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("$FreeBSD$");
   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 void eisa_reg_print (device_t, char *, char *, int *);
   97 static struct irq_node * eisa_find_irq(struct eisa_device *e_dev, int rid);
   98 static struct resvaddr * eisa_find_maddr(struct eisa_device *e_dev, int rid);
   99 static struct resvaddr * eisa_find_ioaddr(struct eisa_device *e_dev, int rid);
  100 
  101 static int
  102 mainboard_probe(device_t dev)
  103 {
  104         char *idstring;
  105         eisa_id_t id = eisa_get_id(dev);
  106 
  107         if (eisa_get_slot(dev) != 0)
  108                 return (ENXIO);
  109 
  110         idstring = (char *)malloc(8 + sizeof(" (System Board)") + 1,
  111             M_DEVBUF, M_NOWAIT);
  112         if (idstring == NULL)
  113                 panic("Eisa probe unable to malloc");
  114         sprintf(idstring, "%c%c%c%03x%01x (System Board)",
  115             EISA_MFCTR_CHAR0(id), EISA_MFCTR_CHAR1(id), EISA_MFCTR_CHAR2(id),
  116             EISA_PRODUCT_ID(id), EISA_REVISION_ID(id));
  117         device_set_desc(dev, idstring);
  118 
  119         return (0);
  120 }
  121 
  122 static int
  123 mainboard_attach(device_t dev)
  124 {
  125         return (0);
  126 }
  127 
  128 static device_method_t mainboard_methods[] = {
  129         /* Device interface */
  130         DEVMETHOD(device_probe,         mainboard_probe),
  131         DEVMETHOD(device_attach,        mainboard_attach),
  132 
  133         { 0, 0 }
  134 };
  135 
  136 static driver_t mainboard_driver = {
  137         "mainboard",
  138         mainboard_methods,
  139         1,
  140 };
  141 
  142 static devclass_t mainboard_devclass;
  143 
  144 DRIVER_MODULE(mainboard, eisa, mainboard_driver, mainboard_devclass, 0, 0);
  145                 
  146 /*
  147 ** probe for EISA devices
  148 */
  149 static int
  150 eisa_probe(device_t dev)
  151 {
  152         int devices_found, slot;
  153         struct eisa_device *e_dev;
  154         device_t child;
  155         eisa_id_t eisa_id;
  156 
  157         device_set_desc(dev, "EISA bus");
  158 
  159         devices_found = 0;
  160         for (slot = 0; slot < num_eisa_slots; slot++) {
  161                 eisa_id = 0;
  162                 if (eisa_probe_slot(slot, &eisa_id)) {
  163                         /*
  164                          * If there's no card in the first slot (the
  165                          * mainboard), then the system doesn't have EISA.
  166                          * We abort the probe early in this case since
  167                          * continuing on causes a hang on some systems.
  168                          * Interestingly enough, the inb has been seen to
  169                          * cause the hang.
  170                          */
  171                         if (slot == 0)
  172                                 break;
  173                         continue;
  174                 }
  175 
  176                 devices_found++;
  177 
  178                 /* Prepare an eisa_device_node for this slot */
  179                 e_dev = (struct eisa_device *)malloc(sizeof(*e_dev),
  180                     M_DEVBUF, M_NOWAIT|M_ZERO);
  181                 if (!e_dev) {
  182                         device_printf(dev, "cannot malloc eisa_device");
  183                         break; /* Try to attach what we have already */
  184                 }
  185 
  186                 e_dev->id = eisa_id;
  187                 e_dev->ioconf.slot = slot; 
  188 
  189                 /* Initialize our lists of reserved addresses */
  190                 LIST_INIT(&(e_dev->ioconf.ioaddrs));
  191                 LIST_INIT(&(e_dev->ioconf.maddrs));
  192                 TAILQ_INIT(&(e_dev->ioconf.irqs));
  193 
  194                 child = device_add_child(dev, NULL, -1);
  195                 device_set_ivars(child, e_dev);
  196         }
  197 
  198         /*
  199          * EISA busses themselves are not easily detectable, the easiest way
  200          * to tell if there is an eisa bus is if we found something - there
  201          * should be a motherboard "card" there somewhere.
