09cad93ce8
Implement a better backpressure mechanism so that data is collected
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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
6bfd7b7d45
Remove unneeded call to comstop() in commsrint(). This fixes a problem
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where the driver would sometimes retransmit bytes.
1997-05-26 14:54:46 +00:00
9448a01404
New version of com driver. Uses a different queueing mechanism and a split
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hardware/software interrupt mechanism for improved performance. Many odd
protocols bugs also fixed.
1997-04-04 20:56:34 +00:00
232ade1b2b
comdefaultrate -> comconsrate
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comconsbah -> comconsioh
Only use comconsrate on the console.
1997-04-04 20:49:49 +00:00
f89ffa1fe4
don't clobber IER in cominit(). (suggested by mycroft.)
1997-01-30 19:42:33 +00:00
be33336052
If attaching the console, reinitialize it immediately.
1996-12-14 10:46:38 +00:00
58e4442168
Turn off the baud rate changing optimization.
1996-12-14 08:56:23 +00:00
197d80c63a
update these so they compile whether or not __BROKEN_INDIRECT_CONFIG
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is defined.
1996-12-05 01:25:23 +00:00
b005a8ee10
move cominit() prototype to comvar.h, so that ports which use 'com'
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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
233251d896
add missing argument to bus_space_map in ESP code
1996-10-22 00:45:25 +00:00
769a499800
New bus.h implementation/interface:
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- 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
86373f8cf9
backout kprintf changes
1996-10-13 01:37:04 +00:00
58953408cb
printf -> kprintf, sprintf -> ksprintf
1996-10-10 22:04:48 +00:00
767522373b
If we get a RXRDY interrupt, but RXRDY is not set in the LSR, briefly set IER
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to 0. This fixes a condition where some UARTs send an infinite stream of
RXRDY interrupts.
1996-10-06 01:52:26 +00:00
d1f08e3e87
Serial console changes:
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* Enable FIFO with trigger level 1.
* Set DTR and RTS so terminals are happy.
1996-10-06 01:46:04 +00:00
82f0b829e8
compoll() -> comsoft()
1996-09-05 16:42:32 +00:00
b3eac79b64
tty stop functions really should return void, not int, and certainly not both.
1996-09-02 06:43:16 +00:00
bc2f07f331
move DDB-only label inside an #ifdef, so that -Wall works
1996-07-10 18:14:04 +00:00
08d585e924
add tty_attach() where appropriate.
1996-05-30 18:24:09 +00:00
cec36bf8d5
Use intr.h.
1996-05-12 23:51:23 +00:00
d53d6cd545
Move comintr() prototype to comvar.h; needed by the multi-port cards.
1996-05-05 19:50:44 +00:00
e8a8a6298c
- prototype fixes
1996-04-29 20:02:32 +00:00
b6549d493d
define and export the global variable "comconscflag", the default tty
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'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
51e85d07b9
update for addition of a machine-dependent cookie as the first argument
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to isa_intr_{,dis}establish().
1996-04-11 22:27:59 +00:00
179f65d15e
Add #ifdef's at the right places, on NCOM_ISA and NCOM_COMMULTI, to
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only include the relevant code in the probe & attach functions. Still
one probe and one attach function, with #ifdefs, but this is a step
in the right direction and saves a few hundred bytes (ooh, ahh!).
1996-03-17 13:38:14 +00:00
6d9ea4cf59
New device attachment scheme:
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- split softc size and match/attach out from cfdriver into
a new struct cfattach.
- new "attach" directive for files.*. May specify the name of
the cfattach structure, so that devices may be easily attached
to parents with different autoconfiguration semantics.
1996-03-17 00:43:52 +00:00
85286bff2f
convert these to use new <machine/bus.h> interfaces. This involved
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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
a7c6dfe1cd
include comvar.h for comprobe1() prototype
1996-03-09 01:02:08 +00:00
4005c5fd09
Fix typo (PR 2123, from Michael VanLoon)
1996-02-26 22:48:32 +00:00
a35f0ac985
Add more debugging code.
