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History log of /src/sys/dev/isa/sbdsp.c
RevisionDateAuthorComments
 1.142  24-Jul-2021  andvar Fix all remaining typos, mainly in comments but also in few definitions and log messages, reported by me in PR kern/54889.
Also fixed some additional typos in comments, found on review of same files or typos.
 1.141  08-Jun-2019  isaki branches: 1.141.14;
Clean get_props().
- Make get_props() return AUDIO_PROP_{PLAYBACK,CAPTURE} properly.
This eliminates need for audio.c to take care of such (old)
drivers which don't return both of PLAYBACK and CAPTURE.
- All get_props() doesn't need to return AUDIO_PROP_MMAP.
It is handled in the audio layer now.
 1.140  08-May-2019  isaki 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
 1.139  03-Feb-2019  mrg branches: 1.139.2;
- add or adjust /* FALLTHROUGH */ where appropriate
- add __unreachable() after functions that can return but won't in
this case, and thus can't be marked __dead easily
 1.138  03-Sep-2018  riastradh Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)
 1.137  04-Nov-2017  nat branches: 1.137.2; 1.137.4;
Add AUDIO_ENCODING_SLINEAR to supported encodings. This allows sb, sbpro
& sb16 to configure with 8-bit precision.

Tested in games/mame with a 486DX emulation.
 1.136  11-Jul-2016  msaitoh branches: 1.136.10;
KNF. No functional change.
 1.135  23-Nov-2011  jmcneill branches: 1.135.8; 1.135.26;
Merge jmcneill-audiomp3 branch, which is derived from ad-audiomp2. From
the original ad-audiomp branch notes:

Add MP locking to the audio drivers.

Making the audio drivers MP safe is necessary before efforts
can be made to make the VM system MP safe.

The are two locks per device instance, an ISR lock and
a character device lock. The ISR lock replaces calls to
splaudio()/splx(), and will be held across calls to device
methods which were called at splaudio() before (e.g.
trigger_output). The character device lock is held across
calls to nearly all of the methods, excluding some only
used for initialization, e.g. get_locks.

Welcome to 5.99.57.
 1.134  24-Feb-2010  dyoung branches: 1.134.10; 1.134.12;
A pointer typedef entails trading too much flexibility to declare const
and non-const types, and the kernel uses both const and non-const
PMF qualifiers and device suspensors, so change the pmf_qual_t and
device_suspensor_t typedefs from "pointers to const" to non-pointer,
non-const types.
 1.133  08-Jan-2010  dyoung branches: 1.133.2;
Expand PMF_FN_* macros.
 1.132  01-Sep-2009  jmcneill aprint-ify
 1.131  28-Apr-2008  martin branches: 1.131.12;
Remove clause 3 and 4 from TNF licenses
 1.130  11-Apr-2008  cegger branches: 1.130.2; 1.130.4;
convert to pmf(9)
ok jmcneill
 1.129  01-Apr-2008  xtraeme Fix fallout from device_t/softc split to mpu(4):
always pass the mpu_softc to mpu_intr(). Found by Takeshi Nakayama.
 1.128  15-Mar-2008  cube Split device_t and softc for sb(4) and all its attachments.
 1.127  19-Oct-2007  ad branches: 1.127.12; 1.127.16;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h
 1.126  16-Nov-2006  christos branches: 1.126.6; 1.126.8; 1.126.22; 1.126.24; 1.126.28;
__unused removal on arguments; approved by core.
 1.125  12-Oct-2006  christos - sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386
 1.124  24-Sep-2006  jmcneill Add "name" parameter to powerhook_establish, to aid debugging. No objections
on tech-kern@
 1.123  03-Sep-2006  christos branches: 1.123.2; 1.123.4;
add missing initializers
 1.122  14-May-2006  elad integrate kauth.
 1.121  13-Apr-2006  christos Coverity CID 1320: Don't try to use drq16 as an index in an array if it is -1
 1.120  29-Mar-2006  thorpej Use device_cfdata().
 1.119  08-Mar-2006  lukem branches: 1.119.2;
Use the SI capitalization for "Hz", "kHz", and "MHz" in comments and strings.
Add a space between numbers and Hz unit.
 1.118  11-Dec-2005  christos branches: 1.118.4; 1.118.6; 1.118.8; 1.118.10;
merge ktrace-lwp.
 1.117  27-Feb-2005  perry branches: 1.117.4;
nuke trailing whitespace
 1.116  01-Feb-2005  gson Update printf format in debug printf to account for sample_rate now
being an unsigned int.
 1.115  13-Jan-2005  kent branches: 1.115.2; 1.115.4;
ansify and KNF
 1.114  10-Jan-2005  kent 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
 1.113  09-Jul-2004  mycroft branches: 1.113.2;
Remove junk code.
 1.112  09-May-2003  fvdl branches: 1.112.2;
A few ISA sound drivers like to share dma channels, and hence deferred
isa_dmamap_create() calls to their open/close entrypoints. This worked
with some luck, but broke on i386 when _bus_dmamap_create started
to allocate bounce buffers upfront, since memory below 16M may well
not be available when the sound devices is opened for the Nth time.

