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: releng/5.0/sys/dev/eisa/eisaconf.c 106229 2002-10-31 00:45:49Z 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 #define MAX_COL         79
   85 #ifndef EISA_SLOTS
   86 #define EISA_SLOTS 10   /* PCI clashes with higher ones.. fix later */
   87 #endif
   88 int num_eisa_slots = EISA_SLOTS;
   89 TUNABLE_INT("hw.eisa_slots", &num_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|M_ZERO);
  177                 if (!e_dev) {
  178                         device_printf(dev, "cannot malloc eisa_device");
  179                         break; /* Try to attach what we have already */
  180                 }
  181 
  182                 e_dev->id = eisa_id;
  183 
  184                 e_dev->ioconf.slot = slot; 
  185 
  186                 /* Initialize our lists of reserved addresses */
  187                 LIST_INIT(&(e_dev->ioconf.ioaddrs));
  188                 LIST_INIT(&(e_dev->ioconf.maddrs));
  189                 TAILQ_INIT(&(e_dev->ioconf.irqs));
  190 
  191                 child = device_add_child(dev, NULL, -1);
  192                 device_set_ivars(child, e_dev);
  193         }
  194 
  195         /*
  196          * EISA busses themselves are not easily detectable, the easiest way
  197          * to tell if there is an eisa bus is if we found something - there
  198          * should be a motherboard "card" there somewhere.
  199          */
  200         return devices_found ? 0 : ENXIO;
  201 }
  202 
  203 static void
  204 eisa_probe_nomatch(device_t dev, device_t child)
  205 {
  206         u_int32_t       eisa_id = eisa_get_id(child);
  207         u_int8_t        slot = eisa_get_slot(child);
  208 
  209         device_printf(dev, "unknown card %c%c%c%03x%01x (0x%08x) at slot %d\n",
  210                 EISA_MFCTR_CHAR0(eisa_id),
  211                 EISA_MFCTR_CHAR1(eisa_id),
  212                 EISA_MFCTR_CHAR2(eisa_id),
  213                 EISA_PRODUCT_ID(eisa_id),
  214                 EISA_REVISION_ID(eisa_id),
  215                 eisa_id,
  216                 slot);
  217 
  218         return;
  219 }
  220 
  221 static void
  222 eisa_reg_print (dev, string, separator, column)
  223         device_t        dev;
  224         char *          string;
  225         char *          separator;
  226         int *           column;
  227 {
  228         int length = strlen(string);
  229 
  230         length += (separator ? 2 : 1);
  231 
  232         if (((*column) + length) >= MAX_COL) {
  233                 printf("\n");
  234                 (*column) = 0;
  235         } else if ((*column) != 0) {
  236                 if (separator) {
  237                         printf("%c", *separator);
  238                         (*column)++;
  239                 }
  240                 printf(" ");
  241                 (*column)++;
  242         }
  243 
  244         if ((*column) == 0) {
  245                 (*column) += device_printf(dev, "%s", string);
  246         } else {
  247                 (*column) += printf("%s", string);
  248         }
  249 
  250         return;
  251 }
  252 
  253 static int
  254 eisa_print_child(device_t dev, device_t child)
  255 {
  256         char                    buf[81];
  257         struct eisa_device *    e_dev = device_get_ivars(child);
  258         int                     rid;
  259         struct irq_node *       irq;
  260         struct resvaddr *       resv;
  261         char                    separator = ',';
  262         int                     column = 0;
  263         int                     retval = 0;
  264 
  265         if (device_get_desc(child)) {
  266                 snprintf(buf, sizeof(buf), "<%s>", device_get_desc(child));
  267                 eisa_reg_print(child, buf, NULL, &column);
  268         }
  269 
  270         rid = 0;
  271         while ((resv = eisa_find_ioaddr(e_dev, rid++))) {
  272                 if ((resv->size == 1) ||
  273                     (resv->flags & RESVADDR_BITMASK)) {
  274                         snprintf(buf, sizeof(buf), "%s%lx",
  275                                 ((rid == 1) ? "at 0x" : "0x"),
  276                                 resv->addr);
  277                 } else {
  278                         snprintf(buf, sizeof(buf), "%s%lx-0x%lx",
  279                                 ((rid == 1) ? "at 0x" : "0x"),
  280                                 resv->addr,
  281                                 (resv->addr + (resv->size - 1)));
  282                 }
  283                 eisa_reg_print(child, buf, 
  284                         ((rid == 2) ? &separator : NULL), &column);
  285         }
  286 
  287         rid = 0;
  288         while ((resv = eisa_find_maddr(e_dev, rid++))) {
  289                 if ((resv->size == 1) ||
  290                     (resv->flags & RESVADDR_BITMASK)) {
  291                         snprintf(buf, sizeof(buf), "%s%lx",
  292                                 ((rid == 1) ? "at 0x" : "0x"),
  293                                 resv->addr);
  294                 } else {
  295                         snprintf(buf, sizeof(buf), "%s%lx-0x%lx",
  296                                 ((rid == 1) ? "at 0x" : "0x"),
  297                                 resv->addr,
