com_isa.c revision 1.32
1 /* $NetBSD: com_isa.c,v 1.32 2008/02/29 07:02:05 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 1.32 2008/02/29 07:02:05 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 isa_chipset_tag_t sc_ic; 102 void *sc_ih; /* interrupt handler */ 103 int sc_irq; 104 }; 105 106 static bool com_isa_suspend(device_t PMF_FN_PROTO); 107 static bool com_isa_resume(device_t PMF_FN_PROTO); 108 109 int com_isa_probe(device_t, struct cfdata *, void *); 110 void com_isa_attach(device_t, device_t, void *); 111 static int com_isa_detach(device_t, int); 112 #ifdef COM_HAYESP 113 int com_isa_isHAYESP(bus_space_handle_t, struct com_softc *); 114 #endif 115 116 117 CFATTACH_DECL(com_isa, sizeof(struct com_isa_softc), 118 com_isa_probe, com_isa_attach, com_isa_detach, com_activate); 119 120 int 121 com_isa_probe(device_t parent, struct cfdata *match, void *aux) 122 { 123 bus_space_tag_t iot; 124 bus_space_handle_t ioh; 125 int iobase; 126 int rv = 1; 127 struct isa_attach_args *ia = aux; 128 129 if (ia->ia_nio < 1) 130 return (0); 131 if (ia->ia_nirq < 1) 132 return (0); 133 134 if (ISA_DIRECT_CONFIG(ia)) 135 return (0); 136 137 /* Disallow wildcarded i/o address. */ 138 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 139 return (0); 140 141 /* Don't allow wildcarded IRQ. */ 142 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 143 return (0); 144 145 iot = ia->ia_iot; 146 iobase = ia->ia_io[0].ir_addr; 147 148 /* if it's in use as console, it's there. */ 149 if (!com_is_console(iot, iobase, 0)) { 150 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 151 return 0; 152 } 153 rv = comprobe1(iot, ioh); 154 bus_space_unmap(iot, ioh, COM_NPORTS); 155 } 156 157 if (rv) { 158 ia->ia_nio = 1; 159 ia->ia_io[0].ir_size = COM_NPORTS; 160 161 ia->ia_nirq = 1; 162 163 ia->ia_niomem = 0; 164 ia->ia_ndrq = 0; 165 } 166 return (rv); 167 } 168 169 void 170 com_isa_attach(device_t parent, device_t self, void *aux) 171 { 172 struct com_isa_softc *isc = device_private(self); 173 struct com_softc *sc = &isc->sc_com; 174 int iobase, irq; 175 bus_space_tag_t iot; 176 bus_space_handle_t ioh; 177 struct isa_attach_args *ia = aux; 178 #ifdef COM_HAYESP 179 int hayesp_ports[] = { 0x140, 0x180, 0x280, 0x300, 0 }; 180 int *hayespp; 181 #endif 182 183 /* 184 * We're living on an isa. 185 */ 186 iobase = ia->ia_io[0].ir_addr; 187 iot = ia->ia_iot; 188 189 if (!com_is_console(iot, iobase, &ioh) && 190 bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 191 printf(": can't map i/o space\n"); 192 return; 193 } 194 195 COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase); 196 197 sc->sc_frequency = COM_FREQ; 198 irq = ia->ia_irq[0].ir_irq; 199 200 #ifdef COM_HAYESP 201 for (hayespp = hayesp_ports; *hayespp != 0; hayespp++) { 202 bus_space_handle_t hayespioh; 203 #define HAYESP_NPORTS 8 204 if (bus_space_map(iot, *hayespp, HAYESP_NPORTS, 0, &hayespioh)) 205 continue; 206 if (com_isa_isHAYESP(hayespioh, sc)) { 207 break; 208 } 209 bus_space_unmap(iot, hayespioh, HAYESP_NPORTS); 210 } 211 #endif 212 213 com_attach_subr(sc); 214 215 if (!pmf_device_register1(self, com_isa_suspend, com_isa_resume, 216 com_cleanup)) 217 aprint_error_dev(self, "couldn't establish power handler\n"); 218 219 isc->sc_ic = ia->ia_ic; 220 isc->sc_irq = irq; 221 isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, IPL_SERIAL, 222 comintr, sc); 223 } 224 225 static bool 226 com_isa_suspend(device_t