To fix this, create a new simple interface, isa_drq_alloc/isa_drq_free,
wrappers around already existing bitmask macros. These are expected
to be used before an isa_dmamap_create call, and after an
isa_dmamap_destroy call, respectively. For the sb and ad1848 drivers,
they're deferred until open/close.

All isa_dmamap_create calls can now use BUS_DMA_ALLOCNOW and be done
at attach time.
 1.111  03-May-2003  wiz DMA, not dma nor Dma.
 1.110  01-Feb-2003  thorpej Add extensible malloc types, adapted from FreeBSD. This turns
malloc types into a structure, a pointer to which is passed around,
instead of an int constant. Allow the limit to be adjusted when the
malloc type is defined, or with a function call, as suggested by
Jonathan Stone.
 1.109  06-Jan-2002  augustss Increase max sampling rate on SB16. It seems almost all models supports it.
 1.108  13-Nov-2001  lukem add RCSID
 1.107  22-Feb-2001  minoura branches: 1.107.2; 1.107.4;
Reset the mixer when resume from suspend.
This is required on some laptops with a buggy APM BIOS.
Code from Inoue Yoshinari <pf5y-inue@asahi-net.or.jp>.
 1.106  28-Jun-2000  mrg remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>
 1.105  26-Jun-2000  simonb Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.
 1.104  07-Feb-2000  thorpej branches: 1.104.4;
Add a new function call to the ISA DMA API: isa_dmamaxsize(), which returns
the maximum transfer size for the specified DMA channel. Make all clients
of ISA DMA use this call to determine their maximum transfer size.
 1.103  20-Jan-2000  thorpej Simplify sbdsp_pause().
 1.102  01-Nov-1999  augustss Make little endian and big endian version of all functions
that deal with 16 bit samples. Let the drivers decide which ones
to use.
 1.101  10-Oct-1999  mycroft branches: 1.101.2; 1.101.4;
Fix one more #ifdef, and now it actually compiles again. *sigh*
 1.100  04-Aug-1999  augustss branches: 1.100.2;
Use NMPU not NMIDI around call to mpu_intr.
 1.99  02-Aug-1999  augustss Move the mpu device declaration to conf/files.
Let the mpu device attach at the sb device, and then midi at the mpu.
Update the mpu at eso attachment.
 1.98  22-Mar-1999  mycroft branches: 1.98.4;
Make sure we clean up any DMA maps if the open fails.
 1.97  22-Mar-1999  mycroft Several things:
* Rearrange the speed mapping table and adjust the code so that the highest
rate can actually be used. Previously we ended up rounding up slightly
lower speeds and then losing because set_params couldn't set the mode
back to the current one.
* Allow 260 as a valid I/O address, since the SB1 can be jumpered to this.
* Change the MPU-401 code so it can be attached as a separate device.
(XXX Really, the SB code ought to just attach a subdevice itself.)
* Do not attach an OPL on the SB1. Writing to the OPL registers at
SB_base+0 on this card wedges my machine.
(XXX Should we access it at 388 instead? The Creative web site claims
that this board *does* have an OPL2, but I haven't played with this
extensively.)
* Allocate the SB DMA channels at open time, rather than attach time, so
that a single DRQ can be used for multiple cards (if only one is in use
at a given time).
(XXX Let me tell you why this is a horrible hack. If the ISA DMA code
tries to allocate a bounce buffer after boot time, it will generally fail,
because there is no contiguous memory below 16MB and the code to allocate
contiguous pages doesn't know how to move things around. Now, we
shouldn't ever be using bounce buffers here, because we use
isa_dmamem_alloc(). So we just turn off BUS_DMA_ALLOCNOW and we don't
actually try to. That's cool, and it even works, but isa_dmamem_alloc()
has the same problem. It just happens that we allocate the ring buffers
at boot time, and whenever we reallocate them (due to the buffer size
changing), we just deallocated the previous (contiguous) buffer, so we get
lucky. This is absolutely disgusting and needs to be fixed.)
 1.96  22-Feb-1999  mycroft Use DMAMODE_LOOPDEMAND. Tested on a ViBRA16.
 1.95  18-Feb-1999  mycroft spaces -> tabs
 1.94  18-Feb-1999  mycroft Remove some superfluous softc elements.
 1.93  18-Feb-1999  mycroft Add separate halt_output and halt_input routines.
 1.92  17-Feb-1999  mycroft Fix slight ommission in previous.
 1.91  17-Feb-1999  mycroft Pass the direction to the allocm and round_buffersize methods.
Some drivers need this to properly allocate DMAable memory.
 1.90  17-Feb-1999  mycroft If we have an 8-bit DRQ, always pass that to isa_malloc().
 1.89  08-Jan-1999  augustss Avoid arithmetic on `void *' since that's not ANSI C.
 1.88  17-Aug-1998  augustss * Redo the way the way the MIDI driver attaches to audio devices.
* Improve the midisyn layer a little.
* Add a driver for the Yamaha OPL[23] FM synths.
The opl driver is not finished yet; it sounds pretty awful.

