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/* $OpenBSD: ast.c,v 1.4 1996/03/08 16:42:48 niklas Exp $ */
/* $NetBSD: ast.c,v 1.18 1995/06/26 04:08:04 cgd Exp $ */
/*
* 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.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <machine/pio.h>
#include <dev/isa/isavar.h>
struct ast_softc {
struct device sc_dev;
void *sc_ih;
int sc_iobase;
int sc_alive; /* mask of slave units attached */
void *sc_slaves[4]; /* com device unit numbers */
};
int astprobe();
void astattach();
int astintr __P((void *));
struct cfdriver astcd = {
NULL, "ast", astprobe, astattach, DV_TTY, sizeof(struct ast_softc)
};
int
astprobe(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct isa_attach_args *ia = aux;
/*
* Do the normal com probe for the first UART and assume
* its presence means there is a multiport board there.
* XXX Needs more robustness.
*/
ia->ia_iosize = 4 * 8;
return (comprobe1(ia->ia_iobase));
}
struct ast_attach_args {
int aa_slave;
};
int
astsubmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct ast_softc *sc = (void *)parent;
struct cfdata *cf = match;
struct isa_attach_args *ia = aux;
struct ast_attach_args *aa = ia->ia_aux;
if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != aa->aa_slave)
return (0);
return ((*cf->cf_driver->cd_match)(parent, match, ia));
}
int
astprint(aux, ast)
void *aux;
char *ast;
{
struct isa_attach_args *ia = aux;
struct ast_attach_args *aa = ia->ia_aux;
printf(" slave %d", aa->aa_slave);
}
void
astattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ast_softc *sc = (void *)self;
struct isa_attach_args *ia = aux;
struct ast_attach_args aa;
struct isa_attach_args isa;
int subunit;
sc->sc_iobase = ia->ia_iobase;
/*
* Enable the master interrupt.
*/
outb(sc->sc_iobase | 0x1f, 0x80);
printf("\n");
isa.ia_aux = &aa;
for (aa.aa_slave = 0; aa.aa_slave < 4; aa.aa_slave++) {
struct cfdata *cf;
isa.ia_iobase = sc->sc_iobase + 8 * aa.aa_slave;
isa.ia_iosize = 0x666;
isa.ia_irq = IRQUNK;
isa.ia_drq = DRQUNK;
isa.ia_msize = 0;
if ((cf = config_search(astsubmatch, self, &isa)) != 0) {
subunit = cf->cf_unit; /* can change if unit == * */
config_attach(self, cf, &isa, astprint);
sc->sc_slaves[aa.aa_slave] =
cf->cf_driver->cd_devs[subunit];
sc->sc_alive |= 1 << aa.aa_slave;
}
}
sc->sc_ih = isa_intr_establish(ia->ia_irq, IST_EDGE, IPL_TTY, astintr,
sc, sc->sc_dev.dv_xname);
}
int
astintr(arg)
void *arg;
{
struct ast_softc *sc = arg;
int iobase = sc->sc_iobase;
int alive = sc->sc_alive;
int bits;
bits = ~inb(iobase | 0x1f) & 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);
#undef TRY
bits = ~inb(iobase | 0x1f) & alive;
if (bits == 0)
return (1);
}
}
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