  298                                 (resv->addr + (resv->size - 1)));
  299                 }
  300                 eisa_reg_print(child, buf, 
  301                         ((rid == 2) ? &separator : NULL), &column);
  302         }
  303 
  304         rid = 0;
  305         while ((irq = eisa_find_irq(e_dev, rid++)) != NULL) {
  306                 snprintf(buf, sizeof(buf), "irq %d (%s)", irq->irq_no,
  307                          (irq->irq_trigger ? "level" : "edge"));
  308                 eisa_reg_print(child, buf, 
  309                         ((rid == 1) ? &separator : NULL), &column);
  310         }
  311 
  312         snprintf(buf, sizeof(buf), "on %s slot %d\n",
  313                 device_get_nameunit(dev), eisa_get_slot(child));
  314         eisa_reg_print(child, buf, NULL, &column);
  315 
  316         return (retval);
  317 }
  318 
  319 static struct irq_node *
  320 eisa_find_irq(struct eisa_device *e_dev, int rid)
  321 {
  322         int i;
  323         struct irq_node *irq;
  324 
  325         for (i = 0, irq = TAILQ_FIRST(&e_dev->ioconf.irqs);
  326              i < rid && irq;
  327              i++, irq = TAILQ_NEXT(irq, links))
  328                 ;
  329         
  330         if (irq)
  331                 return (irq);
  332         else
  333                 return (NULL);
  334 }
  335 
  336 static struct resvaddr *
  337 eisa_find_maddr(struct eisa_device *e_dev, int rid)
  338 {
  339         int i;
  340         struct resvaddr *resv;
  341 
  342         for (i = 0, resv = LIST_FIRST(&e_dev->ioconf.maddrs);
  343              i < rid && resv;
  344              i++, resv = LIST_NEXT(resv, links))
  345                 ;
  346 
  347         return resv;
  348 }
  349 
  350 static struct resvaddr *
  351 eisa_find_ioaddr(struct eisa_device *e_dev, int rid)
  352 {
  353         int i;
  354         struct resvaddr *resv;
  355 
  356         for (i = 0, resv = LIST_FIRST(&e_dev->ioconf.ioaddrs);
  357              i < rid && resv;
  358              i++, resv = LIST_NEXT(resv, links))
  359                 ;
  360 
  361         return resv;
  362 }
  363 
  364 static int
  365 eisa_read_ivar(device_t dev, device_t child, int which, u_long *result)
  366 {
  367         struct eisa_device *e_dev = device_get_ivars(child);
  368         struct irq_node *irq;
  369 
  370         switch (which) {
  371         case EISA_IVAR_SLOT:
  372                 *result = e_dev->ioconf.slot;
  373                 break;
  374                 
  375         case EISA_IVAR_ID:
  376                 *result = e_dev->id;
  377                 break;
  378 
  379         case EISA_IVAR_IRQ:
  380                 /* XXX only first irq */
  381                 if ((irq = eisa_find_irq(e_dev, 0)) != NULL) {
  382                         *result = irq->irq_no;
  383                 } else {
  384                         *result = -1;
  385                 }
  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 0;
  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                 }
  426                 break;
  427 
  428         case SYS_RES_MEMORY:
  429                 if (isdefault) {
  430                         struct resvaddr *resv;
  431 
  432                         resv = eisa_find_maddr(e_dev, *rid);
  433                         if (!resv)
  434                                 return 0;
  435 
  436                         start = resv->addr;
  437                         end = resv->addr + (resv->size - 1);
  438                         count = resv->size;
  439                         rvp = &resv->res;
  440                 }
  441                 break;
  442 
  443         case SYS_RES_IOPORT:
  444                 if (isdefault) {
  445                         struct resvaddr *resv;
  446 
  447                         resv = eisa_find_ioaddr(e_dev, *rid);
  448                         if (!resv)
  449                                 return 0;
  450 
  451                         start = resv->addr;
  452                         end = resv->addr + (resv->size - 1);
  453                         count = resv->size;
  454                         rvp = &resv->res;
  455                 }
  456                 break;
  457 
  458         default:
  459                 return 0;
  460         }
  461 
  462         rv = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
  463                                  type, rid, start, end, count, flags);
  464         if (rvp)
  465                 *rvp = rv;
  466 
  467         return rv;
  468 }
  469 
  470 static int
  471 eisa_release_resource(device_t dev, device_t child, int type, int rid,
  472                       struct resource *r)
  473 {
  474         int rv;
  475         struct eisa_device *e_dev = device_get_ivars(child);
  476         struct resvaddr *resv = 0;
  477 
  478         switch (type) {
  479         case SYS_RES_IRQ:
  480                 if (eisa_find_irq(e_dev, rid) == NULL)
  481                         return EINVAL;
  482                 break;
  483 
  484         case SYS_RES_MEMORY:
  485                 if (device_get_parent(child) == dev)
  486                         resv = eisa_find_maddr(e_dev, rid);
  487                 break;
  488 
  489 
