NetBSD-5.0.2/sys/dev/isa/tcom.c
/* $NetBSD: tcom.c,v 1.17 2008/09/28 15:39:40 martin Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Eric S. Hvozda.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright (c) 1998 Jukka Marin. All rights reserved.
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
* Copyright (c) 1995 Charles Hannum. All rights reserved.
*
* This code is derived from public-domain software written by
* Roland McGrath.
*
* 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 product includes software developed by Charles Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*/
/*
* NOTE: This driver has been tested in TCOM "UNIX mode" with base address
* set to 0x100 or 0x200 and baud rate jumpers to "normal". This code
* does NOT know about the 2x and 4x baud rates available on TCOM cards.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tcom.c,v 1.17 2008/09/28 15:39:40 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/termios.h>
#include <sys/bus.h>
#include <sys/intr.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include <dev/isa/isavar.h>
#include <dev/isa/com_multi.h>
#define NSLAVES 8 /* TCOM cards have 4 or 8 UARTs */
#define STATUS_OFFSET 0x40 /* offset from board base address */
#define STATUS_SIZE 8 /* 8 bytes reserved for irq status */
struct tcom_softc {
device_t sc_dev;
void *sc_ih;
bus_space_tag_t sc_iot;
int sc_iobase;
int sc_alive; /* mask of slave units attached */
void *sc_slaves[NSLAVES]; /* com device softc pointers */
bus_space_handle_t sc_slaveioh[NSLAVES];
bus_space_handle_t sc_statusioh;
};
int tcomprobe(struct device *, cfdata_t, void *);
void tcomattach(struct device *, device_t, void *);
int tcomintr(void *);
CFATTACH_DECL_NEW(tcom, sizeof(struct tcom_softc),
tcomprobe, tcomattach, NULL, NULL);
int
tcomprobe(struct device *parent, cfdata_t self, void *aux)
{
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
int i, iobase, rv = 1;
/*
* Do the normal com probe for the first UART and assume
* its presence, and the ability to map the other UARTS,
* means there is a multiport board there.
* XXX Needs more robustness.
*/
if (ia->ia_nio < 1)
return (0);
if (ia->ia_nirq < 1)
return (1);
if (ISA_DIRECT_CONFIG(ia))
return (0);
/* Disallow wildcarded i/o address. */
if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
return (0);
if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
return (0);
/* if the first port is in use as console, then it. */
if (com_is_console(iot, ia->ia_io[0].ir_addr, 0))
goto checkmappings;
if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) {
rv = 0;
goto out;
}
rv = comprobe1(iot, ioh);
bus_space_unmap(iot, ioh, COM_NPORTS);
if (rv == 0)
goto out;
checkmappings:
for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) {
iobase += COM_NPORTS;
if (com_is_console(iot, iobase, 0))
continue;
if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
rv = 0;
goto out;
}
bus_space_unmap(iot, ioh, COM_NPORTS);
}
out:
if (rv) {
ia->ia_nio = 1;
ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
ia->ia_nirq = 1;
ia->ia_niomem = 0;
ia->ia_ndrq = 0;
}
return (rv);
}
void
tcomattach(struct device *parent, device_t self, void *aux)
{
struct tcom_softc *sc = device_private(self);
struct isa_attach_args *ia = aux;
struct commulti_attach_args ca;
bus_space_tag_t iot = ia->ia_iot;
int i, iobase;
device_t slave;
printf("\n");
sc->sc_dev = self;
sc->sc_iot = ia->ia_iot;
sc->sc_iobase = ia->ia_io[0].ir_addr;
for (i = 0; i < NSLAVES; i++) {
iobase = sc->sc_iobase + i * COM_NPORTS;
if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
bus_space_map(iot, iobase, COM_NPORTS, 0,
&sc->sc_slaveioh[i])) {
aprint_error_dev(sc->sc_dev, "can't map i/o space for slave %d\n", i);
return;
}
}
if (bus_space_map(iot, sc->sc_iobase + STATUS_OFFSET, STATUS_SIZE, 0,
&sc->sc_statusioh)) {
aprint_error_dev(sc->sc_dev, "can't map status space\n");
return;
}
for (i = 0; i < NSLAVES; i++) {
ca.ca_slave = i;
ca.ca_iot = sc->sc_iot;
ca.ca_ioh = sc->sc_slaveioh[i];
ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
ca.ca_noien = 0;
slave = config_found(self, &ca, commultiprint);
if (slave != NULL) {
sc->sc_alive |= 1 << i;
sc->sc_slaves[i] = device_private(slave);
}
}
sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
IST_EDGE, IPL_SERIAL, tcomintr, sc);
}
int
tcomintr(arg)
void *arg;
{
struct tcom_softc *sc = arg;
bus_space_tag_t iot = sc->sc_iot;
int alive = sc->sc_alive;
int bits;
bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive;
if (bits == 0)
return (0);
for (;;) {
#define TRY(n) \
if (bits & (1 << (n))) \
comintr(sc->sc_slaves[n]);
TRY(0);
TRY(1);
TRY(2);
TRY(3);
TRY(4);
TRY(5);
TRY(6);
TRY(7);
#undef TRY
bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive;
if (bits == 0)
return (1);
}
}