Remove FDDI support.

branches: 1.35.4;
Merge isaki-audio2 branch, the overhaul of audio subsystem.
- Interrupt-oriented system rather than thread-oriented.
- Improve stability, quality and performance.
- Split playback and record cleanly. Improve halfduplex support.
- Many bugs are fixed including deadlocks, resource leaks, abuses, etc.
- Simplify audio filter mechanism. The encoding/channels/frequency
conversions are completely handled in the upper layer. So the hard-
ware driver only converts its hardware encoding (if necessary).
- audio_hw_if changes:
- Obsoletes query_encoding and add query_format instead.
- Obsoletes set_params and add set_format instead.
- Remove drain, setfd, mappage.
- The call sequences are changed.
- ioctl AUDIO_GETFD/SETFD, AUDIO_GETCHAN/SETCHAN are obsoleted.
- ioctl AUDIO_{QUERY,GET,SET}FORMAT are introduced.
- cleanup config attributes: au*conv and mulaw.
- All hardware drivers should follow it (I've done as much as possible).

Some file paths are changed:
- dev/audio.c -> dev/audio/audio.c (rewritten)
- dev/audiovar.h -> dev/audio/audiovar.h
- dev/audio_dai.h -> dev/audio/audio_dai.h
- dev/audio_if.h -> dev/audio/audio_if.h
- dev/audiobell.c -> dev/audio/audiobell.c
- dev/audiobellvar.h -> dev/audio/audiobellvar.h
- dev/mulaw.[ch] -> dev/audio/mulaw.[ch] + dev/audio/alaw.c

branches: 1.34.16; 1.34.20;
TURBOchannel usb/gpio driver from Felix Deichmann

branches: 1.33.48; 1.33.68;
Add the bus devclass to tc

branches: 1.32.10; 1.32.14;
Remove some whitespace.

branches: 1.31.26; 1.31.28; 1.31.32; 1.31.34;
There seems to be no good reason for sfbp(4) to be commented out here, and its
state is breaking alpha builds. I'll uncomment it and see what breaks.

branches: 1.30.2;
Remove RASTERCONSOLE support from the pmax port.

branches: 1.29.4; 1.29.8;
merge ktrace-lwp.

branches: 1.28.10;
merge kent-audio1 branch, which introduces audio filter pipeline to the MI
audio framework


Summary of changes:

* struct audio_params
- remove sw_code, factor, factor_denom, hw_sample_rate,
hw_encoding ,hw_precision, and hw_channels. Conversion information
is conveyed by stream_filter_list_t.
- change the type of sample_rate: u_long -> u_int
- add `validbits,' which represents the valid data size in
precision bits. It is required in order to distinguish 24/32bit
from 24/24bit or 32/32bit.

* audio_hw_if
- add two parameters to set_params()
stream_filter_list_t *pfil, stream_filter_list *rfil
A HW driver should set filter recipes for requested formats
- constify audio_params parameters of trigger_output() and
trigger_input(). They represent audio formats for the hardware.
- make open() and close() optional
- add int (AUMODE_PLAY or AUMODE_RECORD) and audio_params_t parameters
to round_blocksize()

* sw_code is replaced with stream_filter_t.
stream_filer_t converts audio data in an input buffer and writes
into another output buffer unlike sw_code, which converts data in
single buffer.
converters in dev/auconv.c, dev/mulaw.c, dev/aurateconv.c,
dev/tc/bba.c, dev/ic/msm6258.c, and arch/arm/iomd/vidcaudio.c are
reimplemented as stream_filter_t

* MI audio
- audiosetinfo() builds filter pipelines from stream_filter_list_t
filled by audio_hw_if::set_params()
- audiosetinfo() returns with EINVAL if mmapped and set_params()
requests filters
- audio_write(), audio_pint(), and audio_rint() invoke a filter
pipeline.
- ioctl() for FIONREAD, AUDIO_WSEEK, AUDIO_GETIOFFS,
AUDIO_GETOOFFS, and audio_prinfo::{seek,samples} for
AUDIO_GETINFO handle values for a buffer nearest to userland.

* add `struct device *' parameter to ac97_attach()

* all of audio HW drivers follow audio_hw_if and ac97 changes

branches: 1.27.10; 1.27.14;
Rename the audio "bus" attribute audiobus to avoid confusion with audio
device.