For some strange reason I cannot get any FM sound from my SB64 cards,
but a regular SB16 works fine.
 1.87  10-Aug-1998  augustss Fix typo.
 1.86  10-Aug-1998  mycroft Minor change.
 1.85  10-Aug-1998  mycroft Slow down, Wilbur.
 1.84  10-Aug-1998  mycroft Fix a typo I introduced in the MIDI code.
 1.83  10-Aug-1998  mycroft For models prior to the SB16, there is only one clock divider, so couple the
sample rates. However, only do this if both play and record are being used
simultaneously; otherwise we can't play 22KHz on the SB1.
 1.82  10-Aug-1998  mycroft Use the new trigger_{in,out}put interface.
Also, even on the SB1, we can leave the DMA controller in auto-initalize
mode and just send a command to the board for each block. This may help
prevent FIFO underruns.
 1.81  07-Aug-1998  augustss Add MIDI support. The MIDI devices can be accessed as ``raw'' through
the /dev/rmidiN devices, or with a sequencer interface via /dev/music.
So far the only supported MIDI device is the MPU401 port on SoundBlaster
(and only on SB on isapnp, since we do not have locators with multiple
values yet).
 1.80  09-Jun-1998  thorpej Adjust for changes to the ISA DMA API.
 1.79  04-Mar-1998  augustss Use lower case "agc" for consistency.
 1.78  30-Jan-1998  bouyer Fix for the vibra16x from Lennart Augusts: saying that the dsp4.16 was
a SB64 was just a guess. The vibra16x is really a sb16.
 1.77  02-Dec-1997  mycroft Set the gain to 1/2 by default; 3/4 is too loud and can damage headphones and
speakers.
 1.76  19-Oct-1997  augustss branches: 1.76.2;
Make the audio API (almost) SunOS compatible.
The changes is to allow some limited mixer manipulation through
the audio device (instead of the mixer device).
This rendered 4 methods in audio_hw_if unused so garbage collect these.
 1.75  16-Oct-1997  augustss Make sure the 'input' class is used even for the 1345 mixer.
 1.74  11-Oct-1997  mycroft AudioElinear -> AudioEslinear
 1.73  11-Oct-1997  mycroft AudioC[A-Z] -> AudioC[a-z]
 1.72  06-Oct-1997  augustss Keep filter when setting source on SB Pro.
Close PR 2593.
 1.71  09-Sep-1997  augustss Change the way we determine what interrupt routine to use to make
it work when drq8 == drq16.
 1.70  29-Aug-1997  augustss Substantial rewrite of the SB driver to make it do full duplex on an SB16.
Because of the braindead design of the SB the input and output have to
use different precisions (8 and 16 bits). It is possible to set the driver
to use 8 bits on both and it will the emulate 8 bits on the output by
expanding it to 16 bits.
 1.69  24-Aug-1997  augustss Add mute and channels swap to the mixer capabilites.
 1.68  24-Aug-1997  augustss - Change audio_hw_if a little: set_param now sets the play and record modes
at the same time instead by using two different calls. This enables
it to check more easily if the combined mode is all right.
- Improve the error checking in audio.c.
- Add a new audio property, AUDIO_PROP_INDEPENDENT, show if the
play and record settings are independent.
- Fix some buglets in audio.c.
 1.67  19-Aug-1997  augustss Avoid munging audio_defaults.
 1.66  11-Aug-1997  augustss Round mixer values correctly when setting them.
