1 /* $NetBSD: ioat66.c,v 1.13 2006/04/23 00:08:50 christos 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 1.13 2006/04/23 00:08:50 christos 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(struct device *, struct cfdata *, void *); 72 void ioat66attach(struct device *, struct device *, void *); 73 int ioat66intr(void *); 74 75 CFATTACH_DECL(ioat, sizeof(struct ioat66_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 bus_space_tag_t iot = ia->ia_iot; 86 bus_space_handle_t ioh; 87 int iobase; 88 int i, rv = 1; 89 90 if (ia->ia_niomem < 1) 91 return (0); 92 if (ia->ia_nirq < 1) 93 return (0); 94 /* 95 * Do the normal com probe for the first UART and assume 96 * its presence, and the ability to map the other UARTS, 97 * means there is a multiport board there. 98 * XXX Needs more robustness. 99 */ 100 101 /* Disallow wildcarded i/o address. */ 102 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 103 return 0; 104 105 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 106 return (0); 107 108 iobase = ia->ia_io[0].ir_addr; 109 /* if the first port is in use as console, then it. */ 110 if (com_is_console(iot, iobase, 0)) 111 goto checkmappings; 112 113 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 114 rv = 0; 115 goto out; 116 } 117 rv = comprobe1(iot, ioh); 118 bus_space_unmap(iot, ioh, COM_NPORTS); 119 if (rv == 0) 120 goto out; 121 122 checkmappings: 123 for (i = 1; i < NSLAVES; i++) { 124 iobase = ioatbases[i]; 125 126 if (com_is_console(iot, iobase, 0)) 127 continue; 128 129 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 130 rv = 0; 131 goto out; 132 } 133 bus_space_unmap(iot, ioh, COM_NPORTS); 134 } 135 136 out: 137 if (rv) { 138 ia->ia_nio = 1; 139 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 140 ia->ia_nirq = 1; 141 ia->ia_niomem = 0; 142 ia->ia_ndrq = 0; 143 } 144 return (rv); 145 } 146 147 void 148 ioat66attach(parent, self, aux) 149 struct device *parent, *self; 150 void *aux; 151 { 152 struct ioat66_softc *sc = (void *)self; 153 struct isa_attach_args *ia = aux; 154 struct commulti_attach_args ca; 155 bus_space_tag_t iot = ia->ia_iot; 156 int i, iobase, irq; 157 158 printf("\n"); 159 160 sc->sc_iot = ia->ia_iot; 161 sc->sc_iobase = ia->ia_io[0].ir_addr; 162 irq = ia->ia_irq[0].ir_irq; 163 164 for (i = 0; i < NSLAVES; i++) { 165 iobase = ioatbases[i]; 166 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 167 bus_space_map(iot, iobase, COM_NPORTS, 0, 168 &sc->sc_slaveioh[i])) { 169 printf("%s: can't map i/o space for slave %d\n", 170 sc->sc_dev.dv_xname, i); 171 return; 172 } 173 } 174 175 if(bus_space_map(iot, IOAT66SHARED, 1, 0, &sc->sc_intmasq)) { 176 printf("%s: can't map shared interrupt mask\n", 177 sc->sc_dev.dv_xname); 178 return; 179 } 180 181 for (i = 0; i < NSLAVES; i++) { 182 183 ca.ca_slave = i; 184 ca.ca_iot = sc->sc_iot; 185 ca.ca_ioh = sc->sc_slaveioh[i]; 186 ca.ca_iobase = ioatbases[i]; 187 ca.ca_noien = 0; 188 189 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 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, irq, IST_EDGE, 195 IPL_SERIAL, ioat66intr, sc); 196 } 197 198 int 199 ioat66intr(arg) 200 void *arg; 201 { 202 struct ioat66_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_intmasq, 0) & 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 TRY(4); 220 TRY(5); 221 #undef TRY 222 bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive; 223 if (bits == 0) 224 return (1); 225 } 226 } 227