  202          */
  203         return (devices_found ? 0 : ENXIO);
  204 }
  205 
  206 static int
  207 eisa_probe_slot(int slot, eisa_id_t *eisa_id)
  208 {
  209         eisa_id_t probe_id;
  210         int base, i, id_size;
  211 
  212         probe_id = 0;
  213         id_size = sizeof(probe_id);
  214         base = 0x0c80 + (slot * 0x1000);
  215 
  216         for (i = 0; i < id_size; i++)
  217                 probe_id |= inb(base + i) << ((id_size - i - 1) * CHAR_BIT);
  218 
  219         /* If we found a card, return its EISA id. */
  220         if ((probe_id & 0x80000000) == 0) {
  221                 *eisa_id = probe_id;
  222                 return (0);
  223         }
  224 
  225         return (ENXIO);
  226 }
  227 
  228 static void
  229 eisa_probe_nomatch(device_t dev, device_t child)
  230 {
  231         u_int32_t       eisa_id = eisa_get_id(child);
  232         u_int8_t        slot = eisa_get_slot(child);
  233 
  234         device_printf(dev, "unknown card %c%c%c%03x%01x (0x%08x) at slot %d\n",
  235             EISA_MFCTR_CHAR0(eisa_id), EISA_MFCTR_CHAR1(eisa_id),
  236             EISA_MFCTR_CHAR2(eisa_id), EISA_PRODUCT_ID(eisa_id),
  237             EISA_REVISION_ID(eisa_id), eisa_id, slot);
  238         return;
  239 }
  240 
  241 static void
  242 eisa_reg_print (device_t dev, char *string, char *separator, int *column)
  243 {
  244         int length = strlen(string);
  245 
  246         length += (separator ? 2 : 1);
  247 
  248         if (((*column) + length) >= MAX_COL) {
  249                 printf("\n");
  250                 (*column) = 0;
  251         } else if ((*column) != 0) {
  252                 if (separator) {
  253                         printf("%c", *separator);
  254                         (*column)++;
  255                 }
  256                 printf(" ");
  257                 (*column)++;
  258         }
  259 
  260         if ((*column) == 0)
  261                 (*column) += device_printf(dev, "%s", string);
  262         else
  263                 (*column) += printf("%s", string);
  264 
  265         return;
  266 }
  267 
  268 static int
  269 eisa_print_child(device_t dev, device_t child)
  270 {
  271         char                    buf[81];
  272         struct eisa_device *    e_dev = device_get_ivars(child);
  273         int                     rid;
  274         struct irq_node *       irq;
  275         struct resvaddr *       resv;
  276         char                    separator = ',';
  277         int                     column = 0;
  278         int                     retval = 0;
  279 
  280         if (device_get_desc(child)) {
  281                 snprintf(buf, sizeof(buf), "<%s>", device_get_desc(child));
  282                 eisa_reg_print(child, buf, NULL, &column);
  283         }
  284 
  285         rid = 0;
  286         while ((resv = eisa_find_ioaddr(e_dev, rid++))) {
  287                 if (resv->size == 1 || (resv->flags & RESVADDR_BITMASK))
  288                         snprintf(buf, sizeof(buf), "%s%lx",
  289                             rid == 1 ? "at 0x" : "0x", resv->addr);
  290                 else
  291                         snprintf(buf, sizeof(buf), "%s%lx-0x%lx",
  292                             rid == 1 ? "at 0x" : "0x", resv->addr,
  293                             resv->addr + resv->size - 1);
  294                 eisa_reg_print(child, buf, rid == 2 ? &separator : NULL,
  295                     &column);
  296         }
  297 
  298         rid = 0;
  299         while ((resv = eisa_find_maddr(e_dev, rid++))) {
  300                 if (resv->size == 1 || (resv->flags & RESVADDR_BITMASK))
  301                         snprintf(buf, sizeof(buf), "%s%lx",
  302                             rid == 1 ? "at 0x" : "0x", resv->addr);
  303                 else
  304                         snprintf(buf, sizeof(buf), "%s%lx-0x%lx",
  305                             rid == 1 ? "at 0x" : "0x",
  306                                 resv->addr, resv->addr + resv->size - 1);
  307                 eisa_reg_print(child, buf, rid == 2 ? &separator : NULL,
  308                     &column);
  309         }
  310 
