The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/eisa/eisaconf.c

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    1 /*-
    2  * EISA bus probe and attach routines 
    3  *
    4  * Copyright (c) 1995, 1996 Justin T. Gibbs.
    5  * 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 immediately at the beginning of the file, without modification,
   12  *    this list of conditions, and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. The name of the author may not be used to endorse or promote products
   17  *    derived from this software without specific prior written permission.
   18  * 
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND  
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/8.2/sys/dev/eisa/eisaconf.c 194020 2009-06-11 17:06:58Z avg $");
   35 
   36 #include "opt_eisa.h"
   37 
   38 #include <sys/param.h>
   39 #include <sys/systm.h>
   40 #include <sys/queue.h>
   41 #include <sys/limits.h>
   42 #include <sys/malloc.h>
   43 #include <sys/kernel.h>
   44 #include <sys/module.h>
   45 #include <sys/bus.h>
   46 
   47 #include <machine/bus.h>
   48 #include <machine/resource.h>
   49 #include <sys/rman.h>
   50 
   51 #include <dev/eisa/eisaconf.h>
   52 
   53 typedef struct resvaddr {
   54         u_long  addr;                           /* start address */
   55         u_long  size;                           /* size of reserved area */
   56         int     flags;
   57         struct resource *res;                   /* resource manager handle */
   58         LIST_ENTRY(resvaddr) links;             /* List links */
   59 } resvaddr_t;
   60 
   61 LIST_HEAD(resvlist, resvaddr);
   62 
   63 struct irq_node {
   64         int     irq_no;
   65         int     irq_trigger;
   66         void    *idesc;
   67         TAILQ_ENTRY(irq_node) links;
   68 };
   69 
   70 TAILQ_HEAD(irqlist, irq_node);
   71 
   72 struct eisa_ioconf {
   73         int             slot;
   74         struct resvlist ioaddrs;        /* list of reserved I/O ranges */
   75         struct resvlist maddrs;         /* list of reserved memory ranges */
   76         struct irqlist  irqs;           /* list of reserved irqs */
   77 };
   78 
   79 /* To be replaced by the "super device" generic device structure... */
   80 struct eisa_device {
   81         eisa_id_t               id;
   82         struct eisa_ioconf      ioconf;
   83 };
   84 
   85 
   86 #define MAX_COL         79
   87 #ifndef EISA_SLOTS
   88 #define EISA_SLOTS 10   /* PCI clashes with higher ones.. fix later */
   89 #endif
   90 int num_eisa_slots = EISA_SLOTS;
   91 TUNABLE_INT("hw.eisa_slots", &num_eisa_slots);
   92 
   93 static devclass_t eisa_devclass;
   94 
   95 static int eisa_probe_slot(int slot, eisa_id_t *eisa_id);
   96 static struct irq_node *eisa_find_irq(struct eisa_device *e_dev, int rid);
   97 static struct resvaddr *eisa_find_maddr(struct eisa_device *e_dev, int rid);
   98 static struct resvaddr *eisa_find_ioaddr(struct eisa_device *e_dev, int rid);
   99 
  100 static int
  101 mainboard_probe(device_t dev)
  102 {
  103         char *idstring;
  104         eisa_id_t id = eisa_get_id(dev);
  105 
  106         if (eisa_get_slot(dev) != 0)
  107                 return (ENXIO);
  108 
  109         idstring = (char *)malloc(8 + sizeof(" (System Board)") + 1,
  110             M_DEVBUF, M_NOWAIT);
  111         if (idstring == NULL)
  112                 panic("Eisa probe unable to malloc");
  113         sprintf(idstring, "%c%c%c%03x%01x (System Board)",
  114             EISA_MFCTR_CHAR0(id), EISA_MFCTR_CHAR1(id), EISA_MFCTR_CHAR2(id),
  115             EISA_PRODUCT_ID(id), EISA_REVISION_ID(id));
  116         device_set_desc(dev, idstring);
  117 
  118         return (0);
  119 }
  120 
  121 static int
  122 mainboard_attach(device_t dev)
  123 {
  124         return (0);
  125 }
  126 
  127 static device_method_t mainboard_methods[] = {
  128         /* Device interface */
  129         DEVMETHOD(device_probe,         mainboard_probe),
  130         DEVMETHOD(device_attach,        mainboard_attach),
  131 
  132         { 0, 0 }
  133 };
  134 
  135 static driver_t mainboard_driver = {
  136         "mainboard",
  137         mainboard_methods,
  138         1,
  139 };
  140 
  141 static devclass_t mainboard_devclass;
  142 
  143 DRIVER_MODULE(mainboard, eisa, mainboard_driver, mainboard_devclass, 0, 0);
  144                 
  145 /*
  146 ** probe for EISA devices
  147 */
  148 static int
  149 eisa_probe(device_t dev)
  150 {
  151         int devices_found, slot;
  152         struct eisa_device *e_dev;
  153         device_t child;
  154         eisa_id_t eisa_id;
  155 
  156         device_set_desc(dev, "EISA bus");
  157 
  158         devices_found = 0;
  159         for (slot = 0; slot < num_eisa_slots; slot++) {
  160                 eisa_id = 0;
  161                 if (eisa_probe_slot(slot, &eisa_id)) {
  162                         /*
  163                          * If there's no card in the first slot (the
  164                          * mainboard), then the system doesn't have EISA.
