com_isa.c revision 1.19
1 /* $NetBSD: com_isa.c,v 1.19 2002/10/02 02:09:16 thorpej 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/cdefs.h> 75 __KERNEL_RCSID(0, "$NetBSD: com_isa.c,v 1.19 2002/10/02 02:09:16 thorpej Exp $"); 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/ioctl.h> 80 #include <sys/select.h> 81 #include <sys/tty.h> 82 #include <sys/proc.h> 83 #include <sys/user.h> 84 #include <sys/file.h> 85 #include <sys/uio.h> 86 #include <sys/kernel.h> 87 #include <sys/syslog.h> 88 #include <sys/device.h> 89 90 #include <machine/intr.h> 91 #include <machine/bus.h> 92 93 #include <dev/ic/comreg.h> 94 #include <dev/ic/comvar.h> 95 96 #include <dev/isa/isavar.h> 97 98 struct com_isa_softc { 99 struct com_softc sc_com; /* real "com" softc */ 100 101 /* ISA-specific goo. */ 102 void *sc_ih; /* interrupt handler */ 103 }; 104 105 int com_isa_probe __P((struct device *, struct cfdata *, void *)); 106 void com_isa_attach __P((struct device *, struct device *, void *)); 107 void com_isa_cleanup __P((void *)); 108 109 CFATTACH_DECL(com_isa, sizeof(struct com_isa_softc), 110 com_isa_probe, com_isa_attach, NULL, NULL); 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 if (ia->ia_nio < 1) 125 return (0); 126 if (ia->ia_nirq < 1) 127 return (0); 128 129 if (ISA_DIRECT_CONFIG(ia)) 130 return (0); 131 132 /* Disallow wildcarded i/o address. */ 133 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 134 return (0); 135 136 /* Don't allow wildcarded IRQ. */ 137 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 138 return (0); 139 140 iot = ia->ia_iot; 141 iobase = ia->ia_io[0].ir_addr; 142 143 /* if it's in use as console, it's there. */ 144 if (!com_is_console(iot, iobase, 0)) { 145 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 146 return 0; 147 } 148 rv = comprobe1(iot, ioh); 149 bus_space_unmap(iot, ioh, COM_NPORTS); 150 } 151 152 if (rv) { 153 ia->ia_nio = 1; 154 ia->ia_io[0].ir_size = COM_NPORTS; 155 156 ia->ia_nirq = 1; 157 158 ia->ia_niomem = 0; 159 ia->ia_ndrq = 0; 160 } 161 return (rv); 162 } 163 164 void 165 com_isa_attach(parent, self, aux) 166 struct device *parent, *self; 167 void *aux; 168 { 169 struct com_isa_softc *isc = (void *)self; 170 struct com_softc *sc = &isc->sc_com; 171 int iobase, irq; 172 bus_space_tag_t iot; 173 struct isa_attach_args *ia = aux; 174 175 /* 176 * We're living on an isa. 177 */ 178 iobase = sc->sc_iobase = ia->ia_io[0].ir_addr; 179 iot = sc->sc_iot = ia->ia_iot; 180 if (!com_is_console(iot, iobase, &sc->sc_ioh) && 181 bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) { 182 printf(": can't map i/o space\n"); 183 return; 184 } 185 186 sc->sc_frequency = COM_FREQ; 187 irq = ia->ia_irq[0].ir_irq; 188 189 com_attach_subr(sc); 190 191 isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, IPL_SERIAL, 192 comintr, sc); 193 194 /* 195 * Shutdown hook for buggy BIOSs that don't recognize the UART 196 * without a disabled FIFO. 197 */ 198 if (shutdownhook_establish(com_isa_cleanup, sc) == NULL) 199 panic("com_isa_attach: could not establish shutdown hook"); 200 } 201 202 void 203 com_isa_cleanup(arg) 204 void *arg; 205 { 206 struct com_softc *sc = arg; 207 208 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 209 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 210 } 211
Indexes created Sun Sep 28 16:09:52 GMT 2025