1 /* $NetBSD: rtfps.c,v 1.42 2002/01/07 21:47:12 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 1.42 2002/01/07 21:47:12 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 <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 bus_space_tag_t iot = ia->ia_iot; 86 bus_space_handle_t ioh; 87 int i, iobase, rv = 1; 88 89 /* 90 * Do the normal com probe for the first UART and assume 91 * its presence, and the ability to map the other UARTS, 92 * means there is a multiport board there. 93 * XXX Needs more robustness. 94 */ 95 96 if (ia->ia_nio < 1) 97 return (0); 98 if (ia->ia_nirq < 1) 99 return (0); 100 101 /* Disallow wildcarded i/o address. */ 102 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 103 return (0); 104 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 105 return (0); 106 107 /* if the first port is in use as console, then it. */ 108 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 109 goto checkmappings; 110 111 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 112 rv = 0; 113 goto out; 114 } 115 rv = comprobe1(iot, ioh); 116 bus_space_unmap(iot, ioh, COM_NPORTS); 117 if (rv == 0) 118 goto out; 119 120 checkmappings: 121 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 122 iobase += COM_NPORTS; 123 124 if (com_is_console(iot, iobase, 0)) 125 continue; 126 127 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 128 rv = 0; 129 goto out; 130 } 131 bus_space_unmap(iot, ioh, COM_NPORTS); 132 } 133 134 out: 135 if (rv) { 136 ia->ia_nio = 1; 137 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 138 139 ia->ia_nirq = 1; 140 141 ia->ia_niomem = 0; 142 ia->ia_ndrq = 0; 143 } 144 return (rv); 145 } 146 147 int 148 rtfpsprint(aux, pnp) 149 void *aux; 150 const char *pnp; 151 { 152 struct commulti_attach_args *ca = aux; 153 154 if (pnp) 155 printf("com at %s", pnp); 156 printf(" slave %d", ca->ca_slave); 157 return (UNCONF); 158 } 159 160 void 161 rtfpsattach(parent, self, aux) 162 struct device *parent, *self; 163 void *aux; 164 { 165 struct rtfps_softc *sc = (void *)self; 166 struct isa_attach_args *ia = aux; 167 struct commulti_attach_args ca; 168 static int irqport[] = { 169 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, 170 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, 171 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, 172 0x2f2, 0x6f2, 0x6f3, 173 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, 174 ISACF_PORT_DEFAULT 175 }; 176 bus_space_tag_t iot = ia->ia_iot; 177 int i, iobase, irq; 178 179 printf("\n"); 180 181 sc->sc_iot = ia->ia_iot; 182 sc->sc_iobase = ia->ia_io[0].ir_addr; 183 irq = ia->ia_irq[0].ir_irq; 184 185 if (irq >= 16 || irqport[irq] == ISACF_PORT_DEFAULT) { 186 printf("%s: invalid irq\n", sc->sc_dev.dv_xname); 187 return; 188 } 189 sc->sc_irqport = irqport[irq]; 190 191 for (i = 0; i < NSLAVES; i++) { 192 iobase = sc->sc_iobase + i * COM_NPORTS; 193 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 194 bus_space_map(iot, iobase, COM_NPORTS, 0, 195 &sc->sc_slaveioh[i])) { 196 printf("%s: can't map i/o space for slave %d\n", 197 sc->sc_dev.dv_xname, i); 198 return; 199 } 200 } 201 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) { 202 printf("%s: can't map irq port at 0x%x\n", sc->sc_dev.dv_xname, 203 sc->sc_irqport); 204 return; 205 } 206 207 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 208 209 for (i = 0; i < NSLAVES; i++) { 210 ca.ca_slave = i; 211 ca.ca_iot = sc->sc_iot; 212 ca.ca_ioh = sc->sc_slaveioh[i]; 213 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 214 ca.ca_noien = 0; 215 216 sc->sc_slaves[i] = config_found(self, &ca, rtfpsprint); 217 if (sc->sc_slaves[i] != NULL) 218 sc->sc_alive |= 1 << i; 219 } 220 221 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, 222 IPL_SERIAL, rtfpsintr, sc); 223 } 224 225 int 226 rtfpsintr(arg) 227 void *arg; 228 { 229 struct rtfps_softc *sc = arg; 230 bus_space_tag_t iot = sc->sc_iot; 231 int alive = sc->sc_alive; 232 233 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 234 235 #define TRY(n) \ 236 if (alive & (1 << (n))) \ 237 comintr(sc->sc_slaves[n]); 238 TRY(0); 239 TRY(1); 240 TRY(2); 241 TRY(3); 242 #undef TRY 243 244 return (1); 245 } 246