com_pioc.c revision 1.9.16.2
1 /* $NetBSD: com_pioc.c,v 1.9.16.2 2008/03/17 09:14:13 yamt 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/param.h> 71 72 __KERNEL_RCSID(0, "$NetBSD: com_pioc.c,v 1.9.16.2 2008/03/17 09:14:13 yamt Exp $"); 73 74 #include <sys/systm.h> 75 #include <sys/tty.h> 76 #include <sys/proc.h> 77 #include <sys/conf.h> 78 #include <sys/kernel.h> 79 #include <sys/device.h> 80 81 #include <machine/intr.h> 82 #include <machine/bus.h> 83 #include <machine/io.h> 84 85 #include <acorn32/mainbus/piocvar.h> 86 #include <dev/ic/comreg.h> 87 #include <dev/ic/comvar.h> 88 89 #include <dev/cons.h> 90 91 #include "locators.h" 92 93 struct com_pioc_softc { 94 struct com_softc sc_com; /* real "com" softc */ 95 void *sc_ih; /* interrupt handler */ 96 }; 97 98 /* Prototypes for functions */ 99 100 cons_decl(com); 101 102 static int com_pioc_probe (device_t, cfdata_t , void *); 103 static void com_pioc_attach (device_t, device_t, void *); 104 105 /* device attach structure */ 106 107 CFATTACH_DECL_NEW(com_pioc, sizeof(struct com_pioc_softc), 108 com_pioc_probe, com_pioc_attach, NULL, NULL); 109 110 extern bus_space_tag_t comconstag; /* From pioc.c */ 111 112 /* 113 * int com_pioc_probe(struct device *parent, struct cfdata *cf, void *aux) 114 * 115 * Make sure we are trying to attach a com device and then 116 * probe for one. 117 */ 118 119 static int 120 com_pioc_probe(device_t parent, cfdata_t cf, void *aux) 121 { 122 bus_space_tag_t iot; 123 bus_space_handle_t ioh; 124 int iobase; 125 int rv = 1; 126 struct pioc_attach_args *pa = aux; 127 128 /* We need an offset */ 129 if (pa->pa_offset == PIOCCF_OFFSET_DEFAULT) 130 return(0); 131 132 iot = pa->pa_iot; 133 iobase = pa->pa_iobase + pa->pa_offset; 134 135 /* if it's in use as console, it's there. */ 136 if (!com_is_console(iot, iobase, 0)) { 137 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 138 return 0; 139 } 140 rv = comprobe1(iot, ioh); 141 bus_space_unmap(iot, ioh, COM_NPORTS); 142 } 143 144 if (rv) { 145 pa->pa_iosize = COM_NPORTS; 146 } 147 return (rv); 148 } 149 150 /* 151 * void com_pioc_attach(struct device *parent, struct device *self, void *aux) 152 * 153 * attach the com device 154 */ 155 156 static void 157 com_pioc_attach(device_t parent, device_t self, void *aux) 158 { 159 struct com_pioc_softc *psc = device_private(self); 160 struct com_softc *sc = &psc->sc_com; 161 u_int iobase; 162 bus_space_tag_t iot; 163 bus_space_handle_t ioh; 164 struct pioc_attach_args *pa = aux; 165 int count; 166 167 sc->sc_dev = self; 168 iot = pa->pa_iot; 169 iobase = pa->pa_iobase + pa->pa_offset; 170 171 /* 172 printf(" (iot = %p, iobase = 0x%08x) ", iot, iobase); 173 */ 174 if (!com_is_console(iot, iobase, &ioh) 175 && bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) 176 panic("comattach: io mapping failed"); 177 COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase); 178 179 sc->sc_frequency = COM_FREQ; 180 181 com_attach_subr(sc); 182 183 if (pa->pa_irq != MAINBUSCF_IRQ_DEFAULT) { 184 psc->sc_ih = intr_claim(pa->pa_irq, IPL_SERIAL, "com", 185 comintr, sc); 186 } 187 188 if (!pmf_device_register1(self, com_suspend, com_resume, com_cleanup)) { 189 aprint_error_dev(self, 190 "could not establish shutdown hook"); 191 } 192 193 /* 194 * This is a patch for bugged revision 1-4 SMC FDC37C665 195 * I/O controllers. 196 * If there is RX data pending when the FIFO in turned on 197 * the RX register cannot be emptied. 198 * 199 * Solution: 200 * Make sure FIFO is off. 201 * Read pending data / int status etc. 202 */ 203 bus_space_write_1(iot, ioh, com_fifo, 0); 204 for (count = 0; count < 8; ++count) 205 (void)bus_space_read_1(iot, ioh, count); 206 207 } 208 209 /* 210 * Console attachment functions 211 */ 212 213 void 214 comcnprobe(struct consdev *cp) 215 { 216 217 #ifdef COMCONSOLE 218 cp->cn_pri = CN_REMOTE; /* Force a serial port console */ 219 #else 220 cp->cn_pri = CN_NORMAL; 221 #endif 222 } 223 224 void 225 comcninit(struct consdev *cp) 226 { 227 int result; 228 229 #ifndef CONMODE 230 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 231 #endif 232 #ifndef CONSPEED 233 #define CONSPEED 38400 234 #endif 235 #ifndef CONADDR 236 #define CONADDR 0x3f8 237 #endif 238 239 result = comcnattach(comconstag, (IO_CONF_BASE + CONADDR), CONSPEED, 240 COM_FREQ, COM_TYPE_NORMAL, CONMODE); 241 if (result) { 242 printf("initialising serial; got errornr %d\n", result); 243 panic("can't init serial console @%x", CONADDR); 244 }; 245 } 246 247 248 /* End of com_pioc.c */ 249
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