moxa_isa.c revision 1.19
1 /* $NetBSD: moxa_isa.c,v 1.19 2009/05/12 09:10:15 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 1.19 2009/05/12 09:10:15 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(device_t, cfdata_t, void *); 68 void moxa_isaattach(device_t, device_t, 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(device_t parent, cfdata_t self, void *aux) 76 { 77 struct isa_attach_args *ia = aux; 78 bus_space_tag_t iot = ia->ia_iot; 79 bus_space_handle_t ioh; 80 int i, iobase, rv = 1; 81 82 /* 83 * Do the normal com probe for the first UART and assume 84 * its presence, and the ability to map the other UARTS, 85 * means there is a multiport board there. 86 * XXX Needs more robustness. 87 */ 88 89 if (ia->ia_nio < 1) 90 return (0); 91 if (ia->ia_nirq < 1) 92 return (0); 93 94 if (ISA_DIRECT_CONFIG(ia)) 95 return (0); 96 97 /* Disallow wildcarded i/o address. */ 98 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 99 return (0); 100 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 101 return (0); 102 103 /* if the first port is in use as console, then it. */ 104 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 105 goto checkmappings; 106 107 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 108 rv = 0; 109 goto out; 110 } 111 rv = comprobe1(iot, ioh); 112 bus_space_unmap(iot, ioh, COM_NPORTS); 113 if (rv == 0) 114 goto out; 115 116 checkmappings: 117 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 118 iobase += COM_NPORTS; 119 120 if (com_is_console(iot, iobase, 0)) 121 continue; 122 123 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 124 rv = 0; 125 goto out; 126 } 127 bus_space_unmap(iot, ioh, COM_NPORTS); 128 } 129 130 out: 131 if (rv) { 132 ia->ia_nio = 1; 133 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 134 135 ia->ia_nirq = 1; 136 137 ia->ia_niomem = 0; 138 ia->ia_ndrq = 0; 139 } 140 return (rv); 141 } 142 143 void 144 moxa_isaattach(device_t parent, device_t self, void *aux) 145 { 146 struct moxa_isa_softc *sc = (void *)self; 147 struct isa_attach_args *ia = aux; 148 struct commulti_attach_args ca; 149 bus_space_tag_t iot = ia->ia_iot; 150 int i, iobase; 151 152 printf("\n"); 153 154 sc->sc_iot = ia->ia_iot; 155 sc->sc_iobase = ia->ia_io[0].ir_addr; 156 157 for (i = 0; i < NSLAVES; i++) { 158 iobase = sc->sc_iobase + i * COM_NPORTS; 159 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 160 bus_space_map(iot, iobase, COM_NPORTS, 0, 161 &sc->sc_slaveioh[i])) { 162 aprint_error_dev(&sc->sc_dev, "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 if (sc->sc_slaves[i] != NULL) 176 sc->sc_alive |= 1 << i; 177 } 178 179 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 180 IST_EDGE, IPL_SERIAL, moxa_isaintr, sc); 181 } 182 183 int 184 moxa_isaintr(void *arg) 185 { 186 struct moxa_isa_softc *sc = arg; 187 int bits; 188 int rv = 0; 189 190 bits = sc->sc_alive; 191 if (bits == 0) 192 return (0); 193 194 for (;;rv = 0) { 195 #define TRY(n) \ 196 if (bits & (1 << (n))) \ 197 rv += comintr(sc->sc_slaves[n]); 198 TRY(0); 199 TRY(1); 200 TRY(2); 201 TRY(3); 202 TRY(4); 203 TRY(5); 204 TRY(6); 205 TRY(7); 206 #undef TRY 207 if (rv == 0) 208 return (1); 209 } 210 } 211
Indexes created Fri Sep 26 20:09:58 GMT 2025