/* $NetBSD: tcom.c,v 1.9 2004/09/14 20:20:49 drochner 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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 __KERNEL_RCSID(0, "$NetBSD: tcom.c,v 1.9 2004/09/14 20:20:49 drochner Exp $"); #include #include #include #include #include #include #include #include #include #include #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 { 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_statusioh; }; int tcomprobe __P((struct device *, struct cfdata *, void *)); void tcomattach __P((struct device *, struct device *, void *)); int tcomintr __P((void *)); CFATTACH_DECL(tcom, sizeof(struct tcom_softc), tcomprobe, tcomattach, NULL, NULL); int tcomprobe(parent, self, aux) struct device *parent; struct cfdata *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(parent, self, aux) struct device *parent, *self; void *aux; { struct tcom_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_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])) { printf("%s: can't map i/o space for slave %d\n", sc->sc_dev.dv_xname, i); return; } } if (bus_space_map(iot, sc->sc_iobase + STATUS_OFFSET, STATUS_SIZE, 0, &sc->sc_statusioh)) { printf("%s: can't map status space\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 = sc->sc_iobase + i * COM_NPORTS; ca.ca_noien = 0; sc->sc_slaves[i] = config_found(self, &ca, commultiprint); if (sc->sc_slaves[i] != NULL) sc->sc_alive |= 1 << i; } 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); } }