Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Replace all calls to minor() with dev2unit().

After I removed all the unit2minor()/minor2unit() calls from the kernel
yesterday, I realised calling minor() everywhere is quite confusing.
Character devices now only have the ability to store a unit number, not
a minor number. Remove the confusion by using dev2unit() everywhere.

This commit could also be considered as a bug fix. A lot of drivers call
minor(), while they should actually be calling dev2unit(). In -CURRENT
this isn't a problem, but it turns out we never had any problem reports
related to that issue in the past. I suspect not many people connect
more than 256 pieces of the same hardware.

Reviewed by: kib

- Make rp(4) 64-bit- and endian-clean as well as work on strict alignment
archs. [1]
- Instead of bus_space_{read,write}*(rman_get_bustag(), rman_get_bushandle())
use bus_{read,write}*() for efficiency.

Reported by: Peter Losher [1]
Tested on: i386, sparc64
MFC after: 2 weeks

Fix -Wundef from compiling the amd64 LINT.

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

Use tty layer generic code instead of local copy.

Device names {cua,tty}R%r[.init,.lock] clashes with pty(4) driver
and allows for only 32 ports. This should probably be revisited.

Introduce ttygone() which indicates that the hardware is detached.

Move dtrwait logic to the generic TTY level.

Force the RxBuf and TxBuf arrays to be aligned on 16-bit boundaries to
make the driver work on alpha

approved by: tanimura

- Eliminate rpread(). Call generic ttyread(). (cf rev 1.33)
- Comment out deftermios. Termioschars() will give the default
value.

Pointed out by: bde

1. Update Comtrol RocketPort driver(rp) to version 3.02.
2. Newbusify the driver.
3. Build as a module.

4. Use correct minor numbers when creating device files.
5. Correctly lock control characters.
6. Return ENXIO when device not configured.
Submitted by: Tor Egge <Tor.Egge@fast.no>

7. Fix the baud_table.
Submitted by: Elliot Dierksen <ebd@oau.org>

Note:
- the old driver still lives in src/sys/i386/isa, so that you can
revert to it if something goes wrong.
- The module does not detach very well. Attaching works fine.

Add $FreeBSD$

ISA driver for Comtrol Rocketport serial cards. No PCI probe stub
was submitted to me.
Submitted by: Amir Farah <amir@comtrol.com>