> the jedec spec (which all the spi flashes ive worked with support)
> supports 8bit transfers to get the idcode out, and from there you know
> exactly what manufacturer it is and its device id. and all the spi
> flashes ive used work in 8bit mode. this is also how the u-boot spi
> flash driver operates, as well as the linux kernel spi flash driver.
>
> then for addresses, the first three bytes after the command are simply
> the addresses:
> static void spi_flash_addr(u32 addr, u8 *cmd)
> {
> /* cmd[0] is actual command */
> cmd[1] = addr >> 16;
> cmd[2] = addr >> 8;
> cmd[3] = addr >> 0;
> }
>
> keeping the overrides on these is fine, but the default should match
> this behavior (maybe it does already and i just didnt read the code
> close enough?).
I just remembered that I have a bunch of jedec compliant SPI flashes, they
just aren't currently accessible over JTAG. I can rework a board to put that
flash
in the place of the one that is JTAGable. Then I can go ahead and try to
implement
this the right way. I figure the best way will be for detectflash to
automatically
detect the flash and set the address size appropriately. Otherwise, you will
pass all the required information via command line parameters. How does that
sound?
> if you use git, you should be able to keep things sorted out much
> easier. svn is certainly a pain for managing more than one patch
> locally at a time, but git allows you to rebase your current work onto
> the latest mainline and keep patches separate.
Yeah, I realized that. But I did this over a year ago, and at the time it was
pretty
easy to manage. At some point I gave up on this code ever getting merged and
moved on and checked it into another svn server. Now, I am too lazy to switch.
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