1 /* $NetBSD: ioat66.c,v 1.17 2008/04/08 20:08:50 cegger 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 1.17 2008/04/08 20:08:50 cegger 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 <sys/bus.h> 45 #include <sys/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(struct device *parent, struct cfdata *self, 80 void *aux) 81 { 82 struct isa_attach_args *ia = aux; 83 bus_space_tag_t iot = ia->ia_iot; 84 bus_space_handle_t ioh; 85 int iobase; 86 int i, rv = 1; 87 88 if (ia->ia_niomem < 1) 89 return (0); 90 if (ia->ia_nirq < 1) 91 return (0); 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 /* Disallow wildcarded i/o address. */ 100 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 101 return 0; 102 103 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 104 return (0); 105 106 iobase = ia->ia_io[0].ir_addr; 107 /* if the first port is in use as console, then it. */ 108 if (com_is_console(iot, iobase, 0)) 109 goto checkmappings; 110 111 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 112 rv = 0; 113 goto out; 114 } 115 rv = comprobe1(iot, ioh); 116 bus_space_unmap(iot, ioh, COM_NPORTS); 117 if (rv == 0) 118 goto out; 119 120 checkmappings: 121 for (i = 1; i < NSLAVES; i++) { 122 iobase = ioatbases[i]; 123 124 if (com_is_console(iot, iobase, 0)) 125 continue; 126 127 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 128 rv = 0; 129 goto out; 130 } 131 bus_space_unmap(iot, ioh, COM_NPORTS); 132 } 133 134 out: 135 if (rv) { 136 ia->ia_nio = 1; 137 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 138 ia->ia_nirq = 1; 139 ia->ia_niomem = 0; 140 ia->ia_ndrq = 0; 141 } 142 return (rv); 143 } 144 145 void 146 ioat66attach(struct device *parent, struct device *self, void *aux) 147 { 148 struct ioat66_softc *sc = (void *)self; 149 struct isa_attach_args *ia = aux; 150 struct commulti_attach_args ca; 151 bus_space_tag_t iot = ia->ia_iot; 152 int i, iobase, irq; 153 154 printf("\n"); 155 156 sc->sc_iot = ia->ia_iot; 157 sc->sc_iobase = ia->ia_io[0].ir_addr; 158 irq = ia->ia_irq[0].ir_irq; 159 160 for (i = 0; i < NSLAVES; i++) { 161 iobase = ioatbases[i]; 162 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 163 bus_space_map(iot, iobase, COM_NPORTS, 0, 164 &sc->sc_slaveioh[i])) { 165 aprint_error_dev(&sc->sc_dev, "can't map i/o space for slave %d\n", i); 166 return; 167 } 168 } 169 170 if(bus_space_map(iot, IOAT66SHARED, 1, 0, &sc->sc_intmasq)) { 171 aprint_error_dev(&sc->sc_dev, "can't map shared interrupt mask\n"); 172 return; 173 } 174 175 for (i = 0; i < NSLAVES; i++) { 176 177 ca.ca_slave = i; 178 ca.ca_iot = sc->sc_iot; 179 ca.ca_ioh = sc->sc_slaveioh[i]; 180 ca.ca_iobase = ioatbases[i]; 181 ca.ca_noien = 0; 182 183 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 184 if (sc->sc_slaves[i] != NULL) 185 sc->sc_alive |= 1 << i; 186 } 187 188 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, 189 IPL_SERIAL, ioat66intr, sc); 190 } 191 192 int 193 ioat66intr(arg) 194 void *arg; 195 { 196 struct ioat66_softc *sc = arg; 197 bus_space_tag_t iot = sc->sc_iot; 198 int alive = sc->sc_alive; 199 int bits; 200 201 bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive; 202 if (bits == 0) 203 return (0); 204 205 for (;;) { 206 #define TRY(n) \ 207 if (bits & (1 << (n))) \ 208 comintr(sc->sc_slaves[n]); 209 TRY(0); 210 TRY(1); 211 TRY(2); 212 TRY(3); 213 TRY(4); 214 TRY(5); 215 #undef TRY 216 bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive; 217 if (bits == 0) 218 return (1); 219 } 220 } 221