This is important for the OSS emulation since OSS
uses a different range of values for the mixer.
 1.65  04-Aug-1997  augustss Audio:
* Make it possible to use software assisted encodings that expand the
sample size.
* Use 16 bits per sample when emulating mulaw coding on the SB.
* Prepare for SB16 without CT1745 mixer.
 1.64  31-Jul-1997  augustss Audio changes:
- Change the way attach and open works to allow multiple audio
devices.
- Split the mulaw.c file into two to avoid dragging in mulaw
convertsion when they are not needed. Add 16 bit alaw/mulaw tables.
- Change the way audio properties are gotten.
- Recognize more versions os SoundBlaster.
 1.63  28-Jul-1997  augustss branches: 1.63.2;
Audio: Remove the machine dependant code I put in audio.c by mistake.
This adds another method to audio_hw_if. Also remove a field from
audio_hw_if that was not read-only.
 1.62  28-Jul-1997  augustss audio: Minor cleanup and enable looping DMA for PSS and PAS.
 1.61  27-Jul-1997  augustss audio: Simplify handling of AUDIO_SETFD and committing of encoding mode.
 1.60  27-Jul-1997  augustss Changes to the sudio system:
- It is now possible to handle devices that want "looping" DMA,
e.g. the SoundBlaster correctly. The WSS and SB drivers use this.
To do this several new methods were introduced in audio_hw_if.
- Different silence handling (forced by previous change).
- The audio driver can now be mmap()-ed, but due to problems in
the VM system only for writing for now.
- The OSS (Linux) audio emulation takes advantage of some of the
new features.
 1.59  15-Jul-1997  augustss In the name of backwards compatibility AUDIO_ENCODING_LINEAR has been
renamed AUDIO_ENCODING_SLINEAR and AUDIO_ENCODING_LINEAR reverts to the
NetBSD 1.2 sematics. A kernel with COMPAT_12 defined will accept
AUDIO_ENCODING_LINEAR and treat it as before, without COMPAT_12 it
will be rejected.
 1.58  13-Jun-1997  augustss Fix a braino in record source selection and a pasto in detecting
16 bit mode recording.
 1.57  06-Jun-1997  thorpej Pull thorpej-bus-dma branch into mainline.
 1.56  29-May-1997  jtk make Jazz16 16-bit output work properly again. Still hangs somewhere
(not yet diagnosed) on occasion in high-speed mode, but a ^C will exit
immediately--no 30-second drainage timeout.
 1.55  28-May-1997  augustss Add Alaw encoding emulation.
 1.54  27-May-1997  augustss A cosmetic name change.
 1.53  26-May-1997  mycroft Minor corrections to previous. Notably, make recording work on SBPro again.
 1.52  23-May-1997  augustss Redo the way selecting the mode for SB cards is done completely.
It is now table driven since there are so many different variations
of SB cards out there.
Also fix a bug that stopped SB2 and SBPro from working.
 1.51  20-May-1997  augustss Make the audio default parameters into a globally accessible constant.
 1.50  19-May-1997  augustss Redo the SB mixer code. The driver can now distinguish between the
four different mixer options: none, CT1335, CT1345, and CT1745.
It should now be possible to access most of the SB16 functionality.
 1.49  18-May-1997  augustss Mask the level registers as the documentation suggests.