- convert usage of "defopt" to "defflag" where the relevant option does
not support a value (e.g., it's to be used as "options FOO" instead of
"options FOO=xxx"). options that take a value were converted to
defparam recently.
- minor whitespace & formatting cleanups

Move asc_tc and asc_tcds config info to dev/tc/files.tc now that pmax
uses MI SCSI.

Beef up the stic X interface, and tighten a few screws here and there.

branches: 1.23.2;
Switch to MI SCSI and drop old pmax MD SCSI support completely.

branches: 1.22.2; 1.22.4;
Add a definition for PMAGD which should cover all (three?) variations of
it. Left commented out until DECstation switchs to WSCONS.

the tcds cards work in pmaxen. move tcds attachment to files.tc. leave asc
at tcds in files.alpha for now, and add a new `xasc at tcds' to files.pmax.
after pmax has moved fully to MI scsi (and `asc' is MI scsi), we should move
the device asc, etc., lines to files.tc.

Add wscons drivers for the DEC PixelStamp graphics accelerators.

Add TC option card descriptions, which are commented out before NetBSD/pmax
yields local implementations to them.

Add am7930 audio driver.

branches: 1.17.2;
Use bus_dmamap_load() to obtain 128KB chunk for LANCE merging codes from
NetBSD/alpha. Tested ok with DEC3000 and DECstation.

Removed pending write of fully-functional MI driver.

branches: 1.15.4;
Uncomment ioasic_subr.c.

MI ioasic softc and child-device structs, gc duplicate struct definitions.
Add MI ioasic functions, but dont enable on alpha until tested.

adapt to LANCE driver split

Remove "class" declarations, and add "devclass" declarations where
appropriate. Fix several inconsistencies between device class and
attributes. Mostly from Chris Demetriou.

Adjust for changes in config.

Commit `pacifier' driver for turbochannel PMAG-C option card:n
just acknowledge interrupts from the PMAG-C.

branches: 1.9.2;
Declare TCVERBOSE by defopt in files.tc. Include opt_tcverbose.h in tc.c.

branches: 1.8.2;
Create sys/dev/dec and cleanup sys/dev/tc:

* Move clockvar.h (header file for generic clock code) to sys/dev/dec.
* Move if_le_dec.c with DEC padded LANCE-dma (pmax/pmax, ioasic, vax 3400)
to sys/dev/dec. Remove from sys/dev/tc.
* Declare attribute le_dec_subr in /sys/dev/dec/files.dec,
use if_le_dec.c when it's defined.
* Move IOCTL asic declaration from pmax and Alpha MD machine
files to sys/dev/tc/files.tc.
* move TurboChannel and ioasic if_le attachments from pmax and Alpha machine
config files to /sys/dev/tc/files.tc. Add le_dec_subr attribute.
* Add if_le_dec attribute to if_le_ibus (pmax ds3100 pmax) LANCE attachment.

config.new => config

New ARP system, supports IPv4 over any hardware link.

Some of the stuff (e.g., rarpd, bootpd, dhcpd etc., libsa) still will
only support Ethernet. Tcpdump itself should be ok, but libpcap needs
lot of work.

For the detailed change history, look at the commit log entries for
the is-newarp branch.

branches: 1.5.8;
Add the DEFTA FDDI controller.

Make the MI LANCE driver standalone, and use cfattach to resolve
naming conflicts between bus attachments on ports that can have
multiple instances of the LANCE.

Changed struct ifnet to have a pointer to the softc of the underlying
device and a printable "external name" (name + unit number), thus eliminating
if_name and if_unit. Updated interface to (*if_watchdog)() and (*if_reset)()
to take a struct ifnet *, rather than a unit number.

New device attachment scheme:

- split softc size and match/attach out from cfdriver into
a new struct cfattach.

- new "attach" directive for files.*. May specify the name of
the cfattach structure, so that devices may be easily attached
to parents with different autoconfiguration semantics.

tcbus attribute moved to conf/files

files file to define 'tcbus' attribute, to which 'tc's attach.
also defines tc device. does _not_ define le driver, because
of conflicts with other (e.g. ISA) le drivers. (Alpha kernel
configuration files include files.isa and files.tc.)