diff options
author | imp <imp@FreeBSD.org> | 2003-09-07 04:59:15 +0000 |
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committer | imp <imp@FreeBSD.org> | 2003-09-07 04:59:15 +0000 |
commit | aa774ecaa004aa99b4798365f601ee19664a9f18 (patch) | |
tree | af84bfa638d66c3067f34292bb7544fcc13c0302 /sys/dev/uart/uart_cpu_pc98.c | |
parent | 74da2bc37220a00021280f4b3f3c5a705605eeeb (diff) | |
download | FreeBSD-src-aa774ecaa004aa99b4798365f601ee19664a9f18.zip FreeBSD-src-aa774ecaa004aa99b4798365f601ee19664a9f18.tar.gz |
Better stab at MD code for pc98. The 8251 stuff is a total lie
(ns8250 copied and s/ns8250/i8251/g), but there for linkage purposes.
Real code to follow, once I get past some boot issues on my pc98 boxes
with recent current.
Diffstat (limited to 'sys/dev/uart/uart_cpu_pc98.c')
-rw-r--r-- | sys/dev/uart/uart_cpu_pc98.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/sys/dev/uart/uart_cpu_pc98.c b/sys/dev/uart/uart_cpu_pc98.c new file mode 100644 index 0000000..ab7f0b7 --- /dev/null +++ b/sys/dev/uart/uart_cpu_pc98.c @@ -0,0 +1,96 @@ +/* + * Copyright (c) 2003 M. Warner Losh, Marcel Moolenaar + * 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 ``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 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> + +#include <machine/bus.h> + +#include <dev/uart/uart.h> +#include <dev/uart/uart_cpu.h> + +int +uart_cpu_getdev(int devtype, struct uart_devinfo *di) +{ + unsigned int i, ivar, flags; + + /* + * There are 2 built-in serial ports on pc98 hardware. The + * first one is 8251 and the second one is I think an enhance + * version of that. However, for sio flags told the story + * so make a lame attempt to sort this out. + */ + for (i = 0; i < 1; i++) { + if (resource_int_value("uart", i, "flags", &flags)) + continue; + if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(flags)) + continue; + if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(flags)) + continue; + /* + * We have a possible device. Make sure it's enabled and + * that we have an I/O port. + */ + if (resource_int_value("uart", i, "disabled", &ivar) == 0 && + ivar != 0) + continue; + if (resource_int_value("uart", i, "port", &ivar) != 0 || + ivar == 0) + continue; + /* + * Got it. Fill in the instance and return it. We have + * both i8251 an ns8250 and successors on pc98. + */ + if (flags & 0x100) + di->ops = uart_ns8250_ops; + else + di->ops = uart_i8251_ops; + di->bas.bst = I386_BUS_SPACE_IO; + di->bas.bsh = ivar; + di->bas.regshft = 0; + di->bas.rclk = 0; + if (resource_int_value("uart", i, "baud", &ivar) != 0) + ivar = 0; + di->baudrate = ivar; + di->databits = 8; + di->stopbits = 1; + di->parity = UART_PARITY_NONE; + return (0); + } + + return (ENXIO); +} + +int +uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) +{ + + return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0); +} |