1 /* $OpenBSD: ast.c,v 1.8 1996/04/21 22:22:48 deraadt Exp $ */ 2 /* $NetBSD: ast.c,v 1.26 1996/04/15 18:55:23 cgd 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/device.h> 39 #include <sys/termios.h> 40 41 #ifdef i386 /* XXX */ 42 #include <machine/cpu.h> /* XXX */ 43 #else /* XXX */ 44 #include <machine/intr.h> 45 #endif /* XXX */ 46 #include <machine/bus.h> 47 48 #include <dev/isa/isavar.h> 49 #include <dev/isa/comreg.h> 50 #include <dev/isa/comvar.h> 51 52 #define NSLAVES 4 53 54 struct ast_softc { 55 struct device sc_dev; 56 void *sc_ih; 57 58 bus_chipset_tag_t sc_bc; 59 int sc_iobase; 60 61 int sc_alive; /* mask of slave units attached */ 62 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 63 bus_io_handle_t sc_slaveioh[NSLAVES]; 64 }; 65 66 int astprobe(); 67 void astattach(); 68 int astintr __P((void *)); 69 70 struct cfattach ast_ca = { 71 sizeof(struct ast_softc), astprobe, astattach 72 }; 73 74 struct cfdriver ast_cd = { 75 NULL, "ast", DV_TTY 76 }; 77 78 int 79 astprobe(parent, self, aux) 80 struct device *parent, *self; 81 void *aux; 82 { 83 struct isa_attach_args *ia = aux; 84 int iobase = ia->ia_iobase; 85 bus_chipset_tag_t bc = ia->ia_bc; 86 bus_io_handle_t ioh; 87 int i, 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 the first port is in use as console, then it. */ 97 if (iobase == comconsaddr && !comconsattached) 98 goto checkmappings; 99 100 if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) { 101 rv = 0; 102 goto out; 103 } 104 rv = comprobe1(bc, ioh, iobase); 105 bus_io_unmap(bc, ioh, COM_NPORTS); 106 if (rv == 0) 107 goto out; 108 109 checkmappings: 110 for (i = 1; i < NSLAVES; i++) { 111 iobase += COM_NPORTS; 112 113 if (iobase == comconsaddr && !comconsattached) 114 continue; 115 116 if (bus_io_map(bc, iobase, COM_NPORTS, &ioh)) { 117 rv = 0; 118 goto out; 119 } 120 bus_io_unmap(bc, ioh, COM_NPORTS); 121 } 122 123 out: 124 if (rv) 125 ia->ia_iosize = NSLAVES * COM_NPORTS; 126 return (rv); 127 } 128 129 int 130 astprint(aux, pnp) 131 void *aux; 132 char *pnp; 133 { 134 struct commulti_attach_args *ca = aux; 135 136 if (pnp) 137 printf("com at %s", pnp); 138 printf(" slave %d", ca->ca_slave); 139 return (UNCONF); 140 } 141 142 void 143 astattach(parent, self, aux) 144 struct device *parent, *self; 145 void *aux; 146 { 147 struct ast_softc *sc = (void *)self; 148 struct isa_attach_args *ia = aux; 149 struct commulti_attach_args ca; 150 int i, subunit; 151 152 sc->sc_bc = ia->ia_bc; 153 sc->sc_iobase = ia->ia_iobase; 154 155 for (i = 0; i < NSLAVES; i++) 156 if (bus_io_map(bc, sc->sc_iobase + i * COM_NPORTS, COM_NPORTS, 157 &sc->sc_slaveioh[i])) 158 panic("astattach: couldn't map slave %d", i); 159 160 /* 161 * Enable the master interrupt. 162 */ 163 bus_io_write_1(bc, sc->sc_slaveioh[3], 7, 0x80); 164 165 printf("\n"); 166 167 for (i = 0; i < NSLAVES; i++) { 168 struct cfdata *match; 169 170 ca.ca_slave = i; 171 ca.ca_bc = sc->sc_bc; 172 ca.ca_ioh = sc->sc_slaveioh[i]; 173 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 174 ca.ca_noien = 1; 175 176 sc->sc_slaves[i] = config_found(self, &ca, astprint); 177 if (sc->sc_slaves[i] != NULL) 178 sc->sc_alive |= 1 << i; 179 } 180 181 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 182 IPL_TTY, astintr, sc, sc->sc_dev.dv_xname); 183 } 184 185 int 186 astintr(arg) 187 void *arg; 188 { 189 struct ast_softc *sc = arg; 190 bus_chipset_tag_t bc = sc->sc_bc; 191 int alive = sc->sc_alive; 192 int bits; 193 194 bits = ~bus_io_read_1(bc, sc->sc_slaveioh[3], 7) & alive; 195 if (bits == 0) 196 return (0); 197 198 for (;;) { 199 #define TRY(n) \ 200 if (bits & (1 << (n))) \ 201 comintr(sc->sc_slaves[n]); 202 TRY(0); 203 TRY(1); 204 TRY(2); 205 TRY(3); 206 #undef TRY 207 bits = ~bus_io_read_1(bc, sc->sc_slaveioh[3], 7) & alive; 208 if (bits == 0) 209 return (1); 210 } 211 } 212