 1.48  17-May-1997  augustss Change lowater calculation a little.
Fix mixer setting bug and add some missing splaudio().
Set SB drq16 to 5 and don't pretend to be SB v1.0.
 1.47  16-May-1997  augustss Back to pretending to be a SB v1.0 again, the mixer code for higher
versions is buggy.
 1.46  13-May-1997  augustss Clean up emulation code, SB, and GUS drivers and add some more encoding
emulation to SB.
 1.45  09-May-1997  augustss branches: 1.45.2;
Change the interface between high and lowlevel audio drivers again:
Set the encoding parameters slightly differently.
Remove the SW encoding/decodinf functions from this interface
and move them to the audio_parameter struct; this is both more efficient
and flexible.
 1.44  07-May-1997  augustss Convert to new orthogonal audio encoding scheme and implement
some of the new encodings. The change to ioctl AUDIO_GETENC is
NOT backwards compatible.
 1.43  07-May-1997  mikel update sb_printsc() to match current reality.
 1.42  30-Apr-1997  augustss XXX Pretend that all SB cards are of model 1.
XXX This way you can at least use SB cards until the real fixes go in.
 1.41  29-Apr-1997  augustss Change the interface between the high and low level audio drivers
so that all audio encoding parameters are set at once. This simplifies
the interface and make error checking easier.
 1.40  29-Mar-1997  jtk partial fix for PR 3385: correctly identify JAZZ-16 when AUDIO_DEBUG is
enabled
 1.39  20-Mar-1997  mycroft Use autoinitialize DMA mode on the SB2 and later. Partly from Torsten Duwe.
 1.38  20-Mar-1997  mycroft Make sure we round the block size to a multiple of the sample size.
 1.37  20-Mar-1997  mycroft Remove bogus block rounding code. If the application sets a
block size explicitly, it had better know what it's doing. From
PR 2587, by Robert Baron.
 1.36  20-Mar-1997  mycroft Turn off a debugging printf().
 1.35  20-Mar-1997  mycroft Add 16-bit DRQ support on PnP, and enable 16-bit output.
 1.34  20-Mar-1997  mycroft Combine set_encoding and set_precision into a single set_format interface.
 1.33  13-Mar-1997  mycroft Don't share the silence block between devices. Make silence filling work for
more encodings, and make it device-independent. From Lennart Augustsson, in
PR kern/3305.
 1.32  03-Mar-1997  christos Fix bug introduced in the conversion to bus_*(). Don't always say that
we are a JASS16. From enami tsugutomo.
 1.31  16-Jan-1997  christos branches: 1.31.2;
- convert to bus_space_*
- split attachment code to sb_isa.c
 1.30  25-Oct-1996  fvdl branches: 1.30.2;
Move 'not finished' printf within AUDIO_DEBUG ifdefs, it should normally
be silent about this and caused confusion with stray interrupts.
 1.29  16-Oct-1996  jtk fix PR 2851: make it compile under -Wformat
 1.28  13-Oct-1996  christos backout kprintf changes
 1.27  10-Oct-1996  christos printf -> kprintf, sprintf -> ksprintf
 1.26  12-May-1996  mycroft Use intr.h.
 1.25  29-Apr-1996  christos - prototype fixes
 1.24  16-Mar-1996  jtk add MediaVision Jazz16 chipset support. It must be configured with
'flags 1' on the sb? kernel configuration file line (because it frobs a
noncontiguous IO port to configure the Jazz16 extensions).

