com_isa.c revision 1.30
1 /* $NetBSD: com_isa.c,v 1.30 2007/12/14 03:36:55 dyoung 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_isa.c,v 1.30 2007/12/14 03:36:55 dyoung 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/file.h> 81 #include <sys/uio.h> 82 #include <sys/kernel.h> 83 #include <sys/syslog.h> 84 #include <sys/device.h> 85 86 #include <sys/intr.h> 87 #include <sys/bus.h> 88 89 #include <dev/ic/comreg.h> 90 #include <dev/ic/comvar.h> 91 #ifdef COM_HAYESP 92 #include <dev/ic/hayespreg.h> 93 #endif 94 95 #include <dev/isa/isavar.h> 96 97 struct com_isa_softc { 98 struct com_softc sc_com; /* real "com" softc */ 99 100 /* ISA-specific goo. */ 101 void *sc_ih; /* interrupt handler */ 102 }; 103 104 int com_isa_probe(struct device *, struct cfdata *, void *); 105 void com_isa_attach(struct device *, struct device *, void *); 106 static int com_isa_detach(device_t, int); 107 #ifdef COM_HAYESP 108 int com_isa_isHAYESP(bus_space_handle_t, struct com_softc *); 109 #endif 110 111 112 CFATTACH_DECL(com_isa, sizeof(struct com_isa_softc), 113 com_isa_probe, com_isa_attach, com_isa_detach, NULL); 114 115 int 116 com_isa_probe(struct device *parent, struct cfdata *match, 117 void *aux) 118 { 119 bus_space_tag_t iot; 120 bus_space_handle_t ioh; 121 int iobase; 122 int rv = 1; 123 struct isa_attach_args *ia = aux; 124 125 if (ia->ia_nio < 1) 126 return (0); 127 if (ia->ia_nirq < 1) 128 return (0); 129 130 if (ISA_DIRECT_CONFIG(ia)) 131 return (0); 132 133 /* Disallow wildcarded i/o address. */ 134 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 135 return (0); 136 137 /* Don't allow wildcarded IRQ. */ 138 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 139 return (0); 140 141 iot = ia->ia_iot; 142 iobase = ia->ia_io[0].ir_addr; 143 144 /* if it's in use as console, it's there. */ 145 if (!com_is_console(iot, iobase, 0)) { 146 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 147 return 0; 148 } 149 rv = comprobe1(iot, ioh); 150 bus_space_unmap(iot, ioh, COM_NPORTS); 151 } 152 153 if (rv) { 154 ia->ia_nio = 1; 155 ia->ia_io[0].ir_size = COM_NPORTS; 156 157 ia->ia_nirq = 1; 158 159 ia->ia_niomem = 0; 160 ia->ia_ndrq = 0; 161 } 162 return (rv); 163 } 164 165 void 166 com_isa_attach(struct device *parent, struct device *self, 167 void *aux) 168 { 169 struct com_isa_softc *isc = (void *)self; 170 struct com_softc *sc = &isc->sc_com; 171 int iobase, irq; 172 bus_space_tag_t iot; 173 bus_space_handle_t ioh; 174 struct isa_attach_args *ia = aux; 175 #ifdef COM_HAYESP 176 int hayesp_ports[] = { 0x140, 0x180, 0x280, 0x300, 0 }; 177 int *hayespp; 178 #endif 179 180 /* 181 * We're living on an isa. 182 */ 183 iobase = ia->ia_io[0].ir_addr; 184 iot = ia->ia_iot; 185 186 if (!com_is_console(iot, iobase, &ioh) && 187 bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 188 printf(": can't map i/o space\n"); 189 return; 190 } 191 192 COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase); 193 194 sc->sc_frequency = COM_FREQ; 195 irq = ia->ia_irq[0].ir_irq; 196 197 #ifdef COM_HAYESP 198 for (hayespp = hayesp_ports; *hayespp != 0; hayespp++) { 199 bus_space_handle_t hayespioh; 200 #define HAYESP_NPORTS 8 201 if (bus_space_map(iot, *hayespp, HAYESP_NPORTS, 0, &hayespioh)) 202 continue; 203 if (com_isa_isHAYESP(hayespioh, sc)) { 204 break; 205 } 206 bus_space_unmap(iot, hayespioh, HAYESP_NPORTS); 207 } 208 #endif 209 210 com_attach_subr(sc); 211 212 if (!pmf_device_register(self, NULL, com_resume)) 213 aprint_error_dev(self, "couldn't establish power handler\n"); 214 215 isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, IPL_SERIAL, 216 comintr, sc); 217 218 /* 219 * Shutdown hook for buggy BIOSs that don't recognize the UART 220 * without a disabled FIFO. 221 */ 222 if (shutdownhook_establish(com_cleanup, sc) == NULL) 223 panic("com_isa_attach: could not establish shutdown hook"); 224 } 225 226 static int 227 com_isa_detach(struct device *self, int flags) 228 { 229 pmf_device_deregister(self); 230 231 return com_detach(self, flags); 232 } 233 234 #ifdef COM_HAYESP 235 int 236 com_isa_isHAYESP(bus_space_handle_t hayespioh, struct com_softc *sc) 237 { 238 char val, dips; 239 int combaselist[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 }; 240 bus_space_tag_t iot = sc->sc_regs.cr_iot; 241 242 /* 243 * Hayes ESP cards have two iobases. One is for compatibility with 244 * 16550 serial chips, and at the same ISA PC base addresses. The 245 * other is for ESP-specific enhanced features, and lies at a 246 * different addressing range entirely (0x140, 0x180, 0x280, or 0x300). 247 */ 248 249 /* Test for ESP signature */ 250 if ((bus_space_read_1(iot, hayespioh, 0) & 0xf3) == 0) 251 return (0); 252 253 /* 254 * ESP is present at ESP enhanced base address; unknown com port 255 */ 256 257 /* Get the dip-switch configurations */ 258 bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS); 259 dips = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); 260 261 /* Determine which com port this ESP card services: bits 0,1 of */ 262 /* dips is the port # (0-3); combaselist[val] is the com_iobase */ 263 if (sc->sc_regs.cr_iobase != combaselist[dips & 0x03]) 264 return (0); 265 266 printf(": ESP"); 267 268 /* Check ESP Self Test bits. */ 269 /* Check for ESP version 2.0: bits 4,5,6 == 010 */ 270 bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETTEST); 271 val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); /* Clear reg1 */ 272 val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS2); 273 if ((val & 0x70) < 0x20) { 274 printf("-old (%o)", val & 0x70); 275 /* we do not support the necessary features */ 276 return (0); 277 } 278 279 /* Check for ability to emulate 16550: bit 8 == 1 */ 280 if ((dips & 0x80) == 0) { 281 printf(" slave"); 282 /* XXX Does slave really mean no 16550 support?? */ 283 return (0); 284 } 285 286 /* 287 * If we made it this far, we are a full-featured ESP v2.0 (or 288 * better), at the correct com port address. 289 */ 290 sc->sc_type = COM_TYPE_HAYESP; 291 sc->sc_hayespioh = hayespioh; 292 sc->sc_fifolen = 1024; 293 sc->sc_prescaler = 0; /* set prescaler to x1. */ 294 printf(", 1024 byte fifo\n"); 295 return (1); 296 } 297 #endif 298
Indexes created Fri Sep 26 20:09:58 GMT 2025