puc.c revision 1.5
1 /* $NetBSD: puc.c,v 1.5 2000/07/25 23:18:42 jeffs 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 struct puc_softc { 67 struct device sc_dev; 68 69 /* static configuration data */ 70 const struct puc_device_description *sc_desc; 71 72 /* card-global dynamic data */ 73 void *sc_ih; 74 struct { 75 int mapped; 76 bus_addr_t a; 77 bus_size_t s; 78 bus_space_tag_t t; 79 bus_space_handle_t h; 80 } sc_bar_mappings[6]; /* XXX constant */ 81 82 /* per-port dynamic data */ 83 struct { 84 struct device *dev; 85 86 /* filled in by port attachments */ 87 int (*ihand) __P((void *)); 88 void *ihandarg; 89 } sc_ports[PUC_MAX_PORTS]; 90 }; 91 92 int puc_match __P((struct device *, struct cfdata *, void *)); 93 void puc_attach __P((struct device *, struct device *, void *)); 94 int puc_print __P((void *, const char *)); 95 int puc_submatch __P((struct device *, struct cfdata *, void *)); 96 97 struct cfattach puc_ca = { 98 sizeof(struct puc_softc), puc_match, puc_attach 99 }; 100 101 const struct puc_device_description * 102 puc_find_description __P((pcireg_t, pcireg_t, pcireg_t, pcireg_t)); 103 static const char * 104 puc_port_type_name __P((int)); 105 106 int 107 puc_match(parent, match, aux) 108 struct device *parent; 109 struct cfdata *match; 110 void *aux; 111 { 112 struct pci_attach_args *pa = aux; 113 const struct puc_device_description *desc; 114 pcireg_t bhlc, subsys; 115 116 bhlc = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG); 117 if (PCI_HDRTYPE_TYPE(bhlc) != 0) 118 return (0); 119 120 subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 121 122 desc = puc_find_description(PCI_VENDOR(pa->pa_id), 123 PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 124 if (desc != NULL) 125 return (10); 126 127 #if 0 128 /* 129 * XXX this is obviously bogus. eventually, we might want 130 * XXX to match communications/modem, etc., but that needs some 131 * XXX special work in the match fn. 132 */ 133 /* 134 * Match class/subclass, so we can tell people to compile kernel 135 * with options that cause this driver to spew. 136 */ 137 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_COMMUNICATIONS && 138 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI) 139 return (1); 140 #endif 141 142 return (0); 143 } 144 145 void 146 puc_attach(parent, self, aux) 147 struct device *parent, *self; 148 void *aux; 149 { 150 struct puc_softc *sc = (struct puc_softc *)self; 151 struct pci_attach_args *pa = aux; 152 struct puc_attach_args paa; 153 pci_intr_handle_t intrhandle; 154 pcireg_t subsys; 155 int i, barindex; 156 bus_addr_t base; 157 bus_space_tag_t tag; 158 bus_space_handle_t ioh; 159 160 subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 161 sc->sc_desc = puc_find_description(PCI_VENDOR(pa->pa_id), 162 PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 163 if (sc->sc_desc == NULL) { 164 /* 165 * This was a class/subclass match, so tell people to compile 166 * kernel with options that cause this driver to spew. 167 */ 168 #ifdef PUC_PRINT_REGS 169 printf(":\n"); 170 pci_conf_print(pa->pa_pc, pa->pa_tag, NULL); 171 #else 172 printf(": unknown PCI communications device\n"); 173 printf("%s: compile kernel with PUC_PRINT_REGS and larger\n", 174 sc->sc_dev.dv_xname); 175 printf("%s: mesage buffer (via 'options MSGBUFSIZE=...'),\n", 176 sc->sc_dev.dv_xname); 177 printf("%s: and report the result with send-pr\n", 178 sc->sc_dev.dv_xname); 179 #endif 180 return; 181 } 182 183 printf(": %s (", sc->sc_desc->name); 184 for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) 185 printf("%s%s", i ? ", " : "", 186 puc_port_type_name(sc->sc_desc->ports[i].type)); 187 printf(")\n"); 188 189 for (i = 0; i < 6; i++) { 190 pcireg_t bar, type; 191 192 sc->sc_bar_mappings[i].mapped = 0; 193 194 bar = pci_conf_read(pa->pa_pc, pa->pa_tag, 195 PCI_MAPREG_START + 4 * i); /* XXX const */ 196 if (bar == 0) /* BAR not implemented(?) */ 197 continue; 198 199 type = (PCI_MAPREG_TYPE(bar) == PCI_MAPREG_TYPE_IO ? 