com_isa.c revision 1.36
1 /* $NetBSD: com_isa.c,v 1.36 2009/11/12 20:28:32 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1991 The Regents of the University of California. 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)com.c 7.5 (Berkeley) 5/16/91 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: com_isa.c,v 1.36 2009/11/12 20:28:32 dyoung Exp $"); 65 66 #include <sys/param.h> 67 #include <sys/systm.h> 68 #include <sys/ioctl.h> 69 #include <sys/select.h> 70 #include <sys/tty.h> 71 #include <sys/proc.h> 72 #include <sys/user.h> 73 #include <sys/file.h> 74 #include <sys/uio.h> 75 #include <sys/kernel.h> 76 #include <sys/syslog.h> 77 #include <sys/device.h> 78 79 #include <sys/intr.h> 80 #include <sys/bus.h> 81 82 #include <dev/ic/comreg.h> 83 #include <dev/ic/comvar.h> 84 #ifdef COM_HAYESP 85 #include <dev/ic/hayespreg.h> 86 #endif 87 88 #include <dev/isa/isavar.h> 89 90 struct com_isa_softc { 91 struct com_softc sc_com; /* real "com" softc */ 92 93 /* ISA-specific goo. */ 94 isa_chipset_tag_t sc_ic; 95 void *sc_ih; /* interrupt handler */ 96 int sc_irq; 97 }; 98 99 static bool com_isa_suspend(device_t PMF_FN_PROTO); 100 static bool com_isa_resume(device_t PMF_FN_PROTO); 101 102 int com_isa_probe(device_t, cfdata_t , void *); 103 void com_isa_attach(device_t, device_t, void *); 104 static int com_isa_detach(device_t, int); 105 #ifdef COM_HAYESP 106 int com_isa_isHAYESP(bus_space_handle_t, struct com_softc *); 107 #endif 108 109 110 CFATTACH_DECL3_NEW(com_isa, sizeof(struct com_isa_softc), 111 com_isa_probe, com_isa_attach, com_isa_detach, NULL, 112 NULL, NULL, DVF_DETACH_SHUTDOWN); 113 114 int 115 com_isa_probe(device_t parent, cfdata_t match, void *aux) 116 { 117 bus_space_tag_t iot; 118 bus_space_handle_t ioh; 119 int iobase; 120 int rv = 1; 121 struct isa_attach_args *ia = aux; 122 123 if (ia->ia_nio < 1) 124 return (0); 125 if (ia->ia_nirq < 1) 126 return (0); 127 128 if (ISA_DIRECT_CONFIG(ia)) 129 return (0); 130 131 /* Disallow wildcarded i/o address. */ 132 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 133 return (0); 134 135 /* Don't allow wildcarded IRQ. */ 136 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 137 return (0); 138 139 iot = ia->ia_iot; 140 iobase = ia->ia_io[0].ir_addr; 141 142 /* if it's in use as console, it's there. */ 143 if (!com_is_console(iot, iobase, 0)) { 144 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 145 return 0; 146 } 147 rv = comprobe1(iot, ioh); 148 bus_space_unmap(iot, ioh, COM_NPORTS); 149 } 150 151 if (rv) { 152 ia->ia_nio = 1; 153 ia->ia_io[0].ir_size = COM_NPORTS; 154 155 ia->ia_nirq = 1; 156 157 ia->ia_niomem = 0; 158 ia->ia_ndrq = 0; 159 } 160 return (rv); 161 } 162 163 void 164 com_isa_attach(device_t parent, device_t self, void *aux) 165 { 166 struct com_isa_softc *isc = device_private(self); 167 struct com_softc *sc = &isc->sc_com; 168 int iobase, irq; 169 bus_space_tag_t iot; 170 bus_space_handle_t ioh; 171 struct isa_attach_args *ia = aux; 172 #ifdef COM_HAYESP 173 int hayesp_ports[] = { 0x140, 0x180, 0x280, 0x300, 0 }; 174 int *hayespp; 175 #endif 176 177 /* 178 * We're living on an isa. 179 */ 180 iobase = ia->ia_io[0].ir_addr; 181 iot = ia->ia_iot; 182 183 if (!com_is_console(iot, iobase, &ioh) && 184 bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 185 printf(": can't map i/o space\n"); 186 return; 187 } 188 189 sc->sc_dev = self; 190 191 COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase); 192 193 sc->sc_frequency = COM_FREQ; 194 irq = ia->ia_irq[0].ir_irq; 195 196 #ifdef COM_HAYESP 197 for (hayespp = hayesp_ports; *hayespp != 0; hayespp++) { 198 bus_space_handle_t hayespioh; 199 #define HAYESP_NPORTS 8 200 if (bus_space_map(iot, *hayespp, HAYESP_NPORTS, 0, &hayespioh)) 201 continue; 202 if (com_isa_isHAYESP(hayespioh, sc)) { 203 break; 204 } 205 bus_space_unmap(iot, hayespioh, HAYESP_NPORTS); 