  311         rid = 0;
  312         while ((irq = eisa_find_irq(e_dev, rid++)) != NULL) {
  313                 snprintf(buf, sizeof(buf), "irq %d (%s)", irq->irq_no,
  314                          irq->irq_trigger ? "level" : "edge");
  315                 eisa_reg_print(child, buf, rid == 1 ? &separator : NULL,
  316                     &column);
  317         }
  318 
  319         snprintf(buf, sizeof(buf), "on %s slot %d\n",
  320             device_get_nameunit(dev), eisa_get_slot(child));
  321         eisa_reg_print(child, buf, NULL, &column);
  322 
  323         return (retval);
  324 }
  325 
  326 static struct irq_node *
  327 eisa_find_irq(struct eisa_device *e_dev, int rid)
  328 {
  329         int i;
  330         struct irq_node *irq;
  331 
  332         for (i = 0, irq = TAILQ_FIRST(&e_dev->ioconf.irqs);
  333              i < rid && irq != NULL; i++, irq = TAILQ_NEXT(irq, links))
  334                 continue;
  335         
  336         return (irq);
  337 }
  338 
  339 static struct resvaddr *
  340 eisa_find_maddr(struct eisa_device *e_dev, int rid)
  341 {
  342         int i;
  343         struct resvaddr *resv;
  344 
  345         for (i = 0, resv = LIST_FIRST(&e_dev->ioconf.maddrs);
  346              i < rid && resv != NULL; i++, resv = LIST_NEXT(resv, links))
  347                 continue;
  348 
  349         return (resv);
  350 }
  351 
  352 static struct resvaddr *
  353 eisa_find_ioaddr(struct eisa_device *e_dev, int rid)
  354 {
  355         int i;
  356         struct resvaddr *resv;
  357 
  358         for (i = 0, resv = LIST_FIRST(&e_dev->ioconf.ioaddrs);
  359              i < rid && resv != NULL; i++, resv = LIST_NEXT(resv, links))
  360                 continue;
  361 
  362         return (resv);
  363 }
  364 
  365 static int
  366 eisa_read_ivar(device_t dev, device_t child, int which, u_long *result)
  367 {
  368         struct eisa_device *e_dev = device_get_ivars(child);
  369         struct irq_node *irq;
  370 
  371         switch (which) {
  372         case EISA_IVAR_SLOT:
  373                 *result = e_dev->ioconf.slot;
  374                 break;
  375                 
  376         case EISA_IVAR_ID:
  377                 *result = e_dev->id;
  378                 break;
  379 
  380         case EISA_IVAR_IRQ:
  381                 /* XXX only first irq */
  382                 if ((irq = eisa_find_irq(e_dev, 0)) != NULL)
  383                         *result = irq->irq_no;
  384                 else
  385                         *result = -1;
  386                 break;
  387 
  388         default:
  389                 return (ENOENT);
  390         }
  391 
  392         return (0);
  393 }
  394 
  395 static int
  396 eisa_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
  397 {
  398         return (EINVAL);
  399 }
  400 
  401 static struct resource *
  402 eisa_alloc_resource(device_t dev, device_t child, int type, int *rid,
  403     u_long start, u_long end, u_long count, u_int flags)
  404 {
  405         int isdefault;
  406         struct eisa_device *e_dev = device_get_ivars(child);
  407         struct resource *rv, **rvp = 0;
  408 
  409         isdefault = (device_get_parent(child) == dev &&
  410              start == 0UL && end == ~0UL && count == 1);
  411 
  412         switch (type) {
  413         case SYS_RES_IRQ:
  414                 if (isdefault) {
  415                         struct irq_node * irq = eisa_find_irq(e_dev, *rid);
  416                         if (irq == NULL)
  417                                 return (NULL);
  418                         start = end = irq->irq_no;
  419                         count = 1;
  420                         if (irq->irq_trigger == EISA_TRIGGER_LEVEL)
  421                                 flags |= RF_SHAREABLE;
  422                         else
  423                                 flags &= ~RF_SHAREABLE;
  424                 }
  425                 break;
  426 
  427         case SYS_RES_MEMORY:
  428                 if (isdefault) {
  429                         struct resvaddr *resv;
  430 
  431                         resv = eisa_find_maddr(e_dev, *rid);
