 128 
kiB. So now the time to read/write/verify the whole memory is enough to 
annoy me ;-)
So I tried creating a layout like this:

<--
00000000:00007e2b fpga
00007e2c:003fffff free
<--

Note: yes only 32300 bytes used, the rest can be used for other purposes 
(0,77%).

And then I used "-i fpga".
But it didn't help ... flashrom read the 4 MiB twice (one at the 
beggining and another for the verification).
Looking at the code I found a variable named read_all_first with a 
comment about the lack of implementation.
So I implemented the needed code to:
1) Add a command line option to make it 0 (avoiding the big reads). This 
option can be used only when at least one image is indicated with -i
2) Skip the big read when read_all_first is 0. Only the regions 
indicated by the user are actually fetched from the memory.
3) Same for the verification stage.

Additionally I added a command line option to show the progress, very 
usefull for big memories (and impatient users ;-).

Are these additions desired in the project? If yes: I want to discuss 
the implementation details. If no: I'll just keep them for my use.

Regards, SET

-- 
Ing. Salvador Eduardo Tropea          http://utic.inti.gob.ar/
INTI - Micro y Nanoelectrónica (CMNB) http://www.inti.gob.ar/
Unidad Técnica Sistemas Inteligentes  Av. General Paz 5445
Tel: (+54 11) 4724 6300 ext. 6919     San Martín - B1650KNA
FAX: (+54 11) 4754 5194               Buenos Aires * Argentina