206 } 207 #endif 208 209 com_attach_subr(sc); 210 211 if (!pmf_device_register1(self, com_isa_suspend, com_isa_resume, 212 com_cleanup)) 213 aprint_error_dev(self, "couldn't establish power handler\n"); 214 215 isc->sc_ic = ia->ia_ic; 216 isc->sc_irq = irq; 217 isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, IPL_SERIAL, 218 comintr, sc); 219 } 220 221 static bool 222 com_isa_suspend(device_t self PMF_FN_ARGS) 223 { 224 struct com_isa_softc *isc = device_private(self); 225 226 if (!com_suspend(self PMF_FN_CALL)) 227 return false; 228 229 isa_intr_disestablish(isc->sc_ic, isc->sc_ih); 230 isc->sc_ih = NULL; 231 232 return true; 233 } 234 235 static bool 236 com_isa_resume(device_t self PMF_FN_ARGS) 237 { 238 struct com_isa_softc *isc = device_private(self); 239 struct com_softc *sc = &isc->sc_com; 240 241 isc->sc_ih = isa_intr_establish(isc->sc_ic, isc->sc_irq, IST_EDGE, 242 IPL_SERIAL, comintr, sc); 243 244 return com_resume(self PMF_FN_CALL); 245 } 246 247 static int 248 com_isa_detach(device_t self, int flags) 249 { 250 struct com_isa_softc *isc = device_private(self); 251 struct com_softc *sc = &isc->sc_com; 252 const struct com_regs *cr = &sc->sc_regs; 253 int rc; 254 255 if ((rc = com_detach(self, flags)) != 0) 256 return rc; 257 258 if (isc->sc_ih != NULL) 259 isa_intr_disestablish(isc->sc_ic, isc->sc_ih); 260 261 pmf_device_deregister(self); 262 263 com_cleanup(self, 0); 264 265 #ifdef COM_HAYESP 266 if (sc->sc_type == COM_TYPE_HAYESP) 267 bus_space_unmap(cr->cr_iot, sc->sc_hayespioh, HAYESP_NPORTS); 268 #endif 269 bus_space_unmap(cr->cr_iot, cr->cr_ioh, COM_NPORTS); 270 271 return 0; 272 } 273 274 #ifdef COM_HAYESP 275 int 276 com_isa_isHAYESP(bus_space_handle_t hayespioh, struct com_softc *sc) 277 { 278 char val, dips; 279 int combaselist[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 }; 280 bus_space_tag_t iot = sc->sc_regs.cr_iot; 281 282 /* 283 * Hayes ESP cards have two iobases. One is for compatibility with 284 * 16550 serial chips, and at the same ISA PC base addresses. The 285 * other is for ESP-specific enhanced features, and lies at a 286 * different addressing range entirely (0x140, 0x180, 0x280, or 0x300). 287 */ 288 289 /* Test for ESP signature */ 290 if ((bus_space_read_1(iot, hayespioh, 0) & 0xf3) == 0) 291 return (0); 292 293 /* 294 * ESP is present at ESP enhanced base address; unknown com port 295 */ 296 297 /* Get the dip-switch configurations */ 298 bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS); 299 dips = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); 300 301 /* Determine which com port this ESP card services: bits 0,1 of */ 302 /* dips is the port # (0-3); combaselist[val] is the com_iobase */ 303 if (sc->sc_regs.cr_iobase != combaselist[dips & 0x03]) 304 return (0); 305 306 printf(": ESP"); 307 308 /* Check ESP Self Test bits. */ 309 /* Check for ESP version 2.0: bits 4,5,6 == 010 */ 310 bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETTEST); 311 val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); /* Clear reg1 */ 312 val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS2); 313 if ((val & 0x70) < 0x20) { 314 printf("-old (%o)", val & 0x70); 315 /* we do not support the necessary features */ 316 return (0); 317 } 318 319 /* Check for ability to emulate 16550: bit 8 == 1 */ 320 if ((dips & 0x80) == 0) { 321 printf(" slave"); 322 /* XXX Does slave really mean no 16550 support?? */ 323 return (0); 324 } 325 326 /* 327 * If we made it this far, we are a full-featured ESP v2.0 (or 328 * better), at the correct com port address. 329 */ 330 sc->sc_type = COM_TYPE_HAYESP; 331 sc->sc_hayespioh = hayespioh; 332 sc->sc_fifolen = 1024; 333 sc->sc_prescaler = 0; /* set prescaler to x1. */ 334 printf(", 1024 byte fifo\n"); 335 return (1); 336 } 337 #endif 338
Indexes created Fri Sep 26 20:09:58 GMT 2025