puc.c revision 1.9
1 /* $NetBSD: puc.c,v 1.9 2000/12/28 22:59:15 sommerfeld Exp $ */ 2 3 /* 4 * Copyright (c) 1996, 1998, 1999 5 * Christopher G. Demetriou. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Christopher G. Demetriou 18 * for the NetBSD Project. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * PCI "universal" communication card device driver, glues com, lpt, 36 * and similar ports to PCI via bridge chip often much larger than 37 * the devices being glued. 38 * 39 * Author: Christopher G. Demetriou, May 14, 1998 (derived from NetBSD 40 * sys/dev/pci/pciide.c, revision 1.6). 41 * 42 * These devices could be (and some times are) described as 43 * communications/{serial,parallel}, etc. devices with known 44 * programming interfaces, but those programming interfaces (in 45 * particular the BAR assignments for devices, etc.) in fact are not 46 * particularly well defined. 47 * 48 * After I/we have seen more of these devices, it may be possible 49 * to generalize some of these bits. In particular, devices which 50 * describe themselves as communications/serial/16[45]50, and 51 * communications/parallel/??? might be attached via direct 52 * 'com' and 'lpt' attachments to pci. 53 */ 54 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/device.h> 58 59 #include <dev/pci/pcireg.h> 60 #include <dev/pci/pcivar.h> 61 #include <dev/pci/pucvar.h> 62 #include <sys/termios.h> 63 #include <dev/ic/comreg.h> 64 #include <dev/ic/comvar.h> 65 66 #include "opt_puccn.h" 67 68 struct puc_softc { 69 struct device sc_dev; 70 71 /* static configuration data */ 72 const struct puc_device_description *sc_desc; 73 74 /* card-global dynamic data */ 75 void *sc_ih; 76 struct { 77 int mapped; 78 bus_addr_t a; 79 bus_size_t s; 80 bus_space_tag_t t; 81 bus_space_handle_t h; 82 } sc_bar_mappings[6]; /* XXX constant */ 83 84 /* per-port dynamic data */ 85 struct { 86 struct device *dev; 87 88 /* filled in by port attachments */ 89 int (*ihand) __P((void *)); 90 void *ihandarg; 91 } sc_ports[PUC_MAX_PORTS]; 92 }; 93 94 int puc_match __P((struct device *, struct cfdata *, void *)); 95 void puc_attach __P((struct device *, struct device *, void *)); 96 int puc_print __P((void *, const char *)); 97 int puc_submatch __P((struct device *, struct cfdata *, void *)); 98 99 struct cfattach puc_ca = { 100 sizeof(struct puc_softc), puc_match, puc_attach 101 }; 102 103 const struct puc_device_description * 104 puc_find_description __P((pcireg_t, pcireg_t, pcireg_t, pcireg_t)); 105 static const char * 106 puc_port_type_name __P((int)); 107 108 int 109 puc_match(parent, match, aux) 110 struct device *parent; 111 struct cfdata *match; 112 void *aux; 113 { 114 struct pci_attach_args *pa = aux; 115 const struct puc_device_description *desc; 116 pcireg_t bhlc, subsys; 117 118 bhlc = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG); 119 if (PCI_HDRTYPE_TYPE(bhlc) != 0) 120 return (0); 121 122 subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 123 124 desc = puc_find_description(PCI_VENDOR(pa->pa_id), 125 PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 126 if (desc != NULL) 127 return (10); 128 129 #if 0 130 /* 131 * XXX this is obviously bogus. eventually, we might want 132 * XXX to match communications/modem, etc., but that needs some 133 * XXX special work in the match fn. 134 */ 135 /* 136 * Match