1 /* $NetBSD: boca.c,v 1.35 2001/11/13 08:01:10 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 5 * Copyright (c) 1995 Charles M. Hannum. All rights reserved. 6 * 7 * This code is derived from public-domain software written by 8 * Roland McGrath, and information provided by David Muir Sharnoff. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Charles M. Hannum. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: boca.c,v 1.35 2001/11/13 08:01:10 lukem Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 #include <sys/termios.h> 43 #include <sys/kernel.h> 44 #include <sys/callout.h> 45 46 #include <machine/bus.h> 47 #include <machine/intr.h> 48 49 #include <dev/ic/comreg.h> 50 #include <dev/ic/comvar.h> 51 52 #include <dev/isa/isavar.h> 53 #include <dev/isa/com_multi.h> 54 55 #define NSLAVES 8 56 57 struct boca_softc { 58 struct device sc_dev; 59 void *sc_ih; 60 61 bus_space_tag_t sc_iot; 62 int sc_iobase; 63 64 int sc_alive; /* mask of slave units attached */ 65 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 66 bus_space_handle_t sc_slaveioh[NSLAVES]; 67 struct callout fixup; 68 }; 69 70 int bocaprobe __P((struct device *, struct cfdata *, void *)); 71 void bocaattach __P((struct device *, struct device *, void *)); 72 int bocaintr __P((void *)); 73 void boca_fixup __P((void *)); 74 int bocaprint __P((void *, const char *)); 75 76 struct cfattach boca_ca = { 77 sizeof(struct boca_softc), bocaprobe, bocaattach, 78 }; 79 80 int 81 bocaprobe(parent, self, aux) 82 struct device *parent; 83 struct cfdata *self; 84 void *aux; 85 { 86 struct isa_attach_args *ia = aux; 87 int iobase = ia->ia_iobase; 88 bus_space_tag_t iot = ia->ia_iot; 89 bus_space_handle_t ioh; 90 int i, rv = 1; 91 92 /* 93 * Do the normal com probe for the first UART and assume 94 * its presence, and the ability to map the other UARTS, 95 * means there is a multiport board there. 96 * XXX Needs more robustness. 97 */ 98 99 /* Disallow wildcarded i/o address. */ 100 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 101 return (0); 102 103 /* if the first port is in use as console, then it. */ 104 if (com_is_console(iot, iobase, 0)) 105 goto checkmappings; 106 107 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 108 rv = 0; 109 goto out; 110 } 111 rv = comprobe1(iot, ioh); 112 bus_space_unmap(iot, ioh, COM_NPORTS); 113 if (rv == 0) 114 goto out; 115 116 checkmappings: 117 for (i = 1; i < NSLAVES; i++) { 118 iobase += COM_NPORTS; 119 120 if (com_is_console(iot, iobase, 0)) 121 continue; 122 123 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 124 rv = 0; 125 goto out; 126 } 127 bus_space_unmap(iot, ioh, COM_NPORTS); 128 } 129 130 out: 131 if (rv) 132 ia->ia_iosize = NSLAVES * COM_NPORTS; 133 return (rv); 134 } 135 136 int 137 bocaprint(aux, pnp) 138 void *aux; 139 const char *pnp; 140 { 141 struct commulti_attach_args *ca = aux; 142 143 if (pnp) 144 printf("com at %s", pnp); 145 printf(" slave %d", ca->ca_slave); 146 return (UNCONF); 147 } 148 149 void 150 bocaattach(parent, self, aux) 151 struct device *parent, *self; 152 void *aux; 153 { 154 struct boca_softc *sc = (void *)self; 155 struct isa_attach_args *ia = aux; 156 struct commulti_attach_args ca; 157 bus_space_tag_t iot = ia->ia_iot; 158 int i, iobase; 159 160 printf("\n"); 161 162 sc->sc_iot = ia->ia_iot; 163 sc->sc_iobase = ia->ia_iobase; 164 165 for (i = 0; i < NSLAVES; i++) { 166 iobase = sc->sc_iobase + i * COM_NPORTS; 167 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 168 bus_space_map(iot, iobase, COM_NPORTS, 0, 169 &sc->sc_slaveioh[i])) { 170 printf("%s: can't map i/o space for slave %d\n", 171 sc->sc_dev.dv_xname, i); 172 return; 173 } 174 } 175 176 for (i = 0; i < NSLAVES; i++) { 177 178 ca.ca_slave = i; 179 ca.ca_iot = sc->sc_iot; 180 ca.ca_ioh = sc->sc_slaveioh[i]; 181 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 182 ca.ca_noien = 0; 183 184 sc->sc_slaves[i] = config_found(self, &ca, bocaprint); 185 if (sc->sc_slaves[i] != NULL) 186 sc->sc_alive |= 1 << i; 187 } 188 189 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 190 IPL_SERIAL, bocaintr, sc); 191 callout_init(&sc->fixup); 192 callout_reset(&sc->fixup, hz/10, boca_fixup, sc); 193 } 194 195 int 196 bocaintr(arg) 197 void *arg; 198 { 199 struct boca_softc *sc = arg; 200 bus_space_tag_t iot = sc->sc_iot; 201 int alive = sc->sc_alive; 202 int bits; 203 204 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], com_scratch) & alive; 205 if (bits == 0) 206 return (0); 207 208 for (;;) { 209 #define TRY(n) \ 210 if (bits & (1 << (n))) { \ 211 if (comintr(sc->sc_slaves[n]) == 0) { \ 212 printf("%s: bogus intr for port %d\n", \ 213 sc->sc_dev.dv_xname, n); \ 214 } \ 215 } 216 TRY(0); 217 TRY(1); 218 TRY(2); 219 TRY(3); 220 TRY(4); 221 TRY(5); 222 TRY(6); 223 TRY(7); 224 #undef TRY 225 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], 226 com_scratch) & alive; 227 if (bits == 0) { 228 return (1); 229 } 230 } 231 } 232 233 void 234 boca_fixup(v) 235 void *v; 236 { 237 struct boca_softc *sc = v; 238 int alive = sc->sc_alive; 239 int i, s; 240 241 s = splserial(); 242 243 for (i = 0; i < 8; i++) { 244 if (alive & (1 << (i))) 245 comintr(sc->sc_slaves[i]); 246 } 247 callout_reset(&sc->fixup, hz/10, boca_fixup, sc); 248 splx(s); 249 } 250