almost once. After we've configured the devices that were present the
first time through, then we know that we're done. If the device has
other devices that are deferred, then it must do a similar dance.
This catches both PC Cards and CardBus cards.
interrupt code to be more robust. I've been running these changes for
over a year... With these changes, I don't see the ath card going
into reset like the code in the tree.
support machines having multiple independently numbered PCI domains
and don't support reenumeration without ambiguity amongst the
devices as seen by the OS and represented by PCI location strings.
This includes introducing a function pci_find_dbsf(9) which works
like pci_find_bsf(9) but additionally takes a domain number argument
and limiting pci_find_bsf(9) to only search devices in domain 0 (the
only domain in single-domain systems). Bge(4) and ofw_pcibus(4) are
changed to use pci_find_dbsf(9) instead of pci_find_bsf(9) in order
to no longer report false positives when searching for siblings and
dupe devices in the same domain respectively.
Along with this change the sole host-PCI bridge driver converted to
actually make use of PCI domain support is uninorth(4), the others
continue to use domain 0 only for now and need to be converted as
appropriate later on.
Note that this means that the format of the location strings as used
by pciconf(8) has been changed and that consumers of <sys/pciio.h>
potentially need to be recompiled.
Suggested by: jhb
Reviewed by: grehan, jhb, marcel
Approved by: re (kensmith), jhb (PCI maintainer hat)
own entry in the softc. This should allow more of cbb_pci_intr() to
migrate to a new cbb_pci_filt() so that we don't have to run cbb's ISR
in almost every case we get an interrupt. We can't just move
cbb_pci_intr into cbb_pci_filt because it does things that aren't safe
to do from a fast interrupt handler, err I mean from a filter. This is
an important first step.
# I wonder if I need to make cardok volatile or not.
o Don't busy wait on powerup. Instead, use the power up interrupt to wait
for the card to power up. Don't wait when we're turning the card off,
since no interrupt happens in that case.
o Convert many of the long DELAYs to tsleeps. We do not run before
the timer have stared, so DELAY isn't necessary. More DELAYs can likely
be eliminated in the future.
o When powering up the card, don't do anything if the card is already
powered up (before we'd power cycle it). This means that for most
cards we power them up once and then never change the power.
o On card eject, mask (by clearing) the CD bit. Before we set it, which
was wrong. We don't want to see any CD events past the first one since
they need to be debounced.
With these changes, I can insert/eject 16bit cards without glitching xmms'
sound output. Something very important to the development of better pccard
drivers :-)
to try to allocate things on my parent can be taken out. It duplicates code.
Also, add comment about why the power state stuff is here (type 2
devices don't participate in the power state save/restore due to
larger Bx issues).
o Register ISR INTR_MPSAFE.
o Loop on KTHREAD_DONE == 0 in the thread.
o Safe the INTR_MPSAFE flag for client drivers (don't know if there are any
CardBus/PCI drivers that are INTR_MPSAFE)
o Read status after acquiring mtx_lock(Giant) rather than before so that we
catch state changes that happen while Giant is being acquired.
o Turn off the CD bit when we see a CD interrupt, and turn it back on after
we've attached/detached the card.
o On suspend, actually set the CBB_SOCKET_MASK to zero rather than oring
in '0' to turn it off on suspend.
o If the ISR that's registerd is MPSAFE, don't acquire Giant around call to
client ISR.
o Fix comments to reflect these changes.
obtained from o2micro. These should only be needed for 'older'
o2micro bridges (anything before the 7xxx series of bridges), but will
work with the new bridges.
# I don't plan on porting it to oldcard, but will happily commit to
# oldcard if someone else needs them.
o Better resume code. Move the comments around. Force the socket state to
be querried. Ack the interrupts properly.
o Intercept the interrupt requests and keep a list of interrupts to service
ourselves. When the card attaches, set its OK bit. When we get a card
status change interrupt for that card, clear the OK bit. Don't call the
ISR if the OK bit is cleared. Iwasaki-san and yamamoto-san have both
sent me patches that fix the same problem this fixes, but at the pccard
level.
o Try to get the signalling of the thread to actually die. This might not be
100% right, but it is less wrong than before.
o Add a SIC next to a TI type that looks like it could be wrong, but isn't.
code to do it when the bios doesn't do it for us, flag it. Then, when
we dealloc, do an equal kludge to get rid of the address. This should
address the can't get IRQ and panic bug in a more graceful way.
# really should write a dealloc routine and just call it instead, since
# this might not fix things in the kldunload case.
o Rename the insanely long PCIC bridge ids.
o Add my copyright to pccbb.c
o Add support for the TI-1510, TI-1520 and TI-4510 series of upcoming
bridges.
o Init MFUNC if it is zero and the TI part has a MFUNC register
at offset 0x8c (1030, 1130 and 1131 don't have anything there, the
1250,1251,1251B and 1450 have a different thing there. The rest
have it. TI is likely to only do MFUNC from now on. The IRQMUX
in the 1250 series of chips needs no tweaks.
o Adjust to new exca interface.
o Add comments about TI chips that I learned in talking to an
engineer at TI.
o Add register definitions for MFUNC.
o Create CB_TI125X chipset type.
handshake between the ISR and the worker thread. Move the mutex lock
so that it only protects the cv_wait. This elimiates the not sleeping
with pccbb1 held messages some people were seeing.
