com_obio.c revision 1.3
1 /* $NetBSD: com_obio.c,v 1.3 1999/11/12 05:20:03 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 #include <sparc/sparc/auxreg.h> 96 97 struct com_obio_softc { 98 struct com_softc osc_com; /* real "com" softc */ 99 100 /* OBIO-specific goo. */ 101 struct evcnt osc_intrcnt; /* interrupt counting */ 102 }; 103 104 static int com_obio_match __P((struct device *, struct cfdata *, void *)); 105 static void com_obio_attach __P((struct device *, struct device *, void *)); 106 static void com_obio_cleanup __P((void *)); 107 108 struct cfattach com_obio_ca = { 109 sizeof(struct com_obio_softc), com_obio_match, com_obio_attach 110 }; 111 112 static int 113 com_obio_match(parent, cf, aux) 114 struct device *parent; 115 struct cfdata *cf; 116 void *aux; 117 { 118 union obio_attach_args *uoba = aux; 119 struct sbus_attach_args *sa = &uoba->uoba_sbus; 120 121 if (uoba->uoba_isobio4 != 0) { 122 return (0); 123 } 124 125 /* Tadpole 3GX/3GS uses "modem" for a 16450 port 126 */ 127 if (strcmp("modem", sa->sa_name) == 0) { 128 bus_space_handle_t ioh; 129 int rv = 0; 130 u_int8_t auxregval = *AUXIO4M_REG; 131 *AUXIO4M_REG = auxregval | (AUXIO4M_LED|AUXIO4M_LTE); 132 DELAY(100); 133 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, 134 sa->sa_offset, sa->sa_size, 135 BUS_SPACE_MAP_LINEAR, 0, 136 &ioh) == 0) { 137 rv = comprobe1(sa->sa_bustag, ioh); 138 #if 0 139 printf("modem: probe: lcr=0x%02x iir=0x%02x\n", 140 bus_space_read_1(sa->sa_bustag, ioh, 3), 141 bus_space_read_1(sa->sa_bustag, ioh, 2)); 142 #endif 143 bus_space_unmap(sa->sa_bustag, ioh, sa->sa_size); 144 } 145 *AUXIO4M_REG = auxregval; 146 return (rv); 147 } 148 return (0); 149 } 150 151 static void 152 com_obio_attach(parent, self, aux) 153 struct device *parent, *self; 154 void *aux; 155 { 156 struct com_obio_softc *osc = (void *)self; 157 struct com_softc *sc = &osc->osc_com; 158 union obio_attach_args *uoba = aux; 159 struct sbus_attach_args *sa = &uoba->uoba_sbus; 160 161 /* 162 * We're living on an obio that looks like an sbus slot. 163 */ 164 sc->sc_iot = sa->sa_bustag; 165 sc->sc_iobase = sa->sa_offset; 166 if (!com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) && 167 sbus_bus_map(sc->sc_iot, sa->sa_slot, 168 sc->sc_iobase, sa->sa_size, 169 BUS_SPACE_MAP_LINEAR, 0, 170 &sc->sc_ioh) != 0) { 171 printf(": can't map registers\n"); 172 return; 173 } 174 175 *AUXIO4M_REG |= (AUXIO4M_LED|AUXIO4M_LTE); 176 do { 177 DELAY(100); 178 } while (!comprobe1(sc->sc_iot, sc->sc_ioh)); 179 #if 0 180 printf("modem: attach: lcr=0x%02x iir=0x%02x\n", 181 bus_space_read_1(sc->sc_iot, sc->sc_ioh, 3), 182 bus_space_read_1(sc->sc_iot, sc->sc_ioh, 2)); 183 #endif 184 185 sc->sc_frequency = COM_FREQ; 186 com_attach_subr(sc); 187 188 (void)bus_intr_establish(sc->sc_iot, sa->sa_pri, 0, comintr, sc); 189 190 evcnt_attach(&osc->osc_com.sc_dev, "intr", &osc->osc_intrcnt); 191 192 /* 193 * Shutdown hook for buggy BIOSs that don't recognize the UART 194 * without a disabled FIFO. 195 */ 196 if (shutdownhook_establish(com_obio_cleanup, sc) == NULL) { 197 panic("com_obio_attach: could not establish shutdown hook"); 198 } 199 } 200 201 static void 202 com_obio_cleanup(arg) 203 void *arg; 204 { 205 struct com_softc *sc = arg; 206 207 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 208 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 209 } 210
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