com_obio.c revision 1.12
1 /* $NetBSD: com_obio.c,v 1.12 2002/10/02 16:02:14 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/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 CFATTACH_DECL(com_obio, sizeof(struct com_obio_softc), 112 com_obio_match, com_obio_attach, NULL, NULL); 113 114 static int 115 com_obio_match(parent, cf, aux) 116 struct device *parent; 117 struct cfdata *cf; 118 void *aux; 119 { 120 union obio_attach_args *uoba = aux; 121 struct sbus_attach_args *sa = &uoba->uoba_sbus; 122 int tadpole = 0; 123 int need_probe = 0; 124 int rv = 0; 125 u_int8_t auxregval; 126 127 if (uoba->uoba_isobio4 != 0) { 128 return (0); 129 } 130 131 /* Tadpole 3GX/3GS uses "modem" for a 16450 port 132 * (We need to enable it before probing) 133 */ 134 if (strcmp("modem", sa->sa_name) == 0) { 135 auxregval = *AUXIO4M_REG; 136 *AUXIO4M_REG = auxregval | (AUXIO4M_LED|AUXIO4M_LTE); 137 DELAY(100); 138 tadpole = 1; 139 need_probe = 1; 140 } 141 142 /* Sun JavaStation 1 uses "su" for a 16550 port 143 */ 144 if (strcmp("su", sa->sa_name) == 0) { 145 need_probe = 1; 146 } 147 148 if (need_probe) { 149 bus_space_handle_t ioh; 150 151 if (sbus_bus_map(sa->sa_bustag, 152 sa->sa_slot, sa->sa_offset, sa->sa_size, 153 BUS_SPACE_MAP_LINEAR, &ioh) == 0) { 154 rv = comprobe1(sa->sa_bustag, ioh); 155 #if 0 156 printf("modem: probe: lcr=0x%02x iir=0x%02x\n", 157 bus_space_read_1(sa->sa_bustag, ioh, 3), 158 bus_space_read_1(sa->sa_bustag, ioh, 2)); 159 #endif 160 bus_space_unmap(sa->sa_bustag, ioh, sa->sa_size); 161 } 162 } 163 164 /* Disable the com port if tadpole */ 165 if (tadpole) 166 *AUXIO4M_REG = auxregval; 167 168 return (rv); 169 } 170 171 static void 172 com_obio_attach(parent, self, aux) 173 struct device *parent, *self; 174 void *aux; 175 { 176 struct com_obio_softc *osc = (void *)self; 177 struct com_softc *sc = &osc->osc_com; 178 union obio_attach_args *uoba = aux; 179 struct sbus_attach_args *sa = &uoba->uoba_sbus; 180 181 if (strcmp("modem", sa->sa_name) == 0) { 182 osc->osc_tadpole = 1; 183 } 184 185 /* 186 * We're living on an obio that looks like an sbus slot. 187 */ 188 sc->sc_iot = sa->sa_bustag; 189 sc->sc_iobase = sa->sa_offset; 190 sc->sc_frequency = COM_FREQ; 191 192 /* 193 * XXX: It would be nice to be able to split console input and 194 * output to different devices. For now switch to serial 195 * console if PROM stdin is on serial (so that we can use DDB). 196 */ 197 if (prom_instance_to_package(prom_stdin()) == sa->sa_node) 198 comcnattach(sc->sc_iot, sc->sc_iobase, 199 B9600, sc->sc_frequency, (CLOCAL | CREAD | CS8)); 200 201 if (!com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) && 202 sbus_bus_map(sc->sc_iot, 203 sa->sa_slot, sc->sc_iobase, sa->sa_size, 204 BUS_SPACE_MAP_LINEAR, &sc->sc_ioh) != 0) { 205 printf(": can't map registers\n"); 206 return; 207 } 208 209 if (osc->osc_tadpole) { 210 *AUXIO4M_REG |= (AUXIO4M_LED|AUXIO4M_LTE); 211 do { 212 DELAY(100); 213 } while (!comprobe1(sc->sc_iot, sc->sc_ioh)); 214 #if 0 215 printf("modem: attach: lcr=0x%02x iir=0x%02x\n", 216 bus_space_read_1(sc->sc_iot, sc->sc_ioh, 3), 217 bus_space_read_1(sc->sc_iot, sc->sc_ioh, 2)); 218 #endif 219 } 220 221 com_attach_subr(sc); 222 223 if (sa->sa_nintr != 0) { 224 (void)bus_intr_establish(sc->sc_iot, sa->sa_pri, IPL_SERIAL, 225 0, comintr, sc); 226 evcnt_attach_dynamic(&osc->osc_intrcnt, EVCNT_TYPE_INTR, NULL, 227 osc->osc_com.sc_dev.dv_xname, "intr"); 228 } 229 230 /* 231 * Shutdown hook for buggy BIOSs that don't recognize the UART 232 * without a disabled FIFO. 233 */ 234 if (shutdownhook_establish(com_obio_cleanup, sc) == NULL) { 235 panic("com_obio_attach: could not establish shutdown hook"); 236 } 237 } 238 239 static void 240 com_obio_cleanup(arg) 241 void *arg; 242 { 243 struct com_softc *sc = arg; 244 245 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 246 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 247 } 248
Indexes created Tue Sep 23 23:09:58 GMT 2025