1 /* $NetBSD: ast.c,v 1.38 1997/10/03 07:32:50 cjs 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 ast_softc { 52 struct device sc_dev; 53 void *sc_ih; 54 55 bus_space_tag_t sc_iot; 56 int sc_iobase; 57 58 int sc_alive; /* mask of slave units attached */ 59 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 60 bus_space_handle_t sc_slaveioh[NSLAVES]; 61 }; 62 63 #ifdef __BROKEN_INDIRECT_CONFIG 64 int astprobe __P((struct device *, void *, void *)); 65 #else 66 int astprobe __P((struct device *, struct cfdata *, void *)); 67 #endif 68 void astattach __P((struct device *, struct device *, void *)); 69 int astintr __P((void *)); 70 int astprint __P((void *, const char *)); 71 72 struct cfattach ast_ca = { 73 sizeof(struct ast_softc), astprobe, astattach 74 }; 75 76 struct cfdriver ast_cd = { 77 NULL, "ast", DV_TTY 78 }; 79 80 int 81 astprobe(parent, self, aux) 82 struct device *parent; 83 #ifdef __BROKEN_INDIRECT_CONFIG 84 void *self; 85 #else 86 struct cfdata *self; 87 #endif 88 void *aux; 89 { 90 struct isa_attach_args *ia = aux; 91 int iobase = ia->ia_iobase; 92 bus_space_tag_t iot = ia->ia_iot; 93 bus_space_handle_t ioh; 94 int i, rv = 1; 95 96 /* 97 * Do the normal com probe for the first UART and assume 98 * its presence, and the ability to map the other UARTS, 99 * means there is a multiport board there. 100 * XXX Needs more robustness. 101 */ 102 103 /* if the first port is in use as console, then it. */ 104 if (com_is_console(iot, iobase, 0)) 105 goto checkmappings; 106 107 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 108 rv = 0; 109 goto out; 110 } 111 rv = comprobe1(iot, ioh, iobase); 112 bus_space_unmap(iot, ioh, COM_NPORTS); 113 if (rv == 0) 114 goto out; 115 116 checkmappings: 117 for (i = 1; i < NSLAVES; i++) { 118 iobase += COM_NPORTS; 119 120 if (com_is_console(iot, iobase, 0)) 121 continue; 122 123 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 124 rv = 0; 125 goto out; 126 } 127 bus_space_unmap(iot, ioh, COM_NPORTS); 128 } 129 130 out: 131 if (rv) 132 ia->ia_iosize = NSLAVES * COM_NPORTS; 133 return (rv); 134 } 135 136 int 137 astprint(aux, pnp) 138 void *aux; 139 const char *pnp; 140 { 141 struct commulti_attach_args *ca = aux; 142 143 if (pnp) 144 printf("com at %s", pnp); 145 printf(" slave %d", ca->ca_slave); 146 return (UNCONF); 147 } 148 149 void 150 astattach(parent, self, aux) 151 struct device *parent, *self; 152 void *aux; 153 { 154 struct ast_softc *sc = (void *)self; 155 struct isa_attach_args *ia = aux; 156 struct commulti_attach_args ca; 157 bus_space_tag_t iot = ia->ia_iot; 158 int i, iobase; 159 160 sc->sc_iot = ia->ia_iot; 161 sc->sc_iobase = ia->ia_iobase; 162 163 for (i = 0; i < NSLAVES; i++) { 164 iobase = sc->sc_iobase + i * COM_NPORTS; 165 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 166 bus_space_map(iot, iobase, COM_NPORTS, 0, 167 &sc->sc_slaveioh[i])) 168 panic("astattach: couldn't map slave %d", i); 169 } 170 171 /* 172 * Enable the master interrupt. 173 */ 174 bus_space_write_1(iot, sc->sc_slaveioh[3], 7, 0x80); 175 176 printf("\n"); 177 178 for (i = 0; i < NSLAVES; i++) { 179 ca.ca_slave = i; 180 ca.ca_iot = sc->sc_iot; 181 ca.ca_ioh = sc->sc_slaveioh[i]; 182 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 183 ca.ca_noien = 1; 184 185 sc->sc_slaves[i] = config_found(self, &ca, astprint); 186 if (sc->sc_slaves[i] != NULL) 187 sc->sc_alive |= 1 << i; 188 } 189 190 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 191 IPL_SERIAL, astintr, sc); 192 } 193 194 int 195 astintr(arg) 196 void *arg; 197 { 198 struct ast_softc *sc = arg; 199 bus_space_tag_t iot = sc->sc_iot; 200 int alive = sc->sc_alive; 201 int bits; 202 203 bits = ~bus_space_read_1(iot, sc->sc_slaveioh[3], 7) & alive; 204 if (bits == 0) 205 return (0); 206 207 for (;;) { 208 #define TRY(n) \ 209 if (bits & (1 << (n))) \ 210 comintr(sc->sc_slaves[n]); 211 TRY(0); 212 TRY(1); 213 TRY(2); 214 TRY(3); 215 #undef TRY 216 bits = ~bus_space_read_1(iot, sc->sc_slaveioh[3], 7) & alive; 217 if (bits == 0) 218 return (1); 219 } 220 } 221