Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

Some of the information in there was old, and we should rather extract
the files in Documentaion/zio/ from the doc/zio-manual.txt .
Currently, just remove the old information.

Please, users, read material in doc/ instead (or the pdf on ohwr.org).

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

This is an incompatible change for buffer authors. We don't think
there are any out-of-tree buffers, though.  The allocation
function must allocate the control by itself, instead of
receiving it from outside.  The reason why the control was passed
doesn't hold any more, and the upcoming PF_ZIO buffer will
greatly benefit from this.

Also, now alloc_block returns NULL on error, so it can be used directly
by the caller (it used to be ERR_PTR).

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Federico Vaga authored 12 years ago and Alessandro Rubini committed 12 years ago

This is more in line with current kernel practices. We do
not use zio_ here because the context is always clear when this
macro is used.

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

It is difficult to support a board which has pre-samples and
post-samples registers and synchronize these value with the nsamples
zio_attribute and control field. But, it is really simple for board that
hasn't pre and post samples to use these two attributes because they can
use only one attribute for their purpose (only pre-sample or only
post-sample).

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

When a device has several input or output csets, we usually want
a different data-transfer function for each of them. Using a function
specific to each cset simplifies things a little.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

no existing trigger uses the file_operations, and the design
evolved towards a pipeline, where there always is a buffer
exchanging data with the trigger

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

The argument is a relic of original design and was used incorrectly.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Randy Dunlap authored 13 years ago and Alessandro Rubini committed 13 years ago

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Alessandro Rubini <rubini@gnudd.com>

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

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

Manohar Vanga authored 13 years ago and Alessandro Rubini committed 13 years ago

Signed-off-by: Manohar Vanga <manohar.vanga@cern.ch>

This changes some method and stuff, in order to make all input and
output be cset-based. This solves a number of issues with the previous
setup. Thus, even drivers must be made differentlym abd this fixes
zio-zero accordingly.

As a side effect, we have a data_done method in trigger ops, so the device
can tell when it is done. And the fire_trigger returns void, since it
cannot wait for stuff to be done. See documentation for details.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Federico Vaga <federico.vaga@gmail.com>

docs for general-cset

Federico Vaga authored 13 years ago and Alessandro Rubini committed 13 years ago

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Federico Vaga <federico.vaga@gmail.com>

These files document how ZIO works. They are still subject
to modification while we are writing code, and some information,
for example how devices work, are still missing.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Federico Vaga <federico.vaga@gmail.com>