self PMF_FN_ARGS) 227 { 228 struct com_isa_softc *isc = device_private(self); 229 230 if (!com_suspend(self PMF_FN_CALL)) 231 return false; 232 233 isa_intr_disestablish(isc->sc_ic, isc->sc_ih); 234 isc->sc_ih = NULL; 235 236 return true; 237 } 238 239 static bool 240 com_isa_resume(device_t self PMF_FN_ARGS) 241 { 242 struct com_isa_softc *isc = device_private(self); 243 struct com_softc *sc = &isc->sc_com; 244 245 isc->sc_ih = isa_intr_establish(isc->sc_ic, isc->sc_irq, IST_EDGE, 246 IPL_SERIAL, comintr, sc); 247 248 return com_resume(self PMF_FN_CALL); 249 } 250 251 static int 252 com_isa_detach(device_t self, int flags) 253 { 254 struct com_isa_softc *isc = device_private(self); 255 struct com_softc *sc = &isc->sc_com; 256 const struct com_regs *cr = &sc->sc_regs; 257 int rc; 258 259 if (isc->sc_ih != NULL) 260 isa_intr_disestablish(isc->sc_ic, isc->sc_ih); 261 262 pmf_device_deregister(self); 263 264 if ((rc = com_detach(self, flags)) != 0) 265 return rc; 266 267 com_cleanup(self, 0); 268 269 #ifdef COM_HAYESP 270 if (sc->sc_type == COM_TYPE_HAYESP) 271 bus_space_unmap(cr->cr_iot, sc->sc_hayespioh, HAYESP_NPORTS); 272 #endif 273 bus_space_unmap(cr->cr_iot, cr->cr_ioh, COM_NPORTS); 274 275 return 0; 276 } 277 278 #ifdef COM_HAYESP 279 int 280 com_isa_isHAYESP(bus_space_handle_t hayespioh, struct com_softc *sc) 281 { 282 char val, dips; 283 int combaselist[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 }; 284 bus_space_tag_t iot = sc->sc_regs.cr_iot; 285 286 /* 287 * Hayes ESP cards have two iobases. One is for compatibility with 288 * 16550 serial chips, and at the same ISA PC base addresses. The 289 * other is for ESP-specific enhanced features, and lies at a 290 * different addressing range entirely (0x140, 0x180, 0x280, or 0x300). 291 */ 292 293 /* Test for ESP signature */ 294 if ((bus_space_read_1(iot, hayespioh, 0) & 0xf3) == 0) 295 return (0); 296 297 /* 298 * ESP is present at ESP enhanced base address; unknown com port 299 */ 300 301 /* Get the dip-switch configurations */ 302 bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS); 303 dips = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); 304 305 /* Determine which com port this ESP card services: bits 0,1 of */ 306 /* dips is the port # (0-3); combaselist[val] is the com_iobase */ 307 if (sc->sc_regs.cr_iobase != combaselist[dips & 0x03]) 308 return (0); 309 310 printf(": ESP"); 311 312 /* Check ESP Self Test bits. */ 313 /* Check for ESP version 2.0: bits 4,5,6 == 010 */ 314 bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETTEST); 315 val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); /* Clear reg1 */ 316 val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS2); 317 if ((val & 0x70) < 0x20) { 318 printf("-old (%o)", val & 0x70); 319 /* we do not support the necessary features */ 320 return (0); 321 } 322 323 /* Check for ability to emulate 16550: bit 8 == 1 */ 324 if ((dips & 0x80) == 0) { 325 printf(" slave"); 326 /* XXX Does slave really mean no 16550 support?? */ 327 return (0); 328 } 329 330 /* 331 * If we made it this far, we are a full-featured ESP v2.0 (or 332 * better), at the correct com port address. 333 */ 334 sc->sc_type = COM_TYPE_HAYESP; 335 sc->sc_hayespioh = hayespioh; 336 sc->sc_fifolen = 1024; 337 sc->sc_prescaler = 0; /* set prescaler to x1. */ 338 printf(", 1024 byte fifo\n"); 339 return (1); 340 } 341 #endif 342
Indexes created Thu Sep 25 16:09:42 GMT 2025