1 /* $NetBSD: com_isa.c,v 1.2 1997/05/24 03:45:40 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/isa/isavar.h> 59 #include <dev/isa/comreg.h> 60 #include <dev/isa/comvar.h> 61 62 #ifdef __BROKEN_INDIRECT_CONFIG 63 int com_isa_probe __P((struct device *, void *, void *)); 64 #else 65 int com_isa_probe __P((struct device *, struct cfdata *, void *)); 66 #endif 67 void com_isa_attach __P((struct device *, struct device *, void *)); 68 void com_isa_cleanup __P((void *)); 69 70 struct cfattach com_isa_ca = { 71 sizeof(struct com_softc), com_isa_probe, com_isa_attach 72 }; 73 74 int 75 com_isa_probe(parent, match, aux) 76 struct device *parent; 77 #ifdef __BROKEN_INDIRECT_CONFIG 78 void *match; 79 #else 80 struct cfdata *match; 81 #endif 82 void *aux; 83 { 84 bus_space_tag_t iot; 85 bus_space_handle_t ioh; 86 int iobase; 87 int rv = 1; 88 struct isa_attach_args *ia = aux; 89 90 iot = ia->ia_iot; 91 iobase = ia->ia_iobase; 92 93 /* if it's in use as console, it's there. */ 94 if (iobase != comconsaddr || comconsattached) { 95 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 96 return 0; 97 } 98 rv = comprobe1(iot, ioh, iobase); 99 bus_space_unmap(iot, ioh, COM_NPORTS); 100 } 101 102 if (rv) { 103 ia->ia_iosize = COM_NPORTS; 104 ia->ia_msize = 0; 105 } 106 return (rv); 107 } 108 109 void 110 com_isa_attach(parent, self, aux) 111 struct device *parent, *self; 112 void *aux; 113 { 114 struct com_softc *sc = (void *)self; 115 int iobase, irq; 116 bus_space_tag_t iot; 117 struct isa_attach_args *ia = aux; 118 119 /* 120 * We're living on an isa. 121 */ 122 iobase = sc->sc_iobase = ia->ia_iobase; 123 iot = sc->sc_iot = ia->ia_iot; 124 if (iobase != comconsaddr) { 125 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) 126 panic("comattach: io mapping failed"); 127 } else 128 sc->sc_ioh = comconsioh; 129 irq = ia->ia_irq; 130 131 com_attach_subr(sc); 132 133 if (irq != IRQUNK) { 134 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, 135 IST_EDGE, IPL_SERIAL, comintr, sc); 136 } 137 138 /* 139 * Shutdown hook for buggy BIOSs that don't recognize the UART 140 * without a disabled FIFO. 141 */ 142 if (shutdownhook_establish(com_isa_cleanup, sc) == NULL) 143 panic("comisa: could not establish shutdown hook"); 144 } 145 146 void 147 com_isa_cleanup(arg) 148 void *arg; 149 { 150 struct com_softc *sc = arg; 151 152 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 153 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 154 } 155