src/sys/dev/uart/uart_cpu_pc98.c, branch releng/8.0

Use bus_space_compare() rather than i386_memio_compare() directly.

2008-09-07T04:47:39+00:00

Add the 2nd CCU and PnP devices support on pc98.

2008-08-25T14:45:24+00:00

Reviewed by:	imp
Obtained from:	//depot/projects/uart with some fixes

Don't expose the uart_ops structure directly, but instead have

2007-04-02T22:00:22+00:00

it obtained through the uart_class structure. This allows us
to declare the uart_class structure as weak and as such allows
us to reference it even when it's not compiled-in.
It also allows is to get the uart_ops structure by name, which
makes it possible to implement the dt tag handling in uart_getenv().
The side-effect of all this is that we're using the uart_class
structure more consistently which means that we now also have
access to the size of the bus space block needed by the hardware
when we map the bus space, eliminating any hardcoding.

Make uart_getenv() not be ns8250 dependent. This will allow, in the future,

2005-12-12T21:00:58+00:00

compilation of kernels without ns8250 support but using the uart framework.
These kernels will be for machines where size matters more, so including code
that can never be executed is undesriable...

Start each of the license/copyright comments with /*-, minor shuffle of lines

2005-01-06T01:43:34+00:00

uart_i8251_ops is gone.

2004-11-21T15:18:35+00:00

Remove the whole uart_cpu_identify() stuff again. Now that it's no longer

2004-11-17T20:01:43+00:00

used on sparc64 they are only stubs on all architectures and it doesn't
look like if we would need it in the near future again.

Ok'ed by:	marcel

- Introduce an uart_cpu_identify() which is implemented in uart_cpu_.c

2004-08-14T23:54:27+00:00

  and that can be used as an identify function for all kinds of busses on a
  certain platform. Expect for sparc64 these are only stubs right now. [1]
- For sparc64, add code to its uart_cpu_identify() for registering the on-
  board ISA UARTs and their resources based on information obtained from
  Open Firmware.
  It would be better if this would be done in the OFW ISA code. However, due
  to the common FreeBSD ISA code and PNP-IDs not always being present in the
  properties of the ISA nodes there seems to be no good way to implement that.
  Therefore special casing UARTs as the sole really relevant ISA devices on
  sparc64 seemed reasonable. [2]

Approved by:	marcel
Discussed with:	marcel [1], tmm [2]
Tested by:	make universe

- Initialize uart_bus_space_io and uart_bus_space_mem.

2004-05-16T14:12:05+00:00

- Fix wrong comment.

Introduce the hw.uart.console and hw.uart.dbgport environment variables

2004-03-20T02:14:02+00:00

to select a serial console and debug port (resp). On ia64 these replace
the use of hints completely and take precedence over hints on alpha,
amd64 and i386. On sparc64 these variables are not yet recognised.

The reasons for introducing these variables are:
1.  Hints have side-effects. They reserve the unit number for use by
    isa or acpi devices and therefore cannot be used to select a pci
    device. Also, the use of a unit number to select a device prior
    to bus enumeration is nonsense. The new variables have no side-
    effects and are not based on unit numbers.
2.  Hints don't have the expression power to allow the sysadmin to
    select UARTs that are not legacy PC devices and need the support
    of compile-time constants to give the sysadmin some level of
    flexibility.

The hw.uart.console and hw.uart.dbgport variables specify a list of
attributes. An attribute is a tag-value pair, seperated by a colon.
Attributes are seperated by a comma. Where possible, tags are the
same as those in /etc/remote (only br and pa in practice). Details
can be found in the manpage (not part of this commit).

Not tested on: amd64, pc98