com_isa.c revision 1.9
1 /* $NetBSD: com_isa.c,v 1.9 1997/10/19 18:56:52 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1993, 1994, 1995, 1996 5 * Charles M. Hannum. All rights reserved. 6 * Copyright (c) 1991 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)com.c 7.5 (Berkeley) 5/16/91 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/ioctl.h> 43 #include <sys/select.h> 44 #include <sys/tty.h> 45 #include <sys/proc.h> 46 #include <sys/user.h> 47 #include <sys/conf.h> 48 #include <sys/file.h> 49 #include <sys/uio.h> 50 #include <sys/kernel.h> 51 #include <sys/syslog.h> 52 #include <sys/types.h> 53 #include <sys/device.h> 54 55 #include <machine/intr.h> 56 #include <machine/bus.h> 57 58 #include <dev/ic/comreg.h> 59 #include <dev/ic/comvar.h> 60 61 #include <dev/isa/isavar.h> 62 63 struct com_isa_softc { 64 struct com_softc sc_com; /* real "com" softc */ 65 66 /* ISA-specific goo. */ 67 void *sc_ih; /* interrupt handler */ 68 }; 69 70 #ifdef __BROKEN_INDIRECT_CONFIG 71 int com_isa_probe __P((struct device *, void *, void *)); 72 #else 73 int com_isa_probe __P((struct device *, struct cfdata *, void *)); 74 #endif 75 void com_isa_attach __P((struct device *, struct device *, void *)); 76 void com_isa_cleanup __P((void *)); 77 78 struct cfattach com_isa_ca = { 79 sizeof(struct com_isa_softc), com_isa_probe, com_isa_attach 80 }; 81 82 int 83 com_isa_probe(parent, match, aux) 84 struct device *parent; 85 #ifdef __BROKEN_INDIRECT_CONFIG 86 void *match; 87 #else 88 struct cfdata *match; 89 #endif 90 void *aux; 91 { 92 bus_space_tag_t iot; 93 bus_space_handle_t ioh; 94 int iobase; 95 int rv = 1; 96 struct isa_attach_args *ia = aux; 97 98 /* Disallow wildcarded i/o address. */ 99 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 100 return (0); 101 102 iot = ia->ia_iot; 103 iobase = ia->ia_iobase; 104 105 /* if it's in use as console, it's there. */ 106 if (!com_is_console(iot, iobase, 0)) { 107 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 108 return 0; 109 } 110 rv = comprobe1(iot, ioh, iobase); 111 bus_space_unmap(iot, ioh, COM_NPORTS); 112 } 113 114 if (rv) { 115 ia->ia_iosize = COM_NPORTS; 116 ia->ia_msize = 0; 117 } 118 return (rv); 119 } 120 121 void 122 com_isa_attach(parent, self, aux) 123 struct device *parent, *self; 124 void *aux; 125 { 126 struct com_isa_softc *isc = (void *)self; 127 struct com_softc *sc = &isc->sc_com; 128 int iobase, irq; 129 bus_space_tag_t iot; 130 struct isa_attach_args *ia = aux; 131 132 /* 133 * We're living on an isa. 134 */ 135 iobase = sc->sc_iobase = ia->ia_iobase; 136 iot = sc->sc_iot = ia->ia_iot; 137 if(!com_is_console(iot, iobase, &sc->sc_ioh) 138 && bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) 139 panic("comattach: io mapping failed"); 140 141 sc->sc_frequency = COM_FREQ; 142 irq = ia->ia_irq; 143 144 com_attach_subr(sc); 145 146 if (irq != IRQUNK) { 147 isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, 148 IST_EDGE, IPL_SERIAL, comintr, sc); 149 } 150 151 /* 152 * Shutdown hook for buggy BIOSs that don't recognize the UART 153 * without a disabled FIFO. 154 */ 155 if (shutdownhook_establish(com_isa_cleanup, sc) == NULL) 156 panic("comisa: could not establish shutdown hook"); 157 } 158 159 void 160 com_isa_cleanup(arg) 161 void *arg; 162 { 163 struct com_softc *sc = arg; 164 165 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 166 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 167 } 168
Indexes created Wed Sep 24 14:09:57 GMT 2025