sys/dev/misc/puc/puc.c

   1 /*
   2  * $NetBSD: puc.c,v 1.7 2000/07/29 17:43:38 jlam Exp $
   3  * $FreeBSD: src/sys/dev/puc/puc.c,v 1.3.2.5 2003/04/04 08:42:17 sobomax Exp $
   4  * $DragonFly: src/sys/dev/misc/puc/puc.c,v 1.11 2006/12/23 00:26:18 swildner Exp $
   5  */
   6
   7 /*-
   8  * Copyright (c) 2002 JF Hay.  All rights reserved.
   9  * Copyright (c) 2000 M. Warner Losh.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice unmodified, this list of conditions, and the following
  16  *    disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1996, 1998, 1999
  35  *      Christopher G. Demetriou.  All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. All advertising materials mentioning features or use of this software
  46  *    must display the following acknowledgement:
  47  *      This product includes software developed by Christopher G. Demetriou
  48  *      for the NetBSD Project.
  49  * 4. The name of the author may not be used to endorse or promote products
  50  *    derived from this software without specific prior written permission
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  53  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  54  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  55  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  56  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  57  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  58  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  61  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  */
  63
  64 /*
  65  * PCI "universal" communication card device driver, glues com, lpt,
  66  * and similar ports to PCI via bridge chip often much larger than
  67  * the devices being glued.
  68  *
  69  * Author: Christopher G. Demetriou, May 14, 1998 (derived from NetBSD
  70  * sys/dev/pci/pciide.c, revision 1.6).
  71  *
  72  * These devices could be (and some times are) described as
  73  * communications/{serial,parallel}, etc. devices with known
  74  * programming interfaces, but those programming interfaces (in
  75  * particular the BAR assignments for devices, etc.) in fact are not
  76  * particularly well defined.
  77  *
  78  * After I/we have seen more of these devices, it may be possible
  79  * to generalize some of these bits.  In particular, devices which
  80  * describe themselves as communications/serial/16[45]50, and
  81  * communications/parallel/??? might be attached via direct
  82  * 'com' and 'lpt' attachments to pci.
  83  */
  84
  85 #include <sys/param.h>
  86 #include <sys/systm.h>
  87 #include <sys/kernel.h>
  88 #include <sys/bus.h>
  89 #include <sys/conf.h>
  90 #include <sys/malloc.h>
  91 #include <sys/rman.h>
  92
  93 #include <bus/pci/pcireg.h>
  94 #include <bus/pci/pcivar.h>
  95 #include "pucvar.h"
  96
  97 #include <opt_puc.h>
  98
  99 struct puc_softc {
 100         const struct puc_device_description *sc_desc;
 101
 102         /* card-global dynamic data */
 103         int                     barmuxed;
 104         int                     irqrid;
 105         struct resource         *irqres;
 106         void                    *intr_cookie;
 107         int                     ilr_enabled;
 108         bus_space_tag_t         ilr_st;
 109         bus_space_handle_t      ilr_sh;
 110
 111         struct {
 112                 struct resource *res;
 113         } sc_bar_mappings[PUC_MAX_BAR];
 114
 115         /* per-port dynamic data */
 116         struct {
 117                 struct device   *dev;
 118                 /* filled in by bus_setup_intr() */
 119                 void            (*ihand) (void *);
 120                 void            *ihandarg;
 121         } sc_ports[PUC_MAX_PORTS];
 122 };
 123
 124 struct puc_device {
 125         struct resource_list resources;
 126         u_int serialfreq;
 127 };
 128
 129 static int puc_pci_probe(device_t dev);
 130 static int puc_pci_attach(device_t dev);
 131 static void puc_intr(void *arg);
 132
 133 static struct resource *puc_alloc_resource(device_t, device_t, int, int *,
 134     u_long, u_long, u_long, u_int);
 135 static int puc_release_resource(device_t, device_t, int, int,
 136     struct resource *);
 137 static int puc_get_resource(device_t, device_t, int, int, u_long *, u_long *);
