Annotation of sys/dev/isa/com_isa.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: com_isa.c,v 1.4 2005/10/24 14:22:34 fgsch Exp $ */
! 2: /*
! 3: * Copyright (c) 1997 - 1999, Jason Downs. All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name(s) of the author(s) nor the name OpenBSD
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
! 18: * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 19: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
! 20: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
! 21: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 22: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 23: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
! 24: * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29: /*-
! 30: * Copyright (c) 1993, 1994, 1995, 1996
! 31: * Charles M. Hannum. All rights reserved.
! 32: * Copyright (c) 1991 The Regents of the University of California.
! 33: * All rights reserved.
! 34: *
! 35: * Redistribution and use in source and binary forms, with or without
! 36: * modification, are permitted provided that the following conditions
! 37: * are met:
! 38: * 1. Redistributions of source code must retain the above copyright
! 39: * notice, this list of conditions and the following disclaimer.
! 40: * 2. Redistributions in binary form must reproduce the above copyright
! 41: * notice, this list of conditions and the following disclaimer in the
! 42: * documentation and/or other materials provided with the distribution.
! 43: * 3. Neither the name of the University nor the names of its contributors
! 44: * may be used to endorse or promote products derived from this software
! 45: * without specific prior written permission.
! 46: *
! 47: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 48: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 49: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 50: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 51: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 52: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 53: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 54: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 55: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 56: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 57: * SUCH DAMAGE.
! 58: *
! 59: * @(#)com.c 7.5 (Berkeley) 5/16/91
! 60: */
! 61:
! 62: #include <sys/param.h>
! 63: #include <sys/systm.h>
! 64: #include <sys/tty.h>
! 65: #include <sys/device.h>
! 66:
! 67: #include <machine/intr.h>
! 68: #include <machine/bus.h>
! 69:
! 70: #include <dev/ic/comreg.h>
! 71: #include <dev/ic/comvar.h>
! 72:
! 73: #include <dev/isa/isavar.h>
! 74:
! 75: int com_isa_probe(struct device *, void *, void *);
! 76: void com_isa_attach(struct device *, struct device *, void *);
! 77:
! 78: struct cfattach com_isa_ca = {
! 79: sizeof(struct com_softc), com_isa_probe, com_isa_attach
! 80: };
! 81:
! 82: int
! 83: com_isa_probe(struct device *parent, void *match, void *aux)
! 84: {
! 85: struct isa_attach_args *ia = aux;
! 86: bus_space_handle_t ioh;
! 87: bus_space_tag_t iot;
! 88: int iobase;
! 89: int rv;
! 90:
! 91: iot = ia->ia_iot;
! 92: iobase = ia->ia_iobase;
! 93:
! 94: #ifdef KGDB
! 95: if (iobase == com_kgdb_addr)
! 96: goto out;
! 97: #endif
! 98: if (iobase == comconsaddr && !comconsattached)
! 99: goto out;
! 100:
! 101: if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh))
! 102: return (0);
! 103:
! 104: rv = comprobe1(iot, ioh);
! 105:
! 106: bus_space_unmap(iot, ioh, COM_NPORTS);
! 107:
! 108: if (rv == 0)
! 109: return (0);
! 110:
! 111: out:
! 112: ia->ia_iosize = COM_NPORTS;
! 113: ia->ia_msize = 0;
! 114: return (1);
! 115: }
! 116:
! 117: void
! 118: com_isa_attach(struct device *parent, struct device *self, void *aux)
! 119: {
! 120: struct com_softc *sc = (struct com_softc *)self;
! 121: struct isa_attach_args *ia = aux;
! 122: bus_space_handle_t ioh;
! 123: bus_space_tag_t iot;
! 124: int iobase, irq;
! 125:
! 126: sc->sc_hwflags = 0;
! 127: sc->sc_swflags = 0;
! 128:
! 129: iobase = ia->ia_iobase;
! 130: iot = ia->ia_iot;
! 131:
! 132: #ifdef KGBD
! 133: if ((iobase != comconsaddr) &&
! 134: (iobase != com_kgdb_addr)) {
! 135: #else
! 136: if (iobase != comconsaddr) {
! 137: #endif
! 138: if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh))
! 139: panic("com_isa_attach: mapping failed");
! 140: } else {
! 141: #ifdef KGDB
! 142: if (iobase == comconsaddr)
! 143: ioh = comconsioh;
! 144: else
! 145: ioh = com_kgdb_ioh;
! 146: #else
! 147: ioh = comconsioh;
! 148: #endif
! 149: }
! 150:
! 151: sc->sc_iot = iot;
! 152: sc->sc_ioh = ioh;
! 153: sc->sc_iobase = iobase;
! 154: sc->sc_frequency = COM_FREQ;
! 155:
! 156: com_attach_subr(sc);
! 157:
! 158: irq = ia->ia_irq;
! 159: if (irq != IRQUNK) {
! 160: #ifdef KGDB
! 161: if (iobase == com_kgdb_addr) {
! 162: sc->sc_ih = isa_intr_establish(ia->ia_ic, irq,
! 163: IST_EDGE, IPL_HIGH, kgdbintr, sc,
! 164: sc->sc_dev.dv_xname);
! 165: } else {
! 166: sc->sc_ih = isa_intr_establish(ia->ia_ic, irq,
! 167: IST_EDGE, IPL_TTY, comintr, sc,
! 168: sc->sc_dev.dv_xname);
! 169: }
! 170: #else
! 171: sc->sc_ih = isa_intr_establish(ia->ia_ic, irq,
! 172: IST_EDGE, IPL_TTY, comintr, sc,
! 173: sc->sc_dev.dv_xname);
! 174: #endif /* KGDB */
! 175: }
! 176: }
! 177:
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