remove the folder where zio lists all the available triggers, buffers
and devices. Now you can find devices at /sys/bus/zio/devices/, and
retrive the list of the available triggers and buffers from:
/sys/bus/zio/available_buffers
/sys/bus/zio/available_triggers

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>

Now all the zio objects are handled with the device structure

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>

ad7887 and ad7888 are now handled by the same driver.
The driver requires data only for enabled channels

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

Every device must has the zio attribute "resolution-bits" on any level of
the device hierarchy. Internally, the preferred name for fields
and variables is "nbits".

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

The current control used to be per-trigger (i.e., per-cset).
However, some parameters are per-channel (like the gain),
so each channel now has its own current control structure.

Also, zio-dump now shows device and trigger attributes, both standard
and
extended ones.

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

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

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

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

If a zio object declares a set of read only attributes and it doesn't
need s_op->info_get(), it can avoid the s_op assignment, so zattr_show
now checks if s_op is defined before calling it.

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

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

When disabling a trigger, ZIO invokes t_op->abort() to stop acquisition.
If the abort function invokes data_done() to return partial
blocks, the ZTI_BUSY flag is correctly cleared. But, if the abort
function frees all active blocks the flag remains set.

With this patch, always clear the ZTI_BUSY flag when the trigger is
disabled so it is correct if/when the trigger is re-enabled.

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

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

The bug was evident in zio_change_current_buffer. When you change the
buffer, zio registers a new bi, but the old __bi_register() overwrites
the current bi in use by the channel; so, when zio tries to unregister
the old bi, there is not any reference to it.

Now you must assign a bi to a channel after its registration. For
simmetry and to prevent future bugs, also ti assignment must be done
after __ti_registration().

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

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

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

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

To fix, set n_std_attr only if some std attributes are defined

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

We always said we need analogue, digital and TDC/DTC support, so
add a type name for time converters. Meanwhile, reserve one bit
more so we may have up to 8 types -- but sure we don't want to state
what kind of physical measure does the analogue value represent.

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

This patch adds the dev_id field in the control structure, to
identify different devices driven by the same driver, when the bus
abstraction will be completed.

Fields are also reordered: now hostid, devname, dev_id, cset_i and
chan_i are consecutive; thus, they can defined as a sockaddr_zio
structure for the forthcoming PF_ZIO infrastructure, without changing
the control structure again.

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>

bugfix: add zio_device_put on error

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>

ZIO uses the device-level spinlock to protect device registers
during access; a buffer or a trigger instance can be assigned to
only one device on ZIO and if they are hardware implemented they
also live on the same perihperals. So we serialize all the
configuration operations on device, trigger and buffer by using
zio_device->lock.

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

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

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

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

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

We don't have file_operations in the trigger since 5e3c6c8b

,
remove the related comment too (we forgot earlier).

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

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

The program receives from the command line the name of a zio
data file and a number of blocks. It retrieves the blocks
and sends them to stdout. It gets zio data using mmap() if
available, otherwise read.

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

This buffer uses vmalloc and allows mmap from user space.  It started
as a copy of buf-kmalloc, so you can diff to change what is needed
to support mmap over a read/write buffer type.

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

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

I used a wrong dev_data in free_irq. Now it works properly on unload.

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

The vmalloc buffer uses the same names for structure (to ease "diff"
users in understanding it) so the slab name can't be the structure name.

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

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

We will have buffers that use the default operations (the majority) and
buffers without file operations for in-kernel activities, like the
input subsystem. In the latter case we want the cdev to refuse being
openend, so NULL is reserved for that case.

Also, add v_op to the buffer, so it can support mmap.

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

If you only read one channel, alloc_block commonly fails (with
byte-oriented buffers; block-oriented ones fails on store_block).
So don't print to the console when it happens.

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

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

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

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

If a trigger instance is busy, so you cannot change the trigger. You
must wait until data_done, or diasable the trigger before.

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