boca.c revision 1.39
1 /* $NetBSD: boca.c,v 1.39 2002/10/02 03:10:46 thorpej 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 1.39 2002/10/02 03:10:46 thorpej 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 CFATTACH_DECL(boca, sizeof(struct boca_softc), 77 bocaprobe, bocaattach, NULL, NULL); 78 79 int 80 bocaprobe(parent, self, aux) 81 struct device *parent; 82 struct cfdata *self; 83 void *aux; 84 { 85 struct isa_attach_args *ia = aux; 86 bus_space_tag_t iot = ia->ia_iot; 87 bus_space_handle_t ioh; 88 int i, iobase, 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 (ia->ia_nio < 1) 98 return (0); 99 if (ia->ia_nirq < 1) 100 return (0); 101 102 if (ISA_DIRECT_CONFIG(ia)) 103 return (0); 104 105 /* Disallow wildcarded i/o address. */ 106 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 107 return (0); 108 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 109 return (0); 110 111 /* if the first port is in use as console, then it. */ 112 if (com_is_console(iot, iobase, 0)) 113 goto checkmappings; 114 115 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 116 rv = 0; 117 goto out; 118 } 119 rv = comprobe1(iot, ioh); 120 bus_space_unmap(iot, ioh, COM_NPORTS); 121 if (rv == 0) 122 goto out; 123 124 checkmappings: 125 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 126 iobase += COM_NPORTS; 127 128 if (com_is_console(iot, iobase, 0)) 129 continue; 130 131 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 132 rv = 0; 133 goto out; 134 } 135 bus_space_unmap(iot, ioh, COM_NPORTS); 136 } 137 138 out: 139 if (rv) { 140 ia->ia_nio = 1; 141 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 142 143 ia->ia_nirq = 1; 144 145 ia->ia_niomem = 0; 146 ia->ia_ndrq = 0; 147 } 148 return (rv); 149 } 150 151 int 152 bocaprint(aux, pnp) 153 void *aux; 154 const char *pnp; 155 { 156 struct commulti_attach_args *ca = aux; 157 158 if (pnp) 159 printf("com at %s", pnp); 160 printf(" slave %d", ca->ca_slave); 161 return (UNCONF); 162 } 163 164 void 165 bocaattach(parent, self, aux) 166 struct device *parent, *self; 167 void *aux; 168 { 169 struct boca_softc *sc = (void *)self; 170 struct isa_attach_args *ia = aux; 171 struct commulti_attach_args ca; 172 bus_space_tag_t iot = ia->ia_iot; 173 int i, iobase; 174 175 printf("\n"); 176 177 sc->sc_iot = ia->ia_iot; 178 sc->sc_iobase = ia->ia_io[0].ir_addr; 179 180 for (i = 0; i < NSLAVES; i++) { 181 iobase = sc->sc_iobase + i * COM_NPORTS; 182 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 183 bus_space_map(iot, iobase, COM_NPORTS, 0, 184 &sc->sc_slaveioh[i])) { 185 printf("%s: can't map i/o space for slave %d\n", 186 sc->sc_dev.dv_xname, i); 187 return; 188 } 189 } 190 191 for (i = 0; i < NSLAVES; i++) { 192 193 ca.ca_slave = i; 194 ca.ca_iot = sc->sc_iot; 195 ca.ca_ioh = sc->sc_slaveioh[i]; 196 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 197 ca.ca_noien = 0; 198 199 sc->sc_slaves[i] = config_found(self, &ca, bocaprint); 200 if (sc->sc_slaves[i] != NULL) 201 sc->sc_alive |= 1 << i; 202 } 203 204 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 205 IST_EDGE, IPL_SERIAL, bocaintr, sc); 206 callout_init(&sc->fixup); 207 callout_reset(&sc->fixup, hz/10, boca_fixup, sc); 208 } 209 210 int 211 bocaintr(arg) 212 void *arg; 213 { 214 struct boca_softc *sc = arg; 215 bus_space_tag_t iot = sc->sc_iot; 216 int alive = sc->sc_alive; 217 int bits; 218 219 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], com_scratch) & alive; 220 if (bits == 0) 221 return (0); 222 223 for (;;) { 224 #define TRY(n) \ 225 if (bits & (1 << (n))) { \ 226 if (comintr(sc->sc_slaves[n]) == 0) { \ 227 printf("%s: bogus intr for port %d\n", \ 228 sc->sc_dev.dv_xname, n); \ 229 } \ 230 } 231 TRY(0); 232 TRY(1); 233 TRY(2); 234 TRY(3); 235 TRY(4); 236 TRY(5); 237 TRY(6); 238 TRY(7); 239 #undef TRY 240 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], 241 com_scratch) & alive; 242 if (bits == 0) { 243 return (1); 244 } 245 } 246 } 247 248 void 249 boca_fixup(v) 250 void *v; 251 { 252 struct boca_softc *sc = v; 253 int alive = sc->sc_alive; 254 int i, s; 255 256 s = splserial(); 257 258 for (i = 0; i < 8; i++) { 259 if (alive & (1 << (i))) 260 comintr(sc->sc_slaves[i]); 261 } 262 callout_reset(&sc->fixup, hz/10, boca_fixup, sc); 263 splx(s); 264 } 265
Indexes created Mon Sep 29 03:10:08 GMT 2025