com_isa.c revision 1.14
1 /* $NetBSD: com_isa.c,v 1.14 2000/03/29 03:43:31 simonb 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/file.h> 82 #include <sys/uio.h> 83 #include <sys/kernel.h> 84 #include <sys/syslog.h> 85 #include <sys/types.h> 86 #include <sys/device.h> 87 88 #include <machine/intr.h> 89 #include <machine/bus.h> 90 91 #include <dev/ic/comreg.h> 92 #include <dev/ic/comvar.h> 93 94 #include <dev/isa/isavar.h> 95 96 struct com_isa_softc { 97 struct com_softc sc_com; /* real "com" softc */ 98 99 /* ISA-specific goo. */ 100 void *sc_ih; /* interrupt handler */ 101 }; 102 103 int com_isa_probe __P((struct device *, struct cfdata *, void *)); 104 void com_isa_attach __P((struct device *, struct device *, void *)); 105 void com_isa_cleanup __P((void *)); 106 107 struct cfattach com_isa_ca = { 108 sizeof(struct com_isa_softc), com_isa_probe, com_isa_attach 109 }; 110 111 int 112 com_isa_probe(parent, match, aux) 113 struct device *parent; 114 struct cfdata *match; 115 void *aux; 116 { 117 bus_space_tag_t iot; 118 bus_space_handle_t ioh; 119 int iobase; 120 int rv = 1; 121 struct isa_attach_args *ia = aux; 122 123 /* Disallow wildcarded i/o address. */ 124 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 125 return (0); 126 127 iot = ia->ia_iot; 128 iobase = ia->ia_iobase; 129 130 /* if it's in use as console, it's there. */ 131 if (!com_is_console(iot, iobase, 0)) { 132 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 133 return 0; 134 } 135 rv = comprobe1(iot, ioh); 136 bus_space_unmap(iot, ioh, COM_NPORTS); 137 } 138 139 if (rv) { 140 ia->ia_iosize = COM_NPORTS; 141 ia->ia_msize = 0; 142 } 143 return (rv); 144 } 145 146 void 147 com_isa_attach(parent, self, aux) 148 struct device *parent, *self; 149 void *aux; 150 { 151 struct com_isa_softc *isc = (void *)self; 152 struct com_softc *sc = &isc->sc_com; 153 int iobase, irq; 154 bus_space_tag_t iot; 155 struct isa_attach_args *ia = aux; 156 157 /* 158 * We're living on an isa. 159 */ 160 iobase = sc->sc_iobase = ia->ia_iobase; 161 iot = sc->sc_iot = ia->ia_iot; 162 if (!com_is_console(iot, iobase, &sc->sc_ioh) && 163 bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) { 164 printf(": can't map i/o space\n"); 165 return; 166 } 167 168 sc->sc_frequency = COM_FREQ; 169 irq = ia->ia_irq; 170 171 com_attach_subr(sc); 172 173 if (irq != IRQUNK) { 174 isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, 175 IST_EDGE, IPL_SERIAL, comintr, sc); 176 } 177 178 /* 179 * Shutdown hook for buggy BIOSs that don't recognize the UART 180 * without a disabled FIFO. 181 */ 182 if (shutdownhook_establish(com_isa_cleanup, sc) == NULL) 183 panic("com_isa_attach: could not establish shutdown hook"); 184 } 185 186 void 187 com_isa_cleanup(arg) 188 void *arg; 189 { 190 struct com_softc *sc = arg; 191 192 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 193 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 194 } 195
Indexes created Sun Oct 19 02:09:48 GMT 2025