1 /* $NetBSD: rtfps.c,v 1.41 2001/11/13 08:01:29 lukem 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 1.41 2001/11/13 08:01:29 lukem 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 <machine/bus.h> 45 #include <machine/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 struct device sc_dev; 57 void *sc_ih; 58 59 bus_space_tag_t sc_iot; 60 int sc_iobase; 61 int sc_irqport; 62 bus_space_handle_t sc_irqioh; 63 64 int sc_alive; /* mask of slave units attached */ 65 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 66 bus_space_handle_t sc_slaveioh[NSLAVES]; 67 }; 68 69 int rtfpsprobe __P((struct device *, struct cfdata *, void *)); 70 void rtfpsattach __P((struct device *, struct device *, void *)); 71 int rtfpsintr __P((void *)); 72 int rtfpsprint __P((void *, const char *)); 73 74 struct cfattach rtfps_ca = { 75 sizeof(struct rtfps_softc), rtfpsprobe, rtfpsattach 76 }; 77 78 int 79 rtfpsprobe(parent, self, aux) 80 struct device *parent; 81 struct cfdata *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 /* Disallow wildcarded i/o address. */ 98 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 99 return (0); 100 101 /* if the first port is in use as console, then it. */ 102 if (com_is_console(iot, iobase, 0)) 103 goto checkmappings; 104 105 if (bus_space_map(iot, iobase, 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; 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_iosize = NSLAVES * COM_NPORTS; 131 return (rv); 132 } 133 134 int 135 rtfpsprint(aux, pnp) 136 void *aux; 137 const char *pnp; 138 { 139 struct commulti_attach_args *ca = aux; 140 141 if (pnp) 142 printf("com at %s", pnp); 143 printf(" slave %d", ca->ca_slave); 144 return (UNCONF); 145 } 146 147 void 148 rtfpsattach(parent, self, aux) 149 struct device *parent, *self; 150 void *aux; 151 { 152 struct rtfps_softc *sc = (void *)self; 153 struct isa_attach_args *ia = aux; 154 struct commulti_attach_args ca; 155 static int irqport[] = { 156 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK, 157 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK, 158 IOBASEUNK, 0x2f2, 0x6f2, 0x6f3, 159 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK 160 }; 161 bus_space_tag_t iot = ia->ia_iot; 162 int i, iobase; 163 164 printf("\n"); 165 166 sc->sc_iot = ia->ia_iot; 167 sc->sc_iobase = ia->ia_iobase; 168 169 if (ia->ia_irq >= 16 || irqport[ia->ia_irq] == IOBASEUNK) { 170 printf("%s: invalid irq\n", sc->sc_dev.dv_xname); 171 return; 172 } 173 sc->sc_irqport = irqport[ia->ia_irq]; 174 175 for (i = 0; i < NSLAVES; i++) { 176 iobase = sc->sc_iobase + i * COM_NPORTS; 177 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 178 bus_space_map(iot, iobase, COM_NPORTS, 0, 179 &sc->sc_slaveioh[i])) { 180 printf("%s: can't map i/o space for slave %d\n", 181 sc->sc_dev.dv_xname, i); 182 return; 183 } 184 } 185 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) { 186 printf("%s: can't map irq port at 0x%x\n", sc->sc_dev.dv_xname, 187 sc->sc_irqport); 188 return; 189 } 190 191 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 192 193 for (i = 0; i < NSLAVES; i++) { 194 ca.ca_slave = i; 195 ca.ca_iot = sc->sc_iot; 196 ca.ca_ioh = sc->sc_slaveioh[i]; 197 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 198 ca.ca_noien = 0; 199 200 sc->sc_slaves[i] = config_found(self, &ca, rtfpsprint); 201 if (sc->sc_slaves[i] != NULL) 202 sc->sc_alive |= 1 << i; 203 } 204 205 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 206 IPL_SERIAL, rtfpsintr, sc); 207 } 208 209 int 210 rtfpsintr(arg) 211 void *arg; 212 { 213 struct rtfps_softc *sc = arg; 214 bus_space_tag_t iot = sc->sc_iot; 215 int alive = sc->sc_alive; 216 217 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 218 219 #define TRY(n) \ 220 if (alive & (1 << (n))) \ 221 comintr(sc->sc_slaves[n]); 222 TRY(0); 223 TRY(1); 224 TRY(2); 225 TRY(3); 226 #undef TRY 227 228 return (1); 229 } 230