The version 3.16.37 is going to be supporter until 2020
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Also remove link to at91_softpwm.h
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

By this we drop support of wrs < 3.30. At least its fan.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

On modern switches the fan are driver by a dedicated FPGA core
that does the PWM. This module is not necessary anymore and not even
the kernel patches to make this module work.
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Our software runs only on a single kind of CPU, so we don't need to calculate
it at every boot. The way how daemons are spawned at boot changed
since the function shw_udelay_init was written. Before daemons were spawned one
after another, now they are spawned at the same time and compete during
initialization phase for the CPU.
The loop calculating loops_per_msec was interrupted by few context switches.
When using the kernel 2.6.39, the problem was not visible and usually
loops_per_msec was estimated correctly.
However, introduction new kernel 3.16 lowered probability of getting
correct results. Probably due to the different behaviour of the scheduler.
Bug was found because HAL was not able to detect SFP with
vn=ZyXEL
pn=SFP-BX1310-10-D
vs=S131151000226
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Explicitly define which version of buildroot should be used.

It solves problem when there is more than one directory matching build/buildroot-2*
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

The variable is unused because there is no need to use it. The color is
white by default; indeed, this variable was set to "WHITE" everytime, but
then not used.
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Today it is not really important to do this because all our modules are
within the project itself. But, at somepoint, we may use submodules
in order to integrate drivers from external sources; so, we need to export
our default values because we will not have control over the other projects
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

We want '/dev/shm' to be empty at boot time. It may happen that
while working with rootfs over NFS this directory is not empty.

With this patch we remove all files from this directory because
they should not be there at all.

What if I put something there on purpose? When using tmpfs,
files in '/dev/shm' will be automatically removed on shutdown.
We are keeping the same behavior. Put your own development files
in '/dev/shm' after the execution of this script by copying them
from another location.

Again, if we use rootfs over NFS and if tmpfs does not work then
the system will use the NFS and the system should continue to work.
In this case the performances will be much worst
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

This way, next time we want to update the kernel we have just to change
the version without touching too much the code
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

The kernel version is hardcoded here. Take it at runtime by using
`uname -r`. This will reduce incompatibilities on kernel updates
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

Complement of a commit:
02bb6153 rootfs: use /etc/ppsi.conf not /wr/etc/ppsi.conf
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

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

Make clear what kind of resolution get_monotonic_tics function returns (micro
seconds).
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Fix the bug introduced by a commit:
291a32c7 userspace/wrsw_hal: use get_monotonic_* instead of clock_gettime

get_monotonic_tics() return a value in us resolution, so to get ms it has to be
divided by 1000, not multiplied.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

--Read DOM (Diagnostic Monitoring data) data from SFPs
--Fix the write to SFPs eeprom
--store DOM data in the HAL's shmem
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

The SFP documentation "INF-8047.pdf" states:
"The serial interface uses the 2-wire serial CMOS E2PROM protocol defined for
the ATMEL AT24C01A/02/04 family of components."

Upon reading that datasheet, some important details stand out:
1) The eeprom can only write in pages, with pages being 8 or 16 bytes. Assuming
   the smallest device, you can only write 8 bytes at a time. To be safe, I'm
   assuming a pagesize of 8 bytes.

   This explains why we only saw stuff change in the first 8 bytes, I guess.

2) A write needs to be preceded by the byte address which is a single byte for
   these devices, and then up to 8 (or 16) data bytes to be written at that
   location. If there are more bytes, or if the data wraps around the page
   binary, it will still only end up on the page belonging to that first
   address.

3) After writing, you need to poll the eeprom to see if it has finished writing
   the byte. At the moment, I'm not doing that yet, instead I'm doing a 10ms
   wait which seems sufficient.
Signed-off-by: Paul Boven <boven@jive.eu>
Acked-by: Adam Wujek <adam.wujek@cern.ch>

Kconfig:
--add CONFIG_READ_SFP_DIAG_ENABLE
libwr:
--add the function shw_sfp_update_dom to update only needed values in the future
--increase HAL_SHMEM_VERSION due to the changes in structures
wrs_dump_shmem
--add new fields
HAL:
--read DOM (Diagnostic Monitoring data) from SFP's eeprom at plug and once
  per second
PPSI:
--uplift hal shmem header
wrs_sfp_dump:
--support reading SFP's DOM from HAL
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

It fixes the bug described in the commit:
userspace/ppsi: uplift ppsi with compliance

(problem with "Support E2E build without P2P. Saves 5kB in wrpc-sw")
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

This commit includes the commit in ppsi
"Support E2E build without P2P. Saves 5kB in wrpc-sw"
However when the option "Avoid building P2P code" is not enabled in
the ppsi's dot-config then I'm getting zeros in the wr_mon or the ppsi exits
with the message:
ERROR: failure in "clock_settime": Invalid argument
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Such error was printed to the syslog
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

It might be usefull to know whether caller wanted to lock or unlock the shmem
and which shmem.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

In shared memory functions take as parameters pinters to structures instead
of void pointers. By this compiler will warn when wrong type of pointer is
passed. For example when pointer to the data in shmem is passed instead of
pointer to the header.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Update callers of wrs_shm_get_and_check to recognize return value
WRS_SHM_INCONSISTENT_DATA. Update to use defined values instead of numbers.

Update:
--snmpd
--tools/rtu_stat
--tools/wr_mon
--tools/wr_phytool
--tools/wrs_sfp_dump
--tools/wrs_vlans
--wrs_watchdog
--wrsw_rtud
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Check the consistency of shmem during opening with wrs_shm_get_and_check.
It was possible that sequence number was increased during the opening, but it
was interpreted as version error.

Add defines describing different return errors.

This change is backward compatible.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Keep explicitly lock bit in the sequence variable as a LSB bit.
This solution is backward compatible. The difference is only when shmem is
lock twice. Before it was treated as unlocked, now still as a lock.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Print error message when shmem is locked or unlocked multiple times.
To be precise it will print error only on even locks or unlocks.

Move the increment of sequence before checking the flags to simplify further
if-conditions.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Remove excessive locks from the function delete_htab_entry.
Function rtu_fd_commit is always guarded with shmem lock. The function
rtu_fd_commit calls rtu_hw_commit, which calls delete_htab_entry. By this
function wrs_shm_write with a parameter WRS_SHM_WRITE_BEGIN was called twice
before it was called twice with a parameter WRS_SHM_WRITE_END.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Lock HAL's shmem on write to let a reader know about potential inconsistent
data

List below indicates which functions requires a lock (marked as "UPDATE").
minipc:
--halexp_lock_cmd:
  --hal_port_enable_tracking - not
  --hal_port_start_lock - UPDATE
  --hal_port_check_lock - not
--halexp_pps_cmd
  --rts_adjust_phase - not
  --shw_pps_gen_adjust - not
  --shw_pps_gen_busy - not
  --hal_port_pshifter_busy - not
  --shw_pps_gen_enable_output - not

hal_port_update_all:
--poll_rts_state - not
--hal_port_poll_sfp:
  --shw_sfp_module_scan - not
  --hal_port_insert_sfp - UPDATE
  --hal_port_remove_sfp - UPDATE
--hal_port_fsm - UPDATE
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>