 138 static int puc_setup_intr(device_t, device_t, struct resource *, int,
 139     void (*)(void *), void *, void **, lwkt_serialize_t);
 140 static int puc_teardown_intr(device_t, device_t, struct resource *,
 141     void *);
 142 static int puc_read_ivar(device_t, device_t, int, uintptr_t *);
 143
 144 static const struct puc_device_description *puc_find_description(uint32_t,
 145     uint32_t, uint32_t, uint32_t);
 146 static void puc_config_superio(device_t);
 147 static void puc_config_win877(struct resource *);
 148 static int puc_find_free_unit(char *);
 149 #ifdef PUC_DEBUG
 150 static void puc_print_win877(bus_space_tag_t, bus_space_handle_t, u_int,
 151     u_int);
 152 static void puc_print_resource_list(struct resource_list *);
 153 #endif
 154
 155 static int
 156 puc_pci_probe(device_t dev)
 157 {
 158         uint32_t v1, v2, d1, d2;
 159         const struct puc_device_description *desc;
 160
 161         if ((pci_read_config(dev, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE) != 0)
 162                 return (ENXIO);
 163
 164         v1 = pci_read_config(dev, PCIR_VENDOR, 2);
 165         d1 = pci_read_config(dev, PCIR_DEVICE, 2);
 166         v2 = pci_read_config(dev, PCIR_SUBVEND_0, 2);
 167         d2 = pci_read_config(dev, PCIR_SUBDEV_0, 2);
 168
 169         desc = puc_find_description(v1, d1, v2, d2);
 170         if (desc == NULL)
 171                 return (ENXIO);
 172         device_set_desc(dev, desc->name);
 173         return (0);
 174 }
 175
 176 static int
 177 puc_probe_ilr(struct puc_softc *sc, struct resource *res)
 178 {
 179         u_char t1, t2;
 180         int i;
 181
 182         switch (sc->sc_desc->ilr_type) {
 183         case PUC_ILR_TYPE_DIGI:
 184                 sc->ilr_st = rman_get_bustag(res);
 185                 sc->ilr_sh = rman_get_bushandle(res);
 186                 for (i = 0; i < 2; i++) {
 187                         t1 = bus_space_read_1(sc->ilr_st, sc->ilr_sh,
 188                             sc->sc_desc->ilr_offset[i]);
 189                         t1 = ~t1;
 190                         bus_space_write_1(sc->ilr_st, sc->ilr_sh,
 191                             sc->sc_desc->ilr_offset[i], t1);
 192                         t2 = bus_space_read_1(sc->ilr_st, sc->ilr_sh,
 193                             sc->sc_desc->ilr_offset[i]);
 194                         if (t2 == t1)
 195                                 return (0);
 196                 }
 197                 return (1);
 198
 199         default:
 200                 break;
 201         }
 202         return (0);
 203 }
 204
 205 static int
 206 puc_pci_attach(device_t dev)
 207 {
 208         char *typestr;
 209         int bidx, childunit, i, irq_setup, rid;
 210         uint32_t v1, v2, d1, d2;
 211         struct puc_softc *sc;
 212         struct puc_device *pdev;
 213         struct resource *res;
 214         struct resource_list_entry *rle;
 215
 216         sc = (struct puc_softc *)device_get_softc(dev);
 217         bzero(sc, sizeof(*sc));
 218         v1 = pci_read_config(dev, PCIR_VENDOR, 2);
 219         d1 = pci_read_config(dev, PCIR_DEVICE, 2);
 220         v2 = pci_read_config(dev, PCIR_SUBVEND_0, 2);
 221         d2 = pci_read_config(dev, PCIR_SUBDEV_0, 2);
 222         sc->sc_desc = puc_find_description(v1, d1, v2, d2);
 223         if (sc->sc_desc == NULL)
 224                 return (ENXIO);
 225
 226 #ifdef PUC_DEBUG
 227         bootverbose = 1;
 228
 229         kprintf("puc: name: %s\n", sc->sc_desc->name);
 230 #endif
 231         rid = 0;
 232         res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
 233             RF_ACTIVE | RF_SHAREABLE);
 234         if (!res)
 235                 return (ENXIO);
 236
 237         sc->irqres = res;
 238         sc->irqrid = rid;
 239 #ifdef PUC_FASTINTR
 240         irq_setup = BUS_SETUP_INTR(device_get_parent(dev), dev, res,
 241                                    INTR_FAST, puc_intr, sc,
 242                                    &sc->intr_cookie, NULL);
 243 #else
 244         irq_setup = ENXIO;
 245 #endif
 246         if (irq_setup != 0)
 247                 irq_setup = BUS_SETUP_INTR(device_get_parent(dev), dev, res,
 248                                            0, puc_intr, sc,
 249                                            &sc->intr_cookie, NULL);
