/* $NetBSD: ioat66.c,v 1.5 2002/10/02 03:10:48 thorpej Exp $ */ /* * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. * Copyright (c) 1995 Charles M. Hannum. All rights reserved. * * This code is derived from public-domain software written by * Roland McGrath, and information provided by David Muir Sharnoff. * * 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 M. 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 __KERNEL_RCSID(0, "$NetBSD: ioat66.c,v 1.5 2002/10/02 03:10:48 thorpej Exp $"); #include #include #include #include #include #include #include #include #include #include #define NSLAVES 6 struct ioat66_softc { struct device 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 unit numbers */ bus_space_handle_t sc_slaveioh[NSLAVES]; bus_space_handle_t sc_intmasq; }; int ioatbases[NSLAVES]={0x220,0x228,0x240,0x248,0x260,0x268}; #define IOAT66SHARED 0x208 int ioat66probe __P((struct device *, struct cfdata *, void *)); void ioat66attach __P((struct device *, struct device *, void *)); int ioat66intr __P((void *)); int ioat66print __P((void *, const char *)); CFATTACH_DECL(ioat, sizeof(struct ioat_softc), ioat66probe, ioat66attach, NULL, NULL); int ioat66probe(parent, self, aux) struct device *parent; struct cfdata *self; void *aux; { struct isa_attach_args *ia = aux; int iobase = ia->ia_iobase; bus_space_tag_t iot = ia->ia_iot; bus_space_handle_t ioh; int i, 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. */ /* Disallow wildcarded i/o address. */ if (ia->ia_iobase == ISACF_PORT_DEFAULT) return (0); /* if the first port is in use as console, then it. */ if (com_is_console(iot, iobase, 0)) goto checkmappings; if (bus_space_map(iot, iobase, 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; i < NSLAVES; i++) { iobase = ioatbases[i]; 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_iosize = NSLAVES * COM_NPORTS; return (rv); } int ioat66print(aux, pnp) void *aux; const char *pnp; { struct commulti_attach_args *ca = aux; if (pnp) printf("com at %s", pnp); printf(" slave %d", ca->ca_slave); return (UNCONF); } void ioat66attach(parent, self, aux) struct device *parent, *self; void *aux; { struct ioat66_softc *sc = (void *)self; struct isa_attach_args *ia = aux; struct commulti_attach_args ca; bus_space_tag_t iot = ia->ia_iot; int i, iobase; printf("\n"); sc->sc_iot = ia->ia_iot; sc->sc_iobase = ia->ia_iobase; for (i = 0; i < NSLAVES; i++) { iobase = ioatbases[i]; if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_slaveioh[i])) { printf("%s: can't map i/o space for slave %d\n", sc->sc_dev.dv_xname, i); return; } } if(bus_space_map(iot, IOAT66SHARED, 1, 0, &sc->sc_intmasq)) { printf("%s: can't map shared interupt mask\n", sc->sc_dev.dv_xname); 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 = ioatbases[i]; ca.ca_noien = 0; sc->sc_slaves[i] = config_found(self, &ca, ioat66print); if (sc->sc_slaves[i] != NULL) sc->sc_alive |= 1 << i; } sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, IPL_SERIAL, ioat66intr, sc); } int ioat66intr(arg) void *arg; { struct ioat66_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_intmasq, 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); #undef TRY bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive; if (bits == 0) return (1); } }