Commit Graph

21 Commits

Author SHA1 Message Date
Zbigniew Bodek
49e368ac48 Wait for DesignWare UART transfers completion before accessing line control
When using DW UART with BUSY detection it is necessary to wait
until all serial transfers are finished before manipulating the
line control. LCR will not be affected when UART is busy.
In addition, if Divisor Latch Access Bit is being set in order to
modify UART divisors:
1. We will get BUSY interrupt if interrupts are enabled.
2. Because LCR will not be affected the THR and (even worse) IER
   contents will be corrupted. This will lead to console hang.

Approved by:	cognet (mentor)
2013-10-26 17:24:59 +00:00
Ganbold Tsagaankhuu
ac4adddf04 Add support for A10 uart.
A10 uart is derived from Synopsys DesignWare uart and requires
to read Uart Status Register when IIR_BUSY has detected.
Also this change includes FDT check, where it checks device
specific properties defined in dts and sets the busy_detect variable.
broken_txfifo is also needed to be set in order to make it work for
A10 uart case.

Reviewed by: marcel@
Approved by: gonzo@
2013-03-01 01:42:31 +00:00
Warner Losh
18f323353c Merge from projects/mips to head by hand:
Defintions for cavium uart (do they belong here?)
2010-01-11 04:13:06 +00:00
Sam Leffler
04ddfac339 add %b formats for various registers 2009-06-21 19:17:22 +00:00
Yoshihiro Takahashi
5798cf97e9 unifdef PC98 2008-08-29 12:25:58 +00:00
Benno Rice
58957d8717 Allow uart(4)'s ns8250 driver to work with devices whose regshift is > 0.
- Rename REG_DL to REG_DLL and REG_DLH.
- Always treat DLL and DLH as two separate 8-bit registers instead of one
  16-bit register.

Additionally, remove the probe for the high 4 bits of IER being 0 and don't
assume we can always read/write 0 to/from those bits.

These changes allow uart(4) to drive the UARTs on the Intel XScale PXA255.

Reviewed by:	marcel
2006-05-23 00:41:12 +00:00
Marcel Moolenaar
4f5d62fbc6 o Remove the com_thr, com_rhr, com_isr and com_lctl defines. They are
not used and aliases for other defines.
o  Add REG_DATA as an alias for com_data. Likewise for other register
   defines.
o  Add LCR_SBREAK and make CFCR_SBREAK an alias for it. Likewise for
   the other LCR register bits that are known with the CFCR prefix.
o  Add MCR_IE and make MCR_IENABLE an alias for it.
o  Add LSR_TEMT and make LSR_TSRE an alias for it.
o  Add LSR_THRE and make LSR_TXRDY as alias for it.
o  Add FCR_ENABLE and make FIFO_ENABLE as alias for it. Likewise for
   the other FCR register bits that are known with the FIFO prefix.
o  Add EFR_CTS and make EFR_AUTOCTS an alias for it.
o  Add EFR_RTS and make EFR_AUTORTS an alias for it.

This is a first step in cleaning up the definitions in this file.
2004-11-20 23:19:42 +00:00
Warner Losh
f36cfd49ad Remove advertising clause from University of California Regent's
license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson
2004-04-07 20:46:16 +00:00
Bruce Evans
efcfe95173 Added definitions of most of the interesting 16950 register numbers
and some of their bits (i.e., fifo trigger levels, frequency multipliers
and divisors, and bits to select the registers for these).  This
attempts to completely describe the 16950's complicated register selects
for 16950-specific registers only.
2003-09-16 14:21:17 +00:00
Bruce Evans
fec27f507c Added definitions for some 16650 features (mostly misfeatures). This
completes defining the 16650 register numbers but not all of their bits.
2003-09-16 14:08:54 +00:00
Bruce Evans
2b843bc94b Fixed a minor error in the description of the EFR and a major error in
the description of the data latch registers (they were described as
readonly).

Added some better and worse aliases for standard registers, mostly taken
from the 16950 data sheet.  Define deprecated aliases in terms of the
preferred one.

Don't define com_efr in terms of com_fifo.  It is unrelated (in a
different bank).
2003-09-16 13:52:01 +00:00
Bruce Evans
74814b322a Sorted register numbers together with the correspoding register bits.
Merged comments to match (put them at the right of the #defines instead
of duplicating them).

Sorted the resulting sections on UART type and register bank.  Added a
comment for each bank.
2003-09-16 11:54:29 +00:00
Bruce Evans
86fe87393a Moved the definitions of the bits in the ns*50 registers from sioreg.h
to ns16550.h.  The organization of these files was sort of backwards.
The bits in the registers have no driver or bus dependencies but they
but the offsets of the registers in bus space are very bus-dependent.
However, it does no harm to keep the definitions of the register offsets
in ns16550.h provided they are thought of as internal ns*50 offsets.
2003-09-16 08:08:08 +00:00
Poul-Henning Kamp
c8423e9702 Move the com_scr register address definition over with the other seven.
Approved by:	bde
2002-09-22 08:51:31 +00:00
Yoshihiro Takahashi
da0f982b48 Removed unneeded pc98 code (merged from i386/isa/ic/ns16550.h). 2001-06-10 04:18:19 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Satoshi Asami
0e408c25a1 Another round of merge/update.
(1) Add PC98 support to apm_bios.h and ns16550.h, remove pc98/pc98/ic
(2) Move PC98 specific code out of cpufunc.h (to pc98.h)
(3) Let the boot subtrees look more alike

Submitted by:	The FreeBSD(98) Development Team
		<freebsd98-hackers@jp.freebsd.org>
1996-09-12 11:12:18 +00:00
Rodney W. Grimes
6f78ca6026 Removed all patch kit headers, sccsid and rcsid strings, put $Id$ in, some
minor cleanup.  Added $Id$ to files that did not have any version info, etc
1993-10-16 13:48:52 +00:00
Rodney W. Grimes
5b81b6b301 Initial import, 0.1 + pk 0.2.4-B1 1993-06-12 14:58:17 +00:00