1 /* $NetBSD: ioat66.c,v 1.20 2009/05/12 09:10:15 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 1.20 2009/05/12 09:10:15 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(device_t, cfdata_t, void *); 72 void ioat66attach(device_t, device_t, void *); 73 int ioat66intr(void *); 74 75 CFATTACH_DECL(ioat, sizeof(struct ioat66_softc), 76 ioat66probe, ioat66attach, NULL, NULL); 77 78 int 79 ioat66probe(device_t parent, cfdata_t self, void *aux) 80 { 81 struct isa_attach_args *ia = aux; 82 bus_space_tag_t iot = ia->ia_iot; 83 bus_space_handle_t ioh; 84 int iobase; 85 int i, rv = 1; 86 87 if (ia->ia_niomem < 1) 88 return (0); 89 if (ia->ia_nirq < 1) 90 return (0); 91 /* 92 * Do the normal com probe for the first UART and assume 93 * its presence, and the ability to map the other UARTS, 94 * means there is a multiport board there. 95 * XXX Needs more robustness. 96 */ 97 98 /* Disallow wildcarded i/o address. */ 99 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 100 return 0; 101 102 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 103 return (0); 104 105 iobase = ia->ia_io[0].ir_addr; 106 /* if the first port is in use as console, then it. */ 107 if (com_is_console(iot, iobase, 0)) 108 goto checkmappings; 109 110 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 111 rv = 0; 112 goto out; 113 } 114 rv = comprobe1(iot, ioh); 115 bus_space_unmap(iot, ioh, COM_NPORTS); 116 if (rv == 0) 117 goto out; 118 119 checkmappings: 120 for (i = 1; i < NSLAVES; i++) { 121 iobase = ioatbases[i]; 122 123 if (com_is_console(iot, iobase, 0)) 124 continue; 125 126 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 127 rv = 0; 128 goto out; 129 } 130 bus_space_unmap(iot, ioh, COM_NPORTS); 131 } 132 133 out: 134 if (rv) { 135 ia->ia_nio = 1; 136 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 137 ia->ia_nirq = 1; 138 ia->ia_niomem = 0; 139 ia->ia_ndrq = 0; 140 } 141 return (rv); 142 } 143 144 void 145 ioat66attach(device_t parent, device_t self, void *aux) 146 { 147 struct ioat66_softc *sc = (void *)self; 148 struct isa_attach_args *ia = aux; 149 struct commulti_attach_args ca; 150 bus_space_tag_t iot = ia->ia_iot; 151 int i, iobase, irq; 152 153 printf("\n"); 154 155 sc->sc_iot = ia->ia_iot; 156 sc->sc_iobase = ia->ia_io[0].ir_addr; 157 irq = ia->ia_irq[0].ir_irq; 158 159 for (i = 0; i < NSLAVES; i++) { 160 iobase = ioatbases[i]; 161 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 162 bus_space_map(iot, iobase, COM_NPORTS, 0, 163 &sc->sc_slaveioh[i])) { 164 aprint_error_dev(&sc->sc_dev, "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(&sc->sc_dev, "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 if (sc->sc_slaves[i] != NULL) 184 sc->sc_alive |= 1 << i; 185 } 186 187 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, 188 IPL_SERIAL, ioat66intr, sc); 189 } 190 191 int 192 ioat66intr(void *arg) 193 { 194 struct ioat66_softc *sc = arg; 195 bus_space_tag_t iot = sc->sc_iot; 196 int alive = sc->sc_alive; 197 int bits; 198 199 bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive; 200 if (bits == 0) 201 return (0); 202 203 for (;;) { 204 #define TRY(n) \ 205 if (bits & (1 << (n))) \ 206 comintr(sc->sc_slaves[n]); 207 TRY(0); 208 TRY(1); 209 TRY(2); 210 TRY(3); 211 TRY(4); 212 TRY(5); 213 #undef TRY 214 bits = bus_space_read_1(iot, sc->sc_intmasq, 0) & alive; 215 if (bits == 0) 216 return (1); 217 } 218 } 219