Annotation of sys/dev/isa/rtfps.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: rtfps.c,v 1.19 2002/03/14 01:26:56 millert Exp $ */
! 2: /* $NetBSD: rtfps.c,v 1.27 1996/10/21 22:41:18 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
! 6: * Copyright (c) 1995 Charles Hannum. All rights reserved.
! 7: *
! 8: * This code is derived from public-domain software written by
! 9: * Roland McGrath.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed by Charles Hannum.
! 22: * 4. The name of the author may not be used to endorse or promote products
! 23: * derived from this software without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 26: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 27: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 28: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 29: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 30: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 31: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 32: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 33: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 34: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 35: */
! 36:
! 37: #include <sys/param.h>
! 38: #include <sys/systm.h>
! 39: #include <sys/device.h>
! 40: #include <sys/termios.h>
! 41:
! 42: #include <machine/bus.h>
! 43: #include <machine/intr.h>
! 44:
! 45: #include <dev/isa/isavar.h>
! 46: #include <dev/ic/comreg.h>
! 47: #include <dev/ic/comvar.h>
! 48:
! 49: #define NSLAVES 4
! 50:
! 51: struct rtfps_softc {
! 52: struct device sc_dev;
! 53: void *sc_ih;
! 54:
! 55: bus_space_tag_t sc_iot;
! 56: int sc_iobase;
! 57: int sc_irqport;
! 58: bus_space_handle_t sc_irqioh;
! 59:
! 60: int sc_alive; /* mask of slave units attached */
! 61: void *sc_slaves[NSLAVES]; /* com device unit numbers */
! 62: bus_space_handle_t sc_slaveioh[NSLAVES];
! 63: };
! 64:
! 65: int rtfpsprobe(struct device *, void *, void *);
! 66: void rtfpsattach(struct device *, struct device *, void *);
! 67: int rtfpsintr(void *);
! 68: int rtfpsprint(void *, const char *);
! 69:
! 70: struct cfattach rtfps_ca = {
! 71: sizeof(struct rtfps_softc), rtfpsprobe, rtfpsattach
! 72: };
! 73:
! 74: struct cfdriver rtfps_cd = {
! 75: NULL, "rtfps", DV_TTY
! 76: };
! 77:
! 78: int
! 79: rtfpsprobe(parent, self, aux)
! 80: struct device *parent;
! 81: void *self;
! 82: void *aux;
! 83: {
! 84: struct isa_attach_args *ia = aux;
! 85: int iobase = ia->ia_iobase;
! 86: bus_space_tag_t iot = ia->ia_iot;
! 87: bus_space_handle_t ioh;
! 88: int i, rv = 1;
! 89:
! 90: /*
! 91: * Do the normal com probe for the first UART and assume
! 92: * its presence, and the ability to map the other UARTS,
! 93: * means there is a multiport board there.
! 94: * XXX Needs more robustness.
! 95: */
! 96:
! 97: /* if the first port is in use as console, then it. */
! 98: if (iobase == comconsaddr && !comconsattached)
! 99: goto checkmappings;
! 100:
! 101: if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
! 102: rv = 0;
! 103: goto out;
! 104: }
! 105: rv = comprobe1(iot, ioh);
! 106: bus_space_unmap(iot, ioh, COM_NPORTS);
! 107: if (rv == 0)
! 108: goto out;
! 109:
! 110: checkmappings:
! 111: for (i = 1; i < NSLAVES; i++) {
! 112: iobase += COM_NPORTS;
! 113:
! 114: if (iobase == comconsaddr && !comconsattached)
! 115: continue;
! 116:
! 117: if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
! 118: rv = 0;
! 119: goto out;
! 120: }
! 121: bus_space_unmap(iot, ioh, COM_NPORTS);
! 122: }
! 123:
! 124: out:
! 125: if (rv)
! 126: ia->ia_iosize = NSLAVES * COM_NPORTS;
! 127: return (rv);
! 128: }
! 129:
! 130: int
! 131: rtfpsprint(aux, pnp)
! 132: void *aux;
! 133: const char *pnp;
! 134: {
! 135: struct commulti_attach_args *ca = aux;
! 136:
! 137: if (pnp)
! 138: printf("com at %s", pnp);
! 139: printf(" slave %d", ca->ca_slave);
! 140: return (UNCONF);
! 141: }
! 142:
! 143: void
! 144: rtfpsattach(parent, self, aux)
! 145: struct device *parent, *self;
! 146: void *aux;
! 147: {
! 148: struct rtfps_softc *sc = (void *)self;
! 149: struct isa_attach_args *ia = aux;
! 150: struct commulti_attach_args ca;
! 151: static int irqport[] = {
! 152: IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK,
! 153: IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK,
! 154: IOBASEUNK, 0x2f2, 0x6f2, 0x6f3,
! 155: IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK
! 156: };
! 157: bus_space_tag_t iot = ia->ia_iot;
! 158: int i;
! 159:
! 160: sc->sc_iot = ia->ia_iot;
! 161: sc->sc_iobase = ia->ia_iobase;
! 162:
! 163: if (ia->ia_irq >= 16 || irqport[ia->ia_irq] == IOBASEUNK)
! 164: panic("rtfpsattach: invalid irq");
! 165: sc->sc_irqport = irqport[ia->ia_irq];
! 166:
! 167: for (i = 0; i < NSLAVES; i++)
! 168: if (bus_space_map(iot, sc->sc_iobase + i * COM_NPORTS,
! 169: COM_NPORTS, 0, &sc->sc_slaveioh[i]))
! 170: panic("rtfpsattach: couldn't map slave %d", i);
! 171: if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh))
! 172: panic("rtfpsattach: couldn't map irq port at 0x%x",
! 173: sc->sc_irqport);
! 174:
! 175: bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
! 176:
! 177: printf("\n");
! 178:
! 179: for (i = 0; i < NSLAVES; i++) {
! 180: ca.ca_slave = i;
! 181: ca.ca_iot = sc->sc_iot;
! 182: ca.ca_ioh = sc->sc_slaveioh[i];
! 183: ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
! 184: ca.ca_noien = 0;
! 185:
! 186: sc->sc_slaves[i] = config_found(self, &ca, rtfpsprint);
! 187: if (sc->sc_slaves[i] != NULL)
! 188: sc->sc_alive |= 1 << i;
! 189: }
! 190:
! 191: sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
! 192: IPL_TTY, rtfpsintr, sc, sc->sc_dev.dv_xname);
! 193: }
! 194:
! 195: int
! 196: rtfpsintr(arg)
! 197: void *arg;
! 198: {
! 199: struct rtfps_softc *sc = arg;
! 200: bus_space_tag_t iot = sc->sc_iot;
! 201: int alive = sc->sc_alive;
! 202:
! 203: bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
! 204:
! 205: #define TRY(n) \
! 206: if (alive & (1 << (n))) \
! 207: comintr(sc->sc_slaves[n]);
! 208: TRY(0);
! 209: TRY(1);
! 210: TRY(2);
! 211: TRY(3);
! 212: #undef TRY
! 213:
! 214: return (1);
! 215: }
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