Also, remove static sb_device structure and fill in user's buffer on
each request.
 1.23  01-Mar-1996  mycroft Add support to the ISA DMA framework for auto-initialize mode.
Add experimental SB16 code, disabled for now.
 1.22  20-Feb-1996  mycroft Do not allow the gain to be changed on an original SoundBlaster.
 1.21  20-Feb-1996  mycroft Fix mono volume adjustment.
 1.20  20-Feb-1996  mycroft XXX This is a kluge.
Check to see if the DMA transfer is finished; if not, don't do interrupt
processing.
 1.19  18-Feb-1996  mycroft Declare a variable...
 1.18  18-Feb-1996  mycroft Clean this up a bit.
 1.17  18-Feb-1996  jtk Add bass/treble input filter adjustment controls to SB (Pro) driver
 1.16  16-Feb-1996  mycroft Various:
* Snap the sample rate when setting it, and remember only the time constant.
* Set the time constant when changing between play/record.
* Always return the actual sample rate with AUDIO_GETINFO.
 1.15  16-Feb-1996  mycroft Various, including:
* Add more delays while writing registers.
* Replace sc_dma{in,out}_inprogress with sc_dmadir.
* Eliminate the need for sc_locked.
* Add more DPRINTF()s.
 1.14  10-Nov-1995  mycroft Convert IRQ, DRQ, and port numbers to int.
 1.13  19-Jul-1995  brezak GUS audio driver from John Kohl.
 1.12  07-Jul-1995  brezak Cleanup
 1.11  08-May-1995  brezak Remove strings
 1.10  08-May-1995  brezak Fix holes in device index space. PR#1028
 1.9  26-Apr-1995  brezak Fix nits from Mike Long <mike.long@analog.com> PR#996
 1.8  17-Apr-1995  mycroft Fix obvious bug in reading from SB_MIC_PORT.
 1.7  17-Apr-1995  cgd update for new locations
 1.6  17-Apr-1995  cgd clean up several ISA device interfaces: autoconfiguration, header
inclusion, and interrupt configuration. more work still needs to be done,
but it's getting better...
 1.5  25-Mar-1995  mycroft Use void* rather than caddr_t in many places.
 1.4  14-Mar-1995  brezak Fixes defect port-i386/860 from John Woods (jfw@jfwhome.funhouse.com) with
supplied patch. Kernel will not link with only ProAudio Spectrum driver
specified.
 1.3  13-Mar-1995  brezak Fix SB8 playback. From David Gluss <david@pure.com>
 1.2  08-Mar-1995  brezak Cleanup for SB16 (From Jan Sparud)
 1.1  21-Feb-1995  brezak SoundBlaster driver for SB, SB16 and SBPRO
 1.30.2.1  18-Jan-1997  thorpej Update from trunk.
 1.31.2.1  12-Mar-1997  is Merge in changes from The Trunk
 1.45.2.4  01-Jun-1997  thorpej Update from trunk.
 1.45.2.3  24-May-1997  thorpej Update from trunk.
 1.45.2.2  19-May-1997  thorpej Update from trunk.
 1.45.2.1  13-May-1997  thorpej Adapt to new software interface to the on-board ISA DMA controller.
 1.63.2.5  14-Oct-1997  thorpej Update marc-pcmcia branch from trunk.
 1.63.2.4  16-Sep-1997  thorpej Update marc-pcmcia branch from trunk.
 1.63.2.3  01-Sep-1997  thorpej Update marc-pcmcia branch from trunk.
 1.63.2.2  27-Aug-1997  thorpej Update marc-pcmcia branch from trunk.
 1.63.2.1  23-Aug-1997  thorpej Update marc-pcmcia branch from trunk.
 1.76.2.2  07-Feb-1998  mellon Pull up 1.78 (manuel)
 1.76.2.1  09-Dec-1997  thorpej Sync w/ trunk (mycroft)
 1.98.4.1  02-Aug-1999  thorpej Update from trunk.
 1.100.2.1  27-Dec-1999  wrstuden Pull up to last week's -current.
 1.101.4.1  15-Nov-1999  fvdl Sync with -current
 1.101.2.2  12-Mar-2001  bouyer Sync with HEAD.
 1.101.2.1  20-Nov-2000  bouyer Update thorpej_scsipi to -current as of a month ago
A i386 GENERIC kernel compiles without the siop, ahc and bha drivers
(will be updated later). i386 IDE/ATAPI and ncr work, as well as
sparc/esp_sbus. alpha should work as well (untested yet).
siop, ahc and bha will be updated once I've updated the branch to current
-current, as well as machine-dependant code.
 1.104.4.1  30-Jun-2000  simonb Pull up mmap paddr_t/off_t changes from trunk.
 1.107.4.1  10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.107.2.3  28-Feb-2002  nathanw Catch up to -current.
 1.107.2.2  11-Jan-2002  nathanw More catchup.
 1.107.2.1  14-Nov-2001  nathanw Catch up to -current.
 1.112.2.6  04-Mar-2005  skrll Sync with HEAD.

