puc.c revision 1.12
1/* $NetBSD: puc.c,v 1.12 2001/11/13 07:48:48 lukem 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/cdefs.h> 56__KERNEL_RCSID(0, "$NetBSD: puc.c,v 1.12 2001/11/13 07:48:48 lukem Exp $"); 57 58#include <sys/param.h> 59#include <sys/systm.h> 60#include <sys/device.h> 61 62#include <dev/pci/pcireg.h> 63#include <dev/pci/pcivar.h> 64#include <dev/pci/pucvar.h> 65#include <sys/termios.h> 66#include <dev/ic/comreg.h> 67#include <dev/ic/comvar.h> 68 69#include "opt_puccn.h" 70 71struct puc_softc { 72 struct device sc_dev; 73 74 /* static configuration data */ 75 const struct puc_device_description *sc_desc; 76 77 /* card-global dynamic data */ 78 void *sc_ih; 79 struct { 80 int mapped; 81 bus_addr_t a; 82 bus_size_t s; 83 bus_space_tag_t t; 84 bus_space_handle_t h; 85 } sc_bar_mappings[6]; /* XXX constant */ 86 87 /* per-port dynamic data */ 88 struct { 89 struct device *dev; 90 91 /* filled in by port attachments */ 92 int (*ihand) __P((void *)); 93 void *ihandarg; 94 } sc_ports[PUC_MAX_PORTS]; 95}; 96 97int puc_match __P((struct device *, struct cfdata *, void *)); 98void puc_attach __P((struct device *, struct device *, void *)); 99int puc_print __P((void *, const char *)); 100int puc_submatch __P((struct device *, struct cfdata *, void *)); 101 102struct cfattach puc_ca = { 103 sizeof(struct puc_softc), puc_match, puc_attach 104}; 105 106const struct puc_device_description * 107 puc_find_description __P((pcireg_t, pcireg_t, pcireg_t, pcireg_t)); 108static const char * 109 puc_port_type_name __P((int)); 110 111int 112puc_match(parent, match, aux) 113 struct device *parent; 114 struct cfdata *match; 115 void *aux; 116{ 117 struct pci_attach_args *pa = aux; 118 const struct puc_device_description *desc; 119 pcireg_t bhlc, subsys; 120 121 bhlc = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG); 122 if (PCI_HDRTYPE_TYPE(bhlc) != 0) 123 return (0); 124 125 subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 126 127 desc = puc_find_description(PCI_VENDOR(pa->pa_id), 128 PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 129 if (desc != NULL) 130 return (10); 131 132#if 0 133 /* 134 * XXX this is obviously bogus. eventually, we might want 135 * XXX to match communications/modem, etc., but that needs some 136 * XXX special work in the match fn. 137 */ 138 /* 139 * Match class/subclass, so we can tell people to compile kernel 140 * with options that cause this driver to spew. 141 */ 142 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_COMMUNICATIONS) { 143 switch (PCI_SUBCLASS(pa->pa_class)) { 144 case PCI_SUBCLASS_COMMUNICATIONS_SERIAL: 145 case PCI_SUBCLASS_COMMUNICATIONS_MODEM: 146 return (1); 147 } 148 } 149#endif 150 151 return (0); 152} 153 154void 155puc_attach(parent, self, aux) 156 struct device *parent, *self; 157 void *aux; 158{ 159 struct puc_softc *sc = (struct puc_softc *)self; 160 struct pci_attach_args *pa = aux; 161 struct puc_attach_args paa; 162 pci_intr_handle_t intrhandle; 163 pcireg_t subsys; 164 int i, barindex; 165 bus_addr_t