1 /* $NetBSD: ioat66.c,v 1.9 2004/09/14 20:20:48 drochner 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, and information provided by David Muir Sharnoff. 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: ioat66.c,v 1.9 2004/09/14 20:20:48 drochner 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 6 54 55 struct ioat66_softc { 56 struct device sc_dev; 57 void *sc_ih; 58 59 bus_space_tag_t sc_iot; 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_space_handle_t sc_slaveioh[NSLAVES]; 65 bus_space_handle_t sc_intmasq; 66 }; 67 68 int ioatbases[NSLAVES]={0x220,0x228,0x240,0x248,0x260,0x268}; 69 #define IOAT66SHARED 0x208 70 71 int ioat66probe __P((struct device *, struct cfdata *, void *)); 72 void ioat66attach __P((struct device *, struct device *, void *)); 73 int ioat66intr __P((void *)); 74 75 CFATTACH_DECL(ioat, sizeof(struct ioat_softc), 76 ioat66probe, ioat66attach, NULL, NULL); 77 78 int 79 ioat66probe(parent, self, aux) 80 struct device *parent; 81 struct cfdata *self; 82 void *aux; 83 { 84 struct isa_attach_args *ia = aux; 85 int iobase = ia->ia_iobase; 86 bus_space_tag_t iot = ia->ia_iot; 87 bus_space_handle_t ioh; 88 int i, rv = 1; 89 90 /* 91 * Do the normal com probe for the first UART and assume 92 * its presence, and the ability to map the other UARTS, 93 * means there is a multiport board there. 94 * XXX Needs more robustness. 95 */ 96 97 /* Disallow wildcarded i/o address. */ 98 if (ia->ia_iobase == ISA_UNKNOWN_PORT) 99 return (0); 100 101 /* if the first port is in use as console, then it. */ 102 if (com_is_console(iot, iobase, 0)) 103 goto checkmappings; 104 105 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 106 rv = 0; 107 goto out; 108 } 109 rv = comprobe1(iot, ioh); 110 bus_space_unmap(iot, ioh, COM_NPORTS); 111 if (rv == 0) 112 goto out; 113 114 checkmappings: 115 for (i = 1; i < NSLAVES; i++) { 116 iobase = ioatbases[i]; 117 118 if (com_is_console(iot, iobase, 0)) 119 continue; 120 121 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 122 rv = 0; 123 goto out; 124 } 125 bus_space_unmap(iot, ioh, COM_NPORTS); 126 } 127 128 out: 129 if (rv) 130 ia->ia_iosize = NSLAVES * COM_NPORTS; 131 return (rv); 132 } 133 134 void 135 ioat66attach(parent, self, aux) 136 struct device *parent, *self; 137 void *aux; 138 { 139 struct ioat66_softc *sc = (void *)self; 140 struct isa_attach_args *ia = aux; 141 struct commulti_attach_args ca; 142 bus_space_tag_t iot = ia->ia_iot; 143 int i, iobase; 144 145 printf("\n"); 146 147 sc->sc_iot = ia->ia_iot; 148 sc->sc_iobase = ia->ia_iobase; 149 150 for (i = 0; i < NSLAVES; i++) { 151 iobase = ioatbases[i]; 152 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 153 bus_space_map(iot, iobase, COM_NPORTS, 0, 154 &sc->sc_slaveioh[i])) { 155 printf("%s: can't map i/o space for slave %d\n", 156 sc->sc_dev.dv_xname, i); 157 return; 158 } 159 } 160 161 if(bus_space_map(iot, IOAT66SHARED, 1, 0, &sc->sc_intmasq)) { 162 printf("%s: can't map shared interrupt mask\n", 163 sc->sc_dev.dv_xname); 164 return; 165 } 166 167 for (i = 0; i < NSLAVES; i++) { 168 169 ca.ca_slave = i; 170 ca.ca_iot = sc->sc_iot; 171 ca.ca_ioh = sc->sc_slaveioh[i]; 172 ca.ca_iobase = ioatbases[i]; 173 ca.ca_noien = 0; 174 175 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 176 if (sc->sc_slaves[i] != NULL) 177 sc->sc_alive |= 1 << i; 178 } 179 180 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 181 IPL_SERIAL, ioat66intr, sc); 182 } 183 184 int 185 ioat66intr(arg) 186 void *arg; 187 { 188 struct ioat66_softc *sc = arg; 189 bus_space_tag_t iot = sc->sc_iot; 190 int alive = sc->sc_alive; 191 int bits; 192 193 bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive; 194 if (bits == 0) 195 return (0); 196 197 for (;;) { 198 #define TRY(n) \ 199 if (bits & (1 << (n))) \ 200 comintr(sc->sc_slaves[n]); 201 TRY(0); 202 TRY(1); 203 TRY(2); 204 TRY(3); 205 TRY(4); 206 TRY(5); 207 #undef TRY 208 bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive; 209 if (bits == 0) 210 return (1); 211 } 212 } 213