com_isa.c revision 1.22
1 /* $NetBSD: com_isa.c,v 1.22 2004/09/14 20:20:46 drochner 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. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)com.c 7.5 (Berkeley) 5/16/91 68 */ 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: com_isa.c,v 1.22 2004/09/14 20:20:46 drochner Exp $"); 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/ioctl.h> 76 #include <sys/select.h> 77 #include <sys/tty.h> 78 #include <sys/proc.h> 79 #include <sys/user.h> 80 #include <sys/file.h> 81 #include <sys/uio.h> 82 #include <sys/kernel.h> 83 #include <sys/syslog.h> 84 #include <sys/device.h> 85 86 #include <machine/intr.h> 87 #include <machine/bus.h> 88 89 #include <dev/ic/comreg.h> 90 #include <dev/ic/comvar.h> 91 92 #include <dev/isa/isavar.h> 93 94 struct com_isa_softc { 95 struct com_softc sc_com; /* real "com" softc */ 96 97 /* ISA-specific goo. */ 98 void *sc_ih; /* interrupt handler */ 99 }; 100 101 int com_isa_probe __P((struct device *, struct cfdata *, void *)); 102 void com_isa_attach __P((struct device *, struct device *, void *)); 103 void com_isa_cleanup __P((void *)); 104 105 CFATTACH_DECL(com_isa, sizeof(struct com_isa_softc), 106 com_isa_probe, com_isa_attach, NULL, NULL); 107 108 int 109 com_isa_probe(parent, match, aux) 110 struct device *parent; 111 struct cfdata *match; 112 void *aux; 113 { 114 bus_space_tag_t iot; 115 bus_space_handle_t ioh; 116 int iobase; 117 int rv = 1; 118 struct isa_attach_args *ia = aux; 119 120 if (ia->ia_nio < 1) 121 return (0); 122 if (ia->ia_nirq < 1) 123 return (0); 124 125 if (ISA_DIRECT_CONFIG(ia)) 126 return (0); 127 128 /* Disallow wildcarded i/o address. */ 129 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 130 return (0); 131 132 /* Don't allow wildcarded IRQ. */ 133 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 134 return (0); 135 136 iot = ia->ia_iot; 137 iobase = ia->ia_io[0].ir_addr; 138 139 /* if it's in use as console, it's there. */ 140 if (!com_is_console(iot, iobase, 0)) { 141 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 142 return 0; 143 } 144 rv = comprobe1(iot, ioh); 145 bus_space_unmap(iot, ioh, COM_NPORTS); 146 } 147 148 if (rv) { 149 ia->ia_nio = 1; 150 ia->ia_io[0].ir_size = COM_NPORTS; 151 152 ia->ia_nirq = 1; 153 154 ia->ia_niomem = 0; 155 ia->ia_ndrq = 0; 156 } 157 return (rv); 158 } 159 160 void 161 com_isa_attach(parent, self, aux) 162 struct device *parent, *self; 163 void *aux; 164 { 165 struct com_isa_softc *isc = (void *)self; 166 struct com_softc *sc = &isc->sc_com; 167 int iobase, irq; 168 bus_space_tag_t iot; 169 struct isa_attach_args *ia = aux; 170 171 /* 172 * We're living on an isa. 173 */ 174 iobase = sc->sc_iobase = ia->ia_io[0].ir_addr; 175 iot = sc->sc_iot = ia->ia_iot; 176 if (!com_is_console(iot, iobase, &sc->sc_ioh) && 177 bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) { 178 printf(": can't map i/o space\n"); 179 return; 180 } 181 182 sc->sc_frequency = COM_FREQ; 183 irq = ia->ia_irq[0].ir_irq; 184 185 com_attach_subr(sc); 186 187 isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, IPL_SERIAL, 188 comintr, sc); 189 190 /* 191 * Shutdown hook for buggy BIOSs that don't recognize the UART 192 * without a disabled FIFO. 193 */ 194 if (shutdownhook_establish(com_isa_cleanup, sc) == NULL) 195 panic("com_isa_attach: could not establish shutdown hook"); 196 } 197 198 void 199 com_isa_cleanup(arg) 200 void *arg; 201 { 202 struct com_softc *sc = arg; 203 204 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 205 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 206 } 207
Indexes created Thu Sep 25 16:09:42 GMT 2025