base; 166 bus_space_tag_t tag; 167#ifdef PUCCN 168 bus_space_handle_t ioh; 169#endif 170 171 subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 172 sc->sc_desc = puc_find_description(PCI_VENDOR(pa->pa_id), 173 PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 174 if (sc->sc_desc == NULL) { 175 /* 176 * This was a class/subclass match, so tell people to compile 177 * kernel with options that cause this driver to spew. 178 */ 179#ifdef PUC_PRINT_REGS 180 printf(":\n"); 181 pci_conf_print(pa->pa_pc, pa->pa_tag, NULL); 182#else 183 printf(": unknown PCI communications device\n"); 184 printf("%s: compile kernel with PUC_PRINT_REGS and larger\n", 185 sc->sc_dev.dv_xname); 186 printf("%s: mesage buffer (via 'options MSGBUFSIZE=...'),\n", 187 sc->sc_dev.dv_xname); 188 printf("%s: and report the result with send-pr\n", 189 sc->sc_dev.dv_xname); 190#endif 191 return; 192 } 193 194 printf(": %s (", sc->sc_desc->name); 195 for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) 196 printf("%s%s", i ? ", " : "", 197 puc_port_type_name(sc->sc_desc->ports[i].type)); 198 printf(")\n"); 199 200 for (i = 0; i < 6; i++) { 201 pcireg_t bar, type; 202 203 sc->sc_bar_mappings[i].mapped = 0; 204 205 bar = pci_conf_read(pa->pa_pc, pa->pa_tag, 206 PCI_MAPREG_START + 4 * i); /* XXX const */ 207 if (bar == 0) /* BAR not implemented(?) */ 208 continue; 209 210 type = (PCI_MAPREG_TYPE(bar) == PCI_MAPREG_TYPE_IO ? 211 PCI_MAPREG_TYPE_IO : PCI_MAPREG_MEM_TYPE(bar)); 212 213 if (type == PCI_MAPREG_TYPE_IO) { 214 tag = pa->pa_iot; 215 base = PCI_MAPREG_IO_ADDR(bar); 216 } else { 217 tag = pa->pa_memt; 218 base = PCI_MAPREG_MEM_ADDR(bar); 219 } 220#ifdef PUCCN 221 if (com_is_console(tag, base, &ioh)) { 222 sc->sc_bar_mappings[i].mapped = 1; 223 sc->sc_bar_mappings[i].a = base; 224 sc->sc_bar_mappings[i].s = COM_NPORTS; 225 sc->sc_bar_mappings[i].t = tag; 226 sc->sc_bar_mappings[i].h = ioh; 227 continue; 228 } 229#endif 230 sc->sc_bar_mappings[i].mapped = (pci_mapreg_map(pa, 231 PCI_MAPREG_START + 4 * i, type, 0, 232 &sc->sc_bar_mappings[i].t, &sc->sc_bar_mappings[i].h, 233 &sc->sc_bar_mappings[i].a, &sc->sc_bar_mappings[i].s) 234 == 0); 235 if (sc->sc_bar_mappings[i].mapped) 236 continue; 237 238 printf("%s: couldn't map BAR at offset 0x%lx\n", 239 sc->sc_dev.dv_xname, (long)(PCI_MAPREG_START + 4 * i)); 240 } 241 242 /* Map interrupt. */ 243 if (pci_intr_map(pa, &intrhandle)) { 244 printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname); 245 return; 246 } 247 /* 248 * XXX the sub-devices establish the interrupts, for the 249 * XXX following reasons: 250 * XXX 251 * XXX * we can't really know what IPLs they'd want 252 * XXX 253 * XXX * the MD dispatching code can ("should") dispatch 254 * XXX chained interrupts better than we can. 255 * XXX 256 * XXX It would be nice if we could indicate to the MD interrupt 257 * XXX handling code that the interrupt line used by the device 258 * XXX was a PCI (level triggered) interrupt. 