 250         if (irq_setup != 0)
 251                 return (ENXIO);
 252
 253         rid = 0;
 254         for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
 255                 if (rid == sc->sc_desc->ports[i].bar)
 256                         sc->barmuxed = 1;
 257                 rid = sc->sc_desc->ports[i].bar;
 258                 bidx = PUC_PORT_BAR_INDEX(rid);
 259
 260                 if (sc->sc_bar_mappings[bidx].res != NULL)
 261                         continue;
 262                 res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
 263                     0ul, ~0ul, 1, RF_ACTIVE);
 264                 if (res == NULL) {
 265                         kprintf("could not get resource\n");
 266                         continue;
 267                 }
 268                 sc->sc_bar_mappings[bidx].res = res;
 269
 270                 if (sc->sc_desc->ilr_type != PUC_ILR_TYPE_NONE) {
 271                         sc->ilr_enabled = puc_probe_ilr(sc, res);
 272                         if (sc->ilr_enabled)
 273                                 device_printf(dev, "ILR enabled\n");
 274                         else
 275                                 device_printf(dev, "ILR disabled\n");
 276                 }
 277 #ifdef PUC_DEBUG
 278                 kprintf("port bst %x, start %x, end %x\n",
 279                     (u_int)rman_get_bustag(res), (u_int)rman_get_start(res),
 280                     (u_int)rman_get_end(res));
 281 #endif
 282         }
 283
 284         puc_config_superio(dev);
 285
 286         for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
 287                 rid = sc->sc_desc->ports[i].bar;
 288                 bidx = PUC_PORT_BAR_INDEX(rid);
 289                 if (sc->sc_bar_mappings[bidx].res == NULL)
 290                         continue;
 291
 292                 switch (sc->sc_desc->ports[i].type) {
 293                 case PUC_PORT_TYPE_COM:
 294                         typestr = "sio";
 295                         break;
 296                 default:
 297                         continue;
 298                 }
 299                 pdev = kmalloc(sizeof(struct puc_device), M_DEVBUF,
 300                                 M_WAITOK | M_ZERO);
 301                 resource_list_init(&pdev->resources);
 302
 303                 /* First fake up an IRQ resource. */
 304                 resource_list_add(&pdev->resources, SYS_RES_IRQ, 0,
 305                     rman_get_start(sc->irqres), rman_get_end(sc->irqres),
 306                     rman_get_end(sc->irqres) - rman_get_start(sc->irqres) + 1);
 307                 rle = resource_list_find(&pdev->resources, SYS_RES_IRQ, 0);
 308                 rle->res = sc->irqres;
 309
 310                 /* Now fake an IOPORT resource */
 311                 res = sc->sc_bar_mappings[bidx].res;
 312                 resource_list_add(&pdev->resources, SYS_RES_IOPORT, 0,
 313                     rman_get_start(res) + sc->sc_desc->ports[i].offset,
 314                     rman_get_end(res) + sc->sc_desc->ports[i].offset + 8 - 1,
 315                     8);
 316                 rle = resource_list_find(&pdev->resources, SYS_RES_IOPORT, 0);
 317
 318                 if (sc->barmuxed == 0) {
 319                         rle->res = sc->sc_bar_mappings[bidx].res;
 320                 } else {
 321                         rle->res = kmalloc(sizeof(struct resource), M_DEVBUF,
 322                             M_WAITOK | M_ZERO);
 323                         if (rle->res == NULL) {
 324                                 kfree(pdev, M_DEVBUF);
 325                                 return (ENOMEM);
 326                         }
 327
 328                         rle->res->r_start = rman_get_start(res) +
 329                             sc->sc_desc->ports[i].offset;
 330                         rle->res->r_end = rle->res->r_start + 8 - 1;
 331                         rle->res->r_bustag = rman_get_bustag(res);
 332                         bus_space_subregion(rle->res->r_bustag,
 333                             rman_get_bushandle(res),
 334                             sc->sc_desc->ports[i].offset, 8,
 335                             &rle->res->r_bushandle);
 336                 }
 337
 338                 pdev->serialfreq = sc->sc_desc->ports[i].serialfreq;
 339
