com_isa.c revision 1.13
1 /* $NetBSD: com_isa.c,v 1.13 1998/09/16 21:30:58 is Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 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 the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /*- 40 * Copyright (c) 1991 The Regents of the University of California. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)com.c 7.5 (Berkeley) 5/16/91 72 */ 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/ioctl.h> 77 #include <sys/select.h> 78 #include <sys/tty.h> 79 #include <sys/proc.h> 80 #include <sys/user.h> 81 #include <sys/conf.h> 82 #include <sys/file.h> 83 #include <sys/uio.h> 84 #include <sys/kernel.h> 85 #include <sys/syslog.h> 86 #include <sys/types.h> 87 #include <sys/device.h> 88 89 #include <machine/intr.h> 90 #include <machine/bus.h> 91 92 #include <dev/ic/comreg.h> 93 #include <dev/ic/comvar.h> 94 95 #include <dev/isa/isavar.h> 96 97 struct com_isa_softc { 98 struct com_softc sc_com; /* real "com" softc */ 99 100 /* ISA-specific goo. */ 101 void *sc_ih; /* interrupt handler */ 102 }; 103 104 int com_isa_probe __P((struct device *, struct cfdata *, void *)); 105 void com_isa_attach __P((struct device *, struct device *, void *)); 106 void com_isa_cleanup __P((void *)); 107 108 struct cfattach com_isa_ca = { 109 sizeof(struct com_isa_softc), com_isa_probe, com_isa_attach 110 }; 111 112 int 113 com_isa_probe(parent, match, aux) 114 struct device *parent; 115 struct cfdata *match; 116 void *aux; 117 { 118 bus_space_tag_t iot; 119 bus_space_handle_t ioh; 120 int iobase; 121 int rv = 1; 122 struct isa_attach_args *ia = aux; 123 124 /* Disallow wildcarded i/o address. */ 125 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 126 return (0); 127 128 iot = ia->ia_iot; 129 iobase = ia->ia_iobase; 130 131 /* if it's in use as console, it's there. */ 132 if (!com_is_console(iot, iobase, 0)) { 133 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 134 return 0; 135 } 136 rv = comprobe1(iot, ioh); 137 bus_space_unmap(iot, ioh, COM_NPORTS); 138 } 139 140 if (rv) { 141 ia->ia_iosize = COM_NPORTS; 142 ia->ia_msize = 0; 143 } 144 return (rv); 145 } 146 147 void 148 com_isa_attach(parent, self, aux) 149 struct device *parent, *self; 150 void *aux; 151 { 152 struct com_isa_softc *isc = (void *)self; 153 struct com_softc *sc = &isc->sc_com; 154 int iobase, irq; 155 bus_space_tag_t iot; 156 struct isa_attach_args *ia = aux; 157 158 /* 159 * We're living on an isa. 160 */ 161 iobase = sc->sc_iobase = ia->ia_iobase; 162 iot = sc->sc_iot = ia->ia_iot; 163 if (!com_is_console(iot, iobase, &sc->sc_ioh) && 164 bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) { 165 printf(": can't map i/o space\n"); 166 return; 167 } 168 169 sc->sc_frequency = COM_FREQ; 170 irq = ia->ia_irq; 171 172 com_attach_subr(sc); 173 174 if (irq != IRQUNK) { 175 isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, 176 IST_EDGE, IPL_SERIAL, comintr, sc); 177 } 178 179 /* 180 * Shutdown hook for buggy BIOSs that don't recognize the UART 181 * without a disabled FIFO. 182 */ 183 if (shutdownhook_establish(com_isa_cleanup, sc) == NULL) 184 panic("com_isa_attach: could not establish shutdown hook"); 185 } 186 187 void 188 com_isa_cleanup(arg) 189 void *arg; 190 { 191 struct com_softc *sc = arg; 192 193 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 194 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 195 } 196
Indexes created Tue Sep 23 07:09:52 GMT 2025