Reviewed by: jhb (at least an early version)
Appologies for making this one bulk commit, but I have tested all these
changes together and don't want to break anything by trying to disentangle
it.
o Make debugging a sysctl/tunable
o Remove flags word from yenta chip info, it is unused
o Make 16-bit card I/O range and 32-bit card I/O range tunables
o Start the rename of pccbb to cbb to match NetBSD by misc renames.
o Kill the now bogus list of softcs to create kthread. Instead, just
create the kthread in the attach routine.
o Remove sc_ from some structure names. It isn't needed.
o Refine chipset lookup code.
o Match generic PCI <-> CardBus bridges. We specifically don't generically
match PCI PCMCIA bridges because they are not, with one exception, yenta
devices.
o Add some comments about the why we need to have a function table ala
OLDCARD
o The PCI interrupt routing by using the ExCA registers is needed for
for all bridges, per the spec, not just TI ones.
o Collapse TOPIC95 and TOPIC95B.
o Using the ToPIC 97 and 100 datasheets, try to support these bridges better,
but more work is needed.
o Generally clarify some XXX comments and add them in a few places where
things didn't look right to me.
o Move interrupt generating register access until after we establish an ISR.
o Add support for YV and XV cards. X and Y are numbers to be determined
later (but maybe never).
o factor powerup code for 16-bit and 32-bit cards.
o When a card supports more than one voltage, prefer the lowest supported
volage. Windows does this, and MS's design guides imply this is the
right thing to do.
o Document race between kthread_exit(0) and kldunload's unmapping of pages
that John Baldwin and I discovered.
o Debounce the CSC interrupt a little better.
o When a 16-bit card is inserted when we don't have a pccard child,
warn about it better. Ditto for 32-bit card.
o Ack ALL the interrupt bits that we get, not just 0x1.
o maybe a couple minor style nits corrected.
Briefly, the significant changes include:
* Way better resource management in pccbb, pccard and cardbus.
* pccard hot-removal now appears to work.
* support pre-fetchable memory in cardbus.
* update cardbus to support new pci bus interface functions.
* Fix CIS reading to no longer use rman_get_virtual().
What's not there, but in the works:
* pccard needs to do interrupt properly and not read the ISR on single
function cards.
* real resource management for pccard
* a complete implementation of CIS parsing
* need to look into how to correctly use mutex in pccbb
This is the first part of a two-part update to NEWCARD. Changes in this
commit are non-functional, and includes the following:
* indentation and other changes to meet style(9).
* other minor style consistancy changes
* addition of comments
* renaming of device_t variables to be consistant across all of NEWCARD.
(note that not all style violations are fixed in this commit -- those that
aren't will be clobbered by the next commit.)
- pccbb no longer needs to remember whether a card is inserted.
- pccbb reissues insertion on load of cardbus/pccard modules.
- got rid of unnecessary delays in power functions.
- Cardbus children are no longer deleted if probe/attach fails.
- non-attached child devices are reprobed at driver_added.
* CARD interface to read CIS
- added card_cis_read/card_cis_free interface to read arbitrary CIS
data. This currently is only implemented in cardbus.
* pccard begins to work
- pccard can now use higher memory space (and uses it by default).
- set_memory_offset interface changed.
- fixed ccr access, which was broken at multiple locations.
- implement an interrupt handler - pccard can now share interrupts.
- resource alloc/release/activate/deactivate functions gutted: some
resources are allocated by the bridge before the child device is
probed or attached. Thus the resource "belongs" to the bridge, and
the pccard_*_resource functions need to fudge the owner/rid.
- changed some error conditions to panics to speed debugging.
* Mutex fix - Giant is entered at the beginning of thread
- Remove redundant header-type-specific support in the cardbus pcibus
clone. The bridges don't need this anymore.
- Use pcib_get_bus instead of the deprecated pci_get_secondarybus.
- Implement read/write ivar support for the pccbb, and teach it how
to report its secondary bus number. Save the subsidiary bus number
as well, although we don't use it yet.
- Make pccbb/cardbus kld loadable and unloadable.
- Make pccbb/cardbus use the power interface from pccard instead of inventing its own.
- some other minor fixes
Files:
dev/cardbus/cardbus.c
dev/cardbus/cardbusreg.h
dev/cardbus/cardbusvar.h
dev/cardbus/cardbus_cis.c
dev/cardbus/cardbus_cis.h
dev/pccbb/pccbb.c
dev/pccbb/pccbbreg.h
dev/pccbb/pccbbvar.h
dev/pccbb/pccbb_if.m
This should support:
- cardbus controllers:
* TI 113X
* TI 12XX
* TI 14XX
* Ricoh 47X
* Ricoh 46X
* ToPIC 95
* ToPIC 97
* ToPIC 100
* Cirrus Logic CLPD683x
- cardbus cards
* 3c575BT
* 3c575CT
* Xircom X3201 (includes IBM, Xircom and, Intel cards)
[ 3com support already in kernel, Xircom will be committed real soon now]
This doesn't work with 16bit pccards under NEWCARD.
Enable in your config by having "device pccbb" and "device cardbus".
(A "device pccard" will attach a pccard bus, but it means you system have
a high chance of panicing when a 16bit card is inserted)
It should be fairly simple to make a driver attach to cardbus under
NEWCARD -- simply add an entry for attaching to cardbus on a new
DRIVER_MODULE and add new device IDs as necessary. You should also make
sure the card can be detached nicely without the interrupt routine doing
something weird, like going into an infinite loop. Usually that should
entail adding an additional check when a pci register or the bus space is
read to check if it equals 0xffffffff.
Any problems, please let me know.
Reviewed by: imp
