This is useful for example when using a secondary onewire controller.

This reverts commit 7e2ee9b4.

You can't put a bitstream into the middle of a tiny EEPROM.
If you intend to build an sdbfs for a switch, make a new image.

It's a preparation for flash support, as there we cannot update
bytes/entries count without erasing entire flash sector.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

- copyright header to local conventions
- fix a little white space
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

- Turn the copyright header to the local convention
- fix a little white space
- fix flash_sdb_check (must return error -- but it's unused)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

The optimization is the removal of the retval variable in
bbspi_transfer() and using the val parameter as a "shift register"
that is returned at the end of the function.
Signed-off-by: Theodor Stana <t.stana@cern.ch>

How-to guide for the tool (together with flash-write tool) can be found in
sdbfs.README.
Signed-off-by: Theodor Stana <t.stana@cern.ch>

SQUASH remove flash-read binary: 598d cdf68
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

The issue was due to a bug in gpio_in, which was doing an AND with
the value of GPIO_SPI_MISO, which was set to the pin offset, instead
of what it was set in the include/syscon.h file.

When I copied the gpio functions from include/syscon.h, I overlooked
the fact that the pins for the gpio functions there are set using
wbgen macros that actually perform the shifting, and I simply copied
the functions and redefined the GPIO_SPI_MISO macros as offsets.

The issue has been fixed by redefining the gpio_in function as an
AND with the value (1 << PIN_NR). This fixes everything.
Signed-off-by: Theodor Stana <t.stana@cern.ch>

Signed-off-by: Theodor Stana <t.stana@cern.ch>

For this to work, I also had to add (in flash.c) setting the
entry-point to the right value (the one where the SDB magic is
detected).

The rest of the commit files are just toying around for testing
purposes.
Signed-off-by: Theodor Stana <t.stana@cern.ch>

There was somewhat of a bug in the spec_write_flash function of
flash-write. The memcpy function was not functioning 'as expected',
so I changed the fixed-size buffer for a pointer and malloc-ed it
to the size. This seems to fix the bug.

The issue about reading the flash status register has yet to be
fixed.
Signed-off-by: Theodor Stana <t.stana@cern.ch>

Signed-off-by: Theodor Stana <t.stana@cern.ch>

The flash-write tool is operational. The call to read status register
from flash-host is not working yet, and that is to be solved. In the
meantime, there are sleep functions inserted where we're supposed
to poll the status register.
Signed-off-by: Theodor Stana <t.stana@cern.ch>

wrc_main still in test-mode, currently doing a read of the first two
sectors (in the purpose of testing flash-write in tools -- see next
commit)

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>