  165                          * We abort the probe early in this case since
  166                          * continuing on causes a hang on some systems.
  167                          * Interestingly enough, the inb has been seen to
  168                          * cause the hang.
  169                          */
  170                         if (slot == 0)
  171                                 break;
  172                         continue;
  173                 }
  174 
  175                 devices_found++;
  176 
  177                 /* Prepare an eisa_device_node for this slot */
  178                 e_dev = (struct eisa_device *)malloc(sizeof(*e_dev),
  179                     M_DEVBUF, M_NOWAIT|M_ZERO);
  180                 if (!e_dev) {
  181                         device_printf(dev, "cannot malloc eisa_device");
  182                         break; /* Try to attach what we have already */
  183                 }
  184 
  185                 e_dev->id = eisa_id;
  186                 e_dev->ioconf.slot = slot; 
  187 
  188                 /* Initialize our lists of reserved addresses */
  189                 LIST_INIT(&(e_dev->ioconf.ioaddrs));
  190                 LIST_INIT(&(e_dev->ioconf.maddrs));
  191                 TAILQ_INIT(&(e_dev->ioconf.irqs));
  192 
  193                 child = device_add_child(dev, NULL, -1);
  194                 device_set_ivars(child, e_dev);
  195         }
  196 
  197         /*
  198          * EISA busses themselves are not easily detectable, the easiest way
  199          * to tell if there is an eisa bus is if we found something - there
  200          * should be a motherboard "card" there somewhere.
  201          */
  202         return (devices_found ? 0 : ENXIO);
  203 }
  204 
  205 static int
  206 eisa_probe_slot(int slot, eisa_id_t *eisa_id)
  207 {
  208         eisa_id_t probe_id;
  209         int base, i, id_size;
  210 
  211         probe_id = 0;
  212         id_size = sizeof(probe_id);
  213         base = 0x0c80 + (slot * 0x1000);
  214 
  215         for (i = 0; i < id_size; i++)
  216                 probe_id |= inb(base + i) << ((id_size - i - 1) * CHAR_BIT);
  217 
  218         /* If we found a card, return its EISA id. */
  219         if ((probe_id & 0x80000000) == 0) {
  220                 *eisa_id = probe_id;
  221                 return (0);
  222         }
  223 
  224         return (ENXIO);
  225 }
  226 
  227 static void
  228 eisa_probe_nomatch(device_t dev, device_t child)
  229 {
  230         u_int32_t       eisa_id = eisa_get_id(child);
  231         u_int8_t        slot = eisa_get_slot(child);
  232 
  233         device_printf(dev, "%c%c%c%03x%01x (0x%08x) at slot %d (no driver attached)\n",
  234             EISA_MFCTR_CHAR0(eisa_id), EISA_MFCTR_CHAR1(eisa_id),
  235             EISA_MFCTR_CHAR2(eisa_id), EISA_PRODUCT_ID(eisa_id),
  236             EISA_REVISION_ID(eisa_id), eisa_id, slot);
  237         return;
  238 }
  239 
  240 static int
  241 eisa_print_child(device_t dev, device_t child)
  242 {
  243         struct eisa_device *    e_dev = device_get_ivars(child);
  244         int                     rid;
  245         struct irq_node *       irq;
  246         struct resvaddr *       resv;
  247         int                     retval = 0;
  248 
  249         retval += bus_print_child_header(dev, child);
  250         rid = 0;
  251         while ((resv = eisa_find_ioaddr(e_dev, rid++))) {
  252                 if (resv->size == 1 || (resv->flags & RESVADDR_BITMASK))
  253                         retval += printf("%s%lx", rid == 1 ? " port 0x" : ",0x",
  254                             resv->addr);
  255                 else
  256                         retval += printf("%s%lx-0x%lx", rid == 1 ? " port 0x" :
  257                             ",0x", resv->addr, resv->addr + resv->size - 1);
  258         }
  259         rid = 0;
  260         while ((resv = eisa_find_maddr(e_dev, rid++))) {
  261                 if (resv->size == 1 || (resv->flags & RESVADDR_BITMASK))
  262                         retval += printf("%s%lx", rid == 1 ? " mem 0x" : ",0x",
  263                             resv->addr);
