1 /* $NetBSD: com_obio.c,v 1.18 2005/11/16 00:49:03 uwe 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_obio.c,v 1.18 2005/11/16 00:49:03 uwe 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/conf.h> 81 #include <sys/file.h> 82 #include <sys/uio.h> 83 #include <sys/kernel.h> 84 #include <sys/syslog.h> 85 #include <sys/types.h> 86 #include <sys/device.h> 87 #include <sys/termios.h> 88 89 #include <machine/bus.h> 90 #include <machine/autoconf.h> 91 #include <machine/intr.h> 92 93 #include <dev/ic/comreg.h> 94 #include <dev/ic/comvar.h> 95 96 #include <sparc/sparc/auxreg.h> 97 98 struct com_obio_softc { 99 struct com_softc osc_com; /* real "com" softc */ 100 101 int osc_tadpole; /* is this on a tadpole */ 102 /* OBIO-specific goo. */ 103 struct evcnt osc_intrcnt; /* interrupt counting */ 104 }; 105 106 static int com_obio_match(struct device *, struct cfdata *, void *); 107 static void com_obio_attach(struct device *, struct device *, void *); 108 static void com_obio_cleanup(void *); 109 110 CFATTACH_DECL(com_obio, sizeof(struct com_obio_softc), 111 com_obio_match, com_obio_attach, NULL, NULL); 112 113 static int 114 com_obio_match(struct device *parent, struct cfdata *cf, void *aux) 115 { 116 union obio_attach_args *uoba = aux; 117 struct sbus_attach_args *sa = &uoba->uoba_sbus; 118 int tadpole = 0; 119 int need_probe = 0; 120 int rv = 0; 121 uint8_t auxregval = 0; 122 123 if (uoba->uoba_isobio4 != 0) { 124 return (0); 125 } 126 127 /* 128 * Tadpole 3GX/3GS uses "modem" for a 16450 port 129 * (We need to enable it before probing) 130 */ 131 if (strcmp("modem", sa->sa_name) == 0) { 132 auxregval = *AUXIO4M_REG; 133 *AUXIO4M_REG = auxregval | (AUXIO4M_LED|AUXIO4M_LTE); 134 DELAY(100); 135 tadpole = 1; 136 need_probe = 1; 137 } 138 139 /* 140 * Sun JavaStation 1 uses "su" for a 16550 port 141 */ 142 if (strcmp("su", sa->sa_name) == 0) { 143 need_probe = 1; 144 } 145 146 if (need_probe) { 147 bus_space_handle_t ioh; 148 149 if (sbus_bus_map(sa->sa_bustag, 150 sa->sa_slot, sa->sa_offset, sa->sa_size, 151 BUS_SPACE_MAP_LINEAR, &ioh) == 0) { 152 rv = comprobe1(sa->sa_bustag, ioh); 153 #if 0 154 printf("modem: probe: lcr=0x%02x iir=0x%02x\n", 155 bus_space_read_1(sa->sa_bustag, ioh, 3), 156 bus_space_read_1(sa->sa_bustag, ioh, 2)); 157 #endif 158 bus_space_unmap(sa->sa_bustag, ioh, sa->sa_size); 159 } 160 } 161 162 /* Disable the com port if tadpole */ 163 if (tadpole) 164 *AUXIO4M_REG = auxregval; 165 166 return (rv); 167 } 168 169 static void 170 com_obio_attach(struct device *parent, struct device *self, void *aux) 171 { 172 struct com_obio_softc *osc = (void *)self; 173 struct com_softc *sc = &osc->osc_com; 174 union obio_attach_args *uoba = aux; 175 struct sbus_attach_args *sa = &uoba->uoba_sbus; 176 177 if (strcmp("modem", sa->sa_name) == 0) { 178 osc->osc_tadpole = 1; 179 } 180 181 /* 182 * We're living on an obio that looks like an sbus slot. 183 */ 184 sc->sc_iot = sa->sa_bustag; 185 sc->sc_iobase = sa->sa_offset; 186 sc->sc_frequency = COM_FREQ; 187 188 /* 189 * XXX: It would be nice to be able to split console input and 190 * output to different devices. For now switch to serial 191 * console if PROM stdin is on serial (so that we can use DDB). 192 */ 193 if (prom_instance_to_package(prom_stdin()) == sa->sa_node) 194 comcnattach(sc->sc_iot, sc->sc_iobase, 195 B9600, sc->sc_frequency, COM_TYPE_NORMAL, 196 (CLOCAL | CREAD | CS8)); 197 198 if (!com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) && 199 sbus_bus_map(sc->sc_iot, 200 sa->sa_slot, sc->sc_iobase, sa->sa_size, 201 BUS_SPACE_MAP_LINEAR, &sc->sc_ioh) != 0) { 202 printf(": can't map registers\n"); 203 return; 204 } 205 206 if (osc->osc_tadpole) { 207 *AUXIO4M_REG |= (AUXIO4M_LED|AUXIO4M_LTE); 208 do { 209 DELAY(100); 210 } while (!comprobe1(sc->sc_iot, sc->sc_ioh)); 211 #if 0 212 printf("modem: attach: lcr=0x%02x iir=0x%02x\n", 213 bus_space_read_1(sc->sc_iot, sc->sc_ioh, 3), 214 bus_space_read_1(sc->sc_iot, sc->sc_ioh, 2)); 215 #endif 216 } 217 218 com_attach_subr(sc); 219 220 if (sa->sa_nintr != 0) { 221 (void)bus_intr_establish(sc->sc_iot, sa->sa_pri, IPL_SERIAL, 222 comintr, sc); 223 evcnt_attach_dynamic(&osc->osc_intrcnt, EVCNT_TYPE_INTR, NULL, 224 osc->osc_com.sc_dev.dv_xname, "intr"); 225 } 226 227 /* 228 * Shutdown hook for buggy BIOSs that don't recognize the UART 229 * without a disabled FIFO. 230 */ 231 if (shutdownhook_establish(com_obio_cleanup, sc) == NULL) { 232 panic("com_obio_attach: could not establish shutdown hook"); 233 } 234 } 235 236 static void 237 com_obio_cleanup(void *arg) 238 { 239 struct com_softc *sc = arg; 240 241 if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 242 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0); 243 } 244