1 /* $NetBSD: rtfps.c,v 1.55 2009/03/14 15:36:18 dsl 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. 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: rtfps.c,v 1.55 2009/03/14 15:36:18 dsl 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 4 54 55 struct rtfps_softc { 56 struct device sc_dev; 57 void *sc_ih; 58 59 bus_space_tag_t sc_iot; 60 int sc_iobase; 61 int sc_irqport; 62 bus_space_handle_t sc_irqioh; 63 64 int sc_alive; /* mask of slave units attached */ 65 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 66 bus_space_handle_t sc_slaveioh[NSLAVES]; 67 }; 68 69 int rtfpsprobe(struct device *, struct cfdata *, void *); 70 void rtfpsattach(struct device *, struct device *, void *); 71 int rtfpsintr(void *); 72 73 CFATTACH_DECL(rtfps, sizeof(struct rtfps_softc), 74 rtfpsprobe, rtfpsattach, NULL, NULL); 75 76 int 77 rtfpsprobe(struct device *parent, struct cfdata *self, 78 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 i, iobase, rv = 1; 84 85 /* 86 * Do the normal com probe for the first UART and assume 87 * its presence, and the ability to map the other UARTS, 88 * means there is a multiport board there. 89 * XXX Needs more robustness. 90 */ 91 92 if (ia->ia_nio < 1) 93 return (0); 94 if (ia->ia_nirq < 1) 95 return (0); 96 97 /* Disallow wildcarded i/o address. */ 98 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 99 return (0); 100 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 101 return (0); 102 103 /* if the first port is in use as console, then it. */ 104 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 105 goto checkmappings; 106 107 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 108 rv = 0; 109 goto out; 110 } 111 rv = comprobe1(iot, ioh); 112 bus_space_unmap(iot, ioh, COM_NPORTS); 113 if (rv == 0) 114 goto out; 115 116 checkmappings: 117 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 118 iobase += COM_NPORTS; 119 120 if (com_is_console(iot, iobase, 0)) 121 continue; 122 123 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 124 rv = 0; 125 goto out; 126 } 127 bus_space_unmap(iot, ioh, COM_NPORTS); 128 } 129 130 out: 131 if (rv) { 132 ia->ia_nio = 1; 133 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 134 135 ia->ia_nirq = 1; 136 137 ia->ia_niomem = 0; 138 ia->ia_ndrq = 0; 139 } 140 return (rv); 141 } 142 143 void 144 rtfpsattach(struct device *parent, struct device *self, void *aux) 145 { 146 struct rtfps_softc *sc = (void *)self; 147 struct isa_attach_args *ia = aux; 148 struct commulti_attach_args ca; 149 static int irqport[] = { 150 -1, -1, -1, -1, -1, -1, -1, -1, 151 -1, 0x2f2, 0x6f2, 0x6f3, -1, -1, -1, -1 152 }; 153 bus_space_tag_t iot = ia->ia_iot; 154 int i, iobase, irq; 155 156 printf("\n"); 157 158 sc->sc_iot = ia->ia_iot; 159 sc->sc_iobase = ia->ia_io[0].ir_addr; 160 irq = ia->ia_irq[0].ir_irq; 161 162 if (irq >= 16 || irqport[irq] == -1) { 163 printf("%s: invalid irq\n", device_xname(&sc->sc_dev)); 164 return; 165 } 166 sc->sc_irqport = irqport[irq]; 167 168 for (i = 0; i < NSLAVES; i++) { 169 iobase = sc->sc_iobase + i * COM_NPORTS; 170 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 171 bus_space_map(iot, iobase, COM_NPORTS, 0, 172 &sc->sc_slaveioh[i])) { 173 aprint_error_dev(&sc->sc_dev, "can't map i/o space for slave %d\n", i); 174 return; 175 } 176 } 177 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) { 178 aprint_error_dev(&sc->sc_dev, "can't map irq port at 0x%x\n", 179 sc->sc_irqport); 180 return; 181 } 182 183 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 184 185 for (i = 0; i < NSLAVES; i++) { 186 ca.ca_slave = i; 187 ca.ca_iot = sc->sc_iot; 188 ca.ca_ioh = sc->sc_slaveioh[i]; 189 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 190 ca.ca_noien = 0; 191 192 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 193 if (sc->sc_slaves[i] != NULL) 194 sc->sc_alive |= 1 << i; 195 } 196 197 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, 198 IPL_SERIAL, rtfpsintr, sc); 199 } 200 201 int 202 rtfpsintr(void *arg) 203 { 204 struct rtfps_softc *sc = arg; 205 bus_space_tag_t iot = sc->sc_iot; 206 int alive = sc->sc_alive; 207 208 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 209 210 #define TRY(n) \ 211 if (alive & (1 << (n))) \ 212 comintr(sc->sc_slaves[n]); 213 TRY(0); 214 TRY(1); 215 TRY(2); 216 TRY(3); 217 #undef TRY 218 219 return (1); 220 } 221