diff options
author | nsouch <nsouch@FreeBSD.org> | 1998-10-28 00:51:40 +0000 |
---|---|---|
committer | nsouch <nsouch@FreeBSD.org> | 1998-10-28 00:51:40 +0000 |
commit | 996f90e0dc445a4625680e5c1f512af46c2a0d4c (patch) | |
tree | b2fb40616bd3290ccdb829969fec84a907c1d7d9 /share/man/man4/ppc.4 | |
parent | 5d56183f5d37f1c7cbc11f47e7b788a04ae3628d (diff) | |
download | FreeBSD-src-996f90e0dc445a4625680e5c1f512af46c2a0d4c.zip FreeBSD-src-996f90e0dc445a4625680e5c1f512af46c2a0d4c.tar.gz |
ppc.4 moved from man4 to man4.i386: parallel port chipset driver manpage
pcf.4 added: Philips I2C/isa interface manpage
Diffstat (limited to 'share/man/man4/ppc.4')
-rw-r--r-- | share/man/man4/ppc.4 | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/share/man/man4/ppc.4 b/share/man/man4/ppc.4 new file mode 100644 index 0000000..2aba549 --- /dev/null +++ b/share/man/man4/ppc.4 @@ -0,0 +1,112 @@ +.\" Copyright (c) 1998, Nicolas Souchu +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" +.Dd March 5, 1998 +.Dt PPC 4 +.Os FreeBSD +.Sh NAME +.Nm ppc +.Nd +Parallel port chipset driver +.Sh SYNOPSIS +.Cd "controller ppc0 at isa? port? tty irq 7 vector ppcintr" +.Pp +For one or more PPBUS busses: +.Cd "controller ppbus at ppc0" +.Sh DESCRIPTION +The +.Em ppc +driver provides low level support to various parallel port chipsets for the +.Xr ppbus 4 +system. +.Pp +During the probe phasis, ppc detects parallel port chipsets and initialize +private data according to their operating mode: COMPATIBLE, +NIBBLE, PS/2, EPP, ECP and other mixed modes. If a mode is provided at startup +throw the flags variable of the boot interface, the operating mode of the +chipset is forced according to 'flags' and its available modes. +.Pp +During attach phasis, ppc allocates a ppbus structure, initializes it and +calls ppbus attach function. +.Ss Supported flags +.Bl -item -offset indent +.It +bits 0-4: chipset forced mode(s) +.Bd -literal +PPB_COMPATIBLE 0x0 /* Centronics compatible mode */ +PPB_NIBBLE 0x1 /* reverse 4 bit mode */ +PPB_PS2 0x2 /* PS/2 byte mode */ +PPB_EPP 0x4 /* EPP mode, 32 bit */ +PPB_ECP 0x8 /* ECP mode */ +.Ed +.Pp +And any mixed values. +.It +bit 5: EPP protocol (0 EPP 1.9, 1 EPP 1.7) +.It +bit 6: activate IRQ (1 IRQ disabled, 0 IRQ enabled) +.El +.Ss Supported chipsets +Some parallel port chipsets are explicitly supported by ppc: detection and +initialisation code has been written according to specs datasheets. +.Bl -bullet -offset indent +.It +SMC FDC37C665GT and FDC37C666GT chipsets +.It +Natsemi PC873xx-family (PC87332 and PC87306) +.It +Winbond W83877xx-family (W83877F and W83877AF) +.It +SMC-like chipsets with mixed modes (see +.Xr ppbus 4 ) +.El +.Ss Adding support to a new chipset +You may want to add support for the newest chipset your last motherboard was +sold with? For the ISA bus, just retrieve the specs of the chipset and +write the corresponding +.Fn ppc_mychipset_detect "" +function. +Then add an entry to the general purpose +.Fn ppc_detect "" +function. +.Pp +Your +.Fn ppc_mychipset_detect "" +function should ensure that: if the mode field of the +.Va flags +boot variable is not null, then the operating +mode is forced to the given mode and no other mode is available and +ppb->ppb_avm field contains the available modes of the chipset +.Sh SEE ALSO +.Xr ppbus 4 +.Sh HISTORY +The +.Nm +manual page first appeared in +.Fx 3.0 . +.Sh AUTHOR +This +manual page was written by +.An Nicolas Souchu . |