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  * $FreeBSD: stable/4/sys/dev/eisa/eisaconf.c 55953 2000-01-14 07:14:17Z peter $
   32  */
   33 
   34 #include "opt_eisa.h"
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/queue.h>
   39 #include <sys/malloc.h>
   40 #include <sys/kernel.h>
   41 #include <sys/module.h>
   42 #include <sys/bus.h>
   43 
   44 #include <machine/limits.h>
   45 #include <machine/bus.h>
   46 #include <machine/resource.h>
   47 #include <sys/rman.h>
   48 
   49 #include <dev/eisa/eisaconf.h>
   50 
   51 typedef struct resvaddr {
   52         u_long  addr;                           /* start address */
   53         u_long  size;                           /* size of reserved area */
   54         int     flags;
   55         struct resource *res;                   /* resource manager handle */
   56         LIST_ENTRY(resvaddr) links;             /* List links */
   57 } resvaddr_t;
   58 
   59 LIST_HEAD(resvlist, resvaddr);
   60 
   61 struct irq_node {
   62         int     irq_no;
   63         int     irq_trigger;
   64         void    *idesc;
   65         TAILQ_ENTRY(irq_node) links;
   66 };
   67 
   68 TAILQ_HEAD(irqlist, irq_node);
   69 
   70 struct eisa_ioconf {
   71         int             slot;
   72         struct resvlist ioaddrs;        /* list of reserved I/O ranges */
   73         struct resvlist maddrs;         /* list of reserved memory ranges */
   74         struct irqlist  irqs;           /* list of reserved irqs */
   75 };
   76 
   77 /* To be replaced by the "super device" generic device structure... */
   78 struct eisa_device {
   79         eisa_id_t               id;
   80         struct eisa_ioconf      ioconf;
   81 };
   82 
   83 
   84 /* Global variable, so UserConfig can change it. */
   85 #define MAX_COL         79
   86 #ifndef EISA_SLOTS
   87 #define EISA_SLOTS 10   /* PCI clashes with higher ones.. fix later */
   88 #endif
   89 int num_eisa_slots = EISA_SLOTS;
   90 
   91 static devclass_t eisa_devclass;
   92 
   93 static void eisa_reg_print (device_t, char *, char *, int *);
   94 static struct irq_node * eisa_find_irq(struct eisa_device *e_dev, int rid);
   95 static struct resvaddr * eisa_find_maddr(struct eisa_device *e_dev, int rid);
   96 static struct resvaddr * eisa_find_ioaddr(struct eisa_device *e_dev, int rid);
   97 
   98 static int
   99 mainboard_probe(device_t dev)
  100 {
  101         char *idstring;
  102         eisa_id_t id = eisa_get_id(dev);
  103 
  104         if (eisa_get_slot(dev) != 0)
  105                 return (ENXIO);
  106 
  107         idstring = (char *)malloc(8 + sizeof(" (System Board)") + 1,
  108                                   M_DEVBUF, M_NOWAIT);
  109         if (idstring == NULL) {
  110                 panic("Eisa probe unable to malloc");
  111         }
  112         sprintf(idstring, "%c%c%c%03x%01x (System Board)",
  113                 EISA_MFCTR_CHAR0(id),
  114                 EISA_MFCTR_CHAR1(id),
  115                 EISA_MFCTR_CHAR2(id),
  116                 EISA_PRODUCT_ID(id),
  117                 EISA_REVISION_ID(id));
  118         device_set_desc(dev, idstring);
  119 
  120         return (0);
  121 }
  122 
  123 static int
  124 mainboard_attach(device_t dev)
  125 {
  126         return (0);
  127 }
  128 
  129 static device_method_t mainboard_methods[] = {
  130         /* Device interface */
  131         DEVMETHOD(device_probe,         mainboard_probe),
  132         DEVMETHOD(device_attach,        mainboard_attach),
  133 
  134         { 0, 0 }
  135 };
  136 
  137 static driver_t mainboard_driver = {
  138         "mainboard",
  139         mainboard_methods,
  140         1,
  141 };
  142 
  143 static devclass_t mainboard_devclass;
  144 
  145 DRIVER_MODULE(mainboard, eisa, mainboard_driver, mainboard_devclass, 0, 0);
  146                 
  147 /*
  148 ** probe for EISA devices
  149 */
  150 static int
  151 eisa_probe(device_t dev)
