1 /* $NetBSD: rtfps.c,v 1.35 1997/10/20 18:43:19 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 5 * Copyright (c) 1995 Charles 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 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/param.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 #include <sys/termios.h> 40 41 #include <machine/bus.h> 42 #include <machine/intr.h> 43 44 #include <dev/ic/comreg.h> 45 #include <dev/ic/comvar.h> 46 47 #include <dev/isa/isavar.h> 48 #include <dev/isa/com_multi.h> 49 50 #define NSLAVES 4 51 52 struct rtfps_softc { 53 struct device sc_dev; 54 void *sc_ih; 55 56 bus_space_tag_t sc_iot; 57 int sc_iobase; 58 int sc_irqport; 59 bus_space_handle_t sc_irqioh; 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 rtfpsprobe __P((struct device *, void *, void *)); 67 void rtfpsattach __P((struct device *, struct device *, void *)); 68 int rtfpsintr __P((void *)); 69 int rtfpsprint __P((void *, const char *)); 70 71 struct cfattach rtfps_ca = { 72 sizeof(struct rtfps_softc), rtfpsprobe, rtfpsattach 73 }; 74 75 struct cfdriver rtfps_cd = { 76 NULL, "rtfps", DV_TTY 77 }; 78 79 int 80 rtfpsprobe(parent, self, aux) 81 struct device *parent; 82 void *self; 83 void *aux; 84 { 85 struct isa_attach_args *ia = aux; 86 int iobase = ia->ia_iobase; 87 bus_space_tag_t iot = ia->ia_iot; 88 bus_space_handle_t ioh; 89 int i, rv = 1; 90 91 /* 92 * Do the normal com probe for the first UART and assume 93 * its presence, and the ability to map the other UARTS, 94 * means there is a multiport board there. 95 * XXX Needs more robustness. 96 */ 97 98 /* Disallow wildcarded i/o address. */ 99 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 100 return (0); 101 102 /* if the first port is in use as console, then it. */ 103 if (com_is_console(iot, iobase, 0)) 104 goto checkmappings; 105 106 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 107 rv = 0; 108 goto out; 109 } 110 rv = comprobe1(iot, ioh, iobase); 111 bus_space_unmap(iot, ioh, COM_NPORTS); 112 if (rv == 0) 113 goto out; 114 115 checkmappings: 116 for (i = 1; 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_iosize = NSLAVES * COM_NPORTS; 132 return (rv); 133 } 134 135 int 136 rtfpsprint(aux, pnp) 137 void *aux; 138 const char *pnp; 139 { 140 struct commulti_attach_args *ca = aux; 141 142 if (pnp) 143 printf("com at %s", pnp); 144 printf(" slave %d", ca->ca_slave); 145 return (UNCONF); 146 } 147 148 void 149 rtfpsattach(parent, self, aux) 150 struct device *parent, *self; 151 void *aux; 152 { 153 struct rtfps_softc *sc = (void *)self; 154 struct isa_attach_args *ia = aux; 155 struct commulti_attach_args ca; 156 static int irqport[] = { 157 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK, 158 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK, 159 IOBASEUNK, 0x2f2, 0x6f2, 0x6f3, 160 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK 161 }; 162 bus_space_tag_t iot = ia->ia_iot; 163 int i, iobase; 164 165 printf("\n"); 166 167 sc->sc_iot = ia->ia_iot; 168 sc->sc_iobase = ia->ia_iobase; 169 170 if (ia->ia_irq >= 16 || irqport[ia->ia_irq] == IOBASEUNK) { 171 printf("%s: invalid irq\n", sc->sc_dev.dv_xname); 172 return; 173 } 174 sc->sc_irqport = irqport[ia->ia_irq]; 175 176 for (i = 0; i < NSLAVES; i++) { 177 iobase = sc->sc_iobase + i * COM_NPORTS; 178 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 179 bus_space_map(iot, iobase, COM_NPORTS, 0, 180 &sc->sc_slaveioh[i])) { 181 printf("%s: can't map i/o space for slave %d\n", 182 sc->sc_dev.dv_xname, i); 183 return; 184 } 185 } 186 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) { 187 printf("%s: can't map irq port at 0x%x\n", sc->sc_dev.dv_xname, 188 sc->sc_irqport); 189 return; 190 } 191 192 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 193 194 for (i = 0; i < NSLAVES; i++) { 195 ca.ca_slave = i; 196 ca.ca_iot = sc->sc_iot; 197 ca.ca_ioh = sc->sc_slaveioh[i]; 198 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 199 ca.ca_noien = 0; 200 201 sc->sc_slaves[i] = config_found(self, &ca, rtfpsprint); 202 if (sc->sc_slaves[i] != NULL) 203 sc->sc_alive |= 1 << i; 204 } 205 206 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 207 IPL_SERIAL, rtfpsintr, sc); 208 } 209 210 int 211 rtfpsintr(arg) 212 void *arg; 213 { 214 struct rtfps_softc *sc = arg; 215 bus_space_tag_t iot = sc->sc_iot; 216 int alive = sc->sc_alive; 217 218 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 219 220 #define TRY(n) \ 221 if (alive & (1 << (n))) \ 222 comintr(sc->sc_slaves[n]); 223 TRY(0); 224 TRY(1); 225 TRY(2); 226 TRY(3); 227 #undef TRY 228 229 return (1); 230 } 231