1 /* $NetBSD: rtfps.c,v 1.45 2002/10/02 03:10:50 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 1.45 2002/10/02 03:10:50 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 <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 CFATTACH_DECL(rtfps, sizeof(struct rtfps_softc), 75 rtfpsprobe, rtfpsattach, NULL, NULL); 76 77 int 78 rtfpsprobe(parent, self, aux) 79 struct device *parent; 80 struct cfdata *self; 81 void *aux; 82 { 83 struct isa_attach_args *ia = aux; 84 bus_space_tag_t iot = ia->ia_iot; 85 bus_space_handle_t ioh; 86 int i, iobase, rv = 1; 87 88 /* 89 * Do the normal com probe for the first UART and assume 90 * its presence, and the ability to map the other UARTS, 91 * means there is a multiport board there. 92 * XXX Needs more robustness. 93 */ 94 95 if (ia->ia_nio < 1) 96 return (0); 97 if (ia->ia_nirq < 1) 98 return (0); 99 100 /* Disallow wildcarded i/o address. */ 101 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 102 return (0); 103 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 104 return (0); 105 106 /* if the first port is in use as console, then it. */ 107 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 108 goto checkmappings; 109 110 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 111 rv = 0; 112 goto out; 113 } 114 rv = comprobe1(iot, ioh); 115 bus_space_unmap(iot, ioh, COM_NPORTS); 116 if (rv == 0) 117 goto out; 118 119 checkmappings: 120 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 121 iobase += COM_NPORTS; 122 123 if (com_is_console(iot, iobase, 0)) 124 continue; 125 126 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 127 rv = 0; 128 goto out; 129 } 130 bus_space_unmap(iot, ioh, COM_NPORTS); 131 } 132 133 out: 134 if (rv) { 135 ia->ia_nio = 1; 136 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 137 138 ia->ia_nirq = 1; 139 140 ia->ia_niomem = 0; 141 ia->ia_ndrq = 0; 142 } 143 return (rv); 144 } 145 146 int 147 rtfpsprint(aux, pnp) 148 void *aux; 149 const char *pnp; 150 { 151 struct commulti_attach_args *ca = aux; 152 153 if (pnp) 154 printf("com at %s", pnp); 155 printf(" slave %d", ca->ca_slave); 156 return (UNCONF); 157 } 158 159 void 160 rtfpsattach(parent, self, aux) 161 struct device *parent, *self; 162 void *aux; 163 { 164 struct rtfps_softc *sc = (void *)self; 165 struct isa_attach_args *ia = aux; 166 struct commulti_attach_args ca; 167 static int irqport[] = { 168 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, 169 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, 170 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, 171 0x2f2, 0x6f2, 0x6f3, 172 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, 173 ISACF_PORT_DEFAULT 174 }; 175 bus_space_tag_t iot = ia->ia_iot; 176 int i, iobase, irq; 177 178 printf("\n"); 179 180 sc->sc_iot = ia->ia_iot; 181 sc->sc_iobase = ia->ia_io[0].ir_addr; 182 irq = ia->ia_irq[0].ir_irq; 183 184 if (irq >= 16 || irqport[irq] == ISACF_PORT_DEFAULT) { 185 printf("%s: invalid irq\n", sc->sc_dev.dv_xname); 186 return; 187 } 188 sc->sc_irqport = irqport[irq]; 189 190 for (i = 0; i < NSLAVES; i++) { 191 iobase = sc->sc_iobase + i * COM_NPORTS; 192 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 193 bus_space_map(iot, iobase, COM_NPORTS, 0, 194 &sc->sc_slaveioh[i])) { 195 printf("%s: can't map i/o space for slave %d\n", 196 sc->sc_dev.dv_xname, i); 197 return; 198 } 199 } 200 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) { 201 printf("%s: can't map irq port at 0x%x\n", sc->sc_dev.dv_xname, 202 sc->sc_irqport); 203 return; 204 } 205 206 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 207 208 for (i = 0; i < NSLAVES; i++) { 209 ca.ca_slave = i; 210 ca.ca_iot = sc->sc_iot; 211 ca.ca_ioh = sc->sc_slaveioh[i]; 212 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 213 ca.ca_noien = 0; 214 215 sc->sc_slaves[i] = config_found(self, &ca, rtfpsprint); 216 if (sc->sc_slaves[i] != NULL) 217 sc->sc_alive |= 1 << i; 218 } 219 220 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, 221 IPL_SERIAL, rtfpsintr, sc); 222 } 223 224 int 225 rtfpsintr(arg) 226 void *arg; 227 { 228 struct rtfps_softc *sc = arg; 229 bus_space_tag_t iot = sc->sc_iot; 230 int alive = sc->sc_alive; 231 232 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 233 234 #define TRY(n) \ 235 if (alive & (1 << (n))) \ 236 comintr(sc->sc_slaves[n]); 237 TRY(0); 238 TRY(1); 239 TRY(2); 240 TRY(3); 241 #undef TRY 242 243 return (1); 244 } 245