  152 {
  153         int i,slot;
  154         struct eisa_device *e_dev;
  155         device_t child;
  156         int eisaBase = 0xc80;
  157         eisa_id_t eisa_id;
  158         int devices_found = 0;
  159 
  160         device_set_desc(dev, "EISA bus");
  161 
  162         for (slot = 0; slot < num_eisa_slots; eisaBase+=0x1000, slot++) {
  163                 int id_size = sizeof(eisa_id);
  164                 eisa_id = 0;
  165                 for( i = 0; i < id_size; i++ ) {
  166                         outb(eisaBase,0x80 + i); /*Some cards require priming*/
  167                         eisa_id |= inb(eisaBase+i) << ((id_size-i-1)*CHAR_BIT);
  168                 }
  169                 if (eisa_id & 0x80000000)
  170                         continue;  /* no EISA card in slot */
  171 
  172                 devices_found++;
  173 
  174                 /* Prepare an eisa_device_node for this slot */
  175                 e_dev = (struct eisa_device *)malloc(sizeof(*e_dev),
  176                                                      M_DEVBUF, M_NOWAIT);
  177                 if (!e_dev) {
  178                         device_printf(dev, "cannot malloc eisa_device");
  179                         break; /* Try to attach what we have already */
  180                 }
  181                 bzero(e_dev, sizeof(*e_dev));
  182 
  183                 e_dev->id = eisa_id;
  184 
  185                 e_dev->ioconf.slot = slot; 
  186 
  187                 /* Initialize our lists of reserved addresses */
  188                 LIST_INIT(&(e_dev->ioconf.ioaddrs));
  189                 LIST_INIT(&(e_dev->ioconf.maddrs));
  190                 TAILQ_INIT(&(e_dev->ioconf.irqs));
  191 
  192                 child = device_add_child(dev, NULL, -1);
  193                 device_set_ivars(child, e_dev);
  194         }
  195 
  196         /*
  197          * EISA busses themselves are not easily detectable, the easiest way
  198          * to tell if there is an eisa bus is if we found something - there
  199          * should be a motherboard "card" there somewhere.
  200          */
  201         return devices_found ? 0 : ENXIO;
  202 }
  203 
  204 static void
  205 eisa_probe_nomatch(device_t dev, device_t child)
  206 {
  207         u_int32_t       eisa_id = eisa_get_id(child);
  208         u_int8_t        slot = eisa_get_slot(child);
  209 
  210         device_printf(dev, "unknown card %c%c%c%03x%01x (0x%08x) at slot %d\n",
  211                 EISA_MFCTR_CHAR0(eisa_id),
  212                 EISA_MFCTR_CHAR1(eisa_id),
  213                 EISA_MFCTR_CHAR2(eisa_id),
  214                 EISA_PRODUCT_ID(eisa_id),
  215                 EISA_REVISION_ID(eisa_id),
  216                 eisa_id,
  217                 slot);
  218 
  219         return;
  220 }
  221 
  222 static void
  223 eisa_reg_print (dev, string, separator, column)
  224         device_t        dev;
  225         char *          string;
  226         char *          separator;
  227         int *           column;
  228 {
  229         int length = strlen(string);
  230 
  231         length += (separator ? 2 : 1);
  232 
  233         if (((*column) + length) >= MAX_COL) {
  234                 printf("\n");
  235                 (*column) = 0;
  236         } else if ((*column) != 0) {
  237                 if (separator) {
  238                         printf("%c", *separator);
  239                         (*column)++;
  240                 }
  241                 printf(" ");
  242                 (*column)++;
  243         }
  244 
  245         if ((*column) == 0) {
  246                 (*column) += device_printf(dev, "%s", string);
  247         } else {
  248                 (*column) += printf("%s", string);
  249         }
  250 
  251         return;
  252 }
  253 
  254 static int
  255 eisa_print_child(device_t dev, device_t child)
  256 {
  257         char                    buf[81];
