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running on Dolphin timing.

all ADC cards advertised by IOP were actually there. Example: IOP
model has 6 ADCs defined, but only found 3 on bus. Not normal in
production systems , but often the case  in test systems.

core locking, which is not really supported (lots of messages
fill dmesg). Changed this to use udelay call instead, as in
the rest of the FE code.

  - Modified user model mapping to account for any missing cards.
  - Brought the user space code for user apps up to date with new
    DAC mapping scheme.
  - Moved DAC channel deallocation routine to common app_dac_functions.c
    for use by both user model kernel and user space code.

Additional bounds checks in local_dc, dix_xmit, dix_recv.c

See merge request !156

Removed an unused buffer in local_dc.c.  Updated the local_dc checks to be against the size of the output buffer, instead of the old 4mb/s limit.  This could be put back in, but needs to take into account a variable sized output buffer.

Added some checks to dix_xmit/recv to test for size before reading from/writing to the dolphin buffers.

As a temporary startup timing fix for special case of LHO PEM mid,
added Parameter block entry lhomid=1. If set in IOP model, this will
correct the 1 second timing offset of those units at startup.
This will be removed once LHO mids are upgraded to long range IOC.

  FIFO empty.
- Removed duplicate DAC status info passing routine from app_dac_functions.c
  as routine already exists in dac_info.c.
- Fix for DAC overrange status bit.

Daqd diagnostics

See merge request !155

channel parameters in the DAQ.ini file. It appears later Perl
does not maintain ordering of fields in its db records. To get
around this, changed fmseq.pl to write DAQ .ini file entries
in a hardcoded order.

Add a parameter to the daqd 'DUMP_BROADCAST_FRAME' which keeps the broadcast frame that has gps % 60 = 0 around for 1 minute.

This is actually a checksum of he data block checksums, so that we only compute the checksum once (when we verify the data) for the data.

The data is being exported as {PREFIX}PRDCR_DATA_CRC

Involved
  - Adding dacAcr to cdsHardware structure to pass info upstream.
  - Modify DAC drivers to pass info on startup
  - Modify MEDM screen generator to add info.

DAC FIFO checking difficult to predict in this mode and tended
to add longer loop delays.

Removed AI chassis status bit from FE_STATS screen for 16bit DAC modules

  - Increased model part limit from 6000 to 8000
  - Replaced all tabs with 4 spaces in file

- Modified feCodeGen and Parameters to provide settings to force 1pps sync for test.
- ControllerIop.c sync21pps code changed to use iop_adc_read.
	- Removed sync21pps code from iop_adc_functions (errant code)
- Modified iop_dac_functions.c, check_dac_buffer() to set DAC error
  only in case FIFO FULL for 1pps and no sync modes
- Modified controller.h to set a lower threshold for 1pps sync signal
- Modified cdsHardware.h to set a different ADC for 1PPS when in test mode

Expanding the analyze function of mbuf_probe to look for data overflows.

See merge request !154

Look for data + tp != total data size

- Alarm point for reading first ADC increased from 20 to 23usec, as in V3.4 release
- Diag fix for DAC modules when running without LIGO timing system.

Closes #143, Add more epics variables to the edc.

Closes #143

See merge request !152

Adds in 3 new epics variables to the edc.  If selected in the edc ini file they are always available.

 * prefix UPTIME_SECONDS
 * prefix DATA_RATE_KB_PER_S
 * prefix GPS

Their data is also exported in the json debug dump as the following fields:

 * Uptime
 * DataRateKbPerSec
 * Gpstime

Closes #158, make mbuf conditionally verbose.

Closes #158

See merge request !149

Expose a new sysfs endpoint, kernel/mbuf/verbosity.  This contains an
integer value which defaults to 0.  When set to non-zero the mbuf driver
is put into verbose mode and outputs debug information on each connection
and command.  If regular (non-verbose) it is silent.

Errors in allocation and issues on startup still always issue printk calls.

- Updated NEWS for changes upcoming in 4.0.2