 340                 childunit = puc_find_free_unit(typestr);
 341                 sc->sc_ports[i].dev = device_add_child(dev, typestr, childunit);
 342                 if (sc->sc_ports[i].dev == NULL) {
 343                         if (sc->barmuxed) {
 344                                 bus_space_unmap(rman_get_bustag(rle->res),
 345                                                 rman_get_bushandle(rle->res),
 346                                                 8);
 347                                 kfree(rle->res, M_DEVBUF);
 348                                 kfree(pdev, M_DEVBUF);
 349                         }
 350                         continue;
 351                 }
 352                 device_set_ivars(sc->sc_ports[i].dev, pdev);
 353                 device_set_desc(sc->sc_ports[i].dev, sc->sc_desc->name);
 354                 if (!bootverbose)
 355                         device_quiet(sc->sc_ports[i].dev);
 356 #ifdef PUC_DEBUG
 357                 kprintf("puc: type %d, bar %x, offset %x\n",
 358                     sc->sc_desc->ports[i].type,
 359                     sc->sc_desc->ports[i].bar,
 360                     sc->sc_desc->ports[i].offset);
 361                 print_resource_list(&pdev->resources);
 362 #endif
 363                 device_set_flags(sc->sc_ports[i].dev,
 364                     sc->sc_desc->ports[i].flags);
 365                 if (device_probe_and_attach(sc->sc_ports[i].dev) != 0) {
 366                         if (sc->barmuxed) {
 367                                 bus_space_unmap(rman_get_bustag(rle->res),
 368                                                 rman_get_bushandle(rle->res),
 369                                                 8);
 370                                 kfree(rle->res, M_DEVBUF);
 371                                 kfree(pdev, M_DEVBUF);
 372                         }
 373                 }
 374         }
 375
 376 #ifdef PUC_DEBUG
 377         bootverbose = 0;
 378 #endif
 379         return (0);
 380 }
 381
 382 static u_int32_t
 383 puc_ilr_read(struct puc_softc *sc)
 384 {
 385         u_int32_t mask;
 386         int i;
 387
 388         mask = 0;
 389         switch (sc->sc_desc->ilr_type) {
 390         case PUC_ILR_TYPE_DIGI:
 391                 for (i = 1; i >= 0; i--) {
 392                         mask = (mask << 8) | (bus_space_read_1(sc->ilr_st,
 393                             sc->ilr_sh, sc->sc_desc->ilr_offset[i]) & 0xff);
 394                 }
 395                 break;
 396
 397         default:
 398                 mask = 0xffffffff;
 399                 break;
 400         }
 401         return (mask);
 402 }
 403
 404 /*
 405  * This is an interrupt handler. For boards that can't tell us which
 406  * device generated the interrupt it just calls all the registered
 407  * handlers sequencially, but for boards that can tell us which
 408  * device(s) generated the interrupt it calls only handlers for devices
 409  * that actually generated the interrupt.
 410  */
 411 static void
 412 puc_intr(void *arg)
 413 {
 414         int i;
 415         u_int32_t ilr_mask;
 416         struct puc_softc *sc;
 417
 418         sc = (struct puc_softc *)arg;
 419         ilr_mask = sc->ilr_enabled ? puc_ilr_read(sc) : 0xffffffff;
 420         for (i = 0; i < PUC_MAX_PORTS; i++)
 421                 if (sc->sc_ports[i].ihand != NULL &&
 422                     ((ilr_mask >> i) & 0x00000001))
 423                         (sc->sc_ports[i].ihand)(sc->sc_ports[i].ihandarg);
 424 }
 425
 426 static const struct puc_device_description *
 427 puc_find_description(uint32_t vend, uint32_t prod, uint32_t svend,
 428     uint32_t sprod)
 429 {
 430         int i;
 431
 432 #define checkreg(val, index) \
 433     (((val) & puc_devices[i].rmask[(index)]) == puc_devices[i].rval[(index)])
 434
 435         for (i = 0; puc_devices[i].name != NULL; i++) {
 436                 if (checkreg(vend, PUC_REG_VEND) &&
 437                     checkreg(prod, PUC_REG_PROD) &&
 438                     checkreg(svend, PUC_REG_SVEND) &&
 439                     checkreg(sprod, PUC_REG_SPROD))
 440                         return (&puc_devices[i]);
 441         }
 442
 443 #undef checkreg
 444
 445         return (NULL);
 446 }
 447
 448 /*
 449  * It might be possible to make these more generic if we can detect patterns.
