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/* $OpenBSD: com_lbus.c,v 1.6 1998/03/01 16:19:13 niklas Exp $ */
/*
* Copyright (c) 1993, 1994 Charles Hannum.
* Copyright (c) 1990 William F. Jolitz, TeleMuse
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This software is a component of "386BSD" developed by
* William F. Jolitz, TeleMuse.
* 4. Neither the name of the developer nor the name "386BSD"
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
* AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
* SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
* THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
* NOT MAKE USE OF THIS WORK.
*
* FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
* BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
* REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
* (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
* JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
* LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
* ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
* OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``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 DEVELOPER 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.
*/
/*
* Device Driver for Serial ports
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/tty.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/isa/isavar.h> /* XXX for isa_chipset_tag_t in com_softc */
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include <dev/ic/ns16550reg.h>
/* Macros to clear/set/test flags. */
#define SET(t, f) (t) |= (f)
#define CLR(t, f) (t) &= ~(f)
#define ISSET(t, f) ((t) & (f))
int com_localbus_probe __P((struct device *, void *, void *));
void com_localbus_attach __P((struct device *, struct device *, void *));
struct cfattach com_pica_ca = {
sizeof(struct com_softc), com_localbus_probe, com_localbus_attach
};
struct cfattach com_algor_ca = {
sizeof(struct com_softc), com_localbus_probe, com_localbus_attach
};
int
com_localbus_probe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
bus_space_tag_t iot;
bus_space_handle_t ioh;
int iobase;
int rv = 1;
struct confargs *ca = aux;
if(!BUS_MATCHNAME(ca, "com"))
return(0);
ioh = iobase = (long)BUS_CVTADDR(ca);
iot = &arc_bus_io;
/* if it's in use as console, it's there. */
if (iobase == comconsaddr && !comconsattached) {
return(rv);
}
rv = comprobe1(iot, ioh);
return (rv);
}
void
com_localbus_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct com_softc *sc = (void *)self;
int iobase;
bus_space_tag_t iot;
bus_space_handle_t ioh;
struct confargs *ca = aux;
sc->sc_hwflags = 0;
sc->sc_swflags = 0;
sc->sc_iobase = iobase = (bus_addr_t)BUS_CVTADDR(ca);
sc->sc_ioh = ioh = (bus_space_handle_t)iobase;
sc->sc_iot = iot = &arc_bus_io;
if (iobase == comconsaddr) {
comconsattached = 1;
/*
* Need to reset baud rate, etc. of next print so reset
* comconsinit. Also make sure console is always "hardwired".
*/
delay(1000); /* wait for output to finish */
comconsinit = 0;
SET(sc->sc_hwflags, COM_HW_CONSOLE);
SET(sc->sc_swflags, COM_SW_SOFTCAR);
}
/* look for a NS 16550AF UART with FIFOs */
bus_space_write_1(iot, ioh, com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_14);
delay(100);
if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_FIFO_MASK) ==
IIR_FIFO_MASK) {
if (ISSET(bus_space_read_1(iot, ioh, com_fifo),
FIFO_TRIGGER_14) == FIFO_TRIGGER_14) {
SET(sc->sc_hwflags, COM_HW_FIFO);
printf(": ns16550a, working fifo\n");
} else
printf(": ns16550, broken fifo\n");
} else
printf(": ns8250 or ns16450, no fifo\n");
bus_space_write_1(iot, ioh, com_fifo, 0);
/* disable interrupts */
bus_space_write_1(iot, ioh, com_ier, 0);
bus_space_write_1(iot, ioh, com_mcr, 0);
BUS_INTR_ESTABLISH(ca, comintr, (void *)(long)sc);
#ifdef KGDB
if (kgdb_dev == makedev(commajor, unit)) {
if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
kgdb_dev = -1; /* can't debug over console port */
else {
cominit(iot, ioh, kgdb_rate);
if (kgdb_debug_init) {
/*
* Print prefix of device name,
* let kgdb_connect print the rest.
*/
printf("%s: ", sc->sc_dev.dv_xname);
kgdb_connect(1);
} else
printf("%s: kgdb enabled\n",
sc->sc_dev.dv_xname);
}
}
#endif
/* XXX maybe move up some? */
if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
printf("%s: console\n", sc->sc_dev.dv_xname);
}
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