class/subclass, so we can tell people to compile kernel 137 * with options that cause this driver to spew. 138 */ 139 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_COMMUNICATIONS && 140 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI) 141 return (1); 142 #endif 143 144 return (0); 145 } 146 147 void 148 puc_attach(parent, self, aux) 149 struct device *parent, *self; 150 void *aux; 151 { 152 struct puc_softc *sc = (struct puc_softc *)self; 153 struct pci_attach_args *pa = aux; 154 struct puc_attach_args paa; 155 pci_intr_handle_t intrhandle; 156 pcireg_t subsys; 157 int i, barindex; 158 bus_addr_t base; 159 bus_space_tag_t tag; 160 #ifdef PUCCN 161 bus_space_handle_t ioh; 162 #endif 163 164 subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 165 sc->sc_desc = puc_find_description(PCI_VENDOR(pa->pa_id), 166 PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 167 if (sc->sc_desc == NULL) { 168 /* 169 * This was a class/subclass match, so tell people to compile 170 * kernel with options that cause this driver to spew. 171 */ 172 #ifdef PUC_PRINT_REGS 173 printf(":\n"); 174 pci_conf_print(pa->pa_pc, pa->pa_tag, NULL); 175 #else 176 printf(": unknown PCI communications device\n"); 177 printf("%s: compile kernel with PUC_PRINT_REGS and larger\n", 178 sc->sc_dev.dv_xname); 179 printf("%s: mesage buffer (via 'options MSGBUFSIZE=...'),\n", 180 sc->sc_dev.dv_xname); 181 printf("%s: and report the result with send-pr\n", 182 sc->sc_dev.dv_xname); 183 #endif 184 return; 185 } 186 187 printf(": %s (", sc->sc_desc->name); 188 for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) 189 printf("%s%s", i ? ", " : "", 190 puc_port_type_name(sc->sc_desc->ports[i].type)); 191 printf(")\n"); 192 193 for (i = 0; i < 6; i++) { 194 pcireg_t bar, type; 195 196 sc->sc_bar_mappings[i].mapped = 0; 197 198 bar = pci_conf_read(pa->pa_pc, pa->pa_tag, 199 PCI_MAPREG_START + 4 * i); /* XXX const */ 200 if (bar == 0) /* BAR not implemented(?) */ 201 continue; 202 203 type = (PCI_MAPREG_TYPE(bar) == PCI_MAPREG_TYPE_IO ? 204 PCI_MAPREG_TYPE_IO : PCI_MAPREG_MEM_TYPE(bar)); 205 206 if (type == PCI_MAPREG_TYPE_IO) { 207 tag = pa->pa_iot; 208 base = PCI_MAPREG_IO_ADDR(bar); 209 } else { 210 tag = pa->pa_memt; 211 base = PCI_MAPREG_MEM_ADDR(bar); 212 } 213 #ifdef PUCCN 214 if (com_is_console(tag, base, &ioh)) { 215 sc->sc_bar_mappings[i].mapped = 1; 216 sc->sc_bar_mappings[i].a = base; 217 sc->sc_bar_mappings[i].s = COM_NPORTS; 218 sc->sc_bar_mappings[i].t = tag; 219 sc->sc_bar_mappings[i].h = ioh; 220 continue; 221 } 222 #endif 223 sc->sc_bar_mappings[i].mapped = (pci_mapreg_map(pa, 224 PCI_MAPREG_START + 4 * i, type, 0, 225 &sc->sc_bar_mappings[i].t, &sc->sc_bar_mappings[i].h, 226 &sc->sc_bar_mappings[i].a, &sc->sc_bar_mappings[i].s) 227 == 0); 228 if (sc->sc_bar_mappings[i].mapped) 229 continue; 230 231 printf("%s: couldn't map BAR at offset 0x%lx\n", 232 sc->sc_dev.dv_xname, (long)(PCI_MAPREG_START + 4 * i)); 233 } 234 235 /* Map interrupt. */ 236 if (pci_intr_map(pa, &intrhandle)) { 237 printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname); 238 return; 239 } 240 /* 241 * XXX the sub-devices establish the interrupts, for the 242 * XXX following reasons: 243 * XXX 244 * XXX * we can't really know what IPLs they'd want 245 * XXX 246 * XXX * the MD dispatching code can ("should") dispatch 247 * XXX chained interrupts better than we can. 248 * XXX 249 * XXX It would be nice if we could indicate to the MD interrupt 250 * XXX handling code that the interrupt line used by the device 251 * XXX was a PCI (level triggered) interrupt. 