  258         struct eisa_device *    e_dev = device_get_ivars(child);
  259         int                     rid;
  260         struct irq_node *       irq;
  261         struct resvaddr *       resv;
  262         char                    separator = ',';
  263         int                     column = 0;
  264         int                     retval = 0;
  265 
  266         if (device_get_desc(child)) {
  267                 snprintf(buf, sizeof(buf), "<%s>", device_get_desc(child));
  268                 eisa_reg_print(child, buf, NULL, &column);
  269         }
  270 
  271         rid = 0;
  272         while ((resv = eisa_find_ioaddr(e_dev, rid++))) {
  273                 if ((resv->size == 1) ||
  274                     (resv->flags & RESVADDR_BITMASK)) {
  275                         snprintf(buf, sizeof(buf), "%s%lx",
  276                                 ((rid == 1) ? "at 0x" : "0x"),
  277                                 resv->addr);
  278                 } else {
  279                         snprintf(buf, sizeof(buf), "%s%lx-0x%lx",
  280                                 ((rid == 1) ? "at 0x" : "0x"),
  281                                 resv->addr,
  282                                 (resv->addr + (resv->size - 1)));
  283                 }
  284                 eisa_reg_print(child, buf, 
  285                         ((rid == 2) ? &separator : NULL), &column);
  286         }
  287 
  288         rid = 0;
  289         while ((resv = eisa_find_maddr(e_dev, rid++))) {
  290                 if ((resv->size == 1) ||
  291                     (resv->flags & RESVADDR_BITMASK)) {
  292                         snprintf(buf, sizeof(buf), "%s%lx",
  293                                 ((rid == 1) ? "at 0x" : "0x"),
  294                                 resv->addr);
  295                 } else {
  296                         snprintf(buf, sizeof(buf), "%s%lx-0x%lx",
  297                                 ((rid == 1) ? "at 0x" : "0x"),
  298                                 resv->addr,
  299                                 (resv->addr + (resv->size - 1)));
  300                 }
  301                 eisa_reg_print(child, buf, 
  302                         ((rid == 2) ? &separator : NULL), &column);
  303         }
  304 
  305         rid = 0;
  306         while ((irq = eisa_find_irq(e_dev, rid++)) != NULL) {
  307                 snprintf(buf, sizeof(buf), "irq %d (%s)", irq->irq_no,
  308                          (irq->irq_trigger ? "level" : "edge"));
  309                 eisa_reg_print(child, buf, 
  310                         ((rid == 1) ? &separator : NULL), &column);
  311         }
  312 
  313         snprintf(buf, sizeof(buf), "on %s slot %d\n",
  314                 device_get_nameunit(dev), eisa_get_slot(child));
  315         eisa_reg_print(child, buf, NULL, &column);
  316 
  317         return (retval);
  318 }
  319 
  320 static struct irq_node *
  321 eisa_find_irq(struct eisa_device *e_dev, int rid)
  322 {
  323         int i;
  324         struct irq_node *irq;
  325 
  326         for (i = 0, irq = TAILQ_FIRST(&e_dev->ioconf.irqs);
  327              i < rid && irq;
  328              i++, irq = TAILQ_NEXT(irq, links))
  329                 ;
  330         
  331         if (irq)
  332                 return (irq);
  333         else
  334                 return (NULL);
  335 }
  336 
  337 static struct resvaddr *
  338 eisa_find_maddr(struct eisa_device *e_dev, int rid)
  339 {
  340         int i;
  341         struct resvaddr *resv;
  342 
  343         for (i = 0, resv = LIST_FIRST(&e_dev->ioconf.maddrs);
  344              i < rid && resv;
  345              i++, resv = LIST_NEXT(resv, links))
  346                 ;
  347 
  348         return resv;
  349 }
  350 
  351 static struct resvaddr *
  352 eisa_find_ioaddr(struct eisa_device *e_dev, int rid)
  353 {
  354         int i;
  355         struct resvaddr *resv;
  356 
  357         for (i = 0, resv = LIST_FIRST(&e_dev->ioconf.ioaddrs);