  432                         if (resv == NULL)
  433                                 return (NULL);
  434 
  435                         start = resv->addr;
  436                         end = resv->addr + (resv->size - 1);
  437                         count = resv->size;
  438                         rvp = &resv->res;
  439                 }
  440                 break;
  441 
  442         case SYS_RES_IOPORT:
  443                 if (isdefault) {
  444                         struct resvaddr *resv;
  445 
  446                         resv = eisa_find_ioaddr(e_dev, *rid);
  447                         if (resv == NULL)
  448                                 return (NULL);
  449 
  450                         start = resv->addr;
  451                         end = resv->addr + (resv->size - 1);
  452                         count = resv->size;
  453                         rvp = &resv->res;
  454                 }
  455                 break;
  456 
  457         default:
  458                 return 0;
  459         }
  460 
  461         rv = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
  462              type, rid, start, end, count, flags);
  463         if (rvp)
  464                 *rvp = rv;
  465 
  466         return (rv);
  467 }
  468 
  469 static int
  470 eisa_release_resource(device_t dev, device_t child, int type, int rid,
  471                       struct resource *r)
  472 {
  473         int rv;
  474         struct eisa_device *e_dev = device_get_ivars(child);
  475         struct resvaddr *resv = 0;
  476 
  477         switch (type) {
  478         case SYS_RES_IRQ:
  479                 if (eisa_find_irq(e_dev, rid) == NULL)
  480                         return (EINVAL);
  481                 break;
  482 
  483         case SYS_RES_MEMORY:
  484                 if (device_get_parent(child) == dev)
  485                         resv = eisa_find_maddr(e_dev, rid);
  486                 break;
  487 
  488 
  489         case SYS_RES_IOPORT:
  490                 if (device_get_parent(child) == dev)
  491                         resv = eisa_find_ioaddr(e_dev, rid);
  492                 break;
  493 
  494         default:
  495                 return (ENOENT);
  496         }
  497 
  498         rv = BUS_RELEASE_RESOURCE(device_get_parent(dev), child, type, rid, r);
  499 
  500         if (rv == 0) {
  501                 if (resv != NULL)
  502                         resv->res = 0;
  503         }
  504 
  505         return (rv);
  506 }
  507 
  508 static int
  509 eisa_add_intr_m(device_t eisa, device_t dev, int irq, int trigger)
  510 {
  511         struct eisa_device *e_dev = device_get_ivars(dev);
  512         struct irq_node *irq_info;
  513  
  514         irq_info = (struct irq_node *)malloc(sizeof(*irq_info), M_DEVBUF,
  515                                              M_NOWAIT);
  516         if (irq_info == NULL)
  517                 return (1);
  518 
  519         irq_info->irq_no = irq;
  520         irq_info->irq_trigger = trigger;
  521         irq_info->idesc = NULL;
  522         TAILQ_INSERT_TAIL(&e_dev->ioconf.irqs, irq_info, links);
  523         return (0);
  524 }
  525 
  526 static int
  527 eisa_add_resvaddr(struct eisa_device *e_dev, struct resvlist *head, u_long base,
  528                   u_long size, int flags)
  529 {
  530         resvaddr_t *reservation;
  531 
  532         reservation = (resvaddr_t *)malloc(sizeof(resvaddr_t),
  533                                            M_DEVBUF, M_NOWAIT);
  534         if(!reservation)
  535                 return (ENOMEM);
  536 
  537         reservation->addr = base;
  538         reservation->size = size;
  539         reservation->flags = flags;
  540 
  541         if (!LIST_FIRST(head)) {
  542                 LIST_INSERT_HEAD(head, reservation, links);
  543         }
  544         else {
  545                 resvaddr_t *node;
  546                 LIST_FOREACH(node, head, links) {
  547                         if (node->addr > reservation->addr) {
  548                                 /*
  549                                  * List is sorted in increasing
  550                                  * address order.
