1 /* $NetBSD: boca.c,v 1.57 2021/08/07 16:19:12 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 1.57 2021/08/07 16:19:12 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 <sys/bus.h> 47 #include <sys/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 device_t 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 callout_t fixup; 68 }; 69 70 int bocaprobe(device_t, cfdata_t, void *); 71 void bocaattach(device_t, device_t, void *); 72 int bocaintr(void *); 73 void boca_fixup(void *); 74 75 CFATTACH_DECL_NEW(boca, sizeof(struct boca_softc), 76 bocaprobe, bocaattach, NULL, NULL); 77 78 int 79 bocaprobe(device_t parent, cfdata_t self, void *aux) 80 { 81 struct isa_attach_args *ia = aux; 82 bus_space_tag_t iot = ia->ia_iot; 83 bus_space_handle_t ioh; 84 int i, iobase, rv = 1; 85 86 /* 87 * Do the normal com probe for the first UART and assume 88 * its presence, and the ability to map the other UARTS, 89 * means there is a multiport board there. 90 * XXX Needs more robustness. 91 */ 92 93 if (ia->ia_nio < 1) 94 return (0); 95 if (ia->ia_nirq < 1) 96 return (0); 97 98 if (ISA_DIRECT_CONFIG(ia)) 99 return (0); 100 101 /* Disallow wildcarded i/o address. */ 102 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 103 return (0); 104 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 105 return (0); 106 107 iobase = ia->ia_io[0].ir_addr; 108 109 /* if the first port is in use as console, then it. */ 110 if (com_is_console(iot, iobase, 0)) 111 goto checkmappings; 112 113 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 114 rv = 0; 115 goto out; 116 } 117 rv = comprobe1(iot, ioh); 118 bus_space_unmap(iot, ioh, COM_NPORTS); 119 if (rv == 0) 120 goto out; 121 122 checkmappings: 123 for (i = 1; i < NSLAVES; i++) { 124 iobase += COM_NPORTS; 125 126 if (com_is_console(iot, iobase, 0)) 127 continue; 128 129 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 130 rv = 0; 131 goto out; 132 } 133 bus_space_unmap(iot, ioh, COM_NPORTS); 134 } 135 136 out: 137 if (rv) { 138 ia->ia_nio = 1; 139 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 140 141 ia->ia_nirq = 1; 142 143 ia->ia_niomem = 0; 144 ia->ia_ndrq = 0; 145 } 146 return (rv); 147 } 148 149 void 150 bocaattach(device_t parent, device_t self, void *aux) 151 { 152 struct boca_softc *sc = device_private(self); 153 struct isa_attach_args *ia = aux; 154 struct commulti_attach_args ca; 155 bus_space_tag_t iot = ia->ia_iot; 156 int i, iobase; 157 158 printf("\n"); 159 160 sc->sc_dev = self; 161 sc->sc_iot = ia->ia_iot; 162 sc->sc_iobase = ia->ia_io[0].ir_addr; 163 164 for (i = 0; i < NSLAVES; i++) { 165 iobase = sc->sc_iobase + i * COM_NPORTS; 166 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 167 bus_space_map(iot, iobase, COM_NPORTS, 0, 168 &sc->sc_slaveioh[i])) { 169 aprint_error_dev(sc->sc_dev, 170 "can't map i/o space for slave %d\n", i); 171 return; 172 } 173 } 174 175 for (i = 0; i < NSLAVES; i++) { 176 177 ca.ca_slave = i; 178 ca.ca_iot = sc->sc_iot; 179 ca.ca_ioh = sc->sc_slaveioh[i]; 180 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 181 ca.ca_noien = 0; 182 183 sc->sc_slaves[i] = config_found(self, &ca, commultiprint, 184 CFARGS_NONE); 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[0].ir_irq, 190 IST_EDGE, IPL_SERIAL, bocaintr, sc); 191 callout_init(&sc->fixup, 0); 192 callout_reset(&sc->fixup, hz/10, boca_fixup, sc); 193 } 194 195 int 196 bocaintr(void *arg) 197 { 198 struct boca_softc *sc = arg; 199 bus_space_tag_t iot = sc->sc_iot; 200 int alive = sc->sc_alive; 201 int bits; 202 203 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], com_scratch) & alive; 204 if (bits == 0) 205 return (0); 206 207 for (;;) { 208 #define TRY(n) \ 209 if (bits & (1 << (n))) { \ 210 if (comintr(sc->sc_slaves[n]) == 0) { \ 211 printf("%s: bogus intr for port %d\n", \ 212 device_xname(sc->sc_dev), n); \ 213 } \ 214 } 215 TRY(0); 216 TRY(1); 217 TRY(2); 218 TRY(3); 219 TRY(4); 220 TRY(5); 221 TRY(6); 222 TRY(7); 223 #undef TRY 224 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], 225 com_scratch) & alive; 226 if (bits == 0) { 227 return (1); 228 } 229 } 230 } 231 232 void 233 boca_fixup(void *v) 234 { 235 struct boca_softc *sc = v; 236 int alive = sc->sc_alive; 237 int i, s; 238 239 s = splserial(); 240 241 for (i = 0; i < 8; i++) { 242 if (alive & (1 << (i))) 243 comintr(sc->sc_slaves[i]); 244 } 245 callout_reset(&sc->fixup, hz/10, boca_fixup, sc); 246 splx(s); 247 } 248
Indexes created Sat Sep 20 22:09:52 GMT 2025