 450  * For instance maybe if the size of a bar is 0x400 (the old isa space) it
 451  * might contain one or more superio chips.
 452  */
 453 static void
 454 puc_config_superio(device_t dev)
 455 {
 456         struct puc_softc *sc = (struct puc_softc *)device_get_softc(dev);
 457
 458         if (sc->sc_desc->rval[PUC_REG_VEND] == 0x1592 &&
 459             sc->sc_desc->rval[PUC_REG_PROD] == 0x0781)
 460                 puc_config_win877(sc->sc_bar_mappings[0].res);
 461 }
 462
 463 #define rdspio(indx)            (bus_space_write_1(bst, bsh, efir, indx), \
 464                                 bus_space_read_1(bst, bsh, efdr))
 465 #define wrspio(indx,data)       (bus_space_write_1(bst, bsh, efir, indx), \
 466                                 bus_space_write_1(bst, bsh, efdr, data))
 467
 468 #ifdef PUC_DEBUG
 469 static void
 470 puc_print_win877(bus_space_tag_t bst, bus_space_handle_t bsh, u_int efir,
 471         u_int efdr)
 472 {
 473         u_char cr00, cr01, cr04, cr09, cr0d, cr14, cr15, cr16, cr17;
 474         u_char cr18, cr19, cr24, cr25, cr28, cr2c, cr31, cr32;
 475
 476         cr00 = rdspio(0x00);
 477         cr01 = rdspio(0x01);
 478         cr04 = rdspio(0x04);
 479         cr09 = rdspio(0x09);
 480         cr0d = rdspio(0x0d);
 481         cr14 = rdspio(0x14);
 482         cr15 = rdspio(0x15);
 483         cr16 = rdspio(0x16);
 484         cr17 = rdspio(0x17);
 485         cr18 = rdspio(0x18);
 486         cr19 = rdspio(0x19);
 487         cr24 = rdspio(0x24);
 488         cr25 = rdspio(0x25);
 489         cr28 = rdspio(0x28);
 490         cr2c = rdspio(0x2c);
 491         cr31 = rdspio(0x31);
 492         cr32 = rdspio(0x32);
 493         kprintf("877T: cr00 %x, cr01 %x, cr04 %x, cr09 %x, cr0d %x, cr14 %x, "
 494             "cr15 %x, cr16 %x, cr17 %x, cr18 %x, cr19 %x, cr24 %x, cr25 %x, "
 495             "cr28 %x, cr2c %x, cr31 %x, cr32 %x\n", cr00, cr01, cr04, cr09,
 496             cr0d, cr14, cr15, cr16, cr17,
 497             cr18, cr19, cr24, cr25, cr28, cr2c, cr31, cr32);
 498 }
 499 #endif
 500
 501 static void
 502 puc_config_win877(struct resource *res)
 503 {
 504         u_char val;
 505         u_int efir, efdr;
 506         bus_space_tag_t bst;
 507         bus_space_handle_t bsh;
 508
 509         bst = rman_get_bustag(res);
 510         bsh = rman_get_bushandle(res);
 511
 512         /* configure the first W83877TF */
 513         bus_space_write_1(bst, bsh, 0x250, 0x89);
 514         efir = 0x251;
 515         efdr = 0x252;
 516         val = rdspio(0x09) & 0x0f;
 517         if (val != 0x0c) {
 518                 kprintf("conf_win877: Oops not a W83877TF\n");
 519                 return;
 520         }
 521
 522 #ifdef PUC_DEBUG
 523         kprintf("before: ");
 524         puc_print_win877(bst, bsh, efir, efdr);
 525 #endif
 526
 527         val = rdspio(0x16);
 528         val |= 0x04;
 529         wrspio(0x16, val);
 530         val &= ~0x04;
 531         wrspio(0x16, val);
 532
 533         wrspio(0x24, 0x2e8 >> 2);
 534         wrspio(0x25, 0x2f8 >> 2);
 535         wrspio(0x17, 0x03);
 536         wrspio(0x28, 0x43);
 537
 538 #ifdef PUC_DEBUG
 539         kprintf("after: ");
 540         puc_print_win877(bst, bsh, efir, efdr);
 541 #endif
 542
 543         bus_space_write_1(bst, bsh, 0x250, 0xaa);
 544
 545         /* configure the second W83877TF */
 546         bus_space_write_1(bst, bsh, 0x3f0, 0x87);
 547         bus_space_write_1(bst, bsh, 0x3f0, 0x87);
 548         efir = 0x3f0;
 549         efdr = 0x3f1;
 550         val = rdspio(0x09) & 0x0f;
 551         if (val != 0x0c) {
 552                 kprintf("conf_win877: Oops not a W83877TF\n");
