1 /* $OpenBSD: ast.c,v 1.10 1996/05/10 12:35:41 deraadt Exp $ */ 2 /* $NetBSD: ast.c,v 1.27 1996/05/05 19:49:54 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 6 * Copyright (c) 1995 Charles Hannum. All rights reserved. 7 * 8 * This code is derived from public-domain software written by 9 * Roland McGrath. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Charles Hannum. 22 * 4. The name of the author may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/termios.h> 41 42 #ifdef i386 /* XXX */ 43 #include <machine/cpu.h> /* XXX */ 44 #else /* XXX */ 45 #include <machine/intr.h> 46 #endif /* XXX */ 47 #include <machine/bus.h> 48 49 #include <dev/isa/isavar.h> 50 #include <dev/isa/comreg.h> 51 #include <dev/isa/comvar.h> 52 53 #define NSLAVES 4 54 55 struct ast_softc { 56 struct device sc_dev; 57 void *sc_ih; 58 59 bus_chipset_tag_t sc_bc; 60 int sc_iobase; 61 62 int sc_alive; /* mask of slave units attached */ 63 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 64 bus_io_handle_t sc_slaveioh[NSLAVES]; 65 }; 66 67 int astprobe __P((struct device *, void *, void *)); 68 void astattach __P((struct device *, struct device *, void *)); 69 int astintr __P((void *)); 70 int astprint __P((void *, 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 void *self; 84 void *aux; 85 { 86 struct isa_attach_args *ia = aux; 87 int iobase = ia->ia_iobase; 88 bus_chipset_tag_t bc = ia->ia_bc; 89 bus_io_handle_t ioh; 90 int i, rv = 1; 91 92 /* 93 * Do the normal com probe for the first UART and assume 94 * its presence, and the ability to map the other UARTS, 95 * means there is a multiport board there. 96 * XXX Needs more robustness. 97 */ 98 99 /* if the first port is in use as console, then it. */ 100 if (iobase == comconsaddr && !comconsattached) 101 goto checkmappings; 102 103 if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) { 104 rv = 0; 105 goto out; 106 } 107 rv = comprobe1(bc, ioh, iobase); 108 bus_io_unmap(bc, ioh, COM_NPORTS); 109 if (rv == 0) 110 goto out; 111 112 checkmappings: 113 for (i = 1; i < NSLAVES; i++) { 114 iobase += COM_NPORTS; 115 116 if (iobase == comconsaddr && !comconsattached) 117 continue; 118 119 if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) { 120 rv = 0; 121 goto out; 122 } 123 bus_io_unmap(bc, ioh, COM_NPORTS); 124 } 125 126 out: 127 if (rv) 128 ia->ia_iosize = NSLAVES * COM_NPORTS; 129 return (rv); 130 } 131 132 int 133 astprint(aux, pnp) 134 void *aux; 135 char *pnp; 136 { 137 struct commulti_attach_args *ca = aux; 138 139 if (pnp) 140 printf("com at %s", pnp); 141 printf(" slave %d", ca->ca_slave); 142 return (UNCONF); 143 } 144 145 void 146 astattach(parent, self, aux) 147 struct device *parent, *self; 148 void *aux; 149 { 150 struct ast_softc *sc = (void *)self; 151 struct isa_attach_args *ia = aux; 152 struct commulti_attach_args ca; 153 bus_chipset_tag_t bc = ia->ia_bc; 154 int i; 155 156 sc->sc_bc = ia->ia_bc; 157 sc->sc_iobase = ia->ia_iobase; 158 159 for (i = 0; i < NSLAVES; i++) 160 if (bus_io_map(sc->sc_bc, sc->sc_iobase + i * COM_NPORTS, 161 COM_NPORTS, &sc->sc_slaveioh[i])) 162 panic("astattach: couldn't map slave %d", i); 163 164 /* 165 * Enable the master interrupt. 166 */ 167 bus_io_write_1(sc->sc_bc, sc->sc_slaveioh[3], 7, 0x80); 168 169 printf("\n"); 170 171 for (i = 0; i < NSLAVES; i++) { 172 ca.ca_slave = i; 173 ca.ca_bc = sc->sc_bc; 174 ca.ca_ioh = sc->sc_slaveioh[i]; 175 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 176 ca.ca_noien = 1; 177 178 sc->sc_slaves[i] = config_found(self, &ca, astprint); 179 if (sc->sc_slaves[i] != NULL) 180 sc->sc_alive |= 1 << i; 181 } 182 183 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 184 IPL_TTY, astintr, sc, sc->sc_dev.dv_xname); 185 } 186 187 int 188 astintr(arg) 189 void *arg; 190 { 191 struct ast_softc *sc = arg; 192 bus_chipset_tag_t bc = sc->sc_bc; 193 int alive = sc->sc_alive; 194 int bits; 195 196 bits = ~bus_io_read_1(bc, sc->sc_slaveioh[3], 7) & alive; 197 if (bits == 0) 198 return (0); 199 200 for (;;) { 201 #define TRY(n) \ 202 if (bits & (1 << (n))) \ 203 comintr(sc->sc_slaves[n]); 204 TRY(0); 205 TRY(1); 206 TRY(2); 207 TRY(3); 208 #undef TRY 209 bits = ~bus_io_read_1(bc, sc->sc_slaveioh[3], 7) & alive; 210 if (bits == 0) 211 return (1); 212 } 213 } 214