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).
secondary bus is 0, we program the primary bus, the secondary bus and
the suborindate bus. This isn't ideal, since we start at parent_bus +
1 and store this in a static.
Ideally, we'd walk the tree and assign bus numbers. However, that's
harder to accomplish without some help from the bus layer which we're
not planning on doing that until 6.
This fixes my CardBus problems on my Sony PCG-Z1WA, and might fix the
Dells that have had problems.
Alignment for pccards should also be treated in a similar way that
we tread it for cardbus cards.
Remove bogus debugs while I'm here.
# This is also necessary to make the CIS reading work.
Submitted by: Carlos Velasco
o O2Micro OZ711e1 is now recognized (note: I don't have one, and the current
owner of the Dell laptop is reporting problems).
o minor nits wrt copyright date.
giant, which implies that we need to take out giant it we're NOT
MPSAFE.
# I can't believe the number of people that looked at this failed to
# detect this.
CB710, CB720, CB1211, CB1225, CB1410 and CB1420
These are likely licensed designed from TI, and the Linux PCMCIA code
treats them as TI chips.
Add comment, but no ID for the 711E1 from O2Micro.
present, and non-zero when it is (or may be) absent. The test
cbb_child_present was backwards. However, typical usage in the tree
would cause it to do the right thing because the card really wasn't
there the OK flag would be turned on.
Also, assume that if any of these bits are turned on we don't have a
card, rather than requiring both of them in the suspend/resume
routines.
Noticed by: cognet
the time the card is inserted and the time that the card is
configured. This can lead to interrupt storms. The O2Micro suggested
workaround is to route the card function interrupt to IRQ1. It
appears from my testing that this is an acceptable workaround for most
chipsets (there's still some issue with the ricoh chipset).
Also, only look at the NOT_A_CARD bit when the bridge tells us there's
a card present. At least one test caused this to be true after the
card was removed, but the author couldn't recreate it with the
workaround in place. The change is more conservative than the
previous code, but still has the work around that wasn't present in
the older code.
the standard.
1) When the bridge tells us that we have a card that isn't recognized, we
use the force register to force the CV_TEST to run. This test causes the
bridge to re-evaluate the card. Once this re-evaluation process happens,
we get a new interrupt that may say it is ready to process. We try this up
to 20 times. Tests have shown that this appears to correctly reset the
'Unknown card type' problem that I saw on my Sony PCG-505TS.
2) Take a page from OLDCARD and always read the CSC register in the ISR.
Some TI (and it seems maybe Ricoh) chipsets require this to behave
properly. This work around appears to work due to some power management
protocols that were improperly implemented. Maybe it can be removed when
this driver supports the full PME# protocol described in the standards.
3) Minor additional debug printf when debugging is enabled.
4) Minor additional commentary for things that are obvious only after study.
# I'm committing this from my Sony PCG-505TS using shared PCI interrupts
# and NEWCARD, but there are some issues with the Ricoh bridge still, but
# at least now I can boot with the card inserted and have it work.
However, they are presently necessary due to bigger bogusness in the
pci bus layer not doing the right thing on suspend/resume or on
initial device probe. This is exactly the sort of thing that the
BURN_BRIDGES option was invented for. Mark all of them as
BURN_BRIDGES. As soon as I have the powerstate stuff properly
integrated into the pci bus code, I intend to remove all these
workarounds.
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 Only complain about detached children that aren't pccard/cardbus.
o Don't NULL out the pccarddev and cbdev devices. detach just
disassociates the device and driver. It doesn't delete the child.
o on driver added, just probe_and_attach the children. If there's
any children attached, wakeup the device add/delete thread.
o wakeup the add/delete thread with the correct cv_signal() rather
than the bogus wakeup(sc). It used to be that we did a tsleep on
sc in this thread, but switched to the more reliable cv stuff a while
ago w/o changing this.
o Remove bogus checks when reallocating memory for the registers. They
weren't needed and turned out to be completely bogus.
This lets me load/unload pccard with a pccard in a slot and have the
child correctly detach/attach. This should help people that have wi
in their kernel, but that kldload cbb and pccard, for example.
we can have additional different types of bridges.
o remove now bogus comment.
o Don't clear CARD_OK when we can't attach a card.
o minor style nits
# this make kldload of cardbus drivers work for me when the card is
# present on boot.
