1 /* $NetBSD: boca.c,v 1.43 2004/09/14 20:20:46 drochner 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 1.43 2004/09/14 20:20:46 drochner 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 75 CFATTACH_DECL(boca, sizeof(struct boca_softc), 76 bocaprobe, bocaattach, NULL, NULL); 77 78 int 79 bocaprobe(parent, self, aux) 80 struct device *parent; 81 struct cfdata *self; 82 void *aux; 83 { 84 struct isa_attach_args *ia = aux; 85 bus_space_tag_t iot = ia->ia_iot; 86 bus_space_handle_t ioh; 87 int i, iobase, rv = 1; 88 89 /* 90 * Do the normal com probe for the first UART and assume 91 * its presence, and the ability to map the other UARTS, 92 * means there is a multiport board there. 93 * XXX Needs more robustness. 94 */ 95 96 if (ia->ia_nio < 1) 97 return (0); 98 if (ia->ia_nirq < 1) 99 return (0); 100 101 if (ISA_DIRECT_CONFIG(ia)) 102 return (0); 103 104 /* Disallow wildcarded i/o address. */ 105 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 106 return (0); 107 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 108 return (0); 109 110 iobase = ia->ia_io[0].ir_addr; 111 112 /* if the first port is in use as console, then it. */ 113 if (com_is_console(iot, iobase, 0)) 114 goto checkmappings; 115 116 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 117 rv = 0; 118 goto out; 119 } 120 rv = comprobe1(iot, ioh); 121 bus_space_unmap(iot, ioh, COM_NPORTS); 122 if (rv == 0) 123 goto out; 124 125 checkmappings: 126 for (i = 1; i < NSLAVES; i++) { 127 iobase += COM_NPORTS; 128 129 if (com_is_console(iot, iobase, 0)) 130 continue; 131 132 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 133 rv = 0; 134 goto out; 135 } 136 bus_space_unmap(iot, ioh, COM_NPORTS); 137 } 138 139 out: 140 if (rv) { 141 ia->ia_nio = 1; 142 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 143 144 ia->ia_nirq = 1; 145 146 ia->ia_niomem = 0; 147 ia->ia_ndrq = 0; 148 } 149 return (rv); 150 } 151 152 void 153 bocaattach(parent, self, aux) 154 struct device *parent, *self; 155 void *aux; 156 { 157 struct boca_softc *sc = (void *)self; 158 struct isa_attach_args *ia = aux; 159 struct commulti_attach_args ca; 160 bus_space_tag_t iot = ia->ia_iot; 161 int i, iobase; 162 163 printf("\n"); 164 165 sc->sc_iot = ia->ia_iot; 166 sc->sc_iobase = ia->ia_io[0].ir_addr; 167 168 for (i = 0; i < NSLAVES; i++) { 169 iobase = sc->sc_iobase + i * COM_NPORTS; 170 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 171 bus_space_map(iot, iobase, COM_NPORTS, 0, 172 &sc->sc_slaveioh[i])) { 173 printf("%s: can't map i/o space for slave %d\n", 174 sc->sc_dev.dv_xname, i); 175 return; 176 } 177 } 178 179 for (i = 0; i < NSLAVES; i++) { 180 181 ca.ca_slave = i; 182 ca.ca_iot = sc->sc_iot; 183 ca.ca_ioh = sc->sc_slaveioh[i]; 184 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 185 ca.ca_noien = 0; 186 187 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 188 if (sc->sc_slaves[i] != NULL) 189 sc->sc_alive |= 1 << i; 190 } 191 192 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 193 IST_EDGE, IPL_SERIAL, bocaintr, sc); 194 callout_init(&sc->fixup); 195 callout_reset(&sc->fixup, hz/10, boca_fixup, sc); 196 } 197 198 int 199 bocaintr(arg) 200 void *arg; 201 { 202 struct boca_softc *sc = arg; 203 bus_space_tag_t iot = sc->sc_iot; 204 int alive = sc->sc_alive; 205 int bits; 206 207 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], com_scratch) & alive; 208 if (bits == 0) 209 return (0); 210 211 for (;;) { 212 #define TRY(n) \ 213 if (bits & (1 << (n))) { \ 214 if (comintr(sc->sc_slaves[n]) == 0) { \ 215 printf("%s: bogus intr for port %d\n", \ 216 sc->sc_dev.dv_xname, n); \ 217 } \ 218 } 219 TRY(0); 220 TRY(1); 221 TRY(2); 222 TRY(3); 223 TRY(4); 224 TRY(5); 225 TRY(6); 226 TRY(7); 227 #undef TRY 228 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], 229 com_scratch) & alive; 230 if (bits == 0) { 231 return (1); 232 } 233 } 234 } 235 236 void 237 boca_fixup(v) 238 void *v; 239 { 240 struct boca_softc *sc = v; 241 int alive = sc->sc_alive; 242 int i, s; 243 244 s = splserial(); 245 246 for (i = 0; i < 8; i++) { 247 if (alive & (1 << (i))) 248 comintr(sc->sc_slaves[i]); 249 } 250 callout_reset(&sc->fixup, hz/10, boca_fixup, sc); 251 splx(s); 252 } 253