ata_channel.
- Add and use a CHAN_TO_WDC_REGS() macro to get the wdc_regs from an
ata_channel.
- Add and use a CHAN_TO_PCIIDE() macro to get the pciide_softc from an
ata_channel.
- Add and use a CHAN_TO_PCHAN() macro to get the pciide_channel from an
ata_channel. (This one just hides a cast, and is really just for
consistency with the others.)
This code needs cleanup, at least a reasonable linked list
implementation (fixed a bug in detach_card() in the process which
left a dangling pointer around).
Also removed a questionable and undocumented use of the parent's
device unit number as locator value.
(As with the pcmcia code: someone please review wrt powerup/down etc.)
functions.
For later rescans (eg after a driver LKM was loaded) to make sense,
don't consider it an error if no driver was attached on the initial
bus scan.
Someone who understands the enable/disable/powerup/down stuff please
review this.
loadable drivers and user controlled attach/detach of devices.
An outline was given in
http://mail-index.NetBSD.org/tech-kern/2004/08/11/0000.html
To cite the relevant parts:
-Add a "child detached" and a "rescan" method (both optional)
to the device driver. (This is added to the "cfattach" for now
because this is under the driver writer's control. Logically
it belongs more to the "cfdriver", but this is automatically
generated now.)
The "child detached" is called by the autoconf framework
during config_detach(), after the child's ca_detach()
function was called but before the device data structure
is freed.
The "rescan" is called explicitely, either after a driver LKM
was loaded, or on user request (see the "control device" below).
-Add a field to the device instance where the "locators" (in
terms of the autoconf framework), which describe the actual
location of the device relatively to the parent bus, can be
stored. This can be used by the "child detached" function
for easier bookkeeping (no need to lookup by device instance
pointer). (An idea for the future is to use this for generation
of optimized kernel config files - like DEC's "doconfig".)
-Pass the locators tuple describing a device's location to
various autoconf functions to support the previous. And since
locators do only make sense in relation to an "interface
attribute", pass this as well.
-Add helper functions to add/remove supplemental "cfdata"
arrays. Needed for driver LKMs.
There is some code duplication which will hopefully resolved
when all "submatch"-style functions are changed to accept the
locator argument.
Some more cleanup can take place when config(8) issues more
information about locators, in particular the length and default
values. To be done later.
(E++):
o The static configuration table now identifies by HPC offset.
o Added sq(4) entries for IP12, IP20, and IP24.
o Accomodated HPC revision forcing based on kernel config flags.
adapter) to work on IP24:
o Force HPC and GIO slot endianness.
o Allow slots one and two to be masters and configure for
realtime mode.
Also, while we're here move IP22 invariants into the IP22 case.
I suspect that IP20 will work as well since it exhibited the same
broken DMA that IP24 did before I flipped the master bit.
* Assert RESET before powering off a socket.
* Turn on the output enable bit earlier so the interface actually drives CEn
and RESET.
* Tighten up the power-on timing a bit.
* Mention the specific timing values named in the spec.
For pccbb, be careful to always power off before zeroing PWRCTL.
back after touching the PCI registers.
This shouldn't be necessary, but somehow the controller detects the need for
VPP2=12V and automatically applies it, and gives us a "bad Vcc" error if we
turn it off accidentally.
rather than taking the value from the bios.
Should allow the system to use a serial console that is also a 'bios serial
console' and isn't in the bios serial port table.
Probably fixes (with a few other changes) PR port-i386/9236