  264                 else
  265                         retval += printf("%s%lx-0x%lx", rid == 1 ? " mem 0x" :
  266                             ",0x", resv->addr, resv->addr + resv->size - 1);
  267         }
  268         rid = 0;
  269         while ((irq = eisa_find_irq(e_dev, rid++)) != NULL)
  270                 retval += printf(" irq %d (%s)", irq->irq_no,
  271                     irq->irq_trigger ? "level" : "edge");
  272         retval += printf(" at slot %d on %s\n", eisa_get_slot(child),
  273             device_get_nameunit(dev));
  274 
  275         return (retval);
  276 }
  277 
  278 static struct irq_node *
  279 eisa_find_irq(struct eisa_device *e_dev, int rid)
  280 {
  281         int i;
  282         struct irq_node *irq;
  283 
  284         for (i = 0, irq = TAILQ_FIRST(&e_dev->ioconf.irqs);
  285              i < rid && irq != NULL; i++, irq = TAILQ_NEXT(irq, links))
  286                 continue;
  287         
  288         return (irq);
  289 }
  290 
  291 static struct resvaddr *
  292 eisa_find_maddr(struct eisa_device *e_dev, int rid)
  293 {
  294         int i;
  295         struct resvaddr *resv;
  296 
  297         for (i = 0, resv = LIST_FIRST(&e_dev->ioconf.maddrs);
  298              i < rid && resv != NULL; i++, resv = LIST_NEXT(resv, links))
  299                 continue;
  300 
  301         return (resv);
  302 }
  303 
  304 static struct resvaddr *
  305 eisa_find_ioaddr(struct eisa_device *e_dev, int rid)
  306 {
  307         int i;
  308         struct resvaddr *resv;
  309 
  310         for (i = 0, resv = LIST_FIRST(&e_dev->ioconf.ioaddrs);
  311              i < rid && resv != NULL; i++, resv = LIST_NEXT(resv, links))
  312                 continue;
  313 
  314         return (resv);
  315 }
  316 
  317 static int
  318 eisa_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  319 {
  320         struct eisa_device *e_dev = device_get_ivars(child);
  321         struct irq_node *irq;
  322 
  323         switch (which) {
  324         case EISA_IVAR_SLOT:
  325                 *result = e_dev->ioconf.slot;
  326                 break;
  327                 
  328         case EISA_IVAR_ID:
  329                 *result = e_dev->id;
  330                 break;
  331 
  332         case EISA_IVAR_IRQ:
  333                 /* XXX only first irq */
  334                 if ((irq = eisa_find_irq(e_dev, 0)) != NULL)
  335                         *result = irq->irq_no;
  336                 else
  337                         *result = -1;
  338                 break;
  339 
  340         default:
  341                 return (ENOENT);
  342         }
  343 
  344         return (0);
  345 }
  346 
  347 static int
  348 eisa_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
  349 {
  350         return (EINVAL);
  351 }
  352 
  353 static struct resource *
  354 eisa_alloc_resource(device_t dev, device_t child, int type, int *rid,
  355     u_long start, u_long end, u_long count, u_int flags)
  356 {
  357         int isdefault;
  358         struct eisa_device *e_dev = device_get_ivars(child);
  359         struct resource *rv, **rvp = 0;
  360 
  361         isdefault = (device_get_parent(child) == dev &&
  362              start == 0UL && end == ~0UL && count == 1);
  363 
  364         switch (type) {
  365         case SYS_RES_IRQ:
  366                 if (isdefault) {
  367                         struct irq_node * irq = eisa_find_irq(e_dev, *rid);
  368                         if (irq == NULL)
  369                                 return (NULL);
  370                         start = end = irq->irq_no;
  371                         count = 1;
  372                         if (irq->irq_trigger == EISA_TRIGGER_LEVEL)
  373                                 flags |= RF_SHAREABLE;
  374                         else
  375                                 flags &= ~RF_SHAREABLE;
  376                 }
  377                 break;
  378 
  379         case SYS_RES_MEMORY:
  380                 if (isdefault) {
  381                         struct resvaddr *resv;
  382 
  383                         resv = eisa_find_maddr(e_dev, *rid);
  384                         if (resv == NULL)