  551                                  */
  552                                 LIST_INSERT_BEFORE(node, reservation, links);
  553                                 break;
  554                         }
  555 
  556                         if (node->addr == reservation->addr) {
  557                                 /*
  558                                  * If the entry we want to add
  559                                  * matches any already in here,
  560                                  * fail.
  561                                  */
  562                                 free(reservation, M_DEVBUF);
  563                                 return (EEXIST);
  564                         }
  565 
  566                         if (!LIST_NEXT(node, links)) {
  567                                 LIST_INSERT_AFTER(node, reservation, links);
  568                                 break;
  569                         }
  570                 }
  571         }
  572         return (0);
  573 }
  574 
  575 static int
  576 eisa_add_mspace_m(device_t eisa, device_t dev, u_long mbase, u_long msize,
  577     int flags)
  578 {
  579         struct eisa_device *e_dev = device_get_ivars(dev);
  580 
  581         return (eisa_add_resvaddr(e_dev, &(e_dev->ioconf.maddrs), mbase, msize,
  582             flags));
  583 }
  584 
  585 static int
  586 eisa_add_iospace_m(device_t eisa, device_t dev, u_long iobase, u_long iosize,
  587     int flags)
  588 {
  589         struct eisa_device *e_dev = device_get_ivars(dev);
  590 
  591         return (eisa_add_resvaddr(e_dev, &(e_dev->ioconf.ioaddrs), iobase,
  592             iosize, flags));
  593 }
  594 
  595 static device_method_t eisa_methods[] = {
  596         /* Device interface */
  597         DEVMETHOD(device_probe,         eisa_probe),
  598         DEVMETHOD(device_attach,        bus_generic_attach),
  599         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  600         DEVMETHOD(device_suspend,       bus_generic_suspend),
  601         DEVMETHOD(device_resume,        bus_generic_resume),
  602 
  603         /* Bus interface */
  604         DEVMETHOD(bus_print_child,      eisa_print_child),
  605         DEVMETHOD(bus_probe_nomatch,    eisa_probe_nomatch),
  606         DEVMETHOD(bus_read_ivar,        eisa_read_ivar),
  607         DEVMETHOD(bus_write_ivar,       eisa_write_ivar),
  608         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
  609         DEVMETHOD(bus_alloc_resource,   eisa_alloc_resource),
  610         DEVMETHOD(bus_release_resource, eisa_release_resource),
  611         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  612         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  613         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  614         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  615 
  616         /* EISA interface */
  617         DEVMETHOD(eisa_add_intr,        eisa_add_intr_m),
  618         DEVMETHOD(eisa_add_iospace,     eisa_add_iospace_m),
  619         DEVMETHOD(eisa_add_mspace,      eisa_add_mspace_m),
  620 
  621         { 0, 0 }
  622 };
  623 
  624 static driver_t eisa_driver = {
  625         "eisa",
  626         eisa_methods,
  627         1,                      /* no softc */
  628 };
  629 
  630 DRIVER_MODULE(eisa, eisab, eisa_driver, eisa_devclass, 0, 0);
  631 DRIVER_MODULE(eisa, legacy, eisa_driver, eisa_devclass, 0, 0);

Cache object: ffafa14def6331e4ee225857d630b9ba


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