puc.c revision 1.25
1 /* $NetBSD: puc.c,v 1.25 2005/08/25 18:35:39 drochner 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 1.25 2005/08/25 18:35:39 drochner 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 "locators.h" 70 #include "opt_puccn.h" 71 72 struct puc_softc { 73 struct device sc_dev; 74 75 /* static configuration data */ 76 const struct puc_device_description *sc_desc; 77 78 /* card-global dynamic data */ 79 void *sc_ih; 80 struct { 81 int mapped; 82 bus_addr_t a; 83 bus_size_t s; 84 bus_space_tag_t t; 85 bus_space_handle_t h; 86 } sc_bar_mappings[6]; /* XXX constant */ 87 88 /* per-port dynamic data */ 89 struct { 90 struct device *dev; 91 92 /* filled in by port attachments */ 93 int (*ihand)(void *); 94 void *ihandarg; 95 } sc_ports[PUC_MAX_PORTS]; 96 }; 97 98 static int puc_print(void *, const char *); 99 static int puc_submatch(struct device *, struct cfdata *, 100 const locdesc_t *, void *); 101 102 static const char *puc_port_type_name(int); 103 104 static int 105 puc_match(struct device *parent, struct cfdata *match, void *aux) 106 { 107 struct pci_attach_args *pa = aux; 108 const struct puc_device_description *desc; 109 pcireg_t bhlc, subsys; 110 111 bhlc = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG); 112 if (PCI_HDRTYPE_TYPE(bhlc) != 0) 113 return (0); 114 115 subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 116 117 desc = puc_find_description(PCI_VENDOR(pa->pa_id), 118 PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 119 if (desc != NULL) 120 return (10); 121 122 #if 0 123 /* 124 * XXX this is obviously bogus. eventually, we might want 125 * XXX to match communications/modem, etc., but that needs some 126 * XXX special work in the match fn. 127 */ 128 /* 129 * Match class/subclass, so we can tell people to compile kernel 130 * with options that cause this driver to spew. 131 */ 132 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_COMMUNICATIONS) { 133 switch (PCI_SUBCLASS(pa->pa_class)) { 134 case PCI_SUBCLASS_COMMUNICATIONS_SERIAL: 135 case PCI_SUBCLASS_COMMUNICATIONS_MODEM: 136 return (1); 137 } 138 } 139 #endif 140 141 return (0); 142 } 143 144 static void 145 puc_attach(struct device *parent, struct device *self, void *aux) 146 { 147 struct puc_softc *sc = (struct puc_softc *)self; 148 struct pci_attach_args *pa = aux; 149 struct puc_attach_args paa; 150 pci_intr_handle_t intrhandle; 151 pcireg_t subsys; 152 int i, barindex; 153 bus_addr_t base; 154 bus_space_tag_t tag; 155 #ifdef PUCCN 156 bus_space_handle_t ioh; 157 #endif 158 int locs[PUCCF_NLOCS]; 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 #ifdef PUCCN 210 if (com_is_console(tag, base, &ioh)) { 211 sc->sc_bar_mappings[i].mapped = 1; 212 sc->sc_bar_mappings[i].a = base; 213 sc->sc_bar_mappings[i].s = COM_NPORTS; 214 sc->sc_bar_mappings[i].t = tag; 215 sc->sc_bar_mappings[i].h = ioh; 216 continue; 217 } 218 #endif 219 sc->sc_bar_mappings[i].mapped = (pci_mapreg_map(pa, 220 PCI_MAPREG_START + 4 * i, type, 0, 221 &sc->sc_bar_mappings[i].t, &sc->sc_bar_mappings[i].h, 222 &sc->sc_bar_mappings[i].a, &sc->sc_bar_mappings[i].s) 223 == 0); 224 if (sc->sc_bar_mappings[i].mapped) 225 continue; 226 227 printf("%s: couldn't map BAR at offset 