  490         case SYS_RES_IOPORT:
  491                 if (device_get_parent(child) == dev)
  492                         resv = eisa_find_ioaddr(e_dev, rid);
  493                 break;
  494 
  495         default:
  496                 return (ENOENT);
  497         }
  498 
  499         rv = BUS_RELEASE_RESOURCE(device_get_parent(dev), child, type, rid, r);
  500 
  501         if (rv == 0) {
  502                 if (resv)
  503                         resv->res = 0;
  504         }
  505 
  506         return rv;
  507 }
  508 
  509 int
  510 eisa_add_intr(device_t dev, int irq, int trigger)
  511 {
  512         struct eisa_device *e_dev = device_get_ivars(dev);
  513         struct irq_node *irq_info;
  514  
  515         irq_info = (struct irq_node *)malloc(sizeof(*irq_info), M_DEVBUF,
  516                                              M_NOWAIT);
  517         if (irq_info == NULL)
  518                 return (1);
  519 
  520         irq_info->irq_no = irq;
  521         irq_info->irq_trigger = trigger;
  522         irq_info->idesc = NULL;
  523         TAILQ_INSERT_TAIL(&e_dev->ioconf.irqs, irq_info, links);
  524         return 0;
  525 }
  526 
  527 static int
  528 eisa_add_resvaddr(struct eisa_device *e_dev, struct resvlist *head, u_long base,
  529                   u_long size, int flags)
  530 {
  531         resvaddr_t *reservation;
  532 
  533         reservation = (resvaddr_t *)malloc(sizeof(resvaddr_t),
  534                                            M_DEVBUF, M_NOWAIT);
  535         if(!reservation)
  536                 return (ENOMEM);
  537 
  538         reservation->addr = base;
  539         reservation->size = size;
  540         reservation->flags = flags;
  541 
  542         if (!LIST_FIRST(head)) {
  543                 LIST_INSERT_HEAD(head, reservation, links);
  544         }
  545         else {
  546                 resvaddr_t *node;
  547                 LIST_FOREACH(node, head, links) {
  548                         if (node->addr > reservation->addr) {
  549                                 /*
  550                                  * List is sorted in increasing
  551                                  * address order.
  552                                  */
  553                                 LIST_INSERT_BEFORE(node, reservation, links);
  554                                 break;
  555                         }
  556 
  557                         if (node->addr == reservation->addr) {
  558                                 /*
  559                                  * If the entry we want to add
  560                                  * matches any already in here,
  561                                  * fail.
  562                                  */
  563                                 free(reservation, M_DEVBUF);
  564                                 return (EEXIST);
  565                         }
  566 
  567                         if (!LIST_NEXT(node, links)) {
  568                                 LIST_INSERT_AFTER(node, reservation, links);
  569                                 break;
  570                         }
  571                 }
  572         }
  573         return (0);
  574 }
  575 
  576 int
  577 eisa_add_mspace(device_t dev, u_long mbase, u_long msize, 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 int
  586 eisa_add_iospace(device_t dev, u_long iobase, u_long iosize, int flags)
  587 {
  588         struct eisa_device *e_dev = device_get_ivars(dev);
  589 
  590         return  eisa_add_resvaddr(e_dev, &(e_dev->ioconf.ioaddrs), iobase,
  591                                   iosize, flags);
  592 }
  593 
  594 static device_method_t eisa_methods[] = {
  595         /* Device interface */
  596         DEVMETHOD(device_probe,         eisa_probe),
  597         DEVMETHOD(device_attach,        bus_generic_attach),
  598         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  599         DEVMETHOD(device_suspend,       bus_generic_suspend),
  600         DEVMETHOD(device_resume,        bus_generic_resume),
  601 
  602         /* Bus interface */
  603         DEVMETHOD(bus_print_child,      eisa_print_child),
  604         DEVMETHOD(bus_probe_nomatch,    eisa_probe_nomatch),
  605         DEVMETHOD(bus_read_ivar,        eisa_read_ivar),
  606         DEVMETHOD(bus_write_ivar,       eisa_write_ivar),
  607         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
  608         DEVMETHOD(bus_alloc_resource,   eisa_alloc_resource),
  609         DEVMETHOD(bus_release_resource, eisa_release_resource),
  610         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  611         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  612         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  613         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  614 
  615         { 0, 0 }
  616 };
  617 
  618 static driver_t eisa_driver = {
  619         "eisa",
  620         eisa_methods,
  621         1,                      /* no softc */
  622 };
  623 
  624 DRIVER_MODULE(eisa, eisab, eisa_driver, eisa_devclass, 0, 0);
  625 DRIVER_MODULE(eisa, legacy, eisa_driver, eisa_devclass, 0, 0);

Cache object: 1b531a952aa62a0ea4b129f1612b52ba


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