1 /* $NetBSD: moxa_isa.c,v 1.16 2008/04/08 20:08:50 cegger 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 1.16 2008/04/08 20:08:50 cegger 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 <sys/bus.h> 45 #include <sys/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(struct device *, struct cfdata *, void *); 68 void moxa_isaattach(struct device *, struct device *, void *); 69 int moxa_isaintr(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(struct device *parent, struct cfdata *self, 76 void *aux) 77 { 78 struct isa_attach_args *ia = aux; 79 bus_space_tag_t iot = ia->ia_iot; 80 bus_space_handle_t ioh; 81 int i, iobase, rv = 1; 82 83 /* 84 * Do the normal com probe for the first UART and assume 85 * its presence, and the ability to map the other UARTS, 86 * means there is a multiport board there. 87 * XXX Needs more robustness. 88 */ 89 90 if (ia->ia_nio < 1) 91 return (0); 92 if (ia->ia_nirq < 1) 93 return (0); 94 95 if (ISA_DIRECT_CONFIG(ia)) 96 return (0); 97 98 /* Disallow wildcarded i/o address. */ 99 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 100 return (0); 101 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 102 return (0); 103 104 /* if the first port is in use as console, then it. */ 105 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 106 goto checkmappings; 107 108 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 109 rv = 0; 110 goto out; 111 } 112 rv = comprobe1(iot, ioh); 113 bus_space_unmap(iot, ioh, COM_NPORTS); 114 if (rv == 0) 115 goto out; 116 117 checkmappings: 118 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 119 iobase += COM_NPORTS; 120 121 if (com_is_console(iot, iobase, 0)) 122 continue; 123 124 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 125 rv = 0; 126 goto out; 127 } 128 bus_space_unmap(iot, ioh, COM_NPORTS); 129 } 130 131 out: 132 if (rv) { 133 ia->ia_nio = 1; 134 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 135 136 ia->ia_nirq = 1; 137 138 ia->ia_niomem = 0; 139 ia->ia_ndrq = 0; 140 } 141 return (rv); 142 } 143 144 void 145 moxa_isaattach(struct device *parent, struct device *self, void *aux) 146 { 147 struct moxa_isa_softc *sc = (void *)self; 148 struct isa_attach_args *ia = aux; 149 struct commulti_attach_args ca; 150 bus_space_tag_t iot = ia->ia_iot; 151 int i, iobase; 152 153 printf("\n"); 154 155 sc->sc_iot = ia->ia_iot; 156 sc->sc_iobase = ia->ia_io[0].ir_addr; 157 158 for (i = 0; i < NSLAVES; i++) { 159 iobase = sc->sc_iobase + i * COM_NPORTS; 160 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 161 bus_space_map(iot, iobase, COM_NPORTS, 0, 162 &sc->sc_slaveioh[i])) { 163 aprint_error_dev(&sc->sc_dev, "can't map i/o space for slave %d\n", i); 164 return; 165 } 166 } 167 168 for (i = 0; i < NSLAVES; i++) { 169 ca.ca_slave = i; 170 ca.ca_iot = sc->sc_iot; 171 ca.ca_ioh = sc->sc_slaveioh[i]; 172 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 173 ca.ca_noien = 1; 174 175 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 176 if (sc->sc_slaves[i] != NULL) 177 sc->sc_alive |= 1 << i; 178 } 179 180 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 181 IST_EDGE, IPL_SERIAL, moxa_isaintr, sc); 182 } 183 184 int 185 moxa_isaintr(arg) 186 void *arg; 187 { 188 struct moxa_isa_softc *sc = arg; 189 int bits; 190 int rv = 0; 191 192 bits = sc->sc_alive; 193 if (bits == 0) 194 return (0); 195 196 for (;;rv = 0) { 197 #define TRY(n) \ 198 if (bits & (1 << (n))) \ 199 rv += comintr(sc->sc_slaves[n]); 200 TRY(0); 201 TRY(1); 202 TRY(2); 203 TRY(3); 204 TRY(4); 205 TRY(5); 206 TRY(6); 207 TRY(7); 208 #undef TRY 209 if (rv == 0) 210 return (1); 211 } 212 } 213