freebsd-skq/sys/conf
adrian d4f88869bd Bring over the initial static bluetooth coexistence configuration
for the WB195 combo NIC - an AR9285 w/ an AR3011 USB bluetooth NIC.

The AR3011 is wired up using a 3-wire coexistence scheme to the AR9285.

The code in if_ath_btcoex.c sets up the initial hardware mapping
and coexistence configuration.  There's nothing special about it -
it's static; it doesn't try to configure bluetooth / MAC traffic priorities
or try to figure out what's actually going on.  It's enough to stop basic
bluetooth traffic from causing traffic stalls and diassociation from
the wireless network.

To use this code, you must have the above NIC.  No, it won't work
for the AR9287+AR3012, nor the AR9485, AR9462 or AR955x combo cards.

Then you set a kernel hint before boot or before kldload, where 'X'
is the unit number of your AR9285 NIC:

# kenv hint.ath.X.btcoex_profile=wb195

This will then appear in your boot messages:

[100482] athX: Enabling WB195 BTCOEX

This code is going to evolve pretty quickly (well, depending upon my
spare time) so don't assume the btcoex API is going to stay stable.

In order to use the bluetooth side, you must also load in firmware using
ath3kfw and the binary firmware file (ath3k-1.fw in my case.)

Tested:

* AR9280, no interference
* WB195 - AR9285 + AR3011 combo; STA mode; basic bluetooth inquiries
  were enough to cause traffic stalls and disassociations.  This has
  stopped with the btcoex profile code.

TODO:

* Importantly - the AR9285 needs ASPM disabled if bluetooth coexistence
  is enabled.  No, I don't know why.  It's likely some kind of bug to do
  with the AR3011 sending bluetooth coexistence signals whilst the device
  is asleep.  Since we don't actually sleep the MAC just yet, it shouldn't
  be a problem.  That said, to be totally correct:

  + ASPM should be disabled - upon attach and wakeup
  + The PCIe powersave HAL code should never be called

  Look at what the ath9k driver does for inspiration.

* Add WB197 (AR9287+AR3012) support
* Add support for the AR9485, which is another combo like the AR9285
* The later NICs have a different signaling mechanism between the MAC
  and the bluetooth device; I haven't even begun to experiment with
  making that HAL code work.  But it should be a lot more automatic.

* The hardware can do much more interesting traffic weighting with
  bluetooth and wifi traffic.  None of this is currently used.
  Ideally someone would code up something to watch the bluetooth traffic
  GPIO (via an interrupt) and then watch it go high/low; then figure out
  what the bluetooth traffic is and adjust things appropriately.

