1 /* $NetBSD: moxa_isa.c,v 1.23 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. 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 1.23 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 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 void *sc_ih; 57 58 bus_space_tag_t sc_iot; 59 int sc_iobase; 60 61 int sc_alive; /* mask of slave units attached */ 62 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 63 bus_space_handle_t sc_slaveioh[NSLAVES]; 64 }; 65 66 int moxa_isaprobe(device_t, cfdata_t, void *); 67 void moxa_isaattach(device_t, device_t, void *); 68 int moxa_isaintr(void *); 69 70 CFATTACH_DECL_NEW(moxa_isa, sizeof(struct moxa_isa_softc), 71 moxa_isaprobe, moxa_isaattach, NULL, NULL); 72 73 int 74 moxa_isaprobe(device_t parent, cfdata_t self, void *aux) 75 { 76 struct isa_attach_args *ia = aux; 77 bus_space_tag_t iot = ia->ia_iot; 78 bus_space_handle_t ioh; 79 int i, iobase, rv = 1; 80 81 /* 82 * Do the normal com probe for the first UART and assume 83 * its presence, and the ability to map the other UARTS, 84 * means there is a multiport board there. 85 * XXX Needs more robustness. 86 */ 87 88 if (ia->ia_nio < 1) 89 return (0); 90 if (ia->ia_nirq < 1) 91 return (0); 92 93 if (ISA_DIRECT_CONFIG(ia)) 94 return (0); 95 96 /* Disallow wildcarded i/o address. */ 97 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 98 return (0); 99 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 100 return (0); 101 102 /* if the first port is in use as console, then it. */ 103 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 104 goto checkmappings; 105 106 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 107 rv = 0; 108 goto out; 109 } 110 rv = comprobe1(iot, ioh); 111 bus_space_unmap(iot, ioh, COM_NPORTS); 112 if (rv == 0) 113 goto out; 114 115 checkmappings: 116 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 117 iobase += COM_NPORTS; 118 119 if (com_is_console(iot, iobase, 0)) 120 continue; 121 122 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 123 rv = 0; 124 goto out; 125 } 126 bus_space_unmap(iot, ioh, COM_NPORTS); 127 } 128 129 out: 130 if (rv) { 131 ia->ia_nio = 1; 132 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 133 134 ia->ia_nirq = 1; 135 136 ia->ia_niomem = 0; 137 ia->ia_ndrq = 0; 138 } 139 return (rv); 140 } 141 142 void 143 moxa_isaattach(device_t parent, device_t self, void *aux) 144 { 145 struct moxa_isa_softc *sc = device_private(self); 146 struct isa_attach_args *ia = aux; 147 struct commulti_attach_args ca; 148 bus_space_tag_t iot = ia->ia_iot; 149 int i, iobase; 150 151 printf("\n"); 152 153 sc->sc_iot = ia->ia_iot; 154 sc->sc_iobase = ia->ia_io[0].ir_addr; 155 156 for (i = 0; i < NSLAVES; i++) { 157 iobase = sc->sc_iobase + i * COM_NPORTS; 158 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 159 bus_space_map(iot, iobase, COM_NPORTS, 0, 160 &sc->sc_slaveioh[i])) { 161 aprint_error_dev(self, 162 "can't map i/o space for slave %d\n", i); 163 return; 164 } 165 } 166 167 for (i = 0; i < NSLAVES; i++) { 168 ca.ca_slave = i; 169 ca.ca_iot = sc->sc_iot; 170 ca.ca_ioh = sc->sc_slaveioh[i]; 171 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 172 ca.ca_noien = 1; 173 174 sc->sc_slaves[i] = config_found(self, &ca, commultiprint, 175 CFARGS_NONE); 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(void *arg) 186 { 187 struct moxa_isa_softc *sc = arg; 188 int bits; 189 int rv = 0; 190 191 bits = sc->sc_alive; 192 if (bits == 0) 193 return (0); 194 195 for (;;rv = 0) { 196 #define TRY(n) \ 197 if (bits & (1 << (n))) \ 198 rv += comintr(sc->sc_slaves[n]); 199 TRY(0); 200 TRY(1); 201 TRY(2); 202 TRY(3); 203 TRY(4); 204 TRY(5); 205 TRY(6); 206 TRY(7); 207 #undef TRY 208 if (rv == 0) 209 return (1); 210 } 211 } 212
Indexes created Sat Sep 20 22:09:52 GMT 2025