Remove unnecessary include of <sys/malloc.h>.

Split device_t and softc for all attachments of vga(4).

branches: 1.20.24; 1.20.44; 1.20.48;
__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.18.20; 1.18.22;
merge ktrace-lwp.

branches: 1.17.4;
nuke trailing whitespace

branches: 1.16.4; 1.16.6;
Separate the namespace for default (ie unspecified) locators used
by the isa.c bus driver and the "address/whatever not specified"
argument passed to leaf device drivers.
The former is "ISACF_XXX_DEFAULT" as generaterd by config(8), the latter
"ISA_UNKNOWN_XXX", defined in isavar.h.
This way we save a dependency of every ISA device driver on "locators.h".

branches: 1.15.6;
Fix sizeof and whitespace bug from the script I'm using to do the
CFATTACH_DECL conversion. (Grumble.)

Use CFATTACH_DECL().

Declare all cfattach structures const.

ANSIfy.

clean up font handling:
-treat the builtin font like any other font at runtime
-for that, copy it to malloc()'d memory during attach()
-in early console initialization, if we have to consider a broken card
(VGA_CONSOLE_ATI_BROKEN_FONTSEL), copy the builtin font to another
location in font ram; the attach() code will do the rest
put the "quirk" code into effect again

- Work around a hardware bug that loaded fonts don't work, which is
found on many (all?) of PCI-based ATI graphics cards. It is fully optional
and can be enabled by adding `options VGA_CONSOLE_ATI_BROKEN_FONTSEL'
to config file.
- Temporarily remove `quirk' mechanism. Similar code already exists
in pci_quirks.c.

Whitespace KNF.

allow to overwrite the builtin VGA font if necessary,
make the number of available font slots variable,
set up a "quirk" mechanism to tell the generic vga code about crippled
VGA adapters which ignore the "fontsel" TS register,
initiate the quirk table with an ATI chip which happened to be on a board
I tested with.
Afaik quite a number of ATI chips suffers from the "loaded fonts don't
work" problem - these should be added.
Bad side effect of my change: The builtin font will be kicked out
always if a VGA_CONSOLE_SCREENTYPE is specified which needs a loaded
font. In early console initialization, we don't know much about the
graphics card, so we have to assume the worst (ie ATI:-).

branches: 1.7.8;
Overhaul of the ISA autoconfiguration code to support direct
configuration of devices logically attached to the ISA bus:

* Change the isa_attach_args to have arrays of io, mem, irq, drq
resources.
* Add a "pnpnames" and a linked list of "pnpcompatnames" to the
isa_attach_args. If either of these members are non-NULL,
direct configuration of the bus is being performed. Add an
ISA_DIRECT_CONFIG() macro to test for this.
* Drivers are not allowed to modify the isa_attach_args unless
direct configuration is not being performed and the probe fucntion
is returning success.
* Adapt device drivers -- currently, all driver probe routines return
"no match" if ISA_DIRECT_CONFIG() evaluates to true.

add RCSID

Allow bus front-end to provide both ioctl and mmap entry points,
and also the wsdisplay type.

Based on changes from Simon Burge <simonb@wasabisystems.com>.

branches: 1.4.2; 1.4.4; 1.4.6;
Just add the mmap argument to vga_common_attach(), don't bother
with vga_extended_attach().

branches: 1.3.14;
clean up vga_isa_match() - always return "2" on success to make the
driver win over "pcdisplay"

Put definitions and subroutines needed for all PC display adapters
(MGA/GCA and compatibles) into global headers / source files.
Let the VGA driver use them.

ISA frontend for sys/dev/ic/vga.c