 553                 return;
 554         }
 555
 556 #ifdef PUC_DEBUG
 557         kprintf("before: ");
 558         puc_print_win877(bst, bsh, efir, efdr);
 559 #endif
 560
 561         val = rdspio(0x16);
 562         val |= 0x04;
 563         wrspio(0x16, val);
 564         val &= ~0x04;
 565         wrspio(0x16, val);
 566
 567         wrspio(0x24, 0x3e8 >> 2);
 568         wrspio(0x25, 0x3f8 >> 2);
 569         wrspio(0x17, 0x03);
 570         wrspio(0x28, 0x43);
 571
 572 #ifdef PUC_DEBUG
 573         kprintf("after: ");
 574         puc_print_win877(bst, bsh, efir, efdr);
 575 #endif
 576
 577         bus_space_write_1(bst, bsh, 0x3f0, 0xaa);
 578 }
 579
 580 #undef rdspio
 581 #undef wrspio
 582
 583 static int puc_find_free_unit(char *name)
 584 {
 585         devclass_t dc;
 586         int start;
 587         int unit;
 588
 589         unit = 0;
 590         start = 0;
 591         while (resource_int_value(name, unit, "port", &start) == 0 &&
 592             start > 0)
 593                 unit++;
 594         dc = devclass_find(name);
 595         if (dc == NULL)
 596                 return (-1);
 597         while (devclass_get_device(dc, unit))
 598                 unit++;
 599 #ifdef PUC_DEBUG
 600         kprintf("puc: Using %s%d\n", name, unit);
 601 #endif
 602         return (unit);
 603 }
 604
 605 #ifdef PUC_DEBUG
 606 static void
 607 puc_print_resource_list(struct resource_list *rl)
 608 {
 609         struct resource_list_entry *rle;
 610
 611         kprintf("print_resource_list: rl %p\n", rl);
 612         SLIST_FOREACH(rle, rl, link)
 613                 kprintf("type %x, rid %x\n", rle->type, rle->rid);
 614         kprintf("print_resource_list: end.\n");
 615 }
 616 #endif
 617
 618 static struct resource *
 619 puc_alloc_resource(device_t dev, device_t child, int type, int *rid,
 620     u_long start, u_long end, u_long count, u_int flags)
 621 {
 622         struct puc_device *pdev;
 623         struct resource *retval;
 624         struct resource_list *rl;
 625         struct resource_list_entry *rle;
 626
 627         pdev = device_get_ivars(child);
 628         rl = &pdev->resources;
 629
 630 #ifdef PUC_DEBUG
 631         kprintf("puc_alloc_resource: pdev %p, looking for t %x, r %x\n",
 632             pdev, type, *rid);
 633         puc_print_resource_list(rl);
 634 #endif
 635         retval = NULL;
 636         rle = resource_list_find(rl, type, *rid);
 637         if (rle) {
 638                 start = rle->start;
 639                 end = rle->end;
 640                 count = rle->count;
 641 #ifdef PUC_DEBUG
 642                 kprintf("found rle, %lx, %lx, %lx\n", start, end, count);
 643 #endif
 644                 retval = rle->res;
 645         } else
 646                 kprintf("oops rle is gone\n");
 647
 648         return (retval);
 649 }
 650
 651 static int
 652 puc_release_resource(device_t dev, device_t child, int type, int rid,
 653     struct resource *res)
 654 {
 655         return (0);
 656 }
 657
 658 static int
 659 puc_get_resource(device_t dev, device_t child, int type, int rid,
 660     u_long *startp, u_long *countp)
 661 {
 662         struct puc_device *pdev;
 663         struct resource_list *rl;
 664         struct resource_list_entry *rle;
 665
 666         pdev = device_get_ivars(child);
 667         rl = &pdev->resources;
 668
 669 #ifdef PUC_DEBUG
 670         kprintf("puc_get_resource: pdev %p, looking for t %x, r %x\n", pdev,
 671             type, rid);
 672         puc_print_resource_list(rl);
 673 #endif
 674         rle = resource_list_find(rl, type, rid);
