The present defaults for the open and close for device drivers which
provide no methods does not make any sense, and is not used by any
driver.

It is a pretty hard to come up with even a theoretical

The present defaults for the open and close for device drivers which
provide no methods does not make any sense, and is not used by any
driver.

It is a pretty hard to come up with even a theoretical concept of
a device driver which would always fail open and close with ENODEV.

Change the defaults to be nullopen() and nullclose() which simply
does nothing.

Remove explicit initializations to these from the drivers which
already used them.

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Be less confusing in a comment.

Use __FBSDID().
Also some minor style cleanups.

Prefer new location for dev/pci/pci*.h

Almost the finished article.

Boost sample rate to 1.25 MSPS since that allows us to use a 5Mhz
(/4) or 10Mhz (/8) external clock.

Make the interrupt both MPSAFE and FAST, at 610 interrupts a second

Almost the finished article.

Boost sample rate to 1.25 MSPS since that allows us to use a 5Mhz
(/4) or 10Mhz (/8) external clock.

Make the interrupt both MPSAFE and FAST, at 610 interrupts a second,
and a max time to service of 5 msec, we brake for nobody.

Use kernel thread to accumulate into the 25 possible wave signals.

Use #ifdef _KERNEL to let .c file double as .h file defining the ioctls.

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Add a rudimentary but working driver for the Adlink "NuDaq PCI-9812".

This is a 4 channel 20 msps 12 bit ADC card.

Anyone wanting to play with GNUradio or similar can start here.