com_obio.c revision 1.2
1 /* $NetBSD: com_obio.c,v 1.2 1999/08/03 00:32:33 matt 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/autoconf.h> 90 #include <machine/cpu.h> 91 92 #include <dev/ic/comreg.h> 93 #include <dev/ic/comvar.h> 94 95 struct com_obio_softc { 96 struct com_softc osc_com; /* real "com" softc */ 97 98 /* OBIO-specific goo. */ 99 struct evcnt osc_intrcnt; /* interrupt counting */ 100 }; 101 102 static int com_obio_match __P((struct device *, struct cfdata *, void *)); 103 static void com_obio_attach __P((struct device *, struct device *, void *)); 104 static void com_obio_cleanup __P((void *)); 105 106 struct cfattach com_obio_ca = { 107 sizeof(struct com_obio_softc), com_obio_match, com_obio_attach 108 }; 109 110 static int 111 com_obio_match(parent, cf, aux) 112 struct device *parent; 113 struct cfdata *cf; 114 void *aux; 115 { 116 union obio_attach_args *uoba = aux; 117 struct sbus_attach_args *sa = &uoba->uoba_sbus; 118 119 if (uoba->uoba_isobio4 != 0) { 120 return (0); 121 } 122 123 /* Tadpole 3GX/3GS uses "modem" for a 16450 port 124 */ 125 if (strcmp("modem", sa->sa_name) == 0) { 126 bus_space_handle_t ioh; 127 int rv = 0; 128 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, 129 sa->sa_offset, COM_NPORTS, 130 BUS_SPACE_MAP_LINEAR, 0, 131 &ioh) != 0) { 132 rv = comprobe1(sa->sa_bustag, ioh); 133 bus_space_unmap(sa->sa_bustag, ioh, COM_NPORTS); 134 } 135 return (rv); 136 } 137 return (0); 138 } 139 140 static void 141 com_obio_attach(parent, self, aux) 142 struct device *parent, *self; 143 void *aux; 144 { 145 struct com_obio_softc *osc = (void *)self; 146 struct com_softc *sc = &osc->osc_com; 147 union obio_attach_args *uoba = aux; 148 struct sbus_attach_args *sa = &uoba->uoba_sbus; 149 150 /* 151 * We're living on an obio (or an obio that looks like an sbus slot). 152 */ 153 sc->sc_iot = sa->sa_bustag; 154 sc->sc_iobase = sa->sa_offset; 155 if (!com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) && 156 sbus_bus_map(sc->sc_iot, sa->sa_slot, 157 sc->sc_iobase, COM_NPORTS, 158 BUS_SPACE_MAP_LINEAR, 0, 159 &sc->sc_ioh) != 0) { 160 printf(": can't map registers\n"); 161 return; 162 } 163 164 sc->sc_frequency = COM_FREQ; 165 166 com_attach_subr(sc); 167 168 (void)bus_intr_establish(sc->sc_iot, sa->sa_pri, 0, comintr, sc); 169 170 evcnt_attach(&osc->osc_com.sc_dev, "intr", &osc->osc_intrcnt); 171 172 /* 173 * Shutdown hook for buggy BIOSs that don't recognize the UART 174 * without a disabled FIFO. 175 */ 176 if (shutdownhook_establish(com_obio_cleanup, sc) == NULL) { 177 panic("com_obio_attach: could not establish shutdown hook"); 178 } 179 } 180 181 static void 182 com_obio_cleanup(arg) 183 void *arg; 184 { 185 struct com_softc *sc = arg; 186 187 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 188 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 189 } 190
Indexes created Thu Sep 25 02:09:54 GMT 2025