puc.c revision 1.26
1 /* $NetBSD: puc.c,v 1.26 2005/08/26 11:20:33 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 1.26 2005/08/26 11:20:33 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 *); 99 100 static const char *puc_port_type_name(int); 101 102 static int 103 puc_match(struct device *parent, struct cfdata *match, void *aux) 104 { 105 struct pci_attach_args *pa = aux; 106 const struct puc_device_description *desc; 107 pcireg_t bhlc, subsys; 108 109 bhlc = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG); 110 if (PCI_HDRTYPE_TYPE(bhlc) != 0) 111 return (0); 112 113 subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 114 115 desc = puc_find_description(PCI_VENDOR(pa->pa_id), 116 PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 117 if (desc != NULL) 118 return (10); 119 120 #if 0 121 /* 122 * XXX this is obviously bogus. eventually, we might want 123 * XXX to match communications/modem, etc., but that needs some 124 * XXX special work in the match fn. 125 */ 126 /* 127 * Match class/subclass, so we can tell people to compile kernel 128 * with options that cause this driver to spew. 129 */ 130 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_COMMUNICATIONS) { 131 switch (PCI_SUBCLASS(pa->pa_class)) { 132 case PCI_SUBCLASS_COMMUNICATIONS_SERIAL: 133 case PCI_SUBCLASS_COMMUNICATIONS_MODEM: 134 return (1); 135 } 136 } 137 #endif 138 139 return (0); 140 } 141 142 static void 143 puc_attach(struct device *parent, struct device *self, void *aux) 144 { 145 struct puc_softc *sc = (struct puc_softc *)self; 146 struct pci_attach_args *pa = aux; 147 struct puc_attach_args paa; 148 pci_intr_handle_t intrhandle; 149 pcireg_t subsys; 150 int i, barindex; 151 bus_addr_t base; 152 bus_space_tag_t tag; 153 #ifdef PUCCN 154 bus_space_handle_t ioh; 155 #endif 156 int locs[PUCCF_NLOCS]; 157 158 subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 159 sc->sc_desc = puc_find_description(PCI_VENDOR(pa->pa_id), 160 PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 161 if (sc->sc_desc == NULL) { 162 /* 163 * This was a class/subclass match, so tell people to compile 164 * kernel with options that cause this driver to spew. 165 */ 166 #ifdef PUC_PRINT_REGS 167 printf(":\n"); 168 pci_conf_print(pa->pa_pc, pa->pa_tag, NULL); 169 #else 170 printf(": unknown PCI communications device\n"); 171 printf("%s: compile kernel with PUC_PRINT_REGS and larger\n", 172 sc->sc_dev.dv_xname); 173 printf("%s: mesage buffer (via 'options MSGBUFSIZE=...'),\n", 174 sc->sc_dev.dv_xname); 175 printf("%s: and report the result with send-pr\n", 176 sc->sc_dev.dv_xname); 177 #endif 178 return; 179 } 180 181 printf(": %s (", sc->sc_desc->name); 182 for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) 183 printf("%s%s", i ? ", " : "", 184 puc_port_type_name(sc->sc_desc->ports[i].type)); 185 printf(")\n"); 186 187 for (i = 0; i < 6; i++) { 188 pcireg_t bar, type; 189 190 sc->sc_bar_mappings[i].mapped = 0; 191 192 bar = pci_conf_read(pa->pa_pc, pa->pa_tag, 193 PCI_MAPREG_START + 4 * i); /* XXX const */ 194 if (bar == 0) /* BAR not implemented(?) */ 195 continue; 196 197 type = (PCI_MAPREG_TYPE(bar) == PCI_MAPREG_TYPE_IO ? 