Hi Perry!
 1.112.2.5  04-Feb-2005  skrll Sync with HEAD.
 1.112.2.4  17-Jan-2005  skrll Sync with HEAD.
 1.112.2.3  21-Sep-2004  skrll Fix the sync with head I botched.
 1.112.2.2  18-Sep-2004  skrll Sync with HEAD.
 1.112.2.1  03-Aug-2004  skrll Sync with HEAD
 1.113.2.3  09-Jan-2005  kent audio_hw_if change
* make open() and close() optional
* add int (AUMODE_PLAY or AUMODE_RECORD) and audio_params_t parameters
to round_blocksize()
 1.113.2.2  03-Jan-2005  kent * remove stream_filter_list_append and stream_filter_list_prepend
* add stream_filter_list_t::{append(), prepend(), set()}
 1.113.2.1  03-Jan-2005  kent * adopt the filter pipeline framework

* ic/ad1848.c, isa/ess.c, isa/sbdsp.c
remove direct call of set_params() for the default encoding.
It should be called by the MI audio framework.
 1.115.4.2  19-Mar-2005  yamt sync with head. xen and whitespace. xen part is not finished.
 1.115.4.1  12-Feb-2005  yamt sync with head.
 1.115.2.1  29-Apr-2005  kent sync with -current
 1.117.4.4  17-Mar-2008  yamt sync with head.
 1.117.4.3  27-Oct-2007  yamt sync with head.
 1.117.4.2  30-Dec-2006  yamt sync with head.
 1.117.4.1  21-Jun-2006  yamt sync with head.
 1.118.10.1  19-Apr-2006  elad sync with head.
 1.118.8.4  03-Sep-2006  yamt sync with head.
 1.118.8.3  24-May-2006  yamt sync with head.
 1.118.8.2  01-Apr-2006  yamt sync with head.
 1.118.8.1  13-Mar-2006  yamt sync with head.
 1.118.6.1  22-Apr-2006  simonb Sync with head.
 1.118.4.1  09-Sep-2006  rpaulo sync with head
 1.119.2.2  24-May-2006  tron Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.
 1.119.2.1  31-Mar-2006  tron Merge 2006-03-31 NetBSD-current into the "peter-altq" branch.
 1.123.4.2  10-Dec-2006  yamt sync with head.
 1.123.4.1  22-Oct-2006  yamt sync with head
 1.123.2.1  18-Nov-2006  ad Sync with head.
 1.126.28.1  25-Oct-2007  bouyer Sync with HEAD.
 1.126.24.2  23-Mar-2008  matt sync with HEAD
 1.126.24.1  06-Nov-2007  matt sync with HEAD
 1.126.22.1  26-Oct-2007  joerg Sync with HEAD.

