Commit Graph

19 Commits

Author SHA1 Message Date
mycroft 9b9cce6084 Mostly cosmetic and performance changes:
* Make the ring buffer size and water marks patchable, and allocate the buffer
  separately.
* Do the ttymalloc() at attach time.
* Reorganize the receive buffer so the status and data pair are next to each
  other.  This is slightly faster.
* Make sure we actually do turn off interrupts in comclose() if we have DDB
  configured and it's not the console.  (D'oh!!!!)
* When we exhaust the current transmit run, turn off transmit interrupts in
  comintr(), so we're fairly sure we don't get another one.
* Nuke the silly lsrmap[] idea; it's slower in the normal case.
* Cache the l_rint pointer in the soft interrupt routine.
1997-11-03 06:55:54 +00:00
fvdl 961e39030d Add 16650 hardware flowcontrol support. Basically PR 3844 from
Dave Huang <khym@bga.com>, with added check for broken early versions
of the 16650, taken from the Linux driver.

This should be extended to use, for example, higher trigger levels for
the bigger 16650 FIFO, and its capability for using a smaller divisor
and thus higher speeds. But this patch is very useful for 16650 users
already.
1997-10-19 14:26:16 +00:00
explorer ebf03fd00c Add hooks for entropy collection. Right now, you must place
options RND_COM
in your kernel config file (along with the
	pseudo-device rnd
line) to enable this.  If results are positive, I will make this enabled
by default.
1997-10-19 11:45:33 +00:00
thorpej 9ba1ceb091 Pulldown from marc-pcmcia branch. 1997-10-15 22:00:10 +00:00
is 718fb97e11 Support for the upcoming NetBSD/Amiga Hypercom driver family:
* support chip clocks != COM_FREQ, by introducing sc_frequency (for the
  mainline code) and adding a frequency parameter right after the rate
  parameter to comcnattach() and com_kgdb_attach().
- Make com_isa and com_multi initialize sc_frequency to COM_FREQ.
- Make i386/machdep.c and alpha/dec_xxx.c call com*attach() with the freq.
  parameter.
* supio_attach_args get two more fields: a sc_ipl and a sc_arg, both ints.
- com_supio uses the first for interupt establishment (all childs will, as
  soon as they exist) and the 2nd for sc_frequency.
- drsupio passes sc_ipl alway as 5, and for the "com"s, sc_arg as 16*115200
- hyper will pass sc_ipl as 6, and sc_arg as 16 * 460800
1997-09-16 20:34:23 +00:00
drochner d36e668737 clean up the serial console / KGDB attachment:
-put all early console / KGDB initialization into 1 exported function
  (com_*_attach()) each, dont use global variables anymore
-use the passed tcflag_t for port settings instead of hardwiring 8N1
-at autoconfiguration attach time, decide if the attaching device is
  already console / KGDB by comparing bus tag and base addr (cgd's wish)
-export a function "com_is_console()" for use by driver frontends for
  this comparision
-delay setting of cn_tab->cn_dev until autoconfiguration attach
  to get the minor number right
-delete unused comcnprobe() and comcninit()
1997-08-23 14:01:32 +00:00
drochner b426bd9be3 -Export variables needed for system console initialization.
-Enable line break interrupt for DDB on a serial console.
-Share initialization code between DDB and KGDB.
1997-08-14 16:15:15 +00:00
drochner d5998780c0 KGDB improvements:
-Separate KGDB port initialization and softc related stuff to allow
 KGDB to be attached in early system startup, before autoconfiguration.
-Export the variables needed by md code to hand-craft bus tag/handle.
-Fix initialization to enable interrupt by line break.
-Call DDB/KGDB at line break (move DDB call from the softirq handler
 to the hard handler because it should work without a tty attached too).
1997-08-12 17:25:43 +00:00
thorpej 2252d1317b Add support for remote serial KGDB. 1997-07-05 20:52:40 +00:00
mycroft 09cad93ce8 Implement a better backpressure mechanism so that data is collected
in the driver's buffer if the tty buffer is full.  If the driver's buffer
becomes full, turn off receive interrupts until it drains a bit.
1997-06-15 11:18:59 +00:00
thorpej 97c6a307e3 Where _is_ that brick when you need it?! 1997-05-24 03:45:40 +00:00
mycroft 9448a01404 New version of com driver. Uses a different queueing mechanism and a split
hardware/software interrupt mechanism for improved performance.  Many odd
protocols bugs also fixed.
1997-04-04 20:56:34 +00:00
cgd b005a8ee10 move cominit() prototype to comvar.h, so that ports which use 'com'
for serial console, but don't use the (i386-specific)
comcninit()/comcnprobe() functions, can do the right thing.
1996-11-13 19:41:35 +00:00
thorpej 769a499800 New bus.h implementation/interface:
- No more distinction between i/o-mapped and memory-mapped
	  devices.  It's all "bus space" now, and space tags
	  differentiate the space with finer grain than the
	  bus chipset tag.
	- Add memory barrier methods.
	- Implement space alloc/free methods.
	- Implement region read/write methods (like memcpy to/from
	  bus space).
This interface provides a better abstraction for dealing with
machine-independent chipset drivers.
1996-10-21 22:34:38 +00:00
christos d53d6cd545 Move comintr() prototype to comvar.h; needed by the multi-port cards. 1996-05-05 19:50:44 +00:00
cgd b6549d493d define and export the global variable "comconscflag", the default tty
'cflag' for the console.  Normally set to TTYDEF_CFLAG, may be
overridden by machine-dependent console attachment code, as necessary.
(Alpha uses it to set cs8 -parenb.)  Files including comvar.h now
need to include <sys/termios.h>, because comconscflag is of type
tcflag_t.
1996-04-15 18:54:31 +00:00
cgd 85286bff2f convert these to use new <machine/bus.h> interfaces. This involved
substantial reworking of the multi-port drivers, as they need to frob
bits in the io-port spaces of their children.  As a result, the
commulti->com attachment interface is substantially more complex.
(This may be fixable in the future by making some of the code common,
but as long as io-port allocation checking is planned, it's necessary.)
1996-03-10 09:01:20 +00:00
cgd 5bfb840114 Fix copyright year 1996-03-09 23:37:14 +00:00
cgd 56edbfc4f9 define the common structure used to attach 'com' units as slaves to
multiport cards.  prototype comprobe1(), which is used by multiport card
drivers.
1996-03-09 01:01:33 +00:00