200 PCI_MAPREG_TYPE_IO : PCI_MAPREG_MEM_TYPE(bar)); 201 202 if (type == PCI_MAPREG_TYPE_IO) { 203 tag = pa->pa_iot; 204 base = PCI_MAPREG_IO_ADDR(bar); 205 } else { 206 tag = pa->pa_memt; 207 base = PCI_MAPREG_MEM_ADDR(bar); 208 } 209 if (com_is_console(tag, base, &ioh)) { 210 sc->sc_bar_mappings[i].mapped = 1; 211 sc->sc_bar_mappings[i].a = base; 212 sc->sc_bar_mappings[i].s = COM_NPORTS; 213 sc->sc_bar_mappings[i].t = tag; 214 sc->sc_bar_mappings[i].h = ioh; 215 continue; 216 } 217 sc->sc_bar_mappings[i].mapped = (pci_mapreg_map(pa, 218 PCI_MAPREG_START + 4 * i, type, 0, 219 &sc->sc_bar_mappings[i].t, &sc->sc_bar_mappings[i].h, 220 &sc->sc_bar_mappings[i].a, &sc->sc_bar_mappings[i].s) 221 == 0); 222 if (sc->sc_bar_mappings[i].mapped) 223 continue; 224 225 printf("%s: couldn't map BAR at offset 0x%lx\n", 226 sc->sc_dev.dv_xname, (long)(PCI_MAPREG_START + 4 * i)); 227 } 228 229 /* Map interrupt. */ 230 if (pci_intr_map(pa->pa_pc, pa->pa_intrtag, pa->pa_intrpin, 231 pa->pa_intrline, &intrhandle)) { 232 printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname); 233 return; 234 } 235 /* 236 * XXX the sub-devices establish the interrupts, for the 237 * XXX following reasons: 238 * XXX 239 * XXX * we can't really know what IPLs they'd want 240 * XXX 241 * XXX * the MD dispatching code can ("should") dispatch 242 * XXX chained interrupts better than we can. 243 * XXX 244 * XXX It would be nice if we could indicate to the MD interrupt 245 * XXX handling code that the interrupt line used by the device 246 * XXX was a PCI (level triggered) interrupt. 247 * XXX 248 * XXX It's not pretty, but hey, what is? 249 */ 250 251 /* Configure each port. */ 252 for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) { 253 bus_space_handle_t subregion_handle; 254 255 /* make sure the base address register is mapped */ 256 barindex = PUC_PORT_BAR_INDEX(sc->sc_desc->ports[i].bar); 257 if (!sc->sc_bar_mappings[barindex].mapped) { 258 printf("%s: %s port uses unmapped BAR (0x%x)\n", 259 sc->sc_dev.dv_xname, 260 puc_port_type_name(sc->sc_desc->ports[i].type), 261 sc->sc_desc->ports[i].bar); 262 continue; 263 } 264 265 /* set up to configure the child device */ 266 paa.port = i; 267 paa.type = sc->sc_desc->ports[i].type; 268 paa.pc = pa->pa_pc; 269 paa.intrhandle = intrhandle; 270 paa.a = sc->sc_bar_mappings[barindex].a; 271 paa.t = sc->sc_bar_mappings[barindex].t; 272 273 if (!com_is_console(sc->sc_bar_mappings[barindex].t, 274 sc->sc_bar_mappings[barindex].a, &subregion_handle) 275 && bus_space_subregion(sc->sc_bar_mappings[barindex].t, 276 sc->sc_bar_mappings[barindex].h, 277 sc->sc_desc->ports[i].offset, 278 sc->sc_bar_mappings[barindex].s - 279 sc->sc_desc->ports[i].offset, 280 &subregion_handle) != 0) { 281 printf("%s: couldn't get subregion for port %d\n", 282 sc->sc_dev.dv_xname, i); 283 continue; 284 } 285 paa.h = subregion_handle; 286 287 #if 0 288 printf("%s: port %d: %s @ (index %d) 0x%x (0x%lx, 0x%lx)\n", 289 sc->sc_dev.dv_xname, paa.port, 290 puc_port_type_name(paa.type), barindex, (int)paa.a, 291 (long)paa.t, (long)paa.h); 292 #endif 293 294 /* and configure it */ 295 sc->sc_ports[i].dev = config_found_sm(self, &paa, puc_print, 296 puc_submatch); 297 } 298 } 299 300 int 301 puc_print(aux, pnp) 302 void *aux; 303 const char *pnp; 304 { 305 struct puc_attach_args *paa = aux; 306 307 if (pnp) 308 printf("%s at %s", puc_port_type_name(paa->type), pnp); 309 printf(" port %d", paa->port); 310 return (UNCONF); 311 } 312 313 int 314 puc_submatch(parent, cf, aux) 315 struct device *parent; 316 struct cfdata *cf; 317 void *aux; 318 { 319 struct puc_attach_args *aa = aux; 320 321 if (cf->cf_loc[PUCCF_PORT] != PUCCF_PORT_DEFAULT && 322 cf->cf_loc[PUCCF_PORT] != aa->port) 323 return 0; 324 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 325 } 326 327 const struct puc_device_description * 328 puc_find_description(vend, prod, svend, sprod) 329 pcireg_t vend, prod, svend, sprod; 330 { 331 int i; 332 333 #define checkreg(val, index) \ 334 (((val) & puc_devices[i].rmask[(index)]) == puc_devices[i].rval[(index)]) 335 336 for (i = 0; puc_devices[i].name != NULL; i++) { 337 if (checkreg(vend, PUC_REG_VEND) && 338 checkreg(prod, PUC_REG_PROD) && 339 checkreg(svend, PUC_REG_SVEND) && 340 checkreg(sprod, PUC_REG_SPROD)) 341 return (&puc_devices[i]); 342 } 343 344 #undef checkreg 345 346 return (NULL); 347 } 348 349 static const char * 350 puc_port_type_name(type) 351 int type; 352 { 353 354 switch (type) { 355 case PUC_PORT_TYPE_COM: 356 return "com"; 357 case PUC_PORT_TYPE_LPT: 358 return "lpt"; 359 default: 360 panic("puc_port_type_name %d", type); 361 } 362 } 363
Indexes created Fri Sep 26 20:09:58 GMT 2025