  385                                 return (NULL);
  386 
  387                         start = resv->addr;
  388                         end = resv->addr + (resv->size - 1);
  389                         count = resv->size;
  390                         rvp = &resv->res;
  391                 }
  392                 break;
  393 
  394         case SYS_RES_IOPORT:
  395                 if (isdefault) {
  396                         struct resvaddr *resv;
  397 
  398                         resv = eisa_find_ioaddr(e_dev, *rid);
  399                         if (resv == NULL)
  400                                 return (NULL);
  401 
  402                         start = resv->addr;
  403                         end = resv->addr + (resv->size - 1);
  404                         count = resv->size;
  405                         rvp = &resv->res;
  406                 }
  407                 break;
  408 
  409         default:
  410                 return 0;
  411         }
  412 
  413         rv = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
  414              type, rid, start, end, count, flags);
  415         if (rvp)
  416                 *rvp = rv;
  417 
  418         return (rv);
  419 }
  420 
  421 static int
  422 eisa_release_resource(device_t dev, device_t child, int type, int rid,
  423                       struct resource *r)
  424 {
  425         int rv;
  426         struct eisa_device *e_dev = device_get_ivars(child);
  427         struct resvaddr *resv = 0;
  428 
  429         switch (type) {
  430         case SYS_RES_IRQ:
  431                 if (eisa_find_irq(e_dev, rid) == NULL)
  432                         return (EINVAL);
  433                 break;
  434 
  435         case SYS_RES_MEMORY:
  436                 if (device_get_parent(child) == dev)
  437                         resv = eisa_find_maddr(e_dev, rid);
  438                 break;
  439 
  440 
  441         case SYS_RES_IOPORT:
  442                 if (device_get_parent(child) == dev)
  443                         resv = eisa_find_ioaddr(e_dev, rid);
  444                 break;
  445 
  446         default:
  447                 return (ENOENT);
  448         }
  449 
  450         rv = BUS_RELEASE_RESOURCE(device_get_parent(dev), child, type, rid, r);
  451 
  452         if (rv == 0) {
  453                 if (resv != NULL)
  454                         resv->res = 0;
  455         }
  456 
  457         return (rv);
  458 }
  459 
  460 static int
  461 eisa_add_intr_m(device_t eisa, device_t dev, int irq, int trigger)
  462 {
  463         struct eisa_device *e_dev = device_get_ivars(dev);
  464         struct irq_node *irq_info;
  465  
  466         irq_info = (struct irq_node *)malloc(sizeof(*irq_info), M_DEVBUF,
  467                                              M_NOWAIT);
  468         if (irq_info == NULL)
  469                 return (1);
  470 
  471         irq_info->irq_no = irq;
  472         irq_info->irq_trigger = trigger;
  473         irq_info->idesc = NULL;
  474         TAILQ_INSERT_TAIL(&e_dev->ioconf.irqs, irq_info, links);
  475         return (0);
  476 }
  477 
  478 static int
  479 eisa_add_resvaddr(struct eisa_device *e_dev, struct resvlist *head, u_long base,
  480                   u_long size, int flags)
  481 {
  482         resvaddr_t *reservation;
  483 
  484         reservation = (resvaddr_t *)malloc(sizeof(resvaddr_t),
  485                                            M_DEVBUF, M_NOWAIT);
  486         if(!reservation)
  487                 return (ENOMEM);
  488 
  489         reservation->addr = base;
  490         reservation->size = size;
  491         reservation->flags = flags;
  492 
  493         if (!LIST_FIRST(head)) {
  494                 LIST_INSERT_HEAD(head, reservation, links);
  495         }
  496         else {
  497                 resvaddr_t *node;
  498                 LIST_FOREACH(node, head, links) {
  499                         if (node->addr > reservation->addr) {
  500                                 /*
  501                                  * List is sorted in increasing
  502                                  * address order.
