1 /* $NetBSD: rtfps.c,v 1.28 1997/04/09 16:44:23 mycroft 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/isa/isavar.h> 45 #include <dev/isa/comreg.h> 46 #include <dev/isa/comvar.h> 47 #include <dev/isa/com_multi.h> 48 49 #define NSLAVES 4 50 51 struct rtfps_softc { 52 struct device sc_dev; 53 void *sc_ih; 54 55 bus_space_tag_t sc_iot; 56 int sc_iobase; 57 int sc_irqport; 58 bus_space_handle_t sc_irqioh; 59 60 int sc_alive; /* mask of slave units attached */ 61 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 62 bus_space_handle_t sc_slaveioh[NSLAVES]; 63 }; 64 65 int rtfpsprobe __P((struct device *, void *, void *)); 66 void rtfpsattach __P((struct device *, struct device *, void *)); 67 int rtfpsintr __P((void *)); 68 int rtfpsprint __P((void *, const char *)); 69 70 struct cfattach rtfps_ca = { 71 sizeof(struct rtfps_softc), rtfpsprobe, rtfpsattach 72 }; 73 74 struct cfdriver rtfps_cd = { 75 NULL, "rtfps", DV_TTY 76 }; 77 78 int 79 rtfpsprobe(parent, self, aux) 80 struct device *parent; 81 void *self; 82 void *aux; 83 { 84 struct isa_attach_args *ia = aux; 85 int iobase = ia->ia_iobase; 86 bus_space_tag_t iot = ia->ia_iot; 87 bus_space_handle_t ioh; 88 int i, rv = 1; 89 90 /* 91 * Do the normal com probe for the first UART and assume 92 * its presence, and the ability to map the other UARTS, 93 * means there is a multiport board there. 94 * XXX Needs more robustness. 95 */ 96 97 /* if the first port is in use as console, then it. */ 98 if (iobase == comconsaddr && !comconsattached) 99 goto checkmappings; 100 101 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 102 rv = 0; 103 goto out; 104 } 105 rv = comprobe1(iot, ioh, iobase); 106 bus_space_unmap(iot, ioh, COM_NPORTS); 107 if (rv == 0) 108 goto out; 109 110 checkmappings: 111 for (i = 1; i < NSLAVES; i++) { 112 iobase += COM_NPORTS; 113 114 if (iobase == comconsaddr && !comconsattached) 115 continue; 116 117 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 118 rv = 0; 119 goto out; 120 } 121 bus_space_unmap(iot, ioh, COM_NPORTS); 122 } 123 124 out: 125 if (rv) 126 ia->ia_iosize = NSLAVES * COM_NPORTS; 127 return (rv); 128 } 129 130 int 131 rtfpsprint(aux, pnp) 132 void *aux; 133 const char *pnp; 134 { 135 struct commulti_attach_args *ca = aux; 136 137 if (pnp) 138 printf("com at %s", pnp); 139 printf(" slave %d", ca->ca_slave); 140 return (UNCONF); 141 } 142 143 void 144 rtfpsattach(parent, self, aux) 145 struct device *parent, *self; 146 void *aux; 147 { 148 struct rtfps_softc *sc = (void *)self; 149 struct isa_attach_args *ia = aux; 150 struct commulti_attach_args ca; 151 static int irqport[] = { 152 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK, 153 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK, 154 IOBASEUNK, 0x2f2, 0x6f2, 0x6f3, 155 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK 156 }; 157 bus_space_tag_t iot = ia->ia_iot; 158 int i; 159 160 sc->sc_iot = ia->ia_iot; 161 sc->sc_iobase = ia->ia_iobase; 162 163 if (ia->ia_irq >= 16 || irqport[ia->ia_irq] == IOBASEUNK) 164 panic("rtfpsattach: invalid irq"); 165 sc->sc_irqport = irqport[ia->ia_irq]; 166 167 for (i = 0; i < NSLAVES; i++) 168 if (bus_space_map(iot, sc->sc_iobase + i * COM_NPORTS, 169 COM_NPORTS, 0, &sc->sc_slaveioh[i])) 170 panic("rtfpsattach: couldn't map slave %d", i); 171 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) 172 panic("rtfpsattach: couldn't map irq port at 0x%x\n", 173 sc->sc_irqport); 174 175 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 176 177 printf("\n"); 178 179 for (i = 0; i < NSLAVES; i++) { 180 ca.ca_slave = i; 181 ca.ca_iot = sc->sc_iot; 182 ca.ca_ioh = sc->sc_slaveioh[i]; 183 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 184 ca.ca_noien = 0; 185 186 sc->sc_slaves[i] = config_found(self, &ca, rtfpsprint); 187 if (sc->sc_slaves[i] != NULL) 188 sc->sc_alive |= 1 << i; 189 } 190 191 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 192 IPL_SERIAL, rtfpsintr, sc); 193 } 194 195 int 196 rtfpsintr(arg) 197 void *arg; 198 { 199 struct rtfps_softc *sc = arg; 200 bus_space_tag_t iot = sc->sc_iot; 201 int alive = sc->sc_alive; 202 203 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 204 205 #define TRY(n) \ 206 if (alive & (1 << (n))) \ 207 comintr(sc->sc_slaves[n]); 208 TRY(0); 209 TRY(1); 210 TRY(2); 211 TRY(3); 212 #undef TRY 213 214 return (1); 215 } 216