Follow the merge of pmap.c on i386 and amd64 and move
pmap_init_tmp_pgtbl into arch/x86/x86/pmap.c. Modify the ACPI wakeup
code to restore CR4 before jumping back into kernel space as the large
page option might cover that.
 1.126.8.1  23-Oct-2007  ad Sync with head.
 1.126.6.1  27-Feb-2007  ad Add MP locking for audio drivers.
 1.127.16.2  02-Jun-2008  mjf Sync with HEAD.
 1.127.16.1  03-Apr-2008  mjf Sync with HEAD.
 1.127.12.1  24-Mar-2008  keiichi sync with head.
 1.130.4.3  11-Mar-2010  yamt sync with head
 1.130.4.2  16-Sep-2009  yamt sync with head
 1.130.4.1  16-May-2008  yamt sync with head.
 1.130.2.1  18-May-2008  yamt sync with head.
 1.131.12.3  11-Dec-2008  ad Checkpoint work in progress.
 1.131.12.2  09-Dec-2008  ad Checkpoint work on MIDI.
 1.131.12.1  08-Dec-2008  ad Convert some more drivers.
 1.133.2.1  30-Apr-2010  uebayasi Sync with HEAD.
 1.134.12.3  20-Nov-2011  jmcneill improve the last change, after discussing it with rmind
 1.134.12.2  20-Nov-2011  jmcneill don't kpause with intr_lock held
 1.134.12.1  19-Nov-2011  jmcneill port ad-audiomp2 branch changes to 5.99.56
todo:
- port ad-audiomp2 pcppi changes
- these drivers need to be fixed:
- emuxki
- gcscaudio
- hdafg
- uaudio
- umidi
- MD audio drivers
 1.134.10.1  17-Apr-2012  yamt sync with head
 1.135.26.1  05-Oct-2016  skrll Sync with HEAD
 1.135.8.1  03-Dec-2017  jdolecek update from HEAD
 1.136.10.1  16-Apr-2018  martin Pull up following revision(s) (requested by nat in ticket #761):

sys/dev/isa/sbdsp.c: revision 1.137

Add AUDIO_ENCODING_SLINEAR to supported encodings. This allows sb, sbpro
& sb16 to configure with 8-bit precision.

Tested in games/mame with a 486DX emulation.
 1.137.4.1  10-Jun-2019  christos Sync with HEAD
 1.137.2.1  06-Sep-2018  pgoyette Sync with HEAD

Resolve a couple of conflicts (result of the uimin/uimax changes)
 1.139.2.4  05-May-2019  isaki Fix typos (made in this branch).
 1.139.2.3  04-May-2019  isaki Move dev/audio_if.h -> dev/audio/audio_if.h
 1.139.2.2  03-May-2019  isaki Adapt sbdsp to audio2.
- Use new query_format/set_format interfaces.
The formats are created from sb[pr]modes tables.
- Drop INDEPENDENT property for models proir to SB_16.
 1.139.2.1  21-Apr-2019  isaki Not yet fully adapted to audio2 but make it compilable.
- Drop FULLDUPLEX property. It is done in a tricky way.
 1.141.14.1  01-Aug-2021  thorpej Sync with HEAD.

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