0x%lx\n", 228 sc->sc_dev.dv_xname, (long)(PCI_MAPREG_START + 4 * i)); 229 } 230 231 /* Map interrupt. */ 232 if (pci_intr_map(pa, &intrhandle)) { 233 printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname); 234 return; 235 } 236 /* 237 * XXX the sub-devices establish the interrupts, for the 238 * XXX following reasons: 239 * XXX 240 * XXX * we can't really know what IPLs they'd want 241 * XXX 242 * XXX * the MD dispatching code can ("should") dispatch 243 * XXX chained interrupts better than we can. 244 * XXX 245 * XXX It would be nice if we could indicate to the MD interrupt 246 * XXX handling code that the interrupt line used by the device 247 * XXX was a PCI (level triggered) interrupt. 248 * XXX 249 * XXX It's not pretty, but hey, what is? 250 */ 251 252 /* Configure each port. */ 253 for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) { 254 bus_space_handle_t subregion_handle; 255 256 /* make sure the base address register is mapped */ 257 barindex = PUC_PORT_BAR_INDEX(sc->sc_desc->ports[i].bar); 258 if (!sc->sc_bar_mappings[barindex].mapped) { 259 printf("%s: %s port uses unmapped BAR (0x%x)\n", 260 sc->sc_dev.dv_xname, 261 puc_port_type_name(sc->sc_desc->ports[i].type), 262 sc->sc_desc->ports[i].bar); 263 continue; 264 } 265 266 /* set up to configure the child device */ 267 paa.port = i; 268 paa.type = sc->sc_desc->ports[i].type; 269 paa.flags = sc->sc_desc->ports[i].flags; 270 paa.pc = pa->pa_pc; 271 paa.tag = pa->pa_tag; 272 paa.intrhandle = intrhandle; 273 paa.a = sc->sc_bar_mappings[barindex].a; 274 paa.t = sc->sc_bar_mappings[barindex].t; 275 paa.dmat = pa->pa_dmat; 276 paa.dmat64 = pa->pa_dmat64; 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 locs[PUCCF_PORT] = i; 304 305 /* and configure it */ 306 sc->sc_ports[i].dev = config_found_sm_loc(self, "puc", locs, 307 &paa, puc_print, puc_submatch); 308 } 309 } 310 311 CFATTACH_DECL(puc, sizeof(struct puc_softc), 312 puc_match, puc_attach, NULL, NULL); 313 314 static int 315 puc_print(void *aux, const char *pnp) 316 { 317 struct puc_attach_args *paa = aux; 318 319 if (pnp) 320 aprint_normal("%s at %s", puc_port_type_name(paa->type), pnp); 321 aprint_normal(" port %d", paa->port); 322 return (UNCONF); 323 } 324 325 static int 326 puc_submatch(struct device *parent, struct cfdata *cf, 327 const locdesc_t *locs, void *aux) 328 { 329 330 if (cf->cf_loc[PUCCF_PORT] != PUCCF_PORT_DEFAULT && 331 cf->cf_loc[PUCCF_PORT] != locs[PUCCF_PORT]) 332 return 0; 333 334 return (config_match(parent, cf, aux)); 335 } 336 337 const struct puc_device_description * 338 puc_find_description(pcireg_t vend, pcireg_t prod, pcireg_t svend, 339 pcireg_t sprod) 340 { 341 int i; 342 343 #define checkreg(val, index) \ 344 (((val) & puc_devices[i].rmask[(index)]) == puc_devices[i].rval[(index)]) 345 346 for (i = 0; puc_devices[i].name != NULL; i++) { 347 if (checkreg(vend, PUC_REG_VEND) && 348 checkreg(prod, PUC_REG_PROD) && 349 checkreg(svend, PUC_REG_SVEND) && 350 checkreg(sprod, PUC_REG_SPROD)) 351 return (&puc_devices[i]); 352 } 353 354 #undef checkreg 355 356 return (NULL); 357 } 358 359 static const char * 360 puc_port_type_name(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 Sat Sep 27 14:09:57 GMT 2025