  358              i < rid && resv;
  359              i++, resv = LIST_NEXT(resv, links))
  360                 ;
  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                 }
  387                 break;
  388 
  389         default:
  390                 return (ENOENT);
  391         }
  392 
  393         return (0);
  394 }
  395 
  396 static int
  397 eisa_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
  398 {
  399         return (EINVAL);
  400 }
  401 
  402 static struct resource *
  403 eisa_alloc_resource(device_t dev, device_t child, int type, int *rid,
  404                     u_long start, u_long end, u_long count, u_int flags)
  405 {
  406         int isdefault;
  407         struct eisa_device *e_dev = device_get_ivars(child);
  408         struct resource *rv, **rvp = 0;
  409 
  410         isdefault = (device_get_parent(child) == dev
  411                      && start == 0UL && end == ~0UL && count == 1);
  412 
  413         switch (type) {
  414         case SYS_RES_IRQ:
  415                 if (isdefault) {
  416                         struct irq_node * irq = eisa_find_irq(e_dev, *rid);
  417                         if (irq == NULL)
  418                                 return 0;
  419                         start = end = irq->irq_no;
  420                         count = 1;
  421                         if (irq->irq_trigger == EISA_TRIGGER_LEVEL) {
  422                                 flags |= RF_SHAREABLE;
  423                         } else {
  424                                 flags &= ~RF_SHAREABLE;
  425                         }
  426                 }
  427                 break;
  428 
  429         case SYS_RES_MEMORY:
  430                 if (isdefault) {
  431                         struct resvaddr *resv;
  432 
  433                         resv = eisa_find_maddr(e_dev, *rid);
  434                         if (!resv)
  435                                 return 0;
  436 
  437                         start = resv->addr;
  438                         end = resv->addr + (resv->size - 1);
  439                         count = resv->size;
  440                         rvp = &resv->res;
  441                 }
  442                 break;
  443 
  444         case SYS_RES_IOPORT:
  445                 if (isdefault) {
  446                         struct resvaddr *resv;
  447 
  448                         resv = eisa_find_ioaddr(e_dev, *rid);
  449                         if (!resv)
  450                                 return 0;
  451 
  452                         start = resv->addr;
  453                         end = resv->addr + (resv->size - 1);
  454                         count = resv->size;
  455                         rvp = &resv->res;
  456                 }
  457                 break;
  458 
  459         default:
  460                 return 0;
  461         }
  462 
  463         rv = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
  464                                  type, rid, start, end, count, flags);
  465         if (rvp)
  466                 *rvp = rv;
  467 
  468         return rv;
  469 }
  470 
  471 static int
  472 eisa_release_resource(device_t dev, device_t child, int type, int rid,
  473                       struct resource *r)
  474 {
  475         int rv;
  476         struct eisa_device *e_dev = device_get_ivars(child);
  477         struct resvaddr *resv = 0;
  478 
  479         switch (type) {
  480         case SYS_RES_IRQ:
  481                 if (eisa_find_irq(e_dev, rid) == NULL)
  482                         return EINVAL;
  483                 break;
  484 
  485         case SYS_RES_MEMORY:
  486                 if (device_get_parent(child) == dev)
  487                         resv = eisa_find_maddr(e_dev, rid);
  488                 break;
  489 
  490 
  491         case SYS_RES_IOPORT:
  492                 if (device_get_parent(child) == dev)
  493                         resv = eisa_find_ioaddr(e_dev, rid);
