1 /* $NetBSD: rtfps.c,v 1.48 2004/09/14 20:20:49 drochner 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 1.48 2004/09/14 20:20:49 drochner 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 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 __P((struct device *, struct cfdata *, void *)); 70 void rtfpsattach __P((struct device *, struct device *, void *)); 71 int rtfpsintr __P((void *)); 72 73 CFATTACH_DECL(rtfps, sizeof(struct rtfps_softc), 74 rtfpsprobe, rtfpsattach, NULL, NULL); 75 76 int 77 rtfpsprobe(parent, self, aux) 78 struct device *parent; 79 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 i, iobase, rv = 1; 86 87 /* 88 * Do the normal com probe for the first UART and assume 89 * its presence, and the ability to map the other UARTS, 90 * means there is a multiport board there. 91 * XXX Needs more robustness. 92 */ 93 94 if (ia->ia_nio < 1) 95 return (0); 96 if (ia->ia_nirq < 1) 97 return (0); 98 99 /* Disallow wildcarded i/o address. */ 100 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 101 return (0); 102 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 103 return (0); 104 105 /* if the first port is in use as console, then it. */ 106 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 107 goto checkmappings; 108 109 if (bus_space_map(iot, ia->ia_io[0].ir_addr, 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, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 120 iobase += COM_NPORTS; 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; 136 137 ia->ia_nirq = 1; 138 139 ia->ia_niomem = 0; 140 ia->ia_ndrq = 0; 141 } 142 return (rv); 143 } 144 145 void 146 rtfpsattach(parent, self, aux) 147 struct device *parent, *self; 148 void *aux; 149 { 150 struct rtfps_softc *sc = (void *)self; 151 struct isa_attach_args *ia = aux; 152 struct commulti_attach_args ca; 153 static int irqport[] = { 154 -1, -1, -1, -1, -1, -1, -1, -1, 155 -1, 0x2f2, 0x6f2, 0x6f3, -1, -1, -1, -1 156 }; 157 bus_space_tag_t iot = ia->ia_iot; 158 int i, iobase, irq; 159 160 printf("\n"); 161 162 sc->sc_iot = ia->ia_iot; 163 sc->sc_iobase = ia->ia_io[0].ir_addr; 164 irq = ia->ia_irq[0].ir_irq; 165 166 if (irq >= 16 || irqport[irq] == -1) { 167 printf("%s: invalid irq\n", sc->sc_dev.dv_xname); 168 return; 169 } 170 sc->sc_irqport = irqport[irq]; 171 172 for (i = 0; i < NSLAVES; i++) { 173 iobase = sc->sc_iobase + i * COM_NPORTS; 174 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 175 bus_space_map(iot, iobase, COM_NPORTS, 0, 176 &sc->sc_slaveioh[i])) { 177 printf("%s: can't map i/o space for slave %d\n", 178 sc->sc_dev.dv_xname, i); 179 return; 180 } 181 } 182 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) { 183 printf("%s: can't map irq port at 0x%x\n", sc->sc_dev.dv_xname, 184 sc->sc_irqport); 185 return; 186 } 187 188 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 189 190 for (i = 0; i < NSLAVES; i++) { 191 ca.ca_slave = i; 192 ca.ca_iot = sc->sc_iot; 193 ca.ca_ioh = sc->sc_slaveioh[i]; 194 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 195 ca.ca_noien = 0; 196 197 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 198 if (sc->sc_slaves[i] != NULL) 199 sc->sc_alive |= 1 << i; 200 } 201 202 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, 203 IPL_SERIAL, rtfpsintr, sc); 204 } 205 206 int 207 rtfpsintr(arg) 208 void *arg; 209 { 210 struct rtfps_softc *sc = arg; 211 bus_space_tag_t iot = sc->sc_iot; 212 int alive = sc->sc_alive; 213 214 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 215 216 #define TRY(n) \ 217 if (alive & (1 << (n))) \ 218 comintr(sc->sc_slaves[n]); 219 TRY(0); 220 TRY(1); 221 TRY(2); 222 TRY(3); 223 #undef TRY 224 225 return (1); 226 } 227