1 /* $NetBSD: ioat66.c,v 1.24 2021/08/07 16:19:12 thorpej 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 1.24 2021/08/07 16:19:12 thorpej 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 void *sc_ih; 57 58 bus_space_tag_t sc_iot; 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_space_handle_t sc_slaveioh[NSLAVES]; 64 bus_space_handle_t sc_intmasq; 65 }; 66 67 int ioatbases[NSLAVES]={0x220,0x228,0x240,0x248,0x260,0x268}; 68 #define IOAT66SHARED 0x208 69 70 int ioat66probe(device_t, cfdata_t, void *); 71 void ioat66attach(device_t, device_t, void *); 72 int ioat66intr(void *); 73 74 CFATTACH_DECL_NEW(ioat, sizeof(struct ioat66_softc), 75 ioat66probe, ioat66attach, NULL, NULL); 76 77 int 78 ioat66probe(device_t parent, cfdata_t self, void *aux) 79 { 80 struct isa_attach_args *ia = aux; 81 bus_space_tag_t iot = ia->ia_iot; 82 bus_space_handle_t ioh; 83 int iobase; 84 int i, rv = 1; 85 86 if (ia->ia_niomem < 1) 87 return (0); 88 if (ia->ia_nirq < 1) 89 return (0); 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_io[0].ir_addr == ISA_UNKNOWN_PORT) 99 return 0; 100 101 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 102 return (0); 103 104 iobase = ia->ia_io[0].ir_addr; 105 /* if the first port is in use as console, then it. */ 106 if (com_is_console(iot, iobase, 0)) 107 goto checkmappings; 108 109 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 110 rv = 0; 111 goto out; 112 } 113 rv = comprobe1(iot, ioh); 114 bus_space_unmap(iot, ioh, COM_NPORTS); 115 if (rv == 0) 116 goto out; 117 118 checkmappings: 119 for (i = 1; i < NSLAVES; i++) { 120 iobase = ioatbases[i]; 121 122 if (com_is_console(iot, iobase, 0)) 123 continue; 124 125 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 126 rv = 0; 127 goto out; 128 } 129 bus_space_unmap(iot, ioh, COM_NPORTS); 130 } 131 132 out: 133 if (rv) { 134 ia->ia_nio = 1; 135 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 136 ia->ia_nirq = 1; 137 ia->ia_niomem = 0; 138 ia->ia_ndrq = 0; 139 } 140 return (rv); 141 } 142 143 void 144 ioat66attach(device_t parent, device_t self, void *aux) 145 { 146 struct ioat66_softc *sc = device_private(self); 147 struct isa_attach_args *ia = aux; 148 struct commulti_attach_args ca; 149 bus_space_tag_t iot = ia->ia_iot; 150 int i, iobase, irq; 151 152 printf("\n"); 153 154 sc->sc_iot = ia->ia_iot; 155 sc->sc_iobase = ia->ia_io[0].ir_addr; 156 irq = ia->ia_irq[0].ir_irq; 157 158 for (i = 0; i < NSLAVES; i++) { 159 iobase = ioatbases[i]; 160 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 161 bus_space_map(iot, iobase, COM_NPORTS, 0, 162 &sc->sc_slaveioh[i])) { 163 aprint_error_dev(self, 164 "can't map i/o space for slave %d\n", i); 165 return; 166 } 167 } 168 169 if(bus_space_map(iot, IOAT66SHARED, 1, 0, &sc->sc_intmasq)) { 170 aprint_error_dev(self, "can't map shared interrupt mask\n"); 171 return; 172 } 173 174 for (i = 0; i < NSLAVES; i++) { 175 176 ca.ca_slave = i; 177 ca.ca_iot = sc->sc_iot; 178 ca.ca_ioh = sc->sc_slaveioh[i]; 179 ca.ca_iobase = ioatbases[i]; 180 ca.ca_noien = 0; 181 182 sc->sc_slaves[i] = config_found(self, &ca, commultiprint, 183 CFARGS_NONE); 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(void *arg) 194 { 195 struct ioat66_softc *sc = arg; 196 bus_space_tag_t iot = sc->sc_iot; 197 int alive = sc->sc_alive; 198 int bits; 199 200 bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive; 201 if (bits == 0) 202 return (0); 203 204 for (;;) { 205 #define TRY(n) \ 206 if (bits & (1 << (n))) \ 207 comintr(sc->sc_slaves[n]); 208 TRY(0); 209 TRY(1); 210 TRY(2); 211 TRY(3); 212 TRY(4); 213 TRY(5); 214 #undef TRY 215 bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive; 216 if (bits == 0) 217 return (1); 218 } 219 } 220
Indexes created Sat Sep 20 22:09:52 GMT 2025