/* $NetBSD: addcom_isa.c,v 1.21 2016/07/11 11:31:50 msaitoh Exp $ */ /* * Copyright (c) 2000 Michael Graff. All rights reserved. * 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. */ /* * This code was written and tested with the Addonics FlexPort 8S. * It has 8 ports, using 16650-compatible chips, sharing a single * interrupt. * * An interrupt status register exists at 0x240, according to the * skimpy documentation supplied. It doesn't change depending on * io base address, so only one of these cards can ever be used at * a time. * * This card is different from the boca or other cards in that ports * 0..5 are from addresses 0x108..0x137, and 6..7 are from 0x200..0x20f, * making a gap that the other cards do not have. * * The addresses which are documented are 0x108, 0x1108, 0x1d08, and * 0x8508, for the base (port 0) address. * * --Michael -- April 21, 2000 */ #include __KERNEL_RCSID(0, "$NetBSD: addcom_isa.c,v 1.21 2016/07/11 11:31:50 msaitoh Exp $"); #include #include #include #include #include #include #include #include #include #include #define NSLAVES 8 /* * Grr. This card always uses 0x420 for the status register, regardless * of io base address. */ #define STATUS_IOADDR 0x420 #define STATUS_SIZE 8 /* May be bogus... */ struct addcom_softc { 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; }; #define SLAVE_IOBASE_OFFSET 0x108 static int slave_iobases[8] = { 0x108, /* port 0, base port */ 0x110, 0x118, 0x120, 0x128, 0x130, 0x200, /* port 7, note address skip... */ 0x208 }; int addcomprobe(device_t, cfdata_t, void *); void addcomattach(device_t, device_t, void *); int addcomintr(void *); CFATTACH_DECL_NEW(addcom_isa, sizeof(struct addcom_softc), addcomprobe, addcomattach, NULL, NULL); int addcomprobe(device_t 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 (0); 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); iobase = ia->ia_io[0].ir_addr; /* 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 += slave_iobases[i] - slave_iobases[i - 1]; 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 addcomattach(device_t parent, device_t self, void *aux) { struct addcom_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; printf("\n"); sc->sc_iot = ia->ia_iot; sc->sc_iobase = ia->ia_io[0].ir_addr; if (bus_space_map(iot, STATUS_IOADDR, STATUS_SIZE, 0, &sc->sc_statusioh)) { aprint_error_dev(self, "can't map status space\n"); return; } for (i = 0; i < NSLAVES; i++) { iobase = sc->sc_iobase + slave_iobases[i] - SLAVE_IOBASE_OFFSET; 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(self, "can't map i/o space for slave %d\n", i); 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 + slave_iobases[i] - SLAVE_IOBASE_OFFSET; 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, addcomintr, sc); } int addcomintr(void *arg) { struct addcom_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); } }