252 * XXX 253 * XXX It's not pretty, but hey, what is? 254 */ 255 256 /* Configure each port. */ 257 for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) { 258 bus_space_handle_t subregion_handle; 259 260 /* make sure the base address register is mapped */ 261 barindex = PUC_PORT_BAR_INDEX(sc->sc_desc->ports[i].bar); 262 if (!sc->sc_bar_mappings[barindex].mapped) { 263 printf("%s: %s port uses unmapped BAR (0x%x)\n", 264 sc->sc_dev.dv_xname, 265 puc_port_type_name(sc->sc_desc->ports[i].type), 266 sc->sc_desc->ports[i].bar); 267 continue; 268 } 269 270 /* set up to configure the child device */ 271 paa.port = i; 272 paa.type = sc->sc_desc->ports[i].type; 273 paa.pc = pa->pa_pc; 274 paa.intrhandle = intrhandle; 275 paa.a = sc->sc_bar_mappings[barindex].a; 276 paa.t = sc->sc_bar_mappings[barindex].t; 277 278 if ( 279 #ifdef PUCCN 280 !com_is_console(sc->sc_bar_mappings[barindex].t, 281 sc->sc_bar_mappings[barindex].a, &subregion_handle) 282 && 283 #endif 284 bus_space_subregion(sc->sc_bar_mappings[barindex].t, 285 sc->sc_bar_mappings[barindex].h, 286 sc->sc_desc->ports[i].offset, 287 sc->sc_bar_mappings[barindex].s - 288 sc->sc_desc->ports[i].offset, 289 &subregion_handle) != 0) { 290 printf("%s: couldn't get subregion for port %d\n", 291 sc->sc_dev.dv_xname, i); 292 continue; 293 } 294 paa.h = subregion_handle; 295 296 #if 0 297 printf("%s: port %d: %s @ (index %d) 0x%x (0x%lx, 0x%lx)\n", 298 sc->sc_dev.dv_xname, paa.port, 299 puc_port_type_name(paa.type), barindex, (int)paa.a, 300 (long)paa.t, (long)paa.h); 301 #endif 302 303 /* and configure it */ 304 sc->sc_ports[i].dev = config_found_sm(self, &paa, puc_print, 305 puc_submatch); 306 } 307 } 308 309 int 310 puc_print(aux, pnp) 311 void *aux; 312 const char *pnp; 313 { 314 struct puc_attach_args *paa = aux; 315 316 if (pnp) 317 printf("%s at %s", puc_port_type_name(paa->type), pnp); 318 printf(" port %d", paa->port); 319 return (UNCONF); 320 } 321 322 int 323 puc_submatch(parent, cf, aux) 324 struct device *parent; 325 struct cfdata *cf; 326 void *aux; 327 { 328 struct puc_attach_args *aa = aux; 329 330 if (cf->cf_loc[PUCCF_PORT] != PUCCF_PORT_DEFAULT && 331 cf->cf_loc[PUCCF_PORT] != aa->port) 332 return 0; 333 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 334 } 335 336 const struct puc_device_description * 337 puc_find_description(vend, prod, svend, sprod) 338 pcireg_t vend, prod, svend, sprod; 339 { 340 int i; 341 342 #define checkreg(val, index) \ 343 (((val) & puc_devices[i].rmask[(index)]) == puc_devices[i].rval[(index)]) 344 345 for (i = 0; puc_devices[i].name != NULL; i++) { 346 if (checkreg(vend, PUC_REG_VEND) && 347 checkreg(prod, PUC_REG_PROD) && 348 checkreg(svend, PUC_REG_SVEND) && 349 checkreg(sprod, PUC_REG_SPROD)) 350 return (&puc_devices[i]); 351 } 352 353 #undef checkreg 354 355 return (NULL); 356 } 357 358 static const char * 359 puc_port_type_name(type) 360 int type; 361 { 362 363 switch (type) { 364 case PUC_PORT_TYPE_COM: 365 return "com"; 366 case PUC_PORT_TYPE_LPT: 367 return "lpt"; 368 default: 369 panic("puc_port_type_name %d", type); 370 } 371 } 372
Indexes created Fri Sep 26 20:09:58 GMT 2025