 675         if (rle) {
 676 #ifdef PUC_DEBUG
 677                 kprintf("found rle %p,", rle);
 678 #endif
 679                 if (startp != NULL)
 680                         *startp = rle->start;
 681                 if (countp != NULL)
 682                         *countp = rle->count;
 683 #ifdef PUC_DEBUG
 684                 kprintf(" %lx, %lx\n", rle->start, rle->count);
 685 #endif
 686                 return (0);
 687         } else
 688                 kprintf("oops rle is gone\n");
 689         return (ENXIO);
 690 }
 691
 692 static int
 693 puc_setup_intr(device_t dev, device_t child, struct resource *r, int flags,
 694                void (*ihand)(void *), void *arg,
 695                void **cookiep, lwkt_serialize_t serializer)
 696 {
 697         int i;
 698         struct puc_softc *sc;
 699
 700         sc = (struct puc_softc *)device_get_softc(dev);
 701         for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
 702                 if (sc->sc_ports[i].dev == child) {
 703                         if (sc->sc_ports[i].ihand != 0)
 704                                 return (ENXIO);
 705                         sc->sc_ports[i].ihand = ihand;
 706                         sc->sc_ports[i].ihandarg = arg;
 707                         KKASSERT(serializer == NULL); /* not handled yet XXX */
 708                         *cookiep = arg;
 709                         return (0);
 710                 }
 711         }
 712         return (ENXIO);
 713 }
 714
 715 static int
 716 puc_teardown_intr(device_t dev, device_t child, struct resource *r,
 717                   void *cookie)
 718 {
 719         int i;
 720         struct puc_softc *sc;
 721
 722         sc = (struct puc_softc *)device_get_softc(dev);
 723         for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
 724                 if (sc->sc_ports[i].dev == child) {
 725                         sc->sc_ports[i].ihand = NULL;
 726                         sc->sc_ports[i].ihandarg = NULL;
 727                         return (0);
 728                 }
 729         }
 730         return (ENXIO);
 731 }
 732
 733 static int
 734 puc_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
 735 {
 736         struct puc_device *pdev;
 737
 738         pdev = device_get_ivars(child);
 739         if (pdev == NULL)
 740                 return (ENOENT);
 741
 742         switch(index) {
 743         case PUC_IVAR_FREQ:
 744                 *result = pdev->serialfreq;
 745                 break;
 746         default:
 747                 return (ENOENT);
 748         }
 749         return (0);
 750 }
 751
 752 static device_method_t puc_pci_methods[] = {
 753     /* Device interface */
 754     DEVMETHOD(device_probe,             puc_pci_probe),
 755     DEVMETHOD(device_attach,            puc_pci_attach),
 756
 757     DEVMETHOD(bus_alloc_resource,       puc_alloc_resource),
 758     DEVMETHOD(bus_release_resource,     puc_release_resource),
 759     DEVMETHOD(bus_get_resource,         puc_get_resource),
 760     DEVMETHOD(bus_read_ivar,            puc_read_ivar),
 761     DEVMETHOD(bus_setup_intr,           puc_setup_intr),
 762     DEVMETHOD(bus_teardown_intr,        puc_teardown_intr),
 763     DEVMETHOD(bus_print_child,          bus_generic_print_child),
 764     DEVMETHOD(bus_driver_added,         bus_generic_driver_added),
 765     { 0, 0 }
 766 };
 767
 768 static driver_t puc_pci_driver = {
 769         "puc",
 770         puc_pci_methods,
 771         sizeof(struct puc_softc),
 772 };
 773
 774 static devclass_t puc_devclass;
 775
 776 DRIVER_MODULE(puc, pci, puc_pci_driver, puc_devclass, 0, 0);