  503                                  */
  504                                 LIST_INSERT_BEFORE(node, reservation, links);
  505                                 break;
  506                         }
  507 
  508                         if (node->addr == reservation->addr) {
  509                                 /*
  510                                  * If the entry we want to add
  511                                  * matches any already in here,
  512                                  * fail.
  513                                  */
  514                                 free(reservation, M_DEVBUF);
  515                                 return (EEXIST);
  516                         }
  517 
  518                         if (!LIST_NEXT(node, links)) {
  519                                 LIST_INSERT_AFTER(node, reservation, links);
  520                                 break;
  521                         }
  522                 }
  523         }
  524         return (0);
  525 }
  526 
  527 static int
  528 eisa_add_mspace_m(device_t eisa, device_t dev, u_long mbase, u_long msize,
  529     int flags)
  530 {
  531         struct eisa_device *e_dev = device_get_ivars(dev);
  532 
  533         return (eisa_add_resvaddr(e_dev, &(e_dev->ioconf.maddrs), mbase, msize,
  534             flags));
  535 }
  536 
  537 static int
  538 eisa_add_iospace_m(device_t eisa, device_t dev, u_long iobase, u_long iosize,
  539     int flags)
  540 {
  541         struct eisa_device *e_dev = device_get_ivars(dev);
  542 
  543         return (eisa_add_resvaddr(e_dev, &(e_dev->ioconf.ioaddrs), iobase,
  544             iosize, flags));
  545 }
  546 
  547 static device_method_t eisa_methods[] = {
  548         /* Device interface */
  549         DEVMETHOD(device_probe,         eisa_probe),
  550         DEVMETHOD(device_attach,        bus_generic_attach),
  551         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  552         DEVMETHOD(device_suspend,       bus_generic_suspend),
  553         DEVMETHOD(device_resume,        bus_generic_resume),
  554 
  555         /* Bus interface */
  556         DEVMETHOD(bus_print_child,      eisa_print_child),
  557         DEVMETHOD(bus_probe_nomatch,    eisa_probe_nomatch),
  558         DEVMETHOD(bus_read_ivar,        eisa_read_ivar),
  559         DEVMETHOD(bus_write_ivar,       eisa_write_ivar),
  560         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
  561         DEVMETHOD(bus_alloc_resource,   eisa_alloc_resource),
  562         DEVMETHOD(bus_release_resource, eisa_release_resource),
  563         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  564         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  565         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  566         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  567 
  568         /* EISA interface */
  569         DEVMETHOD(eisa_add_intr,        eisa_add_intr_m),
  570         DEVMETHOD(eisa_add_iospace,     eisa_add_iospace_m),
  571         DEVMETHOD(eisa_add_mspace,      eisa_add_mspace_m),
  572 
  573         { 0, 0 }
  574 };
  575 
  576 static driver_t eisa_driver = {
  577         "eisa",
  578         eisa_methods,
  579         1,                      /* no softc */
  580 };
  581 
  582 DRIVER_MODULE(eisa, eisab, eisa_driver, eisa_devclass, 0, 0);
  583 DRIVER_MODULE(eisa, legacy, eisa_driver, eisa_devclass, 0, 0);

Cache object: 6247eae71b204b664a7800277fdcc104


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