flashrom, and 4-byte addressing SPI (example: MX25L25635E)

[Евгений]

Good day. MacOS+Homebrew+flashrom.

Flashrom does not understand 4 byte addressing (chips > 16MB). With 3 
byte addressing work perfectly (chips <= 16MB).

May you add 4 byte addressing for SPI flash? Example MX25L25635E - 32MB 
uses in different new routers.

CH341 in Windows work with 4 byte and read/write flash and registers 
from this SPI flash:

JEDEC ID(9F) = 0xC22019
RES ID(AB) = 0x001818
REMS ID(90) = 0x00C218

Sreg: 00000000(0x00), 11111111(0xFF), 00000111(0x07)

but on MacOS not software that can do it.

[Daniel Thompson]

On Mon, Jan 28, 2019 at 01:01:20AM +0200, Евгений wrote:
> Good day. MacOS+Homebrew+flashrom.
>
> Flashrom does not understand 4 byte addressing (chips > 16MB). With 3 byte
> addressing work perfectly (chips <= 16MB).
>
> May you add 4 byte addressing for SPI flash? Example MX25L25635E - 32MB uses
> in different new routers.

Can you explain better what you mean? AFAIK there is already support
for 4 byte addressing (called FEATURE_4BA in the sources), see:
https://github.com/flashrom/flashrom/issues/23

Daniel.
> CH341 in Windows work with 4 byte and read/write flash and registers from
> this SPI flash:
>
> JEDEC ID(9F) = 0xC22019
> RES ID(AB) = 0x001818
> REMS ID(90) = 0x00C218
>
> Sreg: 00000000(0x00), 11111111(0xFF), 00000111(0x07)
>
> but on MacOS not software that can do it.
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