1 /* $NetBSD: rtfps.c,v 1.62 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: rtfps.c,v 1.62 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 4 54 55 struct rtfps_softc { 56 void *sc_ih; 57 58 bus_space_tag_t sc_iot; 59 int sc_iobase; 60 int sc_irqport; 61 bus_space_handle_t sc_irqioh; 62 63 int sc_alive; /* mask of slave units attached */ 64 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 65 bus_space_handle_t sc_slaveioh[NSLAVES]; 66 }; 67 68 int rtfpsprobe(device_t, cfdata_t, void *); 69 void rtfpsattach(device_t, device_t, void *); 70 int rtfpsintr(void *); 71 72 CFATTACH_DECL_NEW(rtfps, sizeof(struct rtfps_softc), 73 rtfpsprobe, rtfpsattach, NULL, NULL); 74 75 int 76 rtfpsprobe(device_t parent, cfdata_t self, 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 /* Disallow wildcarded i/o address. */ 96 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 97 return (0); 98 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 99 return (0); 100 101 /* if the first port is in use as console, then it. */ 102 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 103 goto checkmappings; 104 105 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 106 rv = 0; 107 goto out; 108 } 109 rv = comprobe1(iot, ioh); 110 bus_space_unmap(iot, ioh, COM_NPORTS); 111 if (rv == 0) 112 goto out; 113 114 checkmappings: 115 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 116 iobase += COM_NPORTS; 117 118 if (com_is_console(iot, iobase, 0)) 119 continue; 120 121 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 122 rv = 0; 123 goto out; 124 } 125 bus_space_unmap(iot, ioh, COM_NPORTS); 126 } 127 128 out: 129 if (rv) { 130 ia->ia_nio = 1; 131 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 132 133 ia->ia_nirq = 1; 134 135 ia->ia_niomem = 0; 136 ia->ia_ndrq = 0; 137 } 138 return (rv); 139 } 140 141 void 142 rtfpsattach(device_t parent, device_t self, void *aux) 143 { 144 struct rtfps_softc *sc = device_private(self); 145 struct isa_attach_args *ia = aux; 146 struct commulti_attach_args ca; 147 static int irqport[] = { 148 -1, -1, -1, -1, -1, -1, -1, -1, 149 -1, 0x2f2, 0x6f2, 0x6f3, -1, -1, -1, -1 150 }; 151 bus_space_tag_t iot = ia->ia_iot; 152 int i, iobase, irq; 153 154 aprint_naive("\n"); 155 aprint_normal("\n"); 156 157 sc->sc_iot = ia->ia_iot; 158 sc->sc_iobase = ia->ia_io[0].ir_addr; 159 irq = ia->ia_irq[0].ir_irq; 160 161 if (irq >= 16 || irqport[irq] == -1) { 162 aprint_error_dev(self, "invalid irq\n"); 163 return; 164 } 165 sc->sc_irqport = irqport[irq]; 166 167 for (i = 0; i < NSLAVES; i++) { 168 iobase = sc->sc_iobase + i * COM_NPORTS; 169 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 170 bus_space_map(iot, iobase, COM_NPORTS, 0, 171 &sc->sc_slaveioh[i])) { 172 aprint_error_dev(self, 173 "can't map i/o space for slave %d\n", i); 174 return; 175 } 176 } 177 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) { 178 aprint_error_dev(self, "can't map irq port at 0x%x\n", 179 sc->sc_irqport); 180 return; 181 } 182 183 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 184 185 for (i = 0; i < NSLAVES; i++) { 186 ca.ca_slave = i; 187 ca.ca_iot = sc->sc_iot; 188 ca.ca_ioh = sc->sc_slaveioh[i]; 189 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 190 ca.ca_noien = 0; 191 192 sc->sc_slaves[i] = config_found(self, &ca, commultiprint, 193 CFARGS_NONE); 194 if (sc->sc_slaves[i] != NULL) 195 sc->sc_alive |= 1 << i; 196 } 197 198 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, 199 IPL_SERIAL, rtfpsintr, sc); 200 } 201 202 int 203 rtfpsintr(void *arg) 204 { 205 struct rtfps_softc *sc = arg; 206 bus_space_tag_t iot = sc->sc_iot; 207 int alive = sc->sc_alive; 208 209 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 210 211 #define TRY(n) \ 212 if (alive & (1 << (n))) \ 213 comintr(sc->sc_slaves[n]); 214 TRY(0); 215 TRY(1); 216 TRY(2); 217 TRY(3); 218 #undef TRY 219 220 return (1); 221 } 222
Indexes created Sun Oct 25 00:26:45 UTC 2026