198 PCI_MAPREG_TYPE_IO : PCI_MAPREG_MEM_TYPE(bar)); 199 200 if (type == PCI_MAPREG_TYPE_IO) { 201 tag = pa->pa_iot; 202 base = PCI_MAPREG_IO_ADDR(bar); 203 } else { 204 tag = pa->pa_memt; 205 base = PCI_MAPREG_MEM_ADDR(bar); 206 } 207 #ifdef PUCCN 208 if (com_is_console(tag, base, &ioh)) { 209 sc->sc_bar_mappings[i].mapped = 1; 210 sc->sc_bar_mappings[i].a = base; 211 sc->sc_bar_mappings[i].s = COM_NPORTS; 212 sc->sc_bar_mappings[i].t = tag; 213 sc->sc_bar_mappings[i].h = ioh; 214 continue; 215 } 216 #endif 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, &intrhandle)) { 231 printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname); 232 return; 233 } 234 /* 235 * XXX the sub-devices establish the interrupts, for the 236 * XXX following reasons: 237 * XXX 238 * XXX * we can't really know what IPLs they'd want 239 * XXX 240 * XXX * the MD dispatching code can ("should") dispatch 241 * XXX chained interrupts better than we can. 242 * XXX 243 * XXX It would be nice if we could indicate to the MD interrupt 244 * XXX handling code that the interrupt line used by the device 245 * XXX was a PCI (level triggered) interrupt. 246 * XXX 247 * XXX It's not pretty, but hey, what is? 248 */ 249 250 /* Configure each port. */ 251 for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) { 252 bus_space_handle_t subregion_handle; 253 254 /* make sure the base address register is mapped */ 255 barindex = PUC_PORT_BAR_INDEX(sc->sc_desc->ports[i].bar); 256 if (!sc->sc_bar_mappings[barindex].mapped) { 257 printf("%s: %s port uses unmapped BAR (0x%x)\n", 258 sc->sc_dev.dv_xname, 259 puc_port_type_name(sc->sc_desc->ports[i].type), 260 sc->sc_desc->ports[i].bar); 261 continue; 262 } 263 264 /* set up to configure the child device */ 265 paa.port = i; 266 paa.type = sc->sc_desc->ports[i].type; 267 paa.flags = sc->sc_desc->ports[i].flags; 268 paa.pc = pa->pa_pc; 269 paa.tag = pa->pa_tag; 270 paa.intrhandle = intrhandle; 271 paa.a = sc->sc_bar_mappings[barindex].a; 272 paa.t = sc->sc_bar_mappings[barindex].t; 273 paa.dmat = pa->pa_dmat; 274 paa.dmat64 = pa->pa_dmat64; 275 276 if ( 277 #ifdef PUCCN 278 !com_is_console(sc->sc_bar_mappings[barindex].t, 279 sc->sc_bar_mappings[barindex].a, &subregion_handle) 280 && 281 #endif 282 bus_space_subregion(sc->sc_bar_mappings[barindex].t, 283 sc->sc_bar_mappings[barindex].h, 284 sc->sc_desc->ports[i].offset, 285 sc->sc_bar_mappings[barindex].s - 286 sc->sc_desc->ports[i].offset, 287 &subregion_handle) != 0) { 288 printf("%s: couldn't get subregion for port %d\n", 289 sc->sc_dev.dv_xname, i); 290 continue; 291 } 292 paa.h = subregion_handle; 293 294 #if 0 295 printf("%s: port %d: %s @ (index %d) 0x%x (0x%lx, 0x%lx)\n", 296 sc->sc_dev.dv_xname, paa.port, 297 puc_port_type_name(paa.type), barindex, (int)paa.a, 298 (long)paa.t, (long)paa.h); 299 #endif 300 301 locs[PUCCF_PORT] = i; 302 303 /* and configure it */ 304 sc->sc_ports[i].dev = config_found_sm_loc(self, "puc", locs, 305 &paa, puc_print, config_stdsubmatch); 306 } 307 } 308 309 CFATTACH_DECL(puc, sizeof(struct puc_softc), 310 puc_match, puc_attach, NULL, NULL); 311 312 static int 313 puc_print(void *aux, const char *pnp) 314 { 315 struct puc_attach_args *paa = aux; 316 317 if (pnp) 318 aprint_normal("%s at %s", puc_port_type_name(paa->type), pnp); 319 aprint_normal(" port %d", paa->port); 320 return (UNCONF); 321 } 322 323 const struct puc_device_description * 324 puc_find_description(pcireg_t vend, pcireg_t prod, pcireg_t svend, 325 pcireg_t sprod) 326 { 327 int i; 328 329 #define checkreg(val, index) \ 330 (((val) & puc_devices[i].rmask[(index)]) == puc_devices[i].rval[(index)]) 331 332 for (i = 0; puc_devices[i].name != NULL; i++) { 333 if (checkreg(vend, PUC_REG_VEND) && 334 checkreg(prod, PUC_REG_PROD) && 335 checkreg(svend, PUC_REG_SVEND) && 336 checkreg(sprod, PUC_REG_SPROD)) 337 return (&puc_devices[i]); 338 } 339 340 #undef checkreg 341 342 return (NULL); 343 } 344 345 static const char * 346 puc_port_type_name(int type) 347 { 348 349 switch (type) { 350 case PUC_PORT_TYPE_COM: 351 return "com"; 352 case PUC_PORT_TYPE_LPT: 353 return "lpt"; 354 default: 355 panic("puc_port_type_name %d", type); 356 } 357 } 358
Indexes created Fri Sep 26 20:09:58 GMT 2025