Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Toss bogus mergeinfo.

MFC r235634

Fix and update battery status bits according to linux driver

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Implement more of __ibsta: END and SRQI status bits (taken out of the
uPD7210 IRQ status).

MFC after: 1 week

Fix __retval vs. retval confusion: retval is meant to store the (userland)
pointer where data is to be returned by ibask() (currently unimplemented),
while __retval holds the value returned by the libgpib ibfoo() functions.

The confusion resulted in the ibfoo() functions returning an uninitialized
value except in situations where the GPIB activity has been terminated
abnormally.

MFC after: 3 days

GPIB overhaul, part #2: make the tnt4882 driver work with the newer
TNT5004 IC. This involved a major rewrite of a number of things, as
this chip no longer supports the NAT7210 legacy mode but requires the
host to use the (more modern) FIFO mode.

In theory, this also ought to work on the older TNT4882C chip. I'll
probably add this as optional support (perhaps by a device.hints flag)
later on. By now, FIFO mode is *only* activates iff a TNT5004 chip
has been detected (where the old code didn't work at all), while
everything else is supposed to use the old code.

MFC after: 2 weeks

Fix breakage introduced to the tnt4882 driver in r202870. This PCI
frontend uses the same uPD7210 backend as the pcii ISA frontend, so
the backend has to cope with both situations.

Also, hide the first printf in pcii_probe (address mismatch) behind
bootverbose as the ISA bus parent tries to probe all configured ISA
devices against each driver, so a the console has been cluttered with
this message for a bunch of unrelated driver probes.

MFC after: 3 days

Overhaul of the pcii driver:

. Properly allocate all IO space resources. These cards scatter their
IO addresses over a range of 0x1600 bytes, and they require an
additional address for "special interrupt handling".

. Implement the "special interrupt handling" per the GPIB-PCIIA
Technical Reference Manual; this was apparently not declared for the
clone card this driver has been originally implemented for, but it
turned out to be needed for both, an original NI brand PCII/PCIIA
card as well as the Axiom AX5488 clone.

. Add some diagnostic messages for various resource allocation etc.
failures during probe.

. Add some comments about the structure of the IO address space that
is used by these cards.

MFC after: 1 day

Make isa_dma functions MPSAFE by introducing its own private lock. These
functions are selfcontained (ie. they touch only isa_dma.c static variables
and hardware) so a private lock is sufficient to prevent races. This changes
only i386/amd64 while there are also isa_dma functions for ia64/sparc64.
Sparc64 are ones empty stubs and ia64 ones are unused as ia64 does not
have isa (says marcel).

This patch removes explicit locking of Giant from a few drivers (there
are some that requires this but lack ones - this patch fixes this) and
also removes the need for implicit locking of Giant from attach routines
where it's provided by newbus.

Approved by: ed (mentor, implicit)
Reviewed by: jhb, attilio (glanced by)
Tested by: Giovanni Trematerra <giovanni.trematerra gmail com>
IA64 clue: marcel

Remove the distinction between device minor and unit numbers.

Even though we got rid of device major numbers some time ago, device
drivers still need to provide unique device minor numbers to make_dev().
These numbers are only used inside the kernel. They are not related to
device major and minor numbers which are visible in devfs. These are
actually based on the inode number of the device.

It would eventually be nice to remove minor numbers entirely, but we
don't want to be too agressive here.

Because the 8-15 bits of the device number field (si_drv0) are still
reserved for the major number, there is no 1:1 mapping of the device
minor and unit numbers. Because this is now unused, remove the
restrictions on these numbers.

The MAXMAJOR definition was actually used for two purposes. It was used
to convert both the userspace and kernelspace device numbers to their
major/minor pair, which is why it is now named UMINORMASK.

minor2unit() and unit2minor() have now become useless. Both minor() and
dev2unit() now serve the same purpose. We should eventually remove some
of them, at least turning them into macro's. If devfs would become
completely minor number unaware, we could consider using si_drv0 directly,
just like si_drv1 and si_drv2.

Approved by: philip (mentor)

Replace callout_init(..., 1) with callout_init(..., CALLOUT_MPSAFE) for
better grep-compliance and to standardize with the rest of the kernel.

Reviewed by: jhb
MFC after: 1 week

Catchup with filters

Don't be noisy in case of shared interrupts.

Make resources do the right thing by design instead of accident.

Found with: Coverity Prevent(tm)

Use new bus_space/resource convenience functions.

Pretend the 10-bit I/O ISA addressing is not our problem.

First cut at a driver for National Instruments PCI-GPIB hardware.

Hardware donated by: "Greg Maciejewski" <gregm@serverpit.com>

Allocate unit numbers with unr, implement detach function.

Remove public declarations of variables that were forgotten when they were
made static.

Don't leak mutex on open failure.

Add placeholder mutex argument to new_unrhdr().

Always go to standby efter each call.

Don't disable interrupts on a stray interrupt.

Check handle types.
Implement more device functions.
Make DMA optional.

Add ibcntl as alias for ibcnt
Add ibsta and start to use it.
Rename the argument structure more sensibly.
Improve timeout and error handling

Split the ibfoo API into its own file.
Implement ibdma() (only affects ibrd() mode)
Implement ibeot()

Fix prototype for ibeot()

Make sure the last command byte makes it onto the wire.

Improve EOS handling.

Statification

Constify.

Allocate more space for softc. Amazing my machine survived this.

Further elaborate the GPIB driver. We now support a minimal subset of
the ibfoo() API.

Forgot to mark the IRQ as MPSAFE.

Add a IEEE488 driver for PCIIA compatible cards.

This driver implements "unaddressed listen only mode", which is what
printers and plotters commonly do on GP-IB busses.

This means that you can capture print/plot like output from your
instruments by configuring them as necessary (good luck!) and

cat -u /dev/gpib0l > /tmp/somefile

Since there is no way to know when no more output is comming you
will have to ctrl-C the cat process when it is done (that is why
the -u is important).