1 /* $NetBSD: ast.c,v 1.42 1998/01/12 09:43:30 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 ast_softc { 53 struct device sc_dev; 54 void *sc_ih; 55 56 bus_space_tag_t sc_iot; 57 int sc_iobase; 58 59 int sc_alive; /* mask of slave units attached */ 60 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 61 bus_space_handle_t sc_slaveioh[NSLAVES]; 62 }; 63 64 #ifdef __BROKEN_INDIRECT_CONFIG 65 int astprobe __P((struct device *, void *, void *)); 66 #else 67 int astprobe __P((struct device *, struct cfdata *, void *)); 68 #endif 69 void astattach __P((struct device *, struct device *, void *)); 70 int astintr __P((void *)); 71 int astprint __P((void *, const char *)); 72 73 struct cfattach ast_ca = { 74 sizeof(struct ast_softc), astprobe, astattach 75 }; 76 77 int 78 astprobe(parent, self, aux) 79 struct device *parent; 80 #ifdef __BROKEN_INDIRECT_CONFIG 81 void *self; 82 #else 83 struct cfdata *self; 84 #endif 85 void *aux; 86 { 87 struct isa_attach_args *ia = aux; 88 int iobase = ia->ia_iobase; 89 bus_space_tag_t iot = ia->ia_iot; 90 bus_space_handle_t ioh; 91 int i, rv = 1; 92 93 /* 94 * Do the normal com probe for the first UART and assume 95 * its presence, and the ability to map the other UARTS, 96 * means there is a multiport board there. 97 * XXX Needs more robustness. 98 */ 99 100 /* Disallow wildcarded i/o address. */ 101 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 102 return (0); 103 104 /* if the first port is in use as console, then it. */ 105 if (com_is_console(iot, iobase, 0)) 106 goto checkmappings; 107 108 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 109 rv = 0; 110 goto out; 111 } 112 rv = comprobe1(iot, ioh, iobase); 113 bus_space_unmap(iot, ioh, COM_NPORTS); 114 if (rv == 0) 115 goto out; 116 117 checkmappings: 118 for (i = 1; i < NSLAVES; i++) { 119 iobase += COM_NPORTS; 120 121 if (com_is_console(iot, iobase, 0)) 122 continue; 123 124 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 125 rv = 0; 126 goto out; 127 } 128 bus_space_unmap(iot, ioh, COM_NPORTS); 129 } 130 131 out: 132 if (rv) 133 ia->ia_iosize = NSLAVES * COM_NPORTS; 134 return (rv); 135 } 136 137 int 138 astprint(aux, pnp) 139 void *aux; 140 const char *pnp; 141 { 142 struct commulti_attach_args *ca = aux; 143 144 if (pnp) 145 printf("com at %s", pnp); 146 printf(" slave %d", ca->ca_slave); 147 return (UNCONF); 148 } 149 150 void 151 astattach(parent, self, aux) 152 struct device *parent, *self; 153 void *aux; 154 { 155 struct ast_softc *sc = (void *)self; 156 struct isa_attach_args *ia = aux; 157 struct commulti_attach_args ca; 158 bus_space_tag_t iot = ia->ia_iot; 159 int i, iobase; 160 161 printf("\n"); 162 163 sc->sc_iot = ia->ia_iot; 164 sc->sc_iobase = ia->ia_iobase; 165 166 for (i = 0; i < NSLAVES; i++) { 167 iobase = sc->sc_iobase + i * COM_NPORTS; 168 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 169 bus_space_map(iot, iobase, COM_NPORTS, 0, 170 &sc->sc_slaveioh[i])) { 171 printf("%s: can't map i/o space for slave %d\n", 172 sc->sc_dev.dv_xname, i); 173 return; 174 } 175 } 176 177 /* 178 * Enable the master interrupt. 179 */ 180 bus_space_write_1(iot, sc->sc_slaveioh[3], 7, 0x80); 181 182 for (i = 0; i < NSLAVES; i++) { 183 ca.ca_slave = i; 184 ca.ca_iot = sc->sc_iot; 185 ca.ca_ioh = sc->sc_slaveioh[i]; 186 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 187 ca.ca_noien = 1; 188 189 sc->sc_slaves[i] = config_found(self, &ca, astprint); 190 if (sc->sc_slaves[i] != NULL) 191 sc->sc_alive |= 1 << i; 192 } 193 194 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 195 IPL_SERIAL, astintr, sc); 196 } 197 198 int 199 astintr(arg) 200 void *arg; 201 { 202 struct ast_softc *sc = arg; 203 bus_space_tag_t iot = sc->sc_iot; 204 int alive = sc->sc_alive; 205 int bits; 206 207 bits = ~bus_space_read_1(iot, sc->sc_slaveioh[3], 7) & alive; 208 if (bits == 0) 209 return (0); 210 211 for (;;) { 212 #define TRY(n) \ 213 if (bits & (1 << (n))) \ 214 comintr(sc->sc_slaves[n]); 215 TRY(0); 216 TRY(1); 217 TRY(2); 218 TRY(3); 219 #undef TRY 220 bits = ~bus_space_read_1(iot, sc->sc_slaveioh[3], 7) & alive; 221 if (bits == 0) 222 return (1); 223 } 224 } 225