1 /* $NetBSD: rtfps.c,v 1.57 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. 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 1.57 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 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(device_t, cfdata_t, void *); 70 void rtfpsattach(device_t, device_t, void *); 71 int rtfpsintr(void *); 72 73 CFATTACH_DECL(rtfps, sizeof(struct rtfps_softc), 74 rtfpsprobe, rtfpsattach, NULL, NULL); 75 76 int 77 rtfpsprobe(device_t parent, cfdata_t self, void *aux) 78 { 79 struct isa_attach_args *ia = aux; 80 bus_space_tag_t iot = ia->ia_iot; 81 bus_space_handle_t ioh; 82 int i, iobase, rv = 1; 83 84 /* 85 * Do the normal com probe for the first UART and assume 86 * its presence, and the ability to map the other UARTS, 87 * means there is a multiport board there. 88 * XXX Needs more robustness. 89 */ 90 91 if (ia->ia_nio < 1) 92 return (0); 93 if (ia->ia_nirq < 1) 94 return (0); 95 96 /* Disallow wildcarded i/o address. */ 97 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 98 return (0); 99 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 100 return (0); 101 102 /* if the first port is in use as console, then it. */ 103 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 104 goto checkmappings; 105 106 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 107 rv = 0; 108 goto out; 109 } 110 rv = comprobe1(iot, ioh); 111 bus_space_unmap(iot, ioh, COM_NPORTS); 112 if (rv == 0) 113 goto out; 114 115 checkmappings: 116 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 117 iobase += COM_NPORTS; 118 119 if (com_is_console(iot, iobase, 0)) 120 continue; 121 122 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 123 rv = 0; 124 goto out; 125 } 126 bus_space_unmap(iot, ioh, COM_NPORTS); 127 } 128 129 out: 130 if (rv) { 131 ia->ia_nio = 1; 132 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 133 134 ia->ia_nirq = 1; 135 136 ia->ia_niomem = 0; 137 ia->ia_ndrq = 0; 138 } 139 return (rv); 140 } 141 142 void 143 rtfpsattach(device_t parent, device_t self, void *aux) 144 { 145 struct rtfps_softc *sc = (void *)self; 146 struct isa_attach_args *ia = aux; 147 struct commulti_attach_args ca; 148 static int irqport[] = { 149 -1, -1, -1, -1, -1, -1, -1, -1, 150 -1, 0x2f2, 0x6f2, 0x6f3, -1, -1, -1, -1 151 }; 152 bus_space_tag_t iot = ia->ia_iot; 153 int i, iobase, irq; 154 155 printf("\n"); 156 157 sc->sc_iot = ia->ia_iot; 158 sc->sc_iobase = ia->ia_io[0].ir_addr; 159 irq = ia->ia_irq[0].ir_irq; 160 161 if (irq >= 16 || irqport[irq] == -1) { 162 printf("%s: invalid irq\n", device_xname(&sc->sc_dev)); 163 return; 164 } 165 sc->sc_irqport = irqport[irq]; 166 167 for (i = 0; i < NSLAVES; i++) { 168 iobase = sc->sc_iobase + i * COM_NPORTS; 169 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 170 bus_space_map(iot, iobase, COM_NPORTS, 0, 171 &sc->sc_slaveioh[i])) { 172 aprint_error_dev(&sc->sc_dev, "can't map i/o space for slave %d\n", i); 173 return; 174 } 175 } 176 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) { 177 aprint_error_dev(&sc->sc_dev, "can't map irq port at 0x%x\n", 178 sc->sc_irqport); 179 return; 180 } 181 182 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 183 184 for (i = 0; i < NSLAVES; i++) { 185 ca.ca_slave = i; 186 ca.ca_iot = sc->sc_iot; 187 ca.ca_ioh = sc->sc_slaveioh[i]; 188 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 189 ca.ca_noien = 0; 190 191 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 192 if (sc->sc_slaves[i] != NULL) 193 sc->sc_alive |= 1 << i; 194 } 195 196 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, 197 IPL_SERIAL, rtfpsintr, sc); 198 } 199 200 int 201 rtfpsintr(void *arg) 202 { 203 struct rtfps_softc *sc = arg; 204 bus_space_tag_t iot = sc->sc_iot; 205 int alive = sc->sc_alive; 206 207 bus_space_write_1(iot, sc->sc_irqioh, 0, 0); 208 209 #define TRY(n) \ 210 if (alive & (1 << (n))) \ 211 comintr(sc->sc_slaves[n]); 212 TRY(0); 213 TRY(1); 214 TRY(2); 215 TRY(3); 216 #undef TRY 217 218 return (1); 219 } 220