1996-02-20 12:13:09 +00:00
5021ab87f1
Update copyright notice.
1996-02-19 15:23:25 +00:00
5bc567b0d3
Set IER_ETXRDY before outputting any bytes, to prevent race condition.
1996-02-19 15:09:25 +00:00
c011a5eae4
Handle break more correctly.
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Make IER_ETXRDY track TS_BUSY. (Prevents a loop in comintr() if no output
is available.)
Add a bunch of debugging code.
1996-02-19 14:53:03 +00:00
e5730c4a73
Fix a race condition where we might stop outputting if a write follows a
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flush too closely.
1996-02-18 09:10:15 +00:00
203f5d5329
Add some text describing the UART lossage worked around in the previous.
1996-02-17 04:51:41 +00:00
121f6570d7
Drain the transmitter FIFO before changing the baud rate or FIFO depth
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registers. Fixes PR 2046.
Also, if COMCONSOLE is defined, expect CONSPEED to be the baud rate.
1996-02-17 04:04:28 +00:00
11d31f7ce7
Hayes ESP patches [from PR database]
1996-02-10 20:23:18 +00:00
d3427703db
Hayes ESP support from Michael Van Loon, with minor cleanups. Tested on
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a single port ESP card; works great!
1996-01-14 23:44:34 +00:00
3da4b2a160
The IST_* and IPL_* constants are not bus-specific; don't treat them as such.
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Change splimp -> splnet in Ethernet, ARCnet, and FDDI drivers.
1995-12-24 02:29:35 +00:00
f096f370fb
Use SET(), CLR(), and ISSET() macros.
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Rename CFCR to LCR, and cache its value.
Check MSR before transmitting, for better flow control.
Preserve LCR_SBREAK inside comparam().
1995-10-15 19:43:04 +00:00
eb99dcc09a
Fix a condition where ttywait() wouldn't be woken up. Also, short-circuit
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the case of no pending input in compoll().
1995-07-04 06:47:18 +00:00
2b71eae2c7
note that most of dev/ic's contents have changed names
1995-06-28 04:30:30 +00:00
4bfd7749ad
Various:
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* Check for CTS in the correct register.
* Only do a selwakeup() if we output something.
* Don't make assumptions about what TTYDISC does.
1995-06-05 19:08:09 +00:00
5b37a8fded
Handle BREAK correctly when not entering DDB.
1995-06-04 20:50:14 +00:00
38847d04c0
Add an input FIFO, and fix several flow control problems. Based on code from
...
Felix A. Croes.
1995-06-04 20:39:22 +00:00
d045544ebd
Changed ns82450 to ns8250 and dropped ns82550 from probe console messages.
1995-06-01 21:26:51 +00:00
addaff473b
Only use the `no pending interrupt' bit in the IIR; the other bits
...
are too unreliable on clone chips.
1995-05-28 03:26:37 +00:00
c821cb684a
(1) conditionalize debugger usage in comeint with DDB, not COMCONSOLE;
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latter would lead to undefined symbols if DDB not defined.
(2) check for break on console, and therefore debugger entry (if ddb
in kernel) earlier, so that the device doesn't need to be open.
(3) return immediately after breaking into the debugger in comeint().
(4) only do the normal character input routine in comintr if receive
mask yeilds _EXACLTY_ LSR_RXRDY. if there's only a receive
error, or there's a receive error _and_ a received character,
do comeint().
(former two by me. latter two from Bob Baron <rvb@cs.cmu.edu>.)
1995-05-12 17:54:41 +00:00
c9319ad5c4
<break> --> ddb if defined(comconsole).
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(if you have a serial console and you hit break, you get ddb).
1995-04-28 00:34:08 +00:00
9e28a35469
Fix thinko in previous change.
1995-04-19 22:04:33 +00:00
mycroft