1 /* $NetBSD: moxa_isa.c,v 1.6 2002/10/02 03:10:49 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. 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: moxa_isa.c,v 1.6 2002/10/02 03:10:49 thorpej Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 #include <sys/termios.h> 43 44 #include <machine/bus.h> 45 #include <machine/intr.h> 46 47 #include <dev/ic/comreg.h> 48 #include <dev/ic/comvar.h> 49 50 #include <dev/isa/isavar.h> 51 #include <dev/isa/com_multi.h> 52 53 #define NSLAVES 8 54 55 struct moxa_isa_softc { 56 struct device sc_dev; 57 void *sc_ih; 58 59 bus_space_tag_t sc_iot; 60 int sc_iobase; 61 62 int sc_alive; /* mask of slave units attached */ 63 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 64 bus_space_handle_t sc_slaveioh[NSLAVES]; 65 }; 66 67 int moxa_isaprobe __P((struct device *, struct cfdata *, void *)); 68 void moxa_isaattach __P((struct device *, struct device *, void *)); 69 int moxa_isaintr __P((void *)); 70 int moxa_isaprint __P((void *, const char *)); 71 72 CFATTACH_DECL(moxa_isa, sizeof(struct moxa_isa_softc), 73 moxa_isaprobe, moxa_isaattach, NULL, NULL); 74 75 int 76 moxa_isaprobe(parent, self, aux) 77 struct device *parent; 78 struct cfdata *self; 79 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 == ISACF_PORT_DEFAULT) 103 return (0); 104 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 105 return (0); 106 107 /* if the first port is in use as console, then it. */ 108 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 109 goto checkmappings; 110 111 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 112 rv = 0; 113 goto out; 114 } 115 rv = comprobe1(iot, ioh); 116 bus_space_unmap(iot, ioh, COM_NPORTS); 117 if (rv == 0) 118 goto out; 119 120 checkmappings: 121 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 122 iobase += COM_NPORTS; 123 124 if (com_is_console(iot, iobase, 0)) 125 continue; 126 127 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 128 rv = 0; 129 goto out; 130 } 131 bus_space_unmap(iot, ioh, COM_NPORTS); 132 } 133 134 out: 135 if (rv) { 136 ia->ia_nio = 1; 137 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 138 139 ia->ia_nirq = 1; 140 141 ia->ia_niomem = 0; 142 ia->ia_ndrq = 0; 143 } 144 return (rv); 145 } 146 147 int 148 moxa_isaprint(aux, pnp) 149 void *aux; 150 const char *pnp; 151 { 152 struct commulti_attach_args *ca = aux; 153 154 if (pnp) 155 printf("com at %s", pnp); 156 printf(" slave %d", ca->ca_slave); 157 return (UNCONF); 158 } 159 160 void 161 moxa_isaattach(parent, self, aux) 162 struct device *parent, *self; 163 void *aux; 164 { 165 struct moxa_isa_softc *sc = (void *)self; 166 struct isa_attach_args *ia = aux; 167 struct commulti_attach_args ca; 168 bus_space_tag_t iot = ia->ia_iot; 169 int i, iobase; 170 171 printf("\n"); 172 173 sc->sc_iot = ia->ia_iot; 174 sc->sc_iobase = ia->ia_io[0].ir_addr; 175 176 for (i = 0; i < NSLAVES; i++) { 177 iobase = sc->sc_iobase + i * COM_NPORTS; 178 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 179 bus_space_map(iot, iobase, COM_NPORTS, 0, 180 &sc->sc_slaveioh[i])) { 181 printf("%s: can't map i/o space for slave %d\n", 182 sc->sc_dev.dv_xname, i); 183 return; 184 } 185 } 186 187 for (i = 0; i < NSLAVES; i++) { 188 ca.ca_slave = i; 189 ca.ca_iot = sc->sc_iot; 190 ca.ca_ioh = sc->sc_slaveioh[i]; 191 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 192 ca.ca_noien = 1; 193 194 sc->sc_slaves[i] = config_found(self, &ca, moxa_isaprint); 195 if (sc->sc_slaves[i] != NULL) 196 sc->sc_alive |= 1 << i; 197 } 198 199 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 200 IST_EDGE, IPL_SERIAL, moxa_isaintr, sc); 201 } 202 203 int 204 moxa_isaintr(arg) 205 void *arg; 206 { 207 struct moxa_isa_softc *sc = arg; 208 int bits; 209 int rv; 210 211 bits = sc->sc_alive; 212 if (bits == 0) 213 return (0); 214 215 for (;;rv = 0) { 216 #define TRY(n) \ 217 if (bits & (1 << (n))) \ 218 rv += comintr(sc->sc_slaves[n]); 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 if (rv == 0) 229 return (1); 230 } 231 } 232