* If I get the time I may add in some code to at least track this stuff
  and expose statistics.  But it's up to someone else to experiment with
  the bluetooth coexistence support and add the interesting stuff (like
  "real" detection of bulk, audio, etc bluetooth traffic patterns and
  change wifi parameters appropriately - eg, maximum aggregate length,
  transmit power, using quiet time to control TX duty cycle, etc.)
2013-06-07 09:02:02 +00:00
..
files Bring over the initial static bluetooth coexistence configuration 2013-06-07 09:02:02 +00:00
files.amd64 Add basic support for FDT to i386 & amd64. This change includes: 2013-05-21 03:05:49 +00:00
files.arm Add basic support for FDT to i386 & amd64. This change includes: 2013-05-21 03:05:49 +00:00
files.i386 Add basic support for FDT to i386 & amd64. This change includes: 2013-05-21 03:05:49 +00:00
files.ia64 Hoist the MI compat_freebsd32 files up into files from files.*. 2012-10-25 04:30:48 +00:00
files.mips Add basic support for FDT to i386 & amd64. This change includes: 2013-05-21 03:05:49 +00:00
files.pc98 Disconnect non-MPSAFE SMBFS from the build in preparation for dropping 2012-10-18 12:04:56 +00:00
files.powerpc Add basic support for FDT to i386 & amd64. This change includes: 2013-05-21 03:05:49 +00:00
files.sparc64 Remove all legacy ATA code parts, not used since options ATA_CAM enabled in 2013-04-04 07:12:24 +00:00
kern.mk Spell extensions correctly. 2013-05-20 19:41:34 +00:00
kern.post.mk Remove the links: target. It too is homelessly outdated since it 2012-10-25 04:55:04 +00:00
kern.pre.mk Add the AR9300 HAL into the kernel and module builds. 2013-05-02 07:05:34 +00:00
kmod_syms.awk
kmod.mk Split sdhci driver in two parts: sdhci and sdhci_pci. 2012-10-16 01:10:43 +00:00
ldscript.amd64
ldscript.arm Correctly align the unwind tables. Without this clang may incorrectly align 2013-03-10 00:47:19 +00:00
ldscript.i386
ldscript.ia64
ldscript.mips
ldscript.mips.cfe
ldscript.mips.mips64
ldscript.mips.octeon1
ldscript.powerpc
ldscript.powerpc64 Add the .opd section, this is helps booting a profiled kernel. 2012-01-20 18:52:31 +00:00
ldscript.sparc64
Makefile.amd64 Add basic support for FDT to i386 & amd64. This change includes: 2013-05-21 03:05:49 +00:00
Makefile.arm The -mno-apcs-frame argument is unavaliable on clang, also ignore it there. 2013-03-17 00:56:17 +00:00
Makefile.i386 Add basic support for FDT to i386 & amd64. This change includes: 2013-05-21 03:05:49 +00:00
Makefile.ia64
Makefile.mips Fill out fake preload structure to let userland tools like pmc(3) know 2012-03-15 05:29:51 +00:00
Makefile.pc98 MFi386: r232263 2012-11-10 14:56:35 +00:00
Makefile.powerpc Remove duplication and centralize testing of various config(8)ed features. 2012-09-12 14:19:40 +00:00
Makefile.sparc64
makeLINT.mk Generate a LINT for powerpc and for powerpc64. 2013-04-11 22:18:20 +00:00
makeLINT.sed Match the files directive and all the ways to add or subtract options 2011-10-04 17:11:38 +00:00
newvers.sh print compiler version in the kernel banner 2013-02-02 11:58:35 +00:00
NOTES Finally change the mbuf to have its own fib field instead of stealing 2013-05-16 16:20:17 +00:00
options Driver 'aacraid' added. Supports Adaptec by PMC RAID controller families Series 6, 7, 8 and upcoming products. Older Adaptec RAID controller families are supported by the 'aac' driver. 2013-05-24 09:22:43 +00:00
options.amd64 Rename the IVY_RNG option to RDRAND_RNG. 2012-09-13 10:12:16 +00:00
options.arm Port the new PV entry allocator from amd64/i386/mips to armv6/v7. 2013-05-14 09:47:58 +00:00
options.i386 Rename the IVY_RNG option to RDRAND_RNG. 2012-09-13 10:12:16 +00:00
options.ia64 Port the new PV entry allocator from amd64/i386. This allocator has two 2012-10-26 03:02:39 +00:00
options.mips Add an option for the GE FES based packet engines. Its board IDs 2013-04-23 09:40:42 +00:00
options.pc98
options.powerpc Initial support for running FreeBSD on the Nintendo Wii. We're able to 2012-08-21 06:31:26 +00:00
options.sparc64 - While Netra X1 generally show no ill effects when registering a power 2013-03-02 00:37:31 +00:00
systags.sh
WITHOUT_SOURCELESS Move WITHOUT_SOURCELESS_* files to sys/conf/ in order to avoid "universe" 2012-02-12 14:55:27 +00:00
WITHOUT_SOURCELESS_HOST Fix a typo. 2012-02-12 19:29:34 +00:00
WITHOUT_SOURCELESS_UCODE Move WITHOUT_SOURCELESS_* files to sys/conf/ in order to avoid "universe" 2012-02-12 14:55:27 +00:00