  494                 break;
  495 
  496         default:
  497                 return (ENOENT);
  498         }
  499 
  500         rv = BUS_RELEASE_RESOURCE(device_get_parent(dev), child, type, rid, r);
  501 
  502         if (rv == 0) {
  503                 if (resv)
  504                         resv->res = 0;
  505         }
  506 
  507         return rv;
  508 }
  509 
  510 int
  511 eisa_add_intr(device_t dev, int irq, int trigger)
  512 {
  513         struct eisa_device *e_dev = device_get_ivars(dev);
  514         struct irq_node *irq_info;
  515  
  516         irq_info = (struct irq_node *)malloc(sizeof(*irq_info), M_DEVBUF,
  517                                              M_NOWAIT);
  518         if (irq_info == NULL)
  519                 return (1);
  520 
  521         irq_info->irq_no = irq;
  522         irq_info->irq_trigger = trigger;
  523         irq_info->idesc = NULL;
  524         TAILQ_INSERT_TAIL(&e_dev->ioconf.irqs, irq_info, links);
  525         return 0;
  526 }
  527 
  528 static int
  529 eisa_add_resvaddr(struct eisa_device *e_dev, struct resvlist *head, u_long base,
  530                   u_long size, int flags)
  531 {
  532         resvaddr_t *reservation;
  533 
  534         reservation = (resvaddr_t *)malloc(sizeof(resvaddr_t),
  535                                            M_DEVBUF, M_NOWAIT);
  536         if(!reservation)
  537                 return (ENOMEM);
  538 
  539         reservation->addr = base;
  540         reservation->size = size;
  541         reservation->flags = flags;
  542 
  543         if (!head->lh_first) {
  544                 LIST_INSERT_HEAD(head, reservation, links);
  545         }
  546         else {
  547                 resvaddr_t *node;
  548                 for(node = head->lh_first; node; node = node->links.le_next) {
  549                         if (node->addr > reservation->addr) {
  550                                 /*
  551                                  * List is sorted in increasing
  552                                  * address order.
  553                                  */
  554                                 LIST_INSERT_BEFORE(node, reservation, links);
  555                                 break;
  556                         }
  557 
  558                         if (node->addr == reservation->addr) {
  559                                 /*
  560                                  * If the entry we want to add
  561                                  * matches any already in here,
  562                                  * fail.
  563                                  */
  564                                 free(reservation, M_DEVBUF);
  565                                 return (EEXIST);
  566                         }
  567 
  568                         if (!node->links.le_next) {
  569                                 LIST_INSERT_AFTER(node, reservation, links);
  570                                 break;
  571                         }
  572                 }
  573         }
  574         return (0);
  575 }
  576 
  577 int
  578 eisa_add_mspace(device_t dev, u_long mbase, u_long msize, int flags)
  579 {
  580         struct eisa_device *e_dev = device_get_ivars(dev);
  581 
  582         return  eisa_add_resvaddr(e_dev, &(e_dev->ioconf.maddrs), mbase, msize,
  583                                   flags);
  584 }
  585 
  586 int
  587 eisa_add_iospace(device_t dev, u_long iobase, u_long iosize, 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         { 0, 0 }
  617 };
  618 
  619 static driver_t eisa_driver = {
  620         "eisa",
  621         eisa_methods,
  622         1,                      /* no softc */
  623 };
  624 
  625 DRIVER_MODULE(eisa, isab, eisa_driver, eisa_devclass, 0, 0);
  626 DRIVER_MODULE(eisa, nexus, eisa_driver, eisa_devclass, 0, 0);

Cache object: 94d1689e02c53fab2803cda62f1ab71f


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