com_obio.c revision 1.9
1 /* $NetBSD: com_obio.c,v 1.9 2002/03/11 16:27:01 pk 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 #include <sys/termios.h> 89 90 #include <machine/bus.h> 91 #include <machine/autoconf.h> 92 #include <machine/intr.h> 93 94 #include <dev/ic/comreg.h> 95 #include <dev/ic/comvar.h> 96 97 #include <sparc/sparc/auxreg.h> 98 99 struct com_obio_softc { 100 struct com_softc osc_com; /* real "com" softc */ 101 102 int osc_tadpole; /* is this on a tadpole */ 103 /* OBIO-specific goo. */ 104 struct evcnt osc_intrcnt; /* interrupt counting */ 105 }; 106 107 static int com_obio_match __P((struct device *, struct cfdata *, void *)); 108 static void com_obio_attach __P((struct device *, struct device *, void *)); 109 static void com_obio_cleanup __P((void *)); 110 111 struct cfattach com_obio_ca = { 112 sizeof(struct com_obio_softc), com_obio_match, com_obio_attach 113 }; 114 115 static int 116 com_obio_match(parent, cf, aux) 117 struct device *parent; 118 struct cfdata *cf; 119 void *aux; 120 { 121 union obio_attach_args *uoba = aux; 122 struct sbus_attach_args *sa = &uoba->uoba_sbus; 123 int tadpole = 0; 124 int need_probe = 0; 125 int rv = 0; 126 u_int8_t auxregval; 127 128 if (uoba->uoba_isobio4 != 0) { 129 return (0); 130 } 131 132 /* Tadpole 3GX/3GS uses "modem" for a 16450 port 133 * (We need to enable it before probing) 134 */ 135 if (strcmp("modem", sa->sa_name) == 0) { 136 auxregval = *AUXIO4M_REG; 137 *AUXIO4M_REG = auxregval | (AUXIO4M_LED|AUXIO4M_LTE); 138 DELAY(100); 139 tadpole = 1; 140 need_probe = 1; 141 } 142 143 /* Sun JavaStation 1 uses "su" for a 16550 port 144 */ 145 if (strcmp("su", sa->sa_name) == 0) { 146 need_probe = 1; 147 } 148 149 if (need_probe) { 150 bus_space_handle_t ioh; 151 152 if (sbus_bus_map(sa->sa_bustag, 153 sa->sa_slot, sa->sa_offset, sa->sa_size, 154 BUS_SPACE_MAP_LINEAR, &ioh) == 0) { 155 rv = comprobe1(sa->sa_bustag, ioh); 156 #if 0 157 printf("modem: probe: lcr=0x%02x iir=0x%02x\n", 158 bus_space_read_1(sa->sa_bustag, ioh, 3), 159 bus_space_read_1(sa->sa_bustag, ioh, 2)); 160 #endif 161 bus_space_unmap(sa->sa_bustag, ioh, sa->sa_size); 162 } 163 } 164 165 /* Disable the com port if tadpole */ 166 if (tadpole) 167 *AUXIO4M_REG = auxregval; 168 169 return (rv); 170 } 171 172 static void 173 com_obio_attach(parent, self, aux) 174 struct device *parent, *self; 175 void *aux; 176 { 177 struct com_obio_softc *osc = (void *)self; 178 struct com_softc *sc = &osc->osc_com; 179 union obio_attach_args *uoba = aux; 180 struct sbus_attach_args *sa = &uoba->uoba_sbus; 181 182 if (strcmp("modem", sa->sa_name) == 0) { 183 osc->osc_tadpole = 1; 184 } 185 186 /* 187 * We're living on an obio that looks like an sbus slot. 188 */ 189 sc->sc_iot = sa->sa_bustag; 190 sc->sc_iobase = sa->sa_offset; 191 sc->sc_frequency = COM_FREQ; 192 193 /* 194 * XXX: It would be nice to be able to split console input and 195 * output to different devices. For now switch to serial 196 * console if PROM stdin is on serial (so that we can use DDB). 197 */ 198 if (prom_instance_to_package(prom_stdin()) == sa->sa_node) 199 comcnattach(sc->sc_iot, sc->sc_iobase, 200 B9600, sc->sc_frequency, (CLOCAL | CREAD | CS8)); 201 202 if (!com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) && 203 sbus_bus_map(sc->sc_iot, 204 sa->sa_slot, sc->sc_iobase, sa->sa_size, 205 BUS_SPACE_MAP_LINEAR, &sc->sc_ioh) != 0) { 206 printf(": can't map registers\n"); 207 return; 208 } 209 210 if (osc->osc_tadpole) { 211 *AUXIO4M_REG |= (AUXIO4M_LED|AUXIO4M_LTE); 212 do { 213 DELAY(100); 214 } while (!comprobe1(sc->sc_iot, sc->sc_ioh)); 215 #if 0 216 printf("modem: attach: lcr=0x%02x iir=0x%02x\n", 217 bus_space_read_1(sc->sc_iot, sc->sc_ioh, 3), 218 bus_space_read_1(sc->sc_iot, sc->sc_ioh, 2)); 219 #endif 220 } 221 222 com_attach_subr(sc); 223 224 if (sa->sa_nintr != 0) { 225 (void)bus_intr_establish(sc->sc_iot, sa->sa_pri, IPL_SERIAL, 226 0, comintr, sc); 227 evcnt_attach_dynamic(&osc->osc_intrcnt, EVCNT_TYPE_INTR, NULL, 228 osc->osc_com.sc_dev.dv_xname, "intr"); 229 } 230 231 /* 232 * Shutdown hook for buggy BIOSs that don't recognize the UART 233 * without a disabled FIFO. 234 */ 235 if (shutdownhook_establish(com_obio_cleanup, sc) == NULL) { 236 panic("com_obio_attach: could not establish shutdown hook"); 237 } 238 } 239 240 static void 241 com_obio_cleanup(arg) 242 void *arg; 243 { 244 struct com_softc *sc = arg; 245 246 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 247 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 248 } 249
Indexes created Wed Sep 24 05:09:52 GMT 2025