259 * XXX 260 * XXX It's not pretty, but hey, what is? 261 */ 262 263 /* Configure each port. */ 264 for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) { 265 bus_space_handle_t subregion_handle; 266 267 /* make sure the base address register is mapped */ 268 barindex = PUC_PORT_BAR_INDEX(sc->sc_desc->ports[i].bar); 269 if (!sc->sc_bar_mappings[barindex].mapped) { 270 printf("%s: %s port uses unmapped BAR (0x%x)\n", 271 sc->sc_dev.dv_xname, 272 puc_port_type_name(sc->sc_desc->ports[i].type), 273 sc->sc_desc->ports[i].bar); 274 continue; 275 } 276 277 /* set up to configure the child device */ 278 paa.port = i; 279 paa.type = sc->sc_desc->ports[i].type; 280 paa.flags = sc->sc_desc->ports[i].flags; 281 paa.pc = pa->pa_pc; 282 paa.intrhandle = intrhandle; 283 paa.a = sc->sc_bar_mappings[barindex].a; 284 paa.t = sc->sc_bar_mappings[barindex].t; 285 286 if ( 287#ifdef PUCCN 288 !com_is_console(sc->sc_bar_mappings[barindex].t, 289 sc->sc_bar_mappings[barindex].a, &subregion_handle) 290 && 291#endif 292 bus_space_subregion(sc->sc_bar_mappings[barindex].t, 293 sc->sc_bar_mappings[barindex].h, 294 sc->sc_desc->ports[i].offset, 295 sc->sc_bar_mappings[barindex].s - 296 sc->sc_desc->ports[i].offset, 297 &subregion_handle) != 0) { 298 printf("%s: couldn't get subregion for port %d\n", 299 sc->sc_dev.dv_xname, i); 300 continue; 301 } 302 paa.h = subregion_handle; 303 304#if 0 305 printf("%s: port %d: %s @ (index %d) 0x%x (0x%lx, 0x%lx)\n", 306 sc->sc_dev.dv_xname, paa.port, 307 puc_port_type_name(paa.type), barindex, (int)paa.a, 308 (long)paa.t, (long)paa.h); 309#endif 310 311 /* and configure it */ 312 sc->sc_ports[i].dev = config_found_sm(self, &paa, puc_print, 313 puc_submatch); 314 } 315} 316 317int 318puc_print(aux, pnp) 319 void *aux; 320 const char *pnp; 321{ 322 struct puc_attach_args *paa = aux; 323 324 if (pnp) 325 printf("%s at %s", puc_port_type_name(paa->type), pnp); 326 printf(" port %d", paa->port); 327 return (UNCONF); 328} 329 330int 331puc_submatch(parent, cf, aux) 332 struct device *parent; 333 struct cfdata *cf; 334 void *aux; 335{ 336 struct puc_attach_args *aa = aux; 337 338 if (cf->cf_loc[PUCCF_PORT] != PUCCF_PORT_DEFAULT && 339 cf->cf_loc[PUCCF_PORT] != aa->port) 340 return 0; 341 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 342} 343 344const struct puc_device_description * 345puc_find_description(vend, prod, svend, sprod) 346 pcireg_t vend, prod, svend, sprod; 347{ 348 int i; 349 350#define checkreg(val, index) \ 351 (((val) & puc_devices[i].rmask[(index)]) == puc_devices[i].rval[(index)]) 352 353 for (i = 0; puc_devices[i].name != NULL; i++) { 354 if (checkreg(vend, PUC_REG_VEND) && 355 checkreg(prod, PUC_REG_PROD) && 356 checkreg(svend, PUC_REG_SVEND) && 357 checkreg(sprod, PUC_REG_SPROD)) 358 return (&puc_devices[i]); 359 } 360 361#undef checkreg 362 363 return (NULL); 364} 365 366static const char * 367puc_port_type_name(type) 368 int type; 369{ 370 371 switch (type) { 372 case PUC_PORT_TYPE_COM: 373 return "com"; 374 case PUC_PORT_TYPE_LPT: 375 return "lpt"; 376 default: 377 panic("puc_port_type_name %d", type); 378 } 379} 380