1 /* $NetBSD: moxa_isa.c,v 1.10 2004/09/14 20:20:48 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. 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 1.10 2004/09/14 20:20:48 drochner 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 71 CFATTACH_DECL(moxa_isa, sizeof(struct moxa_isa_softc), 72 moxa_isaprobe, moxa_isaattach, NULL, NULL); 73 74 int 75 moxa_isaprobe(parent, self, aux) 76 struct device *parent; 77 struct cfdata *self; 78 void *aux; 79 { 80 struct isa_attach_args *ia = aux; 81 bus_space_tag_t iot = ia->ia_iot; 82 bus_space_handle_t ioh; 83 int i, iobase, rv = 1; 84 85 /* 86 * Do the normal com probe for the first UART and assume 87 * its presence, and the ability to map the other UARTS, 88 * means there is a multiport board there. 89 * XXX Needs more robustness. 90 */ 91 92 if (ia->ia_nio < 1) 93 return (0); 94 if (ia->ia_nirq < 1) 95 return (0); 96 97 if (ISA_DIRECT_CONFIG(ia)) 98 return (0); 99 100 /* Disallow wildcarded i/o address. */ 101 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 102 return (0); 103 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 104 return (0); 105 106 /* if the first port is in use as console, then it. */ 107 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 108 goto checkmappings; 109 110 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 111 rv = 0; 112 goto out; 113 } 114 rv = comprobe1(iot, ioh); 115 bus_space_unmap(iot, ioh, COM_NPORTS); 116 if (rv == 0) 117 goto out; 118 119 checkmappings: 120 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 121 iobase += COM_NPORTS; 122 123 if (com_is_console(iot, iobase, 0)) 124 continue; 125 126 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 127 rv = 0; 128 goto out; 129 } 130 bus_space_unmap(iot, ioh, COM_NPORTS); 131 } 132 133 out: 134 if (rv) { 135 ia->ia_nio = 1; 136 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 137 138 ia->ia_nirq = 1; 139 140 ia->ia_niomem = 0; 141 ia->ia_ndrq = 0; 142 } 143 return (rv); 144 } 145 146 void 147 moxa_isaattach(parent, self, aux) 148 struct device *parent, *self; 149 void *aux; 150 { 151 struct moxa_isa_softc *sc = (void *)self; 152 struct isa_attach_args *ia = aux; 153 struct commulti_attach_args ca; 154 bus_space_tag_t iot = ia->ia_iot; 155 int i, iobase; 156 157 printf("\n"); 158 159 sc->sc_iot = ia->ia_iot; 160 sc->sc_iobase = ia->ia_io[0].ir_addr; 161 162 for (i = 0; i < NSLAVES; i++) { 163 iobase = sc->sc_iobase + i * COM_NPORTS; 164 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 165 bus_space_map(iot, iobase, COM_NPORTS, 0, 166 &sc->sc_slaveioh[i])) { 167 printf("%s: can't map i/o space for slave %d\n", 168 sc->sc_dev.dv_xname, i); 169 return; 170 } 171 } 172 173 for (i = 0; i < NSLAVES; i++) { 174 ca.ca_slave = i; 175 ca.ca_iot = sc->sc_iot; 176 ca.ca_ioh = sc->sc_slaveioh[i]; 177 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 178 ca.ca_noien = 1; 179 180 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 181 if (sc->sc_slaves[i] != NULL) 182 sc->sc_alive |= 1 << i; 183 } 184 185 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 186 IST_EDGE, IPL_SERIAL, moxa_isaintr, sc); 187 } 188 189 int 190 moxa_isaintr(arg) 191 void *arg; 192 { 193 struct moxa_isa_softc *sc = arg; 194 int bits; 195 int rv = 0; 196 197 bits = sc->sc_alive; 198 if (bits == 0) 199 return (0); 200 201 for (;;rv = 0) { 202 #define TRY(n) \ 203 if (bits & (1 << (n))) \ 204 rv += comintr(sc->sc_slaves[n]); 205 TRY(0); 206 TRY(1); 207 TRY(2); 208 TRY(3); 209 TRY(4); 210 TRY(5); 211 TRY(6); 212 TRY(7); 213